Development and Physicochemical Characterization of Modified Polymeric Surfaces for Bacterial Adhesion
Development and Physicochemical Characterization of Modified Polymeric Surfaces for Bacterial Adhesion
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DOI：
10.1002/app.32838
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发表时间：
2011-02-05
影响因子：
3
通讯作者：
Riquet, A. -M.
中科院分区：
文献类型：
--
作者：
Anjum, N.;Riquet, A. -M.
采用辐射接枝聚合法对聚丙烯（PP）片材进行表面改性，以提高其对细菌的粘附性。对于实验，混合两种单体：季铵盐（QAS）[2-（甲基丙烯酰氧基）乙基]三甲基氯化铵和丙烯酸（AAc）。在接枝反应之前，通过电子束辐射活化PP片材。使用不同的AAc/QAS共聚单体混合物比率（50：10、40：20、30：30、20：40和10：50）来确定接枝度并使PP表面亲水。接枝率随着共聚单体混合物中AAc的百分比的增加而增加。在接枝聚合过程中的协同作用进行了研究，以量化的聚（丙烯酸）和聚{[2-（甲基丙烯酰氧基）乙基]三甲基氯化铵}接枝分数在所得的接枝共聚物。的接枝分数的近似与分析技术的基础上，酸碱容量滴定。通过测量水接触角来确定改性表面的润湿性。在共聚单体混合物中用较高百分比的QAS制备的表面具有比用较低百分比的QAS制备的表面更低的接触角。用X射线光电子能谱研究了改性PP表面氧和氮的存在。用差示扫描量热法对改性前后PP的结构变化进行了表征。(C)2010 Wiley Periodicals，Inc. J Appl Polym Sci 119：1307-1315，2011
Radiation-induced graft polymerization was used to modify the surfaces of polypropylene (PP) sheets for bacterial adhesion. For the experiments, two monomers were mixed: the quaternary ammonium salt (QAS) [2-(methacryloyloxy)ethyl]trimethylammonium chloride and acrylic acid (AAc). The PP sheets were activated by electron-beam radiation before the grafting reaction. Different AAc/QAS comonomer mixture ratios (50 : 10, 40 : 20, 30 : 30, 20 : 40, and 10 : 50) were used to determine the degree of grafting and to make the PP surfaces hydrophilic. The graft level increased with an increase in the percentage of AAc in the comonomer mixtures. Synergism was investigated during graft polymerization to quantify the poly(acrylic acid) and poly{[2-(methacryloyloxy) ethyl] trimethylammonium chloride} graft fractions in the resulting graft copolymers. An approximation of the graft fractions was made with an analytical technique based on acid-base volumetric titration. The wettability of the modified surfaces was determined by the measurement of the water contact angles. The surfaces prepared with higher percentages of QAS in the comonomer mixtures had lower contact angles than those prepared with lower percentages of QAS. The presence of oxygen and nitrogen on the modified PP surfaces was investigated with X-ray photoelectron spectroscopy. Structural changes in unmodified and modified PP were characterized with differential scanning calorimetry. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 119: 1307-1315, 2011