Thixotropic Supramolecular Pectin-Poly(Ethylene Glycol) Methacrylate (PEGMA) Hydrogels

Siew Yin Chan; Wee Sim Choo; David James Young; Xian Jun Loh

doi:10.3390/polym8110404

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Thixotropic Supramolecular Pectin-Poly(Ethylene Glycol) Methacrylate (PEGMA) Hydrogels

Journal article

Open access

Peer reviewed

Thixotropic Supramolecular Pectin-Poly(Ethylene Glycol) Methacrylate (PEGMA) Hydrogels

Siew Yin Chan, Wee Sim Choo, David James Young and Xian Jun Loh

Polymer, Vol.8(11)

2016

DOI: https://doi.org/10.3390/polym8110404

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Abstract

pectin

poly(ethylene glycol) methacrylate

cerium

α-cyclodextrin

supramolecular hydrogel

Pectin is an anionic, water-soluble polymer predominantly consisting of covalently 1,4-linked α-d-galacturonic acid units. This naturally occurring, renewable and biodegradable polymer is underutilized in polymer science due to its insolubility in organic solvents, which renders conventional polymerization methods impractical. To circumvent this problem, cerium-initiated radical polymerization was utilized to graft methoxy-poly(ethylene glycol) methacrylate (mPEGMA) onto pectin in water. The copolymers were characterized by 1H nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA), and used in the formation of supramolecular hydrogels through the addition of α-cyclodextrin (α-CD) to induce crosslinking. These hydrogels possessed thixotropic properties; shear-thinning to liquid upon agitation but settling into gels at rest. In contrast to most of the other hydrogels produced through the use of poly(ethylene glycol) (PEG)-grafted polymers, the pectin-PEGMA/α-CD hydrogels were unaffected by temperature changes.

Details

Title: Thixotropic Supramolecular Pectin-Poly(Ethylene Glycol) Methacrylate (PEGMA) Hydrogels
Authors: Siew Yin Chan (Author) - Monash University Malaysia, Malaysia
Wee Sim Choo (Author) - Monash University Malaysia, Malaysia
David James Young (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Xian Jun Loh (Author) - National University of Singapore, Singapore
Publication details: Polymer, Vol.8(11); 12
Publisher: Elsevier Ltd.
Date published: 2016
DOI: 10.3390/polym8110404
ISSN: 0032-3861
Copyright note: Copyright The Author. © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/)
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450446302621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Polymer Science

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