pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals

The purpose of this study was to produce a novel pH sensitive hydrogel with superior thermal stability, composed of poly(acrylic acid) (PAA) and cellulose nanocrystal (CNC). CNC was extracted from kenaf fiber through a series of alkali and bleaching treatments followed by acid hydrolysis. PAA was th...

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Main Authors:	Lim, Sze Lim, Ishak Ahmad, Azwan Mat Lazim
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2015
Online Access:	http://journalarticle.ukm.my/8956/ http://journalarticle.ukm.my/8956/ http://journalarticle.ukm.my/8956/1/02_Lim_Sze_Lim.pdf

id	ukm-8956
recordtype	eprints
spelling	ukm-89562016-12-14T06:48:33Z http://journalarticle.ukm.my/8956/ pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals Lim, Sze Lim Ishak Ahmad, Azwan Mat Lazim, The purpose of this study was to produce a novel pH sensitive hydrogel with superior thermal stability, composed of poly(acrylic acid) (PAA) and cellulose nanocrystal (CNC). CNC was extracted from kenaf fiber through a series of alkali and bleaching treatments followed by acid hydrolysis. PAA was then subjected to chemical cross-linking using the cross-linking agent (N,N-methylenebisacrylamide) in CNC suspension. The mixture was casted onto petri dish to obtain disc shape hydrogel. PAA/cellulose hydrogel with the same composition ratio were also prepared as control. The effect of reaction conditions such as the ratio of PAA and CNC on the swelling behavior of the hydrogel obtained towards pH was studied. The obtained hydrogel was further subjected to different tests such as thermogravimetric analysis (TGA) to study the thermal behavior, Fourier transform infrared for functional group identification and swelling test for swelling behavior at different pH. The cross-linking of PAA was verified with FTIR with the absence of C=C double bond. In TGA test, PAA/CNC hydrogel showed significantly higher thermal stability compared with pure PAA hydrogel. The hydrogel obtained showed excellent pH sensitivity and experienced maximum swelling at pH7. The PAA/CNC hydrogel can be developed further as drug carrier. Universiti Kebangsaan Malaysia 2015-06 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/8956/1/02_Lim_Sze_Lim.pdf Lim, Sze Lim and Ishak Ahmad, and Azwan Mat Lazim, (2015) pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals. Sains Malaysiana, 44 (6). pp. 779-785. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid44bil6_2015/KandunganJilid44Bil6_2015.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	The purpose of this study was to produce a novel pH sensitive hydrogel with superior thermal stability, composed of poly(acrylic acid) (PAA) and cellulose nanocrystal (CNC). CNC was extracted from kenaf fiber through a series of alkali and bleaching treatments followed by acid hydrolysis. PAA was then subjected to chemical cross-linking using the cross-linking agent (N,N-methylenebisacrylamide) in CNC suspension. The mixture was casted onto petri dish to obtain disc shape hydrogel. PAA/cellulose hydrogel with the same composition ratio were also prepared as control. The effect of reaction conditions such as the ratio of PAA and CNC on the swelling behavior of the hydrogel obtained towards pH was studied. The obtained hydrogel was further subjected to different tests such as thermogravimetric analysis (TGA) to study the thermal behavior, Fourier transform infrared for functional group identification and swelling test for swelling behavior at different pH. The cross-linking of PAA was verified with FTIR with the absence of C=C double bond. In TGA test, PAA/CNC hydrogel showed significantly higher thermal stability compared with pure PAA hydrogel. The hydrogel obtained showed excellent pH sensitivity and experienced maximum swelling at pH7. The PAA/CNC hydrogel can be developed further as drug carrier.
format	Article
author	Lim, Sze Lim Ishak Ahmad, Azwan Mat Lazim,
spellingShingle	Lim, Sze Lim Ishak Ahmad, Azwan Mat Lazim, pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals
author_facet	Lim, Sze Lim Ishak Ahmad, Azwan Mat Lazim,
author_sort	Lim, Sze Lim
title	pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals
title_short	pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals
title_full	pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals
title_fullStr	pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals
title_full_unstemmed	pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals
title_sort	ph sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals
publisher	Universiti Kebangsaan Malaysia
publishDate	2015
url	http://journalarticle.ukm.my/8956/ http://journalarticle.ukm.my/8956/ http://journalarticle.ukm.my/8956/1/02_Lim_Sze_Lim.pdf
first_indexed	2023-09-18T19:53:35Z
last_indexed	2023-09-18T19:53:35Z
_version_	1777406381033259008

pH sensitive hydrogel based on poly(acrylic acid) and cellulose nanocrystals

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