Fabrication and characterization of a surface-patterned thin film composite membrane
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- 作者：Sajjad H. Maruf ; Alan R. Greenberg ; John Pellegrino ; Yifu Ding
- 关键词：Surface topography ; Thin film composite membrane ; Interfacial polymerization ; Concentration polarization
- 刊名：Journal of Membrane Science
- 出版年：15 February, 2014
- 年：2014
- 卷：452
- 期：Complete
- 页码：11-19
- 全文大小：1465 K
文摘
Thin film composite (TFC) membranes are critical components for reverse osmosis (RO) and nanofiltration (NF) processes. Similar to other liquid-based filtration membranes, TFC membranes are susceptible to concentration polarization and fouling/scaling. Recently, surface topography modification has been shown as a potential approach for fouling mitigation. However, for TFC membranes, tailoring the surface topography remains a challenge. Here, we demonstrate for the first time, successful fabrication of a patterned TFC membrane. A two-step fabrication process was carried out by (1) nanoimprinting a polyethersulfone (PES) support, and (2) forming a thin dense film atop the PES support via interfacial polymerization (IP) with trimesoyl chloride and 1,3-phenylenediamine solutions. Chemical, topographic, and permeation characterization was performed on the imprinted IP membranes, and their permselectivity was compared with that of a flat (non-imprinted) TFC membrane prepared using the same IP procedure.