新型荷正电PVC微滤膜的制备及去除Cr(Ⅵ)性能

doi:10.11896/cldb.20030185

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Abstract Poly (vinyl chloride-co-dimethylaminoethyl methacrylate) (PVD) was added into polyvinyl chloride (PVC) matrix, following with the tertiary amine groups of PVD in the casting solution in-situ quaternized by methyl iodide (CH₃I) at 60 ℃, then a novel strong positively charged PVC/PVD (M1) microfiltration membrane was prepared by non-solvent induced phase separation (NIPS) process. The PVC (M0) microfiltration membrane was also prepared and compared with M1. The morphologies, pore size, charge, hydrophilicity and pure water flux of M0 and M1 were characterized. The removal of trace Cr(Ⅵ)(Cr₂O₇^2-) from aqueous solution via micellar-enhanced filtration and the effect of Cr(Ⅵ)concentration, pH and sodium chloride (NaCl) concentration on Cr(Ⅵ)removal with cationic surfactant stearyl trimethyl ammonium chloride (STAC) were studied. The results showed that the rejection of Cr(Ⅵ)removal by micellar-enhanced filtration for M1 was close to 100%. When the molar ratio of Cr(Ⅵ)/STAC was greater than 0.478, the rejection of Cr(Ⅵ)for M1 decreased with the increase of Cr(Ⅵ)concentration. The pH of the separation system had little effect on the rejection of Cr(Ⅵ)for M1. High feed concentration of NaCl was very harmful to the rejection of Cr(Ⅵ). It can be seen that the M1 has potential development prospects in the treatment of wastewater containing Cr(Ⅵ)heavy metal ions.

Key words： positively charged poly(vinyl chloride-co-dimethylaminoethyl methacrylate) heavy metal ion microfiltration membrane micellar-enhanced filtration

Published: 07 September 2021

CLC number:

TQ028.8

Fund:National Key R & D Program of China (2017YFE0114100) and Science and Technology Innovation Group of Xin-xiang University(XXUTD20170111).

About author:: Yanxin Xiereceived his B. E. degree in chemical engineering and technology and Ph. D. degree in chemical technology from Zhengzhou University in Jul.2005—Jul.2012. He was appointed to the postdoctoral upon graduation and acquired the award of Excellent Postdoctoral of Sinopec Zhongyuan Oilfield. He is currently a lecturer of the Xinxiang University from Jun.2015. He has published more than 10 journal papers, applied 7 national invention patents and 3 of them were authorized. His research interests focus on the functional separation membrane materials, membrane separation technology.
Baoku Zhureceived his Ph. D. degree in Zhejiang University (ZJU). He was a lecturer of ZJU from Sep. 2001. In 2007, he became a chair professor and doctoral supervisor. He has published more than 200 journal papers, applied 60 national invention patents and 26 of them were authorized. Mainly engaged in design and synthesis of amphiphilic polymers, design and preparation of polymer membrane materials, lithium ion battery diaphragm and lithium ion electrolyte, membrane separation technology research. He has presided over more than 20 projects such as the Natural Science Foundation of China, National 973/863 project/sub-project, key projects of Zhejiang Science and Technology Plan, et al. He had win 3 provincial and ministerial level Science and Technology Progress Awards, and trained more than 20 postgraduates.

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	XIE Yanxin
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Cite this article:

XIE Yanxin,YANG Qian,CHEN Yaxian, et al. Preparation of Novel Positively Charged PVC Microfiltration Membrane and Its Performance for Removing Cr(Ⅵ)[J]. Materials Reports, 2021, 35(16): 16184-16189.

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http://www.mater-rep.com/EN/10.11896/cldb.20030185 OR http://www.mater-rep.com/EN/Y2021/V35/I16/16184

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