Nanofiltration Property of pH-Responsive Ethylene-co-Vinyl Alcohol Copolymer Membrane

被引：0
|
作者：
Ye H. [1 ]
Li W. [1 ]
Zhang Y. [1 ]
Yu T. [1 ]
Zhao L. [1 ]
Xin Q. [1 ]
Wang S. [1 ]
Li H. [1 ]
机构：
[1] State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2017年 / 33卷 / 08期
关键词：
Ethylene-co-vinyl alcohol copolymer; Nanofiltration; PH-responsive membrane; Ultrafiltration;
D O I：
10.16865/j.cnki.1000-7555.2017.08.015
中图分类号：
学科分类号：
摘要：
The pH-responsive membrane with nanofiltration property has wide prospect for separating mixtures with low-molecular-weight. In this paper, the pH-responsive ethylene-co-vinyl alcohol copolymer (EVAL) membrane was prepared by grafting dimethylaminoethyl methacrylate onto EVAL ultrafiltration membrane, of which the polymer concentration is 25%. The nanofiltration property (the rejection of PEG and inorganic salt) was investigated. The results show that the rejection of PEG and inorganic salt are both higher than unmodified membrane when pH is lower than pKa. The rejection of PEG 800, PEG 1000 and PEG 2000 of membrane with GD 6% is higher than 90%. The rejections of bivalent cations are higher than 80%. The rejection order of inorganic salt is CaCl2>MgCl2>MgSO4>NaCl>Na2SO4. The rejection of PEG and inorganic salt decrease significantly when the pH value is higher than pKa. The rejection of PEG 1000 decreases from 95.6% to 62.9%. The rejection of MgCl2 decreases to 30.6%. The pH-responsive properties of rejection and flux are observed. © 2017, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：79 / 84
页数：5
相关论文
共 10 条
  • [1] Liu Z., Wang W., Xie R., Et al., Stimuli-responsive smart gating membranes, Chem. Soc. Rev., 3, pp. 460-475, (2016)
  • [2] Weng X.D., Bao X.J., Jiang H.D., Et al., pH-responsive nanofiltration membranes containing carboxybetaine with tunable ion selectivity for charge-based separations, J. Membr. Sci., 520, pp. 294-302, (2016)
  • [3] Himstedt H.H., Marshall K.M., Wickramasinghe S.R., pH-responsive nanofiltration membranes by surface modification, J. Membr. Sci., 366, pp. 373-381, (2011)
  • [4] Ng L.Y., Mohammad A.W., Ng C.Y., A review on nanofiltration membrane fabrication and modification using polyelectrolytes: effective ways to develop membrane selective barriers and rejection capability, Adv. Colloid Interface Sci., 197-198, pp. 85-107, (2013)
  • [5] Paul M., Jons S.D., Chemistry and fabrication of polymeric nanofiltration membranes: a review, Polymer, 103, pp. 417-456, (2016)
  • [6] Du R., Zhao J., Properties of poly(N,N-dimethylaminoethyl methacrylate)/polysulfone positively charged composite nanofiltration membrane, J. Membr. Sci., 239, pp. 183-188, (2004)
  • [7] Ye H., Chen L., Li A., Et al., Alkali-responsive membrane prepared by grafting dimethylaminoethyl methacrylate onto ethylene vinyl alcohol copolymer membrane, J. Appl. Polym. Sci., 132, (2015)
  • [8] Liu Q., Ye H., Zhang Y.Z., Et al., Preparation and protein separation property of poly(ethylene-co-vinyl alcohol) ultrafiltration membrane, Polymer Materials Science & Engineering, 32, 12, pp. 145-150, (2017)
  • [9] Shan T.M., Ye H., Li W.R., Et al., pH-responsive and protein separation properties of intellegent switch ethylene-co-vinyl alcohol copolymer membrane, Polymer Materials Science & Engineering, 32, 8, pp. 125-130, (2016)
  • [10] Ye H., Huang L., Li W., Et al., Protein adsorption and desorption behavior of a pH-responsive membrane based on ethylene vinyl alcohol copolymer, RSC Adv., 7, pp. 21398-21405, (2017)
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