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Antibacterial and hemocompatibility switchable polypropylene nonwoven fabric membrane surface  
Antibacterial and hemocompatibility switchable polypropylene nonwoven fabric membrane surface
资料类型: PDF文件
关键词: antibacterial  UV-induced  graft  polymerization  polypropylene  nonwoven  fabric  
membrane  hemocompatibility  zwitterionic  polymer  
资料大小: k
所属学科: 高分子工程
来源: 来源网络
简介:
In this article, a facile approach to fabricate abiofunctional polypropylene nonwoven fabric membrane (PP NWF)with a switchable surface from antibacterial property to hemocompatibilityis presented. In the first step, a cationic carboxybetaine estermonomer, [(2-(methacryboxy) ethyl)]-N,N-dimethylamino-ethylammoniumbromide, methyl ester (CABA-1-ester) was synthesized.Subsequently, this monomer was introduced on the PP NWF surfacevia plasma pretreatment and a UV-induced graft polymerizationtechnique. Finally, a switchable surface from antibacterial property tohemocompatibility was easily realized by hydrolysis of poly(CABA-1-ester) moieties on the PP NWF surface under mild conditions.Surface hydrolysis behaviors under different pH conditions were investigated. These PP NWFs grafted with poly(CABA-1-ester)segments can cause significant suppression of S. aureus proliferation; after hydrolysis, these surfaces covered by poly[(2-(methacryloxy) ethyl)] carboxybetaine (poly(CABA)) chains exhibited obvious reduction in protein adsorption and plateletadhesion, and remarkably enhanced antithrombotic properties. This strategy demonstrated that a switchable PP NWF surfacefrom antibacterial property to hemocompatibility was easily developed by plasma pretreatment and UV-induced surface graftpolymerization and that this surface may become an attractive platform for a range of biomedical applications.
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