A novel pathway for high performance RO membrane: Preparing active layer with decreased thickness and enhanced compactness by incorporating tannic acid into the support

被引:102
作者
Shi, Mengqi [1 ,2 ]
Wang, Zhi [1 ,2 ]
Zhao, Song [1 ,2 ]
Wang, Jixiao [1 ,2 ]
Zhang, Peng [3 ]
Cao, Xingzhong [3 ]
机构
[1] Tianjin Univ, Sch Chem Engn & Technol, Chem Engn Res Ctr, Yaguan Rd 135, Tianjin 300350, Peoples R China
[2] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn, State Key Lab Chem Engn, Tianjin Key Lab Membrane Sci & Desalinat Technol, Tianjin 300350, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Key Lab Nucl Radiat & Nucl Energy Technol, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
Polyamide (PA) thin film composite (TFC) reverse osmosis (RO) membrane; PA active layer; Support; Tannic acid (TA); THIN-FILM-COMPOSITE; REVERSE-OSMOSIS MEMBRANES; POSITRON-ANNIHILATION SPECTROSCOPY; POLYAMIDE MEMBRANES; INTERFACIAL POLYMERIZATION; AROMATIC POLYAMIDE; SEPARATION PERFORMANCE; SEAWATER DESALINATION; POLYSULFONE MEMBRANES; WATER DESALINATION;
D O I
10.1016/j.memsci.2018.03.025
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
We report a novel pathway for preparing polyamide (PA) thin-film composite (TFC) reverse osmosis (RO) membrane with high permselectivity by incorporating tannic acid (TA) into the polysulfone (PSf) support. The support and RO membrane were characterized systematically. The results showed that (1) the support surface was enriched with TA due to the high hydrophilcity of TA and (2) TA endowed the RO membrane with a thinner and more compact PA active layer. The influencing mechanism of TA on the PA layer formation was discussed. TA affected the formation of PA layer through changing the m-phenylenediamine (MPD) molecules absorption behavior and the formation of the nascent film. The RO membrane desalination performances for both brackish water and seawater were evaluated. Due to the thinner and more compact PA active layer, PSf/TA-RO (the membrane prepared on PSf/TA support) possessed a higher rejection and a comparative flux compared to PSf-RO (the membrane prepared on PSf support). This work provides an effective way for preparing high performance RO membranes via utilizing support to tailor the aqueous phase monomer absorption and the formation of the nascent film.
引用
收藏
页码:157 / 168
页数:12
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