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

Doctor of Philosophy in Materials Engineering

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Bibliographic Details
Main Author: Chan, Ming Yeng
Other Authors: Salmah, Husseinsyah, Assoc. Prof. Ir. Dr.
Format: Thesis
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2015
Subjects:
Composite materials
Protein
Electron beam
Chitin
Corncorb
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77206
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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 Chan, Ming Yeng Salmah, Husseinsyah, Assoc. Prof. Ir. Dr. Composite materials Protein Electron beam Chitin Corncorb Doctor of Philosophy in Materials Engineering 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. 2015 2022-11-25T01:33:24Z 2022-11-25T01:33:24Z Thesis http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77206 en Universiti Malaysia Perlis (UniMAP) Universiti Malaysia Perlis (UniMAP) School of Materials Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Composite materials
Protein
Electron beam
Chitin
Corncorb
spellingShingle Composite materials
Protein
Electron beam
Chitin
Corncorb
Chan, Ming Yeng
Effect of chemical modifications and electron beam irradiation on properties of corn cob filled chitosan biocomposite films
description Doctor of Philosophy in Materials Engineering
author2 Salmah, Husseinsyah, Assoc. Prof. Ir. Dr.
author_facet Salmah, Husseinsyah, Assoc. Prof. Ir. Dr.
Chan, Ming Yeng
format Thesis
author Chan, Ming Yeng
author_sort Chan, Ming Yeng
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
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2015
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77206
_version_ 1753972994803236864
score 13.214268

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