AMPHIPHILIC COMB-SHAPED DIBLOCK POLYMER BRUSHES ONSi(100)SUBSTRATES VIA SURFACE-INITIATED ATOM TRANSFER RADICAL POLYMERIZATION

Jin-Wen Peng, Wei Huang (), En-Tang Kang and Koon Gee Neoh
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Jin-Wen Peng: Institute of Advanced Materials (IAM), Fudan University, 220 Handan Road, Shanghai 200433, P. R. China
Wei Huang: Institute of Advanced Materials (IAM), Fudan University, 220 Handan Road, Shanghai 200433, P. R. China
En-Tang Kang: Department of Chemical and Biomolecular Engineering, National University of Singapore, Kent Ridge, Singapore 119260, Singapore
Koon Gee Neoh: Department of Chemical and Biomolecular Engineering, National University of Singapore, Kent Ridge, Singapore 119260, Singapore

Surface Review and Letters (SRL), 2006, vol. 13, issue 02n03, 251-257

Abstract: Amphiphilic comb-shaped 2-hydroxyethyl methacrylate-graft-poly(styrene)-block-poly(poly (ethylene glycol) monomethacrylate)(P(HEMA)–g–PS–b–P(PEGMA))copolymer brushes, covalently tethered onSi(100)substrate, have been successfully prepared by (i) UV-induced hydrosilylation of 4-vinylbenzyl chloride (VBC) with the hydrogen-terminatedSi(100)(Si–VBCsurface), (ii) surface-initiated atom transfer radical polymerization (ATRP) of 2-hydroxyethyl methacrylate (HEMA) to give theSi–VBC–g–P(HEMA)surface, (iii) coupling of 2-bromoisobutyryl bromide with the HEMA units via esterification to provide the comb-shaped macroinitiators(Si–VBC–g–P(HEMA)–R3Br)for the subsequent ATRP, (iv) surface-initiated ATRP of styrene (St) to produce theSi–VBC–g–P(HEMA)–g–PSsurface, and (v) the persisting of an active PS chain end can be used as the initiator for the subsequent ATRP of poly(ethylene glycol) monomethacrylate (PEGMA) to give the amphiphilicSi–VBC–g–P(HEMA)–g–PS–b–P(PEGMA)brush surface. The chemical composition and functionality of the silicon surface were tailored by the well-defined comb-shaped PS and P (PEGMA) brushes.

Keywords: Amphiphilic; silicon surface; ATRP; comb-shaped (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X06008086

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