Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films

The chitosan (CS)/corn cob (CC) biocomposite films were prepared via solvent casting method. The effects of CC content, crosslinking agents such as glutaraldehyde (GLA), salicylaldehyde (SAL), epichlorohydrin (EP) and phthalic anhydride (PTH), and chemical modification of CC with acrylic acid (AA) o...

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Format:	Thesis
Language:	English
Subjects:	Composite materials Protein Electron beam Chitin Corncorb
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/4/Chang%20Min%20Y.pdf
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spelling	my-unimap-772062022-11-25T01:34:38Z Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films Salmah, Husseinsyah, Assoc. Prof. Ir. Dr. The chitosan (CS)/corn cob (CC) biocomposite films were prepared via solvent casting method. The effects of CC content, crosslinking agents such as glutaraldehyde (GLA), salicylaldehyde (SAL), epichlorohydrin (EP) and phthalic anhydride (PTH), and chemical modification of CC with acrylic acid (AA) on tensile properties, thermogravimetric analysis (TGA), morphology study, gel fraction and biodegradation properties of CS/CC biocomposite films were investigated. The effect of electron beam irradiation on properties of unmodified and modified CS/CC biocomposite films were also studied. The results indicated that the tensile strength, elongation at break, Tonset, Tdmax and residue of unmodified CS/CC biocomposite films decreased as increases of CC content. However, the modulus of elasticity, gel fraction, weight loss of enzymatic and soil biodegradation of unmodified biocomposite films increased with increasing CC content. The morphology of unmodified biocomposite films showed poor CC dispersion and interfacial interaction in CS matrix. The effect of different crosslinking agents such as GLA, SAL, EP and PTH in biocomposite films have higher tensile strength, modulus of elasticity, Tonset, Tdmax, and residue in comparison with unmodified biocomposite films. The gel fraction of all modified biocomposite films higher than unmodified biocomposite films. Whereas, the modified biocomposite films exhibited decrement in elongation at break and weight loss of both enzymatic and soil biodegradation. The treated CC with AA improved the tensile strength, elongation at break, Tdmax and char residue of biocomposite films, but reduced the modulus of elasticity and weight loss in enzymatic and soil biodegradation of biocomposite films. The gel fraction of treated biocomposite films with AA was slightly improved. The SEM micrograph of all modified biocomposite films showed better filler dispersion and adhesion in CS matrix. The tensile strength, modulus of elasticity and Tonset, Tdmax of irradiated modified CS/CC biocomposite films with SAL was higher than unirradiated biocomposite films. Meanwhile, the residue of irradiated modified biocomposite films with SAL reduced when the temperature up to 500 oC. The weight loss of both enzymatic and soil biodegradation of irradiated biocomposite films were lower than unirradiated biocomposite films. The morphology of irradiated modified biocomposite films indicated brittle surface. The FTIR spectra of all modified biocomposite films showed the changes in functional groups in all modified biocomposite films. From all chemical modifications, the irradiated modified CS/CC bicomposite films with SAL showed the highest tensile strength, modulus of elasticity, gel fraction, Tonset and Tdmax. The elongation at break and weight loss of enzymatic and soil biodegradation of irradiated modified biocomposite films with SAL were the lowest compared to others modified biocomposite films. Universiti Malaysia Perlis (UniMAP) Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77206 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/1/Page%201-24.pdf ca51302d1ebad4474908c9be38043050 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/2/Full%20text.pdf bc9c33ef74e2f15acc263b7824695dcf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/4/Chang%20Min%20Y.pdf 7dfdd073dc99f95705159d4e3b277008 Universiti Malaysia Perlis (UniMAP) Composite materials Protein Electron beam Chitin Corncorb School of Materials Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Salmah, Husseinsyah, Assoc. Prof. Ir. Dr.
topic	Composite materials Protein Electron beam Chitin Corncorb
spellingShingle	Composite materials Protein Electron beam Chitin Corncorb Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films
description	The chitosan (CS)/corn cob (CC) biocomposite films were prepared via solvent casting method. The effects of CC content, crosslinking agents such as glutaraldehyde (GLA), salicylaldehyde (SAL), epichlorohydrin (EP) and phthalic anhydride (PTH), and chemical modification of CC with acrylic acid (AA) on tensile properties, thermogravimetric analysis (TGA), morphology study, gel fraction and biodegradation properties of CS/CC biocomposite films were investigated. The effect of electron beam irradiation on properties of unmodified and modified CS/CC biocomposite films were also studied. The results indicated that the tensile strength, elongation at break, Tonset, Tdmax and residue of unmodified CS/CC biocomposite films decreased as increases of CC content. However, the modulus of elasticity, gel fraction, weight loss of enzymatic and soil biodegradation of unmodified biocomposite films increased with increasing CC content. The morphology of unmodified biocomposite films showed poor CC dispersion and interfacial interaction in CS matrix. The effect of different crosslinking agents such as GLA, SAL, EP and PTH in biocomposite films have higher tensile strength, modulus of elasticity, Tonset, Tdmax, and residue in comparison with unmodified biocomposite films. The gel fraction of all modified biocomposite films higher than unmodified biocomposite films. Whereas, the modified biocomposite films exhibited decrement in elongation at break and weight loss of both enzymatic and soil biodegradation. The treated CC with AA improved the tensile strength, elongation at break, Tdmax and char residue of biocomposite films, but reduced the modulus of elasticity and weight loss in enzymatic and soil biodegradation of biocomposite films. The gel fraction of treated biocomposite films with AA was slightly improved. The SEM micrograph of all modified biocomposite films showed better filler dispersion and adhesion in CS matrix. The tensile strength, modulus of elasticity and Tonset, Tdmax of irradiated modified CS/CC biocomposite films with SAL was higher than unirradiated biocomposite films. Meanwhile, the residue of irradiated modified biocomposite films with SAL reduced when the temperature up to 500 oC. The weight loss of both enzymatic and soil biodegradation of irradiated biocomposite films were lower than unirradiated biocomposite films. The morphology of irradiated modified biocomposite films indicated brittle surface. The FTIR spectra of all modified biocomposite films showed the changes in functional groups in all modified biocomposite films. From all chemical modifications, the irradiated modified CS/CC bicomposite films with SAL showed the highest tensile strength, modulus of elasticity, gel fraction, Tonset and Tdmax. The elongation at break and weight loss of enzymatic and soil biodegradation of irradiated modified biocomposite films with SAL were the lowest compared to others modified biocomposite films.
format	Thesis
title	Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films
title_short	Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films
title_full	Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films
title_fullStr	Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films
title_full_unstemmed	Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films
title_sort	effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Materials Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77206/4/Chang%20Min%20Y.pdf
_version_	1776104249991626752

Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films

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