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Issue 14, 2015
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Enhancing the protein resistance of silicone via surface-restructuring PEO–silane amphiphiles with variable PEO length

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Abstract

Silicones with superior protein resistance were produced by bulk-modification with poly(ethylene oxide) (PEO)–silane amphiphiles that demonstrated a higher capacity to restructure to the surface–water interface versus conventional non-amphiphilic PEO–silanes. The PEO–silane amphiphiles were prepared with a single siloxane tether length but variable PEO segment lengths: α-(EtO)3Si(CH2)2-oligodimethylsiloxane13-block-poly(ethylene oxide)n-OCH3 (n = 3, 8, and 16). Conventional PEO–silane analogues (n = 3, 8, and 16) as well as a siloxane tether-silane (i.e. no PEO segment) were prepared as controls. When surface-grafted onto silicon wafer, PEO–silane amphiphiles produced surfaces that were more hydrophobic and thus more adherent towards fibrinogen versus the corresponding PEO–silane. However, when blended into a silicone, PEO–silane amphiphiles exhibited rapid restructuring to the surface–water interface and excellent protein resistance whereas the PEO–silanes did not. Silicones modified with PEO–silane amphiphiles of PEO segment lengths n = 8 and 16 achieved the highest protein resistance.

Graphical abstract: Enhancing the protein resistance of silicone via surface-restructuring PEO–silane amphiphiles with variable PEO length

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Supplementary files

Article information


Submitted
11 Dec 2014
Accepted
10 Feb 2015
First published
13 Feb 2015

J. Mater. Chem. B, 2015,3, 2816-2825
Article type
Paper
Author version available

Enhancing the protein resistance of silicone via surface-restructuring PEO–silane amphiphiles with variable PEO length

M. A. Rufin, J. A. Gruetzner, M. J. Hurley, M. L. Hawkins, E. S. Raymond, J. E. Raymond and M. A. Grunlan, J. Mater. Chem. B, 2015, 3, 2816
DOI: 10.1039/C4TB02042A

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