Formation of porous natural-synthetic polymer composites using emulsion templating and supercritical fluid assisted impregnation

Partap, S. and Hebb, A.K. and Ur Rehman, I. and Darr, J.A. (2007) Formation of porous natural-synthetic polymer composites using emulsion templating and supercritical fluid assisted impregnation. Polymer Bulletin, 58 (5-6). pp. 849-860. ISSN 0170-0839

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Abstract

Porous natural-synthetic polymer composites were prepared using an alginate emulsion templating step followed by supercritical carbon dioxide (sc-CO 2) assisted impregnation (and subsequent polymerisation) of synthetic monomer mixtures. In the impregnation step, an initiator and either 2-hydroxyethylmethacrylate (HEMA), butylmethacrylate (BMA), ethyleneglycoldimethacrylate (EGDMA) or trimethylolpropanetrimethacrylate (TRIM) monomers, respectively, were used. After impregnation into the porous alginate foam, the synthetic monomer(s) were polymerised in situ, forming porous composites with increased stiffness. A number of methods were used to assess the effects of the impregnation/polymerisation process including uniaxial compression testing, scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP), helium pycnometry and Fourier transform infra-red (FTIR) spectroscopy. Our results suggest that alginate foams impregnated with HEMA show higher weight gains and are stiffer than those impregnated with BMA. Such stiffer porous composites are potentially better suited than the unmodified materials in applications such as tissue engineering (cell-seeded) scaffolds, where mechanical conditioning is desired to stimulate cells for development of neo tissue growth. © Springer-Verlag 2007.

Item Type:
Journal Article
Journal or Publication Title:
Polymer Bulletin
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
132864
Deposited By:
Deposited On:
16 Apr 2019 14:55
Refereed?:
Yes
Published?:
Published
Last Modified:
06 May 2020 06:58