Preparation, Characterization And Slow-Release Properties Of Biocomposites Comprising Chitosan Encapsulated In Natural Rubber Matrices

Projek penyelidikan ini terdiri daripada dua bahagian. Pada bahagian pertama, kesan pH ke atas kestabilan gel chitosan berasid (CTSAc) bersama 1-Naftol (produk dilabelkan sebagai CTSAc/1-N) atau 2-Naftol (produk dilabelkan sebagai CTSAc/2-N) ditentukan. Dalam air berasid (pH ≤ 4), CTSAc/1-N atau CTS...

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Main Author:	Abu, Norhidayah
Format:	Thesis
Language:	English
Published:	2016
Subjects:	QD1-999 Chemistry
Online Access:	http://eprints.usm.my/32232/1/NORHIDAYAH_BINTI_ABU_24%28NN%29.pdf
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spelling	my-usm-ep.322322019-04-12T05:25:17Z Preparation, Characterization And Slow-Release Properties Of Biocomposites Comprising Chitosan Encapsulated In Natural Rubber Matrices 2016-07 Abu, Norhidayah QD1-999 Chemistry Projek penyelidikan ini terdiri daripada dua bahagian. Pada bahagian pertama, kesan pH ke atas kestabilan gel chitosan berasid (CTSAc) bersama 1-Naftol (produk dilabelkan sebagai CTSAc/1-N) atau 2-Naftol (produk dilabelkan sebagai CTSAc/2-N) ditentukan. Dalam air berasid (pH ≤ 4), CTSAc/1-N atau CTSAc/2-N membentuk gel dan pecah dengan mudah. Dalam air neutral (pH ≈ 7), CTSAc/1-N dan CTSAc/2-N membentuk gel tetapi masih kelihatan utuh walaupun selepas dua minggu. Dalam air beralkali (pH ≥ 9), CTSAc/1-N dan CTSAc/2-N sukar membentuk gel walaupun selepas direndam selama tiga bulan. Selain itu, biokomposit tanpa naftol yang terdiri daripada CTSAc terkandung dalam getah asli tak tersilang ({CTSAc}NRucl) dan getah asli tersilang ({CTSAcl}NRc) disediakan. Kajian pengambilan air oleh NRucl, NRcl, {CTSAc}NRucl dan {CTSAc}NRcl telah dikaji. Daripada kajian ini, jumlah peratusan air dalam NRcl, NRucl, {CTSAc}NRcl dan {CTSAc}NRucl selepas 48 jam didapati berjumlah 1.8%, 3.0%, 75% dan 131%, masing-masing. Pada bahagian kedua, biokomposit terdiri daripada CTSAc/1-N atau CTSAc/2-N dan terkandung dalam NRucl ({CTSAc/1-N}NRcl) atau dalam NRcl ({CTSAc/2-N}NRucl) disediakan. Semua bahan polimer dicirikan menggunakan kaedah spektroskopi FT-IR, TGA dan VPSEM. This research project consists of two parts. In the first part, we determined the stability of acidified chitosan (CTSAc) gel incorporated with known amounts of either 1-Naphthol (product designated as CTSAc/1-N) or 2-Naphthol (product designated as CTSAc/2-N) in water with different pH values. In acidified water (pH ≤ 4), CTSAc/1-N or CTSAc/2-N swelled tremendously and broke apart easily. In neutral water (pH ≈ 7), CTSAc/1-N and CTSAc/2-N swelled but remained intact even after two weeks. In alkalized water (pH ≥ 9), CTSAc/1-N and CTSAc/2-N hardly swelled even after being soaked for three months. In addition, biocomposites comprised of solely CTSAc encapsulated in uncrosslinked natural rubber ({CTSAc}NRucl) and crosslinked natural rubber ({CTSAc}NRcl) were prepared. From the water uptake study, the percentage amount of water in NRcl, NRucl, {CTSAc}NRcl and {CTSAc}NRucl after 48 h was found to be 1.8%, 3.0%, 75% and 131%, respectively. In the second part, biocomposites comprised of CTSAc/1-N or CTSAc/2-N encapsulated in NRucl ({CTSAc/1-N}NRucl or {CTSAc/2-N}NRucl) and in NRcl ({CTSAc/1-N}NRcl or {CTSAc/2-N}NRcl) were prepared. All polymeric materials were characterized by means of FT-IR spectroscopy, TGA and VPSEM. 2016-07 Thesis http://eprints.usm.my/32232/ http://eprints.usm.my/32232/1/NORHIDAYAH_BINTI_ABU_24%28NN%29.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kimia (School of Chemical Sciences)
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QD1-999 Chemistry
spellingShingle	QD1-999 Chemistry Abu, Norhidayah Preparation, Characterization And Slow-Release Properties Of Biocomposites Comprising Chitosan Encapsulated In Natural Rubber Matrices
description	Projek penyelidikan ini terdiri daripada dua bahagian. Pada bahagian pertama, kesan pH ke atas kestabilan gel chitosan berasid (CTSAc) bersama 1-Naftol (produk dilabelkan sebagai CTSAc/1-N) atau 2-Naftol (produk dilabelkan sebagai CTSAc/2-N) ditentukan. Dalam air berasid (pH ≤ 4), CTSAc/1-N atau CTSAc/2-N membentuk gel dan pecah dengan mudah. Dalam air neutral (pH ≈ 7), CTSAc/1-N dan CTSAc/2-N membentuk gel tetapi masih kelihatan utuh walaupun selepas dua minggu. Dalam air beralkali (pH ≥ 9), CTSAc/1-N dan CTSAc/2-N sukar membentuk gel walaupun selepas direndam selama tiga bulan. Selain itu, biokomposit tanpa naftol yang terdiri daripada CTSAc terkandung dalam getah asli tak tersilang ({CTSAc}NRucl) dan getah asli tersilang ({CTSAcl}NRc) disediakan. Kajian pengambilan air oleh NRucl, NRcl, {CTSAc}NRucl dan {CTSAc}NRcl telah dikaji. Daripada kajian ini, jumlah peratusan air dalam NRcl, NRucl, {CTSAc}NRcl dan {CTSAc}NRucl selepas 48 jam didapati berjumlah 1.8%, 3.0%, 75% dan 131%, masing-masing. Pada bahagian kedua, biokomposit terdiri daripada CTSAc/1-N atau CTSAc/2-N dan terkandung dalam NRucl ({CTSAc/1-N}NRcl) atau dalam NRcl ({CTSAc/2-N}NRucl) disediakan. Semua bahan polimer dicirikan menggunakan kaedah spektroskopi FT-IR, TGA dan VPSEM. This research project consists of two parts. In the first part, we determined the stability of acidified chitosan (CTSAc) gel incorporated with known amounts of either 1-Naphthol (product designated as CTSAc/1-N) or 2-Naphthol (product designated as CTSAc/2-N) in water with different pH values. In acidified water (pH ≤ 4), CTSAc/1-N or CTSAc/2-N swelled tremendously and broke apart easily. In neutral water (pH ≈ 7), CTSAc/1-N and CTSAc/2-N swelled but remained intact even after two weeks. In alkalized water (pH ≥ 9), CTSAc/1-N and CTSAc/2-N hardly swelled even after being soaked for three months. In addition, biocomposites comprised of solely CTSAc encapsulated in uncrosslinked natural rubber ({CTSAc}NRucl) and crosslinked natural rubber ({CTSAc}NRcl) were prepared. From the water uptake study, the percentage amount of water in NRcl, NRucl, {CTSAc}NRcl and {CTSAc}NRucl after 48 h was found to be 1.8%, 3.0%, 75% and 131%, respectively. In the second part, biocomposites comprised of CTSAc/1-N or CTSAc/2-N encapsulated in NRucl ({CTSAc/1-N}NRucl or {CTSAc/2-N}NRucl) and in NRcl ({CTSAc/1-N}NRcl or {CTSAc/2-N}NRcl) were prepared. All polymeric materials were characterized by means of FT-IR spectroscopy, TGA and VPSEM.
format	Thesis
qualification_level	Master's degree
author	Abu, Norhidayah
author_facet	Abu, Norhidayah
author_sort	Abu, Norhidayah
title	Preparation, Characterization And Slow-Release Properties Of Biocomposites Comprising Chitosan Encapsulated In Natural Rubber Matrices
title_short	Preparation, Characterization And Slow-Release Properties Of Biocomposites Comprising Chitosan Encapsulated In Natural Rubber Matrices
title_full	Preparation, Characterization And Slow-Release Properties Of Biocomposites Comprising Chitosan Encapsulated In Natural Rubber Matrices
title_fullStr	Preparation, Characterization And Slow-Release Properties Of Biocomposites Comprising Chitosan Encapsulated In Natural Rubber Matrices
title_full_unstemmed	Preparation, Characterization And Slow-Release Properties Of Biocomposites Comprising Chitosan Encapsulated In Natural Rubber Matrices
title_sort	preparation, characterization and slow-release properties of biocomposites comprising chitosan encapsulated in natural rubber matrices
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kimia (School of Chemical Sciences)
publishDate	2016
url	http://eprints.usm.my/32232/1/NORHIDAYAH_BINTI_ABU_24%28NN%29.pdf
_version_	1747820549322571776

Preparation, Characterization And Slow-Release Properties Of Biocomposites Comprising Chitosan Encapsulated In Natural Rubber Matrices

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