Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Formation of porous natural-synthetic polymer composites using emulsion templating and supercritical fluid assisted impregnation
AU - Partap, S.
AU - Hebb, A.K.
AU - Ur Rehman, I.
AU - Darr, J.A.
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
KW - Carbon dioxide
KW - Impregnation
KW - Initiators (chemical)
KW - Natural polymers
KW - Porous materials
KW - Supercritical fluids
KW - Emulsion templating
KW - Polymer composites
KW - Supercritical fluid assisted impregnation
KW - Synthetic monomer mixtures
KW - Polymer matrix composites
KW - Catalysts
KW - Natural Polymers
KW - Synthetic Polymers
U2 - 10.1007/s00289-006-0724-y
DO - 10.1007/s00289-006-0724-y
M3 - Journal article
VL - 58
SP - 849
EP - 860
JO - Polymer Bulletin
JF - Polymer Bulletin
SN - 0170-0839
IS - 5-6
ER -