Prevention of bacterial adhesion on polyamide reverse osmosis membranes via electrostatic interactions using a cationic phosphorylcholine polymer coating
Prevention of bacterial adhesion on polyamide reverse osmosis membranes via electrostatic interactions using a cationic phosphorylcholine polymer coating
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DOI：
10.1016/j.colsurfa.2013.11.007
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
D. Saeki;T. Tanimoto;H. Matsuyama
中科院分区：
文献类型：
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作者：
D. Saeki;T. Tanimoto;H. Matsuyama
采用阳离子磷胆碱聚合物对聚酰胺反渗透（RO）膜进行静电防粘涂覆，研究了一种简单、简便的防粘方法。将商用聚酰胺反渗透膜浸入含有阳离子氨基的磷酸胆碱聚合物聚[2-甲基丙烯酰氧乙基磷酸胆碱(MPC)-co-2-氨基乙基甲基丙烯酸酯（AEMA）] （p(MPC-co-AEMA)）的水溶液中。从接触角和表面电位的测量结果来看，涂覆后的反渗透膜表面比原膜更亲水，并带有中性电荷。相反，浸泡在不含AEMA基团的MPC均聚物水溶液中的反渗透膜表面没有被聚合物包覆。因此，p（MPC-co-AEMA）通过AEMA的阳离子氨基与阴离子羧基之间的静电相互作用吸附在聚酰胺反渗透膜上。x射线光电子能谱显示p（MPC-co-AEMA）在涂膜上存在磷酸胆碱基团。石英晶体微天平耗散监测结果表明，在高离子强度溶液中，吸附的p（MPC-co-AEMA）在至少一天内几乎没有从聚酰胺表面解吸。涂覆后的反渗透膜具有较高的抗细菌粘附性能，并保持了原有的阻垢性能。
A simple and easy anti-adhesive coating method against bacteria via electrostatic interaction was developed for polyamide reverse osmosis (RO) membranes using a cationic phosphorylcholine polymer. A commercial polyamide RO membrane was immersed into an aqueous solution of phosphorylcholine polymer containing cationic amino groups, poly[2-methacryloyloxyethyl phosphorylcholine (MPC)-co-2-aminoethylmethacrylate (AEMA)] (p(MPC-co-AEMA)). From the results of contact angle and surface potential measurements, the surface of the coated RO membrane became more hydrophilic than that of raw membranes and had a neutral charge. Conversely, the surface of an RO membrane immersed in an aqueous solution of MPC homopolymer without AEMA groups was not coated by the polymer. Therefore, p(MPC-co-AEMA) was adsorbed via electrostatic interaction between the cationic amino groups of AEMA and anionic carboxylic groups on the polyamide RO membrane. X-ray photoelectron spectroscopy showed the existence of phosphorylcholine groups from p(MPC-co-AEMA) on the coated membranes. The result of quartz crystal microbalance with dissipation monitoring measurements showed that adsorbed p(MPC-co-AEMA) was hardly desorbed from the polyamide surface in a high ionic strength solution at least for one day. The coated RO membrane had high resistance to bacterial adhesion and retained its original rejection performance.