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Branched Polyvinyl Alcohol Hybrid Membrane for Acid Recovery via Diffusion Dialysis
Author(s) -
Cheng Congliang,
Li Ping,
He Yubin,
Hu Xianhai,
Emmanuel Kamana
Publication year - 2019
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800622
Subject(s) - membrane , polyvinyl alcohol , polyvinyl chloride , ammonium chloride , diffusion , chemical engineering , grafting , chemistry , polymer chemistry , dialysis , polymer , ammonium , dialysis tubing , ion exchange , materials science , organic chemistry , ion , medicine , biochemistry , physics , engineering , thermodynamics
A branched polymer was prepared by grafting allyltrimethylammonium chloride onto polyvinyl alcohol (PVA) via free‐radical polymerization. Afterwards, a series of hybrid membranes were prepared by sol‐gel cross‐linking between quaternary ammonium‐PVA and tetraethoxysilane. The obtained membranes were characterized in terms of infrared spectroscopy, ion exchange capacity, water uptake, linear expansion ratio, and acid resistance. The thermal properties of the membranes were investigated as well. The diffusion dialysis performances of the membranes were tested by using a simulated feed solution containing HCl and FeCl 2 . The diffusion dialysis coefficients and the separation factors were much better than those of the commercial DF‐120 membrane.