Choi, Wansuk Gu, Joung-Eun Park, Sang-Hee Kim, Seyong Bang, Joona Baek, Kyung-Youl Park, Byoungnam Lee, Jong Suk Chan, Edwin P. Lee, Jung-Hyun 2024-01-20T08:02:41Z 2024-01-20T08:02:41Z 2021-09-05 2015-01 1936-0851 https://pubs.kist.re.kr/handle/201004/125932 Independent control of the extrinsic and intrinsic properties of the polyamide (PA) selective layer is essential for designing thin-film composite (TFC) membranes with performance characteristics required for water purification applications besides seawater desalination. Current commercial TFC membranes fabricated via the well-established interfacial polymerization (IP) approach yield materials that are far from ideal because their layer thickness, surface roughness, polymer chemistry, and network structure cannot be separately tailored. In this work, tailor-made PA-based desalination membranes based on molecular layer-by-layer (mLbL) assembly are presented. The mLbL technique enables the construction of an ultrathin and highly cross-linked PA seletive layer in a precisely and independently controlled manner. The mLbL-assembled TFC membranes exhibit significant enhancements in performance compared to their IP-assembled counterparts. A maximum sodium chloride rejection of 98.2% is achieved along with over 2.5 times higher water flux than the IP-assembled counterpart. More importantly, this work demonstrates the broad applicability of mLbL in fabricating a variety of PA-based TFC membranes with nanoscale control of the selective layer thickness and roughness independent of the specific polyamide chemistry. English AMER CHEMICAL SOC FILM COMPOSITE MEMBRANES REVERSE-OSMOSIS MEMBRANES INTERFACIAL POLYMERIZATION MOLECULAR-STRUCTURE TETRAACYL CHLORIDE THIN-FILMS PERFORMANCE LAYER RO NANOFILTRATION Tailor-Made Polyamide Membranes for Water Desalination Article 10.1021/nn505318v 1 ACS NANO, v.9, no.1, pp.345 - 355 ACS NANO 9 1 345 355 scie scopus 000348619000036 2-s2.0-84921711101 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article FILM COMPOSITE MEMBRANES REVERSE-OSMOSIS MEMBRANES INTERFACIAL POLYMERIZATION MOLECULAR-STRUCTURE TETRAACYL CHLORIDE THIN-FILMS PERFORMANCE LAYER RO NANOFILTRATION molecular layer-by-layer polyamide reverse osmosis thin film composite membrane water desalination