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Bioactions, Bioworld #scichallenge2017

#scichallenge2017

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Bioactions, Bioworld #scichallenge2017

  1. 1. Biodegradability study Samples preparationAbstract The aim of this project was the production and characterization of a biodegradable biopolymer, using starch as raw material. Different weight percentages of glycerine were used, and the influence of this variable on the properties of the polymer produced was studied. The biopolymer produced was characterized in terms of degradation rate and composting potential. Density, porosity and mechanical strength were also determined. The thermal weldability was also subject of study, as well as its potential of application as fruit coating or as matrix for ceramic capacitors. BioActions, BioWorld Production and characterization of a biodegradable biopolymer João Pedro Carvalho1, Susana Devesa2 1 Class A - 11th grade, Teacher2 Colégio da Imaculada Conceição, 3044-519, Cernache STARCH DISTILLED WATER GLYCERINE HEATING PROCESS COOLING AND CONSOLIDATION (a) (b) Figure 1 – Water degradation tests (a); Sample C in water after 4months (b). Figure 2 – Soil degradation tests (a); Evolution of the samples’ mass in time (b). Biopolymer characterization (Mechanical stress) Figure 3 – Mechanical stress tests. Figure 4 – Stress (a) and deformation (b) as function of glycerine mass percentage. Complementary applications Matrix for ceramic capacitors Fruit coating (a) (b) Figure 5 – Network analyzer (a) sample-holder with sample (b). 0 p A d C'   0pAR d ''   Figure 6 - ε' e ε'' as function of frequency. Figure 7 – Evolution of the bananas’ ripening process in time. Conclusion Polymer C presented higher soil degradation rate. The strength decreases with the glycerine increasing, with polymer A being the most resistant. All of the polymers can be thermally welded successfully. Polymer A showed promising results regarding the applicability as matrix for ceramic capacitors and as fruit coating. Acknowledgments Physics Department of the University of Aveiro Mechanical Engineering Department of ISEC. “Prémio Ciência na Escola” of Ilídio Pinho Foundation. HEATING PROCESS (a) (b)

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#scichallenge2017

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