Antibacterial Polypropylene via Surface-Initiated Atom Transfer Radical Polymerization

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• 作者：Jinyu Huang ; Hironobu Murata ; Richard R. Koepsel ; Alan J. Russell ; Krzysztof Matyjaszewski
• 刊名：Biomacromolecules
• 出版年：2007
• 出版时间：May 2007
• 年：2007
• 卷：8
• 期：5
• 页码：1396 - 1399
• 全文大小：293K
• 年卷期：v.8,no.5(May 2007)
• ISSN：1526-4602

文摘

Polypropylene (PP) coated by a non-leachable biocide was prepared by chemically attaching poly(quaternaryammonium) (PQA) to the surface of PP. The well-defined poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA), a precursor of PQA, was grown from the surface of PP via atom transfer radical polymerization(ATRP). The tertiary ammine groups in PDMAEMA were consequently converted to QA in the presence of ethylbromide. Successful surface modification was confirmed by ATR-FTIR, contact angle measurement, and anantibacterial activity test against Escherichia coli (E. coli). The biocidal activity of the resultant surfaces dependson the amount of the grafted polymers (the number of available quaternary ammonium units). With the samegrafting density, the surface grafted with relatively high MW polymers (M_n > 10,000 g/mol) showed almost100% killing efficiency (killing all of the input E. coli (2.9 × 10⁵) in the shaking test), whereas a low biocidalactivity (85%) was observed for the surface grafted with shorter PQA chains (M_n = 1,500 g/mol).