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Langmuir-Blodgett方法构建聚合物仿细胞外层膜结构涂层

ACTA POLYMERICA SINICA(2014)

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Abstract
以盖玻片为基质,采用Langmuir-Blodgett (LB)方法制备含磷酰胆碱基团的两亲性无规共聚物聚(2-甲基丙烯酰氧基乙基磷酰胆碱(MPC)-甲基丙烯酸十八烷基酯(SMA)-γ-甲基丙烯酰氧丙基三甲氧基硅(TSMA)(简称PMST)的单层、双层和三层薄膜.薄膜的表面亲疏水性和表面形貌分别用动态接触角(DCA)和原子力显微镜(AFM)进行测试.结果表明,PMST在盖玻片表面形成了致密的膜层,薄膜的致密程度随层数而增加.在水中前进/后退测试DCA过程中,聚合物薄膜在气相/水相界面存在基团的迁移取向,且膜层内会发生交联.双层膜具有仿细胞外层膜结构,单层和三层膜具有反细胞外层膜结构;双层膜的亲水性比单层和三层膜的要好.
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Key words
Phosphorylcholine,LB film,Contact angle,Surface modification,Biomaterials
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