화학공학소재연구정보센터
Applied Surface Science, Vol.253, No.2, 983-988, 2006
Preparing polymer brushes on polytetrafluoroethylene films by free radical polymerization
Films of polytetrafluoroethylene (PTFE) were exposed to sodium naphthalenide (Na/naphtha) etchant so as to defluorinate the surface for obtaining hydroxyl functionality. Surface-initiators were immobilized on the PTFE films by esterification of 4,4-azobis(4-cyanopentanoic acid) (ACP) and the hydroxyl groups covalently linked to the surface. Grafting of polymer brushes on the PTFE films was carried out by the surface-initiated free radical polymerization. Homopolymers brushes of methyl methacrylate (MMA) were prepared by free radical polymerization from the azo-functionalized PTFE surface. The chemical composition and topography of the graft-functionalized PTFE surfaces were characterized by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance (ATR) Fr-IR spectroscopy and atomic force microscopy (A-FM). Water contact angles on PTFE films were reduced by surface grafting of MMA. (c) 2006 Elsevier B.V. All rights reserved.