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Investigation into the Diffusion of Water into HEMA-co-MOEP Hydrogels

George, Karina A., Wentrup-Byrne, Edeline, Hill, David J.T., & Whittaker, Andrew K. (2004) Investigation into the Diffusion of Water into HEMA-co-MOEP Hydrogels. Biomacromolecules, 5(4), pp. 1194-1199.

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Abstract

Cross-linked homopolymers and copolymers of 2-hydroxyethyl methacrylate, HEMA and ethylene glycol methacrylate phosphate, MOEP have been synthesised and the diffusion of water into these systems has been investigated. Only polymers with 0 – 30 mol% MOEP exhibited ideal hydrogel behaviour as extensive fracturing occurred in the systems with greater than 30 mol% MOEP as the polymer began to swell during water sorption. Gravimetric studies were used in conjunction with magnetic resonance imaging of the diffusion front to elucidate the diffusion mechanism for these systems. In the case of the crosslinked HEMA homopolymer gels, the water transport mechanism was determined to be concentration-independent Fickian diffusion. However, as the fraction of MOEP in the network increased the transport mechanism became increasingly exponentially concentration-dependent but remained Fickian until the polymer consisted of 30 mol% MOEP where the water transport could no longer be described by Fickian diffusion.

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ID Code: 3067
Item Type: Journal Article
Additional Information: This article is freely available from the American Chemical Society website 12 months after the publication date. See links to publisher website in this record.
Keywords: hydrogel, Fickian diffusion, HEMA, co, MOEP
DOI: 10.1021/bm034477p
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2004 American Chemical Society
Copyright Statement: The contents of this journal can be freely accessed online via the ACS web page 12 months after publication. See hypertext link.
Deposited On: 15 Sep 2006
Last Modified: 29 Feb 2012 23:03

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