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Effect of polyethylene glycol additive on the structure and performance of Mg(OH)2/PES hybrid membranes

Authors： CUI Shasha, HAN Senjian, MAO Lili, WANG Haizeng

Units： Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100

KeyWords： Polyethylene glycol (PEG), Nano-Magnesium hydroxide (Mg(OH)2), Hybrid membranes, Surface hydrophilicity, Antifouling property

ClassificationCode：TQ028.8；TB383.2

year,volume(issue):pagination： 2019,39(1):1-8

Abstract：

Magnesium hydroxide(Mg(OH)2)/ Polyethersulfone (PES) organic-inorganic hybrid membrane was prepared through phase inversion method, mentioning that Mg(OH)2 was in-suit synthesized. Using polyethylene glycol (PEG-400) as a dispersant, the Mg(OH)2/PES hybrid membrane presents high performance of permeability and anti-fouling. FTIR and SEM analysis were performed, and the permeation flux, BSA retention rate, the surface hydrophilicity, porosity, and antifouling property of the membrane were investigated. The results indicated that not only PEG-400 can affect the pore structure of the prepared membrane, but also the oxygen atoms of PEG-400 can coordinate with the Mg2+, which promoted the dispersion of Mg2+ in the polymer system, and reduced the agglomeration of the nanoparticles. Additionally, taking all the tested performance into consideration, when the dosage of PEG 400 was 8%, the hybrid Mg(OH)2/PES membrane had the best performance: pure water flux was 188 L/(m2·h), rejection rate was 98%, and recovery flux ratio was 80.56%.

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