FUNCTIONALIZING PS MICROSPHERES BY SUPERCRITICAL DEPOSITION OF P(S-b-tBA) FOR DIVERSE INTERFACIAL PROPERTIES EXEMPLIFIED WITH BIOCIDAL ABILITY  

作　　者：陈勇 

机构地区：[1]Department of Applied Chemistry,School of Chemical & Environmental Engineering,Shandong University of Science and Technology

出　　处：《Chinese Journal of Polymer Science》2012年第3期451-459,共9页高分子科学（英文版）

基　　金：financially supported by the Chunlei Project of Shandong University of Science and Technology (Nos.2009AZZ013,06540040711)and by SRF for ROCS,SEM

摘　　要：Polystyrene （PS） microsphel＂es were functionalized with poly（styrene-b-tert-butyl acrylate） （P（S-b-tBA）） by adsorption from supereritical mixture of CO2 and hexane. Supercritical deposition formed a shell-core structure that contained a shell ofpoly（tert-butyl acrylate） （PtBA） blocks and a core of the PS blocks entangling with the PS microspheres. The thickness of the PtBA layer and thereby the areal density of ten-butyl ester groups increased v;ith the deposition pressure until plateau values attained at 20 MPa and higher. The tert-butyl ester groups were hydrolyzed to earboxyl groups for conjugation with tert-butylamine molecules via amide bonds that were further chlorinated into biocidal N-halamine moieties. The functionalization layer and its bonded N-halamine moieties were stable in flowing watel and the chlorine could be regenerated upon eventual loss. This functionalization concept is applicable to polymers of any external and internal surfaces to achieve diverse surface properties by varying block eopolymer and conjugated mo：ieties.Polystyrene （PS） microsphel＂es were functionalized with poly（styrene-b-tert-butyl acrylate） （P（S-b-tBA）） by adsorption from supereritical mixture of CO2 and hexane. Supercritical deposition formed a shell-core structure that contained a shell ofpoly（tert-butyl acrylate） （PtBA） blocks and a core of the PS blocks entangling with the PS microspheres. The thickness of the PtBA layer and thereby the areal density of ten-butyl ester groups increased v;ith the deposition pressure until plateau values attained at 20 MPa and higher. The tert-butyl ester groups were hydrolyzed to earboxyl groups for conjugation with tert-butylamine molecules via amide bonds that were further chlorinated into biocidal N-halamine moieties. The functionalization layer and its bonded N-halamine moieties were stable in flowing watel and the chlorine could be regenerated upon eventual loss. This functionalization concept is applicable to polymers of any external and internal surfaces to achieve diverse surface properties by varying block eopolymer and conjugated mo：ieties.

关 键 词：Surface functionalization Supercritical deposition N-halamine. 

分 类 号：O631.3[理学—高分子化学]