期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 308, 期 1-3, 页码 129-135出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2007.05.080
关键词
poly(dimethylsiloxane); poly(ethylene glycol); hydrosilylation; karstedt's catalyst; speier's catalyst
Poly(ethylene glycol) (PEG) was grafted on the hydrophobic poly(dimethylsiloxane) (PDMS) surface as a hydrophilic outmost monolayer for potential applications such as biomaterials, microfluidics, and anti-fouling coatings. A two component sylgard 184 PDMS (part A of poly(hydrogen methyl siloxane) (PMHS) and part B of poly(methyl vinyl siloxane) (PMVS) was vulcanized in an off-ratio of, A/B > 1/10, where excess Si-H species exist in the elastomer. An allyl PEG took the hydrosilylation reaction with the surface Si-H groups, catalyzed by the Speier's or Karstedt's catalyst, and resulted a hydrophilic and anti-fouling surface. Atomic Force Microscopy (AFM) observations revealed a well uniform surface with a surface height variation at angstrom scale. Bovine Serum (BS), Bovine Serum Albumin (BSA), Lysozyme (Lys), and Rb IgG/FITC were used to evaluate the protein adsorption on PEG-coated PDMS surface by means of the well-established ATR-FTIR and fluorescence scanner. Results indicated that the PEG monolayer was efficient in reducing the adsorption of proteins. (c) 2007 Elsevier B.V. All rights reserved.
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