1. S.Kirubanandan
Ph.D. Student
7th September 2018, BAMI Industrial Chapter, Bioprocessing Resource Institute of Australia,
Department of Chemical Engineering, Monash University
ENGINEERING NANO-CELLULOSE FILMS AND
ITS COMPOSITIES
VIA
SPRAY COATING
Supervisors: Warren Batchelor, Gil Garnier and
Swambabu Varanasi
5. APPLICATIONS OF NANOCELLULOSE
Packaging1 Oil and water separation2 Photo catalyst3
Gels for
Biomedical
Applications5
Nanocellulose
based composites6
Nanocomposites as High
Performance Barrier7
Membrane4
1. K.Shanmugam et al, Cellulose, 2017,24, 7, 2669–2676.
2. Z. he et al, RSC Adv., 2016, 6, 21435-21438
5. Mendoza et al, J Colloid Interface Sci. 2018 1;509:39-46.
7. U.M. Garusinghe et al, Colloids and Surfaces A,540, 2018,233-241.
3. U.M. Garusinghe et al, Scientific Reports, 8, 2306 (2018)
4. V. Swambabu et al , Chemical Engineering Journal 265(1) 2015.
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6. GAPS IN KNOWLEDGE
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1. Can we spray NC on a impermeable surface?
2. Can we the tailor properties of NC film with the process
variables?
3. Can we recycle the NC film?
4. Do nanoparticles affect on the properties of NC film?
5. How do we control/minimize the smoothness of the film?
16. Nanocellulose – Potential Barrier
• Bio degradable
• Non toxic
• Extreme High Surface Area
• Crystallinity
• Tuneable surface for
functionalization
Martin Hubbe et al, Nano cellulose in Packaging: A Review, Bio Resources 12(1), 2143-2233.
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17. Overview of Barrier Materials
Aulin and Lindström, Biopolymer Coatings for Paper and Paperboard, John Wiley & Sons, Ltd, 2011, pp. 255-276
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18. CH. 4 RECYCLING OF SMOOTH NC FILMS
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Before Recycling
After Recycling
19. BARRIER PROPERTIES OF NC FILM
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Spray coated NC Film < 0.003 µm/Pa.S
Recycled sheet (Vaccum Filtration) - 0.0045 µm/Pa.S
0
2E-11
4E-11
6E-11
8E-11
1E-10
1.2E-10
1.4E-10
1.6E-10
0.6 0.65 0.7 0.75 0.8 0.85 0.9
Watervapourpermeability
g.m-1.s-1Pa-1
Apparent Density (g.m-3 x 10-6 )
Spray coating
Vaccum Filtration
Recycled sheet
Air Permanence Water vapour
Permeability
20. CH 4 -OUTCOME
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Low permeance of air and water vapour
Retained 80% of the tensile strength
Recycled NC film shows limited reductions in barrier
performance
Pathway for sustainability
21. Effect of Inorganics Addition
Müller, Kerstin (2017). Nanomaterials. 7. 47. 10.3390/nano7040074.U.M. Garusinghe et al, Colloids and Surfaces A,540, 2018,233-241.
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22. Preparation of Nanocomposite via spraying
Nano clay Solution and
Nanocellulose
Preparation
Nanocellulose
Nano clay –
Nanocellulose (Raw
Diacel KY 100S)
Composites
Nano clay –
Nanocellulose
(Homogenised 2 passes)
Composites
Without Homogenization
With Homogenization
Disintegrator Spray Coating
NC- Closite Na++ (MMT)
Suspension
2 Pass
˜ 800-1000 Bar
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24. Effect of Nano clay addition on WVP ( After Homogenization)
R² = 0.8283
R² = 0.9988
R² = 0.9975
R² = 0.9772
0
0.5
1
1.5
2
2.5
3
3.5
4
0 5 10 15 20 25 30 35
Watervaporpermeabilityx1011(g/Pa.s.m)
Nanoclay Loading (%)
Closite Na+
Nanocomposite Na via Vaccum Filtration
Nanocomposite Na via Vaccum Filtration after Homo
Nanocomposite via spraying after Homo
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25. SEM MICROGRAPHS
Spray Coated NC film (Homo) Spray Coated 30 % MMT –NC (Homo) Composites
Spray Coated 30 % MMT –NC (unhomo) CompositesSpray Coated NC film (unhomo)
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26. Works to be performed
• Surface Roughness at nanoscale thro Optical
Profilometry
• Surface Roughness at micro scale via Parker Print
Surface Instrument
• AFM Investigation of Nanocomposites
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27. CH. 6 –TUNING SURFACE ROUGHNESS
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Objective: Tuning surface
roughness
what parameters controls the
roughness of the NC films
Base surface (or)
Fibre Diameter
To prepare smooth nanocellulose
films
Super Mirror Stainless
Steel Plate
Silicon wafers
Normal Stainless Steel
Plate
Aluminium Foil
Different Base surface
28. 28
APPLICATION OF SMOOTH NC FILMS
NC films for printed
electronics
Smoothness on printing of
RFID circuits on the NC film
Use of nanocellulose in printed electronics: a
review (Fanny Hoeng et al., 2016)
30. ACKNOWLEDGEMENT
• Assoc Prof. Warren Batchelor and Prof. Gil Garnier
• Dr. Swambabu Varanasi, Asst. Prof, IIPE, India.
• Dr. Vikram Raghuwanshi, Research Fellow, BIOPRIA,
Monash Uni.
• Student friends and Staff members at BioPRIA
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