膜科学与技术

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Layer by layer self-assembly forward osmosis membrane preparation based on coordination

Authors： WEI Tong SU Baowei

Units： Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education; College of Chemistry & Chemical Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, China

KeyWords： layer by layer self-assembly; forward osmosis; coordination

ClassificationCode：

year,volume(issue):pagination： 2015,35(5):35-41

Abstract：

A kind of layer by layer self-assembly forward osmosis (FO) membrane has been prepared based on metallic ion’s coordination interaction, using commercial polyacrylonitrile (PAN) ultrafiltration membrane as substrate membrane, polyethylene-imine (PEI) and sodium polystyrene sulfonate (PSS) as cationic and anionic polyelectrolytes, respectively. The impact of preparation conditions on the performance of the prepared membrane was extensively studied. Optimal preparation conditions were obtained, the concentrations of both PEI and PSS polyelectrolyte solutions are 1.00g/L, the NaCl concentration in each polyelectrolyte solutions is 0.50M, the CuCl2 concentration in PSS solutions is 0.20M, the pH of PEI solution is 9.0, and the deposition time in each polyelectrolyte solution is 10 min. Under the optimal preparation conditions, the pure water permeation flux can reach 16.11LMH, and the reverse salt permeation flux can decrease down to 1.47gMH using 0.50M MgCl2 as draw solution and DI water as feed solution.

Funds：

AuthorIntro：

魏桐（1989~），内蒙古包头人，硕士研究生，研究方向：正渗透膜制备与应用技术

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