期刊
JOURNAL OF MEMBRANE SCIENCE
卷 527, 期 -, 页码 121-128出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2016.12.066
关键词
Molecular layer-by-layer; Interfacial polymerization; Polyamide thin film composite membrane; Reverse osmosis; Water desalination
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2016R1D1A1B03933552]
- Fundamental R&D Program for Technology of World Premier Materials - Ministry of Trade, Industry and Energy, Republic of Korea [10037794]
- Korean Ministry of Environment as Global Top Project [2016002100007]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10037794] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016R1D1A1B03933552] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Reverse osmosis (RO) process using a thin-film composite (TFC) membrane is a current leading technology for water desalination. The polyamide permselective layer of the TFC membrane enables salt retention and water permeation, with the ultimate goal of minimizing the permselective layer thickness for maximum energy efficiency. Yet this drive towards reducing the permselective layer thickness is greatly handicapped by the interfacial polymerization (IP) approach used to fabricate TFC membranes. We present layered interfacial polymerization (LIP) as a new paradigm for fabricating TFC membranes with unprecedented nanoscale control in the permselective layer thickness and smoothness, coupled with the advantage of industrial scale manufacturability. Membranes fabricated using LIP demonstrated high NaCl rejection necessary for water desalination, with water permeance approximate to 86% and permselectivity approximate to 450% greater than that of the membranes prepared using conventional IP and comparable water permeance and permselectivity approximate to 17% higher than that of commercial RO membranes. In addition, the unique smooth morphology of the LIP-assembled membrane surface enabled to mitigate the membrane fouling compared to the characteristic rough surface of the conventional IP-assembled membrane.
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