生物污染
材料科学
膜
化学工程
聚酰胺
界面聚合
反渗透
水溶液
海水淡化
阳离子聚合
化学
色谱法
薄膜复合膜
单体
聚合物
肺表面活性物质
高分子化学
有机化学
生物化学
工程类
作者
Sung‐Joon Park,Myung-Seok Lee,Wansuk Choi,Jung-Hyun Lee
标识
DOI:10.1016/j.cej.2021.134114
摘要
Biofouling is a critical problem for water treatment and desalination membranes because it significantly reduces process efficiency. Here, we present a new facile strategy for the fabrication of anti-biofouling polyamide (PA) thin film composite (TFC) membranes that involves the addition of the biocidal cationic surfactant, benzalkonium chloride (BAC), to an amine monomer solution during interfacial polymerization. The optimal addition of BAC effectively promotes and uniformizes amine diffusion toward the organic phase by reducing organic–aqueous interfacial tension and improving solution wettability on the support, producing a denser and more permeable PA structure. Moreover, BAC was strongly integrated into the PA matrix, presumably via strong chemical interactions between BAC and PA (i.e., electrostatic, hydrophobic, π–π stacking, and cation–π interactions), which enhanced the surface hydrophilicity and anti-bacterial activity of the membrane. Consequently, the BAC-incorporated TFC (BAC-TFC) membrane exhibited significantly enhanced reverse osmosis separation and anti-biofouling performance in comparison with the control TFC membrane. When compared with the conventional surfactant, sodium dodecyl sulfate, BAC resulted in remarkably improved biofouling resistance with comparable performance enhancement. Furthermore, the strong incorporation of BAC into PA led to the long-term durability of the BAC-TFC membrane in terms of its separation and anti-biofouling performance.
科研通智能强力驱动
Strongly Powered by AbleSci AI