Surface modification of thin film composite RO membrane for enhanced anti-biofouling performance
Surface modification of thin film composite RO membrane for enhanced anti-biofouling performance
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DOI：
10.1016/j.memsci.2013.05.032
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发表时间：
2013-10-01
影响因子：
9.5
通讯作者：
Tang, Chuyang Y.
中科院分区：
文献类型：
--
作者：
Nikkola, Juha;Liu, Xin;Tang, Chuyang Y.
制备了抗粘附和抗菌涂层，并将其应用于商用薄膜复合（TFC）聚酰胺（PA）膜以提高抗生物污染性能。采用阳离子型聚胍盐酸盐（PHMG）聚合物对聚乙烯醇（PVA）涂层进行改性，以提高涂层的抗菌性能。ATR-FTIR、SEM和AFM研究了涂膜的表面化学和形貌。使用接触角测量来确定亲水性和表面能。与未涂覆的膜相比，所有涂覆的膜显示出更高的亲水性和更低的表面粗糙度。在涂覆的膜上检测到较低数量的粘附的铜绿假单胞菌（P. aeruginosa）细菌，表明抗粘附性能。殖民地形成单位（CFU）和扩散抑制区（DIZ）测试确定了涂覆的膜对大肠杆菌（Escherichia coli）（E. coli）和枯草芽孢杆菌（B.枯草杆菌），显示PHMG的抗微生物性能。结果表明，采用防粘和抗菌性能相结合的涂层可以获得最佳的防污表面。(C)2013爱思唯尔有限公司版权所有。
Anti-adhesion and antimicrobial coatings were prepared and applied on commercial thin-film-composite (TFC) polyamide (PA) membrane to enhance anti-biofouling performance. Polyvinyl alcohol (PVA) coating was modified with cationic polyhexamethylene guanidine hydrochloride (PHMG) polymer to obtain antimicrobial performance. ATR-FTIR, SEM and AFM investigated the surface chemistry and morphology of the coated membranes. The contact angle measurement was used to determine hydrophilicity and surface energy. All coated membranes revealed more hydrophilic and lower surface roughness compared to uncoated membrane. Lower number of adhered Pseudomonas aeruginosa (P. aeruginosa) bacteria was detected on coated membranes, indicating anti-adhesion performance. The colony forming unit (CFU) and diffusion inhibition zone (DIZ) tests determined antimicrobial activity of the coated membranes against Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis), showing the antimicrobial performance of PHMG. The results suggested that an optimal anti-fouling surface could be obtained applying a coating, which combines anti-adhesion and antimicrobial performance. (C) 2013 Elsevier B.V. All rights reserved.