The Effect of Chitosan, Sorbitol, and Heating Temperature Bioplastic Solution...IJERA Editor
Nowadays, bioplastics is often researched to substitute the conventional plastics because bioplastics come from
raw materials that is very enviromentally friendly and bioplastics is degradable. The purposes of this research are
to know the characteristics of starch from durian seed and to know the effect of additional chitosan as filler,
sorbitol as plasticizer, and variation of heating temperature bioplastic solution on mechanical properties of
bioplastics. In process, the ratio between durian-seed starch and chitosan are 7:3, 8:2 and 9:1 gram, while the
concentration of sorbitol are 20%, 30%, and 40%. The heating temperature of bioplastic solution is varied at 70
oC, 80 oC and 90 oC. Result of bioplastic FTIR shows there is increation of wave number N-H from 1570.06 cm-
1
to 1589.34 cm-1 and O-H from 3352.28 cm-1
to 3653.18 cm-1
. The characteristic of durian seed starch has water
content 12.73%, ash content 0,51%, starch content 76,65%, amylose content 22.34%, amylopectin content
54.32%, protein content 11.61%, and fat content 0.61%. Optimum mechanical properties of bioplastic from
durian seed starch occurs in heating temperature 70 oC with composition between durian-seed starch and
chitosan is 7:3 grams and sorbitol 20.0 grams.
The Effect of Chitosan, Sorbitol, and Heating Temperature Bioplastic Solution...IJERA Editor
Nowadays, bioplastics is often researched to substitute the conventional plastics because bioplastics come from
raw materials that is very enviromentally friendly and bioplastics is degradable. The purposes of this research are
to know the characteristics of starch from durian seed and to know the effect of additional chitosan as filler,
sorbitol as plasticizer, and variation of heating temperature bioplastic solution on mechanical properties of
bioplastics. In process, the ratio between durian-seed starch and chitosan are 7:3, 8:2 and 9:1 gram, while the
concentration of sorbitol are 20%, 30%, and 40%. The heating temperature of bioplastic solution is varied at 70
oC, 80 oC and 90 oC. Result of bioplastic FTIR shows there is increation of wave number N-H from 1570.06 cm-
1 to 1589.34 cm-1 and O-H from 3352.28 cm-1 to 3653.18 cm-1. The characteristic of durian seed starch has water
content 12.73%, ash content 0,51%, starch content 76,65%, amylose content 22.34%, amylopectin content
54.32%, protein content 11.61%, and fat content 0.61%. Optimum mechanical properties of bioplastic from
durian seed starch occurs in heating temperature 70 oC with composition between durian-seed starch and
chitosan is 7:3 grams and sorbitol 20.0 grams.
This research deals with study of Degradation
behavior of starch blended with different percentage of
polypropylene (PP) .Twin screw extruder at 160- 190 °C and 50
rpm is used for manufacture of blend sheet. Degradation test
achieved according to ASTM standard (D 638 IV and D570-98).
Studies on their degradation properties were carried out by Soil
burial test, Water absorption test and Hydrolysis test. The
morphology test of the polypropylene / starch blend samples
was obviously seen in the (Dino- Light- Digital Microscope),
Results of soil burial test show that tensile strength and
percentage of elongation of polypropylene / starch blend
decrease with increasing the starch content and burial time. The
hydrolysis test show the weight losses increasing with the
increasing amount of starch. High percent of polypropylene
found to decrease the amount of water absorption of the blend.
The physical appearance and morphology studies of
polypropylene / starch blend after burial test in soil and
hydrolysis in water environment showed that all blend samples
was obviously changed after 90-day study period, whereas the
pure polypropylene samples remained unchanged
The Effect of Chitosan, Sorbitol, and Heating Temperature Bioplastic Solution...IJERA Editor
Nowadays, bioplastics is often researched to substitute the conventional plastics because bioplastics come from
raw materials that is very enviromentally friendly and bioplastics is degradable. The purposes of this research are
to know the characteristics of starch from durian seed and to know the effect of additional chitosan as filler,
sorbitol as plasticizer, and variation of heating temperature bioplastic solution on mechanical properties of
bioplastics. In process, the ratio between durian-seed starch and chitosan are 7:3, 8:2 and 9:1 gram, while the
concentration of sorbitol are 20%, 30%, and 40%. The heating temperature of bioplastic solution is varied at 70
oC, 80 oC and 90 oC. Result of bioplastic FTIR shows there is increation of wave number N-H from 1570.06 cm-
1
to 1589.34 cm-1 and O-H from 3352.28 cm-1
to 3653.18 cm-1
. The characteristic of durian seed starch has water
content 12.73%, ash content 0,51%, starch content 76,65%, amylose content 22.34%, amylopectin content
54.32%, protein content 11.61%, and fat content 0.61%. Optimum mechanical properties of bioplastic from
durian seed starch occurs in heating temperature 70 oC with composition between durian-seed starch and
chitosan is 7:3 grams and sorbitol 20.0 grams.
The Effect of Chitosan, Sorbitol, and Heating Temperature Bioplastic Solution...IJERA Editor
Nowadays, bioplastics is often researched to substitute the conventional plastics because bioplastics come from
raw materials that is very enviromentally friendly and bioplastics is degradable. The purposes of this research are
to know the characteristics of starch from durian seed and to know the effect of additional chitosan as filler,
sorbitol as plasticizer, and variation of heating temperature bioplastic solution on mechanical properties of
bioplastics. In process, the ratio between durian-seed starch and chitosan are 7:3, 8:2 and 9:1 gram, while the
concentration of sorbitol are 20%, 30%, and 40%. The heating temperature of bioplastic solution is varied at 70
oC, 80 oC and 90 oC. Result of bioplastic FTIR shows there is increation of wave number N-H from 1570.06 cm-
1 to 1589.34 cm-1 and O-H from 3352.28 cm-1 to 3653.18 cm-1. The characteristic of durian seed starch has water
content 12.73%, ash content 0,51%, starch content 76,65%, amylose content 22.34%, amylopectin content
54.32%, protein content 11.61%, and fat content 0.61%. Optimum mechanical properties of bioplastic from
durian seed starch occurs in heating temperature 70 oC with composition between durian-seed starch and
chitosan is 7:3 grams and sorbitol 20.0 grams.
This research deals with study of Degradation
behavior of starch blended with different percentage of
polypropylene (PP) .Twin screw extruder at 160- 190 °C and 50
rpm is used for manufacture of blend sheet. Degradation test
achieved according to ASTM standard (D 638 IV and D570-98).
Studies on their degradation properties were carried out by Soil
burial test, Water absorption test and Hydrolysis test. The
morphology test of the polypropylene / starch blend samples
was obviously seen in the (Dino- Light- Digital Microscope),
Results of soil burial test show that tensile strength and
percentage of elongation of polypropylene / starch blend
decrease with increasing the starch content and burial time. The
hydrolysis test show the weight losses increasing with the
increasing amount of starch. High percent of polypropylene
found to decrease the amount of water absorption of the blend.
The physical appearance and morphology studies of
polypropylene / starch blend after burial test in soil and
hydrolysis in water environment showed that all blend samples
was obviously changed after 90-day study period, whereas the
pure polypropylene samples remained unchanged
coir fibers tech has improved so much it can produce micro fibers from petroleum that can be upgraded into artificialleather that can mimic naturalleather
Technical presentation on the latest class of environmental friendly class of bio-plastics which are completely degradable and uses low energy. These bio-plastics are widely used in European markets and are being used in food, pharmaceutical and in sanitary products.
Optimizing some conditions for spray drying in synbiotic capsule from Bacillu...inventionjournals
The study is of determination of various conditions for spray drying in producing synbiotic in the form of capsule from Bacillus subtilis natto. The experiments were conducted to examine effects of various factors such as the resistant starch-to-matodextrin ratio before drying, the inlet gas temperature and the inlet flow. The optimization experiments are administered: a ratio of wall materials to the core material is 5% (w/v) in which the ratio of resistant starch and maltodextrin is 1:9, the inlet gas temperatureis 1100C, the inlet flow is 5.60 ml/minute and the spray pressure is 2 bar. In the condition for spray drying as mentioned earlier, the initial step for trial production of synbiotic capsules was conducted with the cell density of B.subtilis natto being 8.55 ± 0.18 log(CFU/g), the activating effect of nattokinase is 518.2 FU/g and the moisture is 9.11%. During 60 days’ preservation of the product, the resulting indexes such as the cell density of B.subtilis natto in the capsule, the activating effect of nattokinase and the moisture are stable.
Optimizing some conditions for spray drying in synbiotic capsule from Bacillu...inventionjournals
The study is of determination of various conditions for spray drying in producing synbiotic in the form of capsule from Bacillus subtilis natto. The experiments were conducted to examine effects of various factors such as the resistant starch-to-matodextrin ratio before drying, the inlet gas temperature and the inlet flow. The optimization experiments are administered: a ratio of wall materials to the core material is 5% (w/v) in which the ratio of resistant starch and maltodextrin is 1:9, the inlet gas temperatureis 1100C, the inlet flow is 5.60 ml/minute and the spray pressure is 2 bar. In the condition for spray drying as mentioned earlier, the initial step for trial production of synbiotic capsules was conducted with the cell density of B.subtilis natto being 8.55 ± 0.18 log(CFU/g), the activating effect of nattokinase is 518.2 FU/g and the moisture is 9.11%. During 60 days’ preservation of the product, the resulting indexes such as the cell density of B.subtilis natto in the capsule, the activating effect of nattokinase and the moisture are stable.
DEVELOPMENT AND EVALUATION OF SOME OF THE MECHANICAL PROPERTIES OF KENAF/POLY...IAEME Publication
Plant fibers are mainly composed of cellulose, hemicelluloses and lignin. The main advantage of employing natural fibers is that these are biodegradable and renewable and exhibit low cost, low density and high toughness. The proposed work focuses on the development of cellulose composites using Kenaf fibers. The kenaf plant (hibiscus cannabinus) belongs to Malvaceae family. In this work a study on the feasibility of extracting cellulose from plant fiber will be carried out by a chemical procedure, water pre hydrolysis. The composites will be prepared by using cellulose by using hand-layup technique. The composites are characterized by means tensile test based on ASTM standard.
Film production with groundnut extraction cake and its physico-mechanical pro...AI Publications
The edible films have been produced from protein containing foods especially nuts by casting process and no available researches found on using the extracted proteins in dried extraction cake of groundnut seed.The aim of this research was to get an edible film from dried extraction cake of groundnut seed and to characterise their physico-mechanical, optical and barrier permeabilities with different concentration of alkali solution (NaOH). The films presented high values of L* (average as 84.8) in terms of lightness.The tensile strength (MPa) and elongations at break (%) decresed with increase in alkali solution. The alkali solutions increased the water vapour permeabilites (WVP) but decreased oxygen permeabilites (OP) of the films. The protein fraction of extraction cake of groundnut seeds showed the potential to be processable into the edible films. Arginine (Arg) and cysteine (Cys) were the major amino acids in the films.The produced films were used to package olive oil for 60 days of storage at room temperature.The peroxide values of olive oil increased less that conditioned in produced films and good barrier plastic material (PP) during storage period.The films improved the olive oil chemical stability and it showed suitable film properties.
The development of sustainable bioplastics for new applications in packaging ...Agriculture Journal IJOEAR
Abstract— The advantage of biodegradable plastics is their degradation under the influence of biological systems into substances naturally present in the environment, which are then placed in a natural circulation cycle of matter. Moreover, the biodegradable plastics waste not require additional segregation and separation from households, and are collected together with other organic waste and subjected to recycling under aerobic or anaerobic conditions. Use of bioplastics reduces the harmful effects of waste on the environment, but does not eliminate it completely.
The article presents the results of (bio) degradation studies under industrial and laboratory (MicroOxymax) composting conditions as well as at atmospheric conditions of commercial disposable dishes from the Nature Works® PLA. Were also carried out investigation of abiotic degradation under laboratory conditions. It was found, from the macro- and microscopic observations, that the tested cups (bio) degraded in the selected environments, wherein in a greater extent under industrial composting conditions than in MicroOxymax. The GPC results, which show significantly reduce in the molar mass of the tested samples after specified incubation times in all environments, indicates that the hydrolytic degradation process occurs predominantly.
Introduction
Types of Biodegradable plastic
Renewable resources
Non-renewable
Other biodegradable plastics
Properties of biodegradable plastics
Mechanism of Biodegradation of plastics
Factors affecting biodegradation
Applications of Biodegradable plastics
Advantage of biodegradable plastic
Disadvantage of biodegradable plastic
Conclusion
References
Effect of addition of polyethylene glycol (peg) as plasticizer on edible film...Nabila298243
Gelatin is a type of protein extracted from animal collagen tissue found in animal skin, bones and ligaments or connective tissue. Gelatin has high digestibility properties therefore it has the potential to be the raw material for making edible films. The edible film is a thin layer produced from edible materials. Edible films can be formed from three types of constituent materials, such as hydrocolloids, lipids, and mixtures/composites of the two. Several types of hydrocolloids that are able to make edible films are proteins (gelatin). The test parameters include tensile strength, elongation, thickness, water vapour transmission rate, moisture content and amino acid profile. PEG in edible films is a useful plasticizer to reduce the stiffness of the polymer. The best edible film from milkfish skin gelatin was obtained at a concentration of 1% polyethylene glycol plasticizer with physicochemical characteristics including tensile strength of 11.94 MPa, elongation of 2.55%, thickness of 0.10 mm, water vapour transmission rate of 159.36 g/m2/day and water content of 16.03% with the highest amino acid content, namely Glycine at 172021.41 mg/kg and the lowest, namely L-Tyrosine at 4333.40 mg/kg.
Water Absorption, Thickness Swelling and Rheological Properties of Agro Fiber...iosrjce
IOSR Journal of Polymer and Textile Engineering (IOSR-JPTE) is ambitious to disseminate information and experience in education, practice and investigation between polimer, fibric and all the sciences involved in textile.
It's about synthesis of bioplastic. specifically about PHA and bioplastic synthesis from red algae. It was completed under guidance of Mr. Abdul Shafiullah, Lecturer SSC, Shimoga
coir fibers tech has improved so much it can produce micro fibers from petroleum that can be upgraded into artificialleather that can mimic naturalleather
Technical presentation on the latest class of environmental friendly class of bio-plastics which are completely degradable and uses low energy. These bio-plastics are widely used in European markets and are being used in food, pharmaceutical and in sanitary products.
Optimizing some conditions for spray drying in synbiotic capsule from Bacillu...inventionjournals
The study is of determination of various conditions for spray drying in producing synbiotic in the form of capsule from Bacillus subtilis natto. The experiments were conducted to examine effects of various factors such as the resistant starch-to-matodextrin ratio before drying, the inlet gas temperature and the inlet flow. The optimization experiments are administered: a ratio of wall materials to the core material is 5% (w/v) in which the ratio of resistant starch and maltodextrin is 1:9, the inlet gas temperatureis 1100C, the inlet flow is 5.60 ml/minute and the spray pressure is 2 bar. In the condition for spray drying as mentioned earlier, the initial step for trial production of synbiotic capsules was conducted with the cell density of B.subtilis natto being 8.55 ± 0.18 log(CFU/g), the activating effect of nattokinase is 518.2 FU/g and the moisture is 9.11%. During 60 days’ preservation of the product, the resulting indexes such as the cell density of B.subtilis natto in the capsule, the activating effect of nattokinase and the moisture are stable.
Optimizing some conditions for spray drying in synbiotic capsule from Bacillu...inventionjournals
The study is of determination of various conditions for spray drying in producing synbiotic in the form of capsule from Bacillus subtilis natto. The experiments were conducted to examine effects of various factors such as the resistant starch-to-matodextrin ratio before drying, the inlet gas temperature and the inlet flow. The optimization experiments are administered: a ratio of wall materials to the core material is 5% (w/v) in which the ratio of resistant starch and maltodextrin is 1:9, the inlet gas temperatureis 1100C, the inlet flow is 5.60 ml/minute and the spray pressure is 2 bar. In the condition for spray drying as mentioned earlier, the initial step for trial production of synbiotic capsules was conducted with the cell density of B.subtilis natto being 8.55 ± 0.18 log(CFU/g), the activating effect of nattokinase is 518.2 FU/g and the moisture is 9.11%. During 60 days’ preservation of the product, the resulting indexes such as the cell density of B.subtilis natto in the capsule, the activating effect of nattokinase and the moisture are stable.
DEVELOPMENT AND EVALUATION OF SOME OF THE MECHANICAL PROPERTIES OF KENAF/POLY...IAEME Publication
Plant fibers are mainly composed of cellulose, hemicelluloses and lignin. The main advantage of employing natural fibers is that these are biodegradable and renewable and exhibit low cost, low density and high toughness. The proposed work focuses on the development of cellulose composites using Kenaf fibers. The kenaf plant (hibiscus cannabinus) belongs to Malvaceae family. In this work a study on the feasibility of extracting cellulose from plant fiber will be carried out by a chemical procedure, water pre hydrolysis. The composites will be prepared by using cellulose by using hand-layup technique. The composites are characterized by means tensile test based on ASTM standard.
Film production with groundnut extraction cake and its physico-mechanical pro...AI Publications
The edible films have been produced from protein containing foods especially nuts by casting process and no available researches found on using the extracted proteins in dried extraction cake of groundnut seed.The aim of this research was to get an edible film from dried extraction cake of groundnut seed and to characterise their physico-mechanical, optical and barrier permeabilities with different concentration of alkali solution (NaOH). The films presented high values of L* (average as 84.8) in terms of lightness.The tensile strength (MPa) and elongations at break (%) decresed with increase in alkali solution. The alkali solutions increased the water vapour permeabilites (WVP) but decreased oxygen permeabilites (OP) of the films. The protein fraction of extraction cake of groundnut seeds showed the potential to be processable into the edible films. Arginine (Arg) and cysteine (Cys) were the major amino acids in the films.The produced films were used to package olive oil for 60 days of storage at room temperature.The peroxide values of olive oil increased less that conditioned in produced films and good barrier plastic material (PP) during storage period.The films improved the olive oil chemical stability and it showed suitable film properties.
The development of sustainable bioplastics for new applications in packaging ...Agriculture Journal IJOEAR
Abstract— The advantage of biodegradable plastics is their degradation under the influence of biological systems into substances naturally present in the environment, which are then placed in a natural circulation cycle of matter. Moreover, the biodegradable plastics waste not require additional segregation and separation from households, and are collected together with other organic waste and subjected to recycling under aerobic or anaerobic conditions. Use of bioplastics reduces the harmful effects of waste on the environment, but does not eliminate it completely.
The article presents the results of (bio) degradation studies under industrial and laboratory (MicroOxymax) composting conditions as well as at atmospheric conditions of commercial disposable dishes from the Nature Works® PLA. Were also carried out investigation of abiotic degradation under laboratory conditions. It was found, from the macro- and microscopic observations, that the tested cups (bio) degraded in the selected environments, wherein in a greater extent under industrial composting conditions than in MicroOxymax. The GPC results, which show significantly reduce in the molar mass of the tested samples after specified incubation times in all environments, indicates that the hydrolytic degradation process occurs predominantly.
Introduction
Types of Biodegradable plastic
Renewable resources
Non-renewable
Other biodegradable plastics
Properties of biodegradable plastics
Mechanism of Biodegradation of plastics
Factors affecting biodegradation
Applications of Biodegradable plastics
Advantage of biodegradable plastic
Disadvantage of biodegradable plastic
Conclusion
References
Effect of addition of polyethylene glycol (peg) as plasticizer on edible film...Nabila298243
Gelatin is a type of protein extracted from animal collagen tissue found in animal skin, bones and ligaments or connective tissue. Gelatin has high digestibility properties therefore it has the potential to be the raw material for making edible films. The edible film is a thin layer produced from edible materials. Edible films can be formed from three types of constituent materials, such as hydrocolloids, lipids, and mixtures/composites of the two. Several types of hydrocolloids that are able to make edible films are proteins (gelatin). The test parameters include tensile strength, elongation, thickness, water vapour transmission rate, moisture content and amino acid profile. PEG in edible films is a useful plasticizer to reduce the stiffness of the polymer. The best edible film from milkfish skin gelatin was obtained at a concentration of 1% polyethylene glycol plasticizer with physicochemical characteristics including tensile strength of 11.94 MPa, elongation of 2.55%, thickness of 0.10 mm, water vapour transmission rate of 159.36 g/m2/day and water content of 16.03% with the highest amino acid content, namely Glycine at 172021.41 mg/kg and the lowest, namely L-Tyrosine at 4333.40 mg/kg.
Water Absorption, Thickness Swelling and Rheological Properties of Agro Fiber...iosrjce
IOSR Journal of Polymer and Textile Engineering (IOSR-JPTE) is ambitious to disseminate information and experience in education, practice and investigation between polimer, fibric and all the sciences involved in textile.
It's about synthesis of bioplastic. specifically about PHA and bioplastic synthesis from red algae. It was completed under guidance of Mr. Abdul Shafiullah, Lecturer SSC, Shimoga
"𝑩𝑬𝑮𝑼𝑵 𝑾𝑰𝑻𝑯 𝑻𝑱 𝑰𝑺 𝑯𝑨𝑳𝑭 𝑫𝑶𝑵𝑬"
𝐓𝐉 𝐂𝐨𝐦𝐬 (𝐓𝐉 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬) is a professional event agency that includes experts in the event-organizing market in Vietnam, Korea, and ASEAN countries. We provide unlimited types of events from Music concerts, Fan meetings, and Culture festivals to Corporate events, Internal company events, Golf tournaments, MICE events, and Exhibitions.
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⭐ 𝐅𝐞𝐚𝐭𝐮𝐫𝐞𝐝 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬:
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➢ WOW K-Music Festival 2023
➢ Winner [CROSS] Tour in HCM
➢ Super Show 9 in HCM with Super Junior
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"𝐄𝐯𝐞𝐫𝐲 𝐞𝐯𝐞𝐧𝐭 𝐢𝐬 𝐚 𝐬𝐭𝐨𝐫𝐲, 𝐚 𝐬𝐩𝐞𝐜𝐢𝐚𝐥 𝐣𝐨𝐮𝐫𝐧𝐞𝐲. 𝐖𝐞 𝐚𝐥𝐰𝐚𝐲𝐬 𝐛𝐞𝐥𝐢𝐞𝐯𝐞 𝐭𝐡𝐚𝐭 𝐬𝐡𝐨𝐫𝐭𝐥𝐲 𝐲𝐨𝐮 𝐰𝐢𝐥𝐥 𝐛𝐞 𝐚 𝐩𝐚𝐫𝐭 𝐨𝐟 𝐨𝐮𝐫 𝐬𝐭𝐨𝐫𝐢𝐞𝐬."
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Pumpkin.pdf
1. IOP Conference Series: Materials Science and Engineering
PAPER • OPEN ACCESS
Bioplastic from Chitosan and Yellow Pumpkin
Starch with Castor Oil as Plasticizer
To cite this article: M Hasan et al 2018 IOP Conf. Ser.: Mater. Sci. Eng. 333 012087
View the article online for updates and enhancements.
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International Conference on Advanced Materials for Better Future 2017 IOP Publishing
IOP Conf. Series: Materials Science and Engineering 333 (2018) 012087 doi:10.1088/1757-899X/333/1/012087
Bioplastic from Chitosan and Yellow Pumpkin Starch with
Castor Oil as Plasticizer
M Hasan1
, R F I Rahmayani1
, Munandar1
Department of Chemistry Education, Faculty of Teacher Training and Education,
Syiah Kuala University, Darussalam Banda Aceh 23111
E-mail: muhammadhasan.kimia@unsyiah.ac.id
Abstract. This study has been conducted on bioplastic synthesis of chitosan and yellow
pumpkin starch (Cucurbita moschata) with castor oil as plasticizer. The purpose of this study is
to determine the characteristics of the effect of chitosan and starch composition of pumpkins
against solvent absorption, tensile strength and biodegradable. The first stage of the research is
the making of bioplastic by blending yellow pumpkin starch, chitosan and castor oil. Further, it
tested the absorption capacity of the solvent, tensile strength test, and biodegradable analysis.
The optimum absorption capacity of the solvent is obtained on the composition of
Pumpkin/Chitosan was 50/50 in H2O and C2H5OH solvent. Meanwhile the optimum
absorbency in HCl and NaOH solvents is obtained by 60/40 composition. The characterization
of the optimum tensile strength test was obtained on the 40/60 composition of 6.787 ± 0.274
Mpa and the fastest biodegradation test process within 5-10 days occurred in the 50/50
composition. The more chitosan content the higher the value of tensile strength test obtained,
while the fastest biodegradation rate occureds in the composition of yellow pumpkin starch and
chitosan balanced 50:50.
1. Introduction
The use of plastic from petrochemical ingredients tends to increase. The Plastics have been used for
various needs, such as food packaging, bottle drinks, and various household appliances and toys.
Plastics from petrochemical raw materials can not be degraded either by the influence of solar
radiation or microbial decomposers [1]. As a result, plastic waste from these products is also
increasing along with the increasing use of plastic products, especially plastic as a packing material.
Possible solutions to this problem have been given, such as recycling scrap plastic and burning plastic
waste. Recycle plastic waste is difficult to obtain products with the same strength as plastic of origin
because it is difficult to separate the plastic which is from the type of polymer. Burning plastic is also
not a wise move, because it can cause air pollution due to the production of toxic gases, such as
cyanide gas, chlorine, and carbon monoxide gas [2].
Other efforts continue to be encouraged is the synthesis of biodegradable plastics, namely strong
plastic when used and immediately biodegradable or damaged when thrown away as garbage. In
addition, the expected biodegradable plastic characteristics are that the resulting biodegradation
product is not toxic to the environment. Synthesis of biodegradable plastics can be done through a
number of alternatives, including copolymerization [3], biosynthesis [4], and poliblending between
natural polymers and synthetic polymers [5-6]. Copolymerization is a chemical microstructure
modification. This method has been able to create a variety of polymers as raw material for
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International Conference on Advanced Materials for Better Future 2017 IOP Publishing
IOP Conf. Series: Materials Science and Engineering 333 (2018) 012087 doi:10.1088/1757-899X/333/1/012087
biodegradable plastics, but considered less economical. Biosynthesis is a plastic synthesis by utilizing
microbes. The disadvantage is that in addition to the resulting low yield of plastic is also difficult to
regulate the resulting polymer chain structure, so the properties of plastic produced is usually difficult
to control. The biodegradable plastic synthesis of highly economically viable prospects is through
blending of natural polymers, in addition to being biodegradable in nature the polymer feedstock is
readily available and renewable. A lot of very up-to-date research has been developed to ecologically
friendly plastics through natural polymer blending. The environmentally friendly plastics through corn
starch blending and thermoplastic chitosan have been synthesized [7]. The results show that the plastic
film obtained has good thermal endurance, although the mechanical properties of polyblend are lower
than the original chitosan. Futhermore, bioplastics can be obtained through blending of Polylactic acid
and Poly-3-hydroxybutyrate [8]. The resulting polyblend show an increase in elongation at break. This
characteristic is indispensable for plastic films, especially those used as food packaging.
Totally biodegradable plastics have been synthesized through blending of tapioca starch and
chitosan with plasticizer from palm oil [9]. The results show that, in addition to being biodegradable,
the polymer may be prepared in the form of films that can be used for food packaging. Other
publication also reported the synthesis of poly (urethane-esters) of the lactone polyester prepolymer,
and the resulting polymer is biodegradable [10]. Until now there has been limited publication about
bioplastics from local raw materials of Aceh Province, such as pumpkin, taro, and others. Therefore,
this research focuses on making bioplastic through blending of chitosan and starch from Aceh local
raw material, that is from yellow pumpkin starch by using castor oil as natural plasticizer. The result
of this research will contribute to the knowledge gap in the literature.
2. Experimental
2.1 Materials and equipment
The materials used in this study were yellow pumpkin starch, chitosan, castor oil, ethanol , sodium
hydroxide pH 10, hydrochloride acid pH 5, acetic acid 5%, microbial Pseudomonas aeruginosa,
nutrients agar (NA), Aquades, aluminum foil. The tools used in this research are glassware, hotplate,
analytical scales, petri dish, tensile test equipment (IK Force Tester MCT-2150), needle, oven, spirit
burner, laminar flow and autoclave.
2.2 Methods
2.2.1 Preparation of pumpkin yellow starch. Pumpkin fruit is firstly cleaned and separated from the
hard skin and seeds. Then, it is washed using water to remove the fruit juice which is located in the
middle of the pumpkin fruit. The next process is the pumpkin fruit is cut in small piece and adding
enough water. Then it is blended until it becomes mush. The yellow pumpkin pulp that has been
obtained is then filtered and allowed to stand for 50 minutes, to get the precipitate. After sterilizing for
50 minutes, the sediment still mixes with the water is filtered back so as to obtain wet starch
deposition. The wet starch deposition is dried by an oven to obtain starch which is ready for use as a
bioplastic feedstock.
2.2.2 Bioplastic synthesis. Bioplastic synthesis was performed by weighing chitosan and yellow
Pumpkin starch with varying predetermined mass (Table 1). Then the chitosan is dissolved into 5%
acetic acid while stirring with a magnetic stirrer. The same thing is also applied on yellow pumpkin
starch until all the starch dissolves. Both solutions are mixed in a beaker and added with 15% of castor
oil. After the sample begins to form the gel, the sample is poured into the mold and dried over the
hotplate at 75 ° C until all the solvents evaporate and plastic films are obtained.
2.2.3 Tensile test. Bioplastic samples were cut to lengths of 4 cm and 1 cm wide. The measurement
condition is a tensile velocity of 100 mm / min with a maximum load of 500 N. The sample is clamped
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International Conference on Advanced Materials for Better Future 2017 IOP Publishing
IOP Conf. Series: Materials Science and Engineering 333 (2018) 012087 doi:10.1088/1757-899X/333/1/012087
Table 1. Experimental Design on Bioplastic Synthesis
Code Chitosan/starch (%) Chitosan mass (g) Starch mass (g) Total mass (g)
CP46 40/60 0.56 0.84
0.70
0.56
1.40
CP55 50/50 0.70 1.40
CP64 60/40 0.84 1.40
on a tensile test apparatus, and runs the apparatus according to a predetermined condition until the
sample is disconnected. Repeated procedure above for each sample is done 3 times tensile test.
Recorded tensile test results are presented in the form of tables between tensile strength and extension.
The magnitude of the breaking strength of a material depends on the amount of loading applied and
the cross section of the material itself according to the following formula:
(1)
where σ = strength (Mpa), F = load at break (N), A = the cross-sectional of the polymer material
(mm2
). While Young Modulus determined using the following formula.
Young Modulus (Mpa) = (2)
3-3)
where ɛ = elongation at break, = the difference between the length at break, and = the initial
length.
2.2.4 Solvent uptake test. This test is based on the method performed by Pimpan, et al., 2001. Plastic is
cut to the size of 1.0 cm x 1.0 cm. The plastic that has been cut is then weighed with an analytical
balance sheet. The plastic is put into a 10 ml beaker filled with 5 ml solvent, then sterilized in room
temperature. Every minute, the plastic is taken, the solvent on the plastic surface is wiped with a
tissue, then weighed. The absorption capacity of the solvent is calculated using the following formula:
Solvent uptake = x 100% (3)
where: W0 = weight of dry sample while W = weight of sample after immersion in the solvent
2.2.5 Biodegradation test. Bioplastic samples were cut to 1 x 1 cm size then sterilized using UV light
in the laminar flow for 20 minutes. Sterilized bioplastic samples were incorporated into the
biodegradation medium then incubated for 5, 10, 15 and 20 days
3. Result and Discussion
3.1 Bioplastic film
Bioplastic film obtained in this study is shown in Figure 1, which is a colored plastic film from light
yellow to orange. The resulting of film color depended greatly on the composition of the pumpkin
starch and chitosan. The color of bioplastic with a composition of at least 40% chitosan looks darker
than the other two variations of bioplastic variation. This is influenced by the pigment base yellow
pumpkin starch. The appearance of color pigment caused by starch used has not undergone bleacing
and purification process.
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International Conference on Advanced Materials for Better Future 2017 IOP Publishing
IOP Conf. Series: Materials Science and Engineering 333 (2018) 012087 doi:10.1088/1757-899X/333/1/012087
Figure 1. Film bioplastic from pumpkin yellow starch and
chitosan: (a) CP46, (b) CP55, (c)CP64
3.2 Solvent uptake.
Solvent uptake test is carried out to determine the resistance of a bioplastic sample to some type of
solvent. The lyophobicity test is performed by weighing the bioplastic mass before and after
dissolvedinto the solvent. The solvents used in this study were H2O, C2H5OH, HCl, and NaOH. The
observed results of the solvent absorption by bioplastics are shown in Table 2.
Table 2. Absorption capability bioplastic ilm On Various solvents
code
composition Quantity absorption(%)
chitosan/starch H2O C2H5OH HCl (pH=5)
NaOH
(pH=10)
CP46 40/60 13.903 0.258 22.032 19.451
CP55 50/50 8.833 0.214 11.333 12.047
CP64 60/40 9.628 0.485 10.771 9.914
Based on the data in Table 2, the lowest absorption capacity of H2O and CH3COOH solvents was
produced by bioplastic films at a 50/50 composition. While the lowest absorption capacity of HCl and
NaOH solvents is produced by 60/40 bioplastic film. This is due to the basic nature of chitosan that is
hydrophobic, so that in a balanced composition between starch and chitosan cause molecular
interactions that can decrease the hydrophilic nature of starch [11]. In the HCl and NaOH solvents, the
highest adsorption capacity of the solvent is produced by the film on bioplastic variations in which the
more yellow squash starch content. It is caused by hydrophilic amylose so easily soluble in water,
strong base solution, slightly soluble in dilute acid [12].
3.3 Tensile test
The tensile strength of the film is a specific strength obtained from the maximum pull before
breaking/tearing. This measurement is to determine the magnitude of force required to reach the
maximum pull point on every surface area of the film. The result of tensile strength test from
bioplastic of pumpkin starch can be seen in Table 3.
Table 3. Tensile strength, elastisity, and young modulus of bioplastic film
No chitosan/starch
Tensile strength
(Mpa)
Elongation
(%)
Young modulus
(Mpa)
1 40/60 6.787 ±0.274 13.451 ±3.709 6.093
2 50/50 2.912 ±0.470 13.278 ±4.413 2.176
3 60/40 2.563 ±1.055 7.285 ±1.135 5.263
Based on the data in Table 3, the tensile strength of bioplastic samples is influenced by the
variation of the composition of yellow pumpkin starch and chitosan, where the highest tensile strength
(a) (b) (c)
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International Conference on Advanced Materials for Better Future 2017 IOP Publishing
IOP Conf. Series: Materials Science and Engineering 333 (2018) 012087 doi:10.1088/1757-899X/333/1/012087
is found in the composition of starch/chitosan 40/60 of 6.787 Mpa. While the lowest tensile strength is
in the 60/40 composition of 2.563 Mpa. Based on the results of this tensile test, it showed that the
composition of chitosan is very influential on the increase value of tensile strength bioplastik starch
pumpkin produced. This is due to the greater chitosan composition that encourages the formation of
hydrogen bonds with stronger starch molecules [13].
Young modulus is the ratio between the tensile strength at break of the extension. The lower the
modulus of young value the more elastic the bioplastic samples are tested and vice versa if the higher
the modulus of young value the less the elasticity value and the tensile strength value is very high [14].
Bioplastic samples with the best elasticity are 50/50 compositions of 2.076 MPa. This is triggered by
the peak stress on the strain at break (mm), the lower the peak load and the value of the strain value at
breaks are greater the more elastic the bioplastic is produced. The graph of tensile test results by using
the tool IK Force Tester MCT-2150 can be seen in Figure 2.
Figure 2. Tensile test graph, (A) CP46, (B) CP55 and
(C) CP64
Based on Figure 2, the value of young modulus is greatly influenced by the chitosan content in the
bioplastic film. The higher the chitosan content the modulus young value is also higher. The plastic
film of the results of this study is better with the results achieved by publication on the manufacture of
plastic films of corn starch and chitosan with a composition of 50/50, resulting from a modulus young
value of 105 Mpa [15]
3.4 Biodegradation test
Biodegradation test is done by incubating bioplastic film in culture medium of pseudomonas
aeruginosa. The film is incubated within a period of 5 days to 20 days. The surface of the
biodegradation film at various time ranges is presented in figure 3. Based on figure 3, it is seen that the
sample began to change after 5 days incubation in psedomonas aeruginosa media. After 10 days of
incubation seen in the media there has been a change of color, especially films with more starch
content. After a 30-day biodegradation process, the film has been totally biodegradable, where the film
is difficult to separate from the media due to damage. Films with larger starch content are easier to
biodegradable. This is due to the presence of glucosidic bonds in the amylose and amylopectin units.
The existence of this bond causes the starch molecules more easily biodegraded through hydrolyzed
mechanisms.
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International Conference on Advanced Materials for Better Future 2017 IOP Publishing
IOP Conf. Series: Materials Science and Engineering 333 (2018) 012087 doi:10.1088/1757-899X/333/1/012087
Figure 3. Biodegradation
film: a = CP46 sample, b=
CP55 sample, c = CP64,
where the number of 0, 1, 2,
3, and 4 refers to before
biodegradation, after 5 days
biodegradation, after 10 days
biodegradation, after 15 days
biodegradation, and 20 days
biodegradation
4. Conclusion
Bioplastics of yellow pumpkin and chitosan have been successfully synthesized by polblending
pathway and its can be printed in the form of thin films. The resulting film has a biodegradable
characteristic for 20 days incubation in the medium of psedumonas aeruginosa. The mechanical
properties of bioplastics are highly determined by the composition of starch and chitosan, where the
higher the chitosan content, the value of tensile strength and modulus of young increases. The
adsorption capacity of water solvent, hydrochloric acid and sodium hydroxide is higher with the
increase of starch content in plastic composition.
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International Conference on Advanced Materials for Better Future 2017 IOP Publishing
IOP Conf. Series: Materials Science and Engineering 333 (2018) 012087 doi:10.1088/1757-899X/333/1/012087
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