Preparation of pH-responsive membranes with amphiphilic copolymers by surface segregation method

Yanlei Su; Yuan Liu; Xueting Zhao; Yafei Li; Zhongyi Jiang

doi:10.1016/j.cjche.2015.05.013

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Preparation of pH-responsive membranes with amphiphilic copolymers by surface segregation method

分离科学与工程 | Updated：2026-01-06

- Preparation of pH-responsive membranes with amphiphilic copolymers by surface segregation method
- Chinese Journal of Chemical Engineering Vol. 23, Issue 8, Pages: 1283-1290(2015)
- Affiliations：
  
  2 Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University,Tianjin,China,300072
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2015.05.013
  CLC：
- Published：2015
- Accepted：
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Yanlei Su, Yuan Liu, Xueting Zhao, Yafei Li, Zhongyi Jiang. Preparation of pH-responsive membranes with amphiphilic copolymers by surface segregation method[J]. Chin.J.Chem.Eng., 2015, 23(8): 1283-1290.
DOI：

Yanlei Su, Yuan Liu, Xueting Zhao, Yafei Li, Zhongyi Jiang. Preparation of pH-responsive membranes with amphiphilic copolymers by surface segregation method[J]. Chin.J.Chem.Eng., 2015, 23(8): 1283-1290. DOI： 10.1016/j.cjche.2015.05.013.

摘要

Abstract

Novel pH-responsive membranes were prepared by blending pH-responsive amphiphilic copolymers with polyethersulfone (PES) via a nonsolvent-induced phase separation (NIPS) technique. The amphiphilic copolymers bearing Pluronic F127 and poly(methacrylic acid) (PMAA) segments

abbreviated as PMAA

-F127-PMAA

were synthesized by free radical polymerization. The physical and chemical properties of the blend membranes were evaluated by scanning electronmicroscopy (SEM)

Fourier transform infrared (FTIR) spectrum

water contact angle

Zeta potential and X-ray photoelectron spectroscopy (XPS). The enrichment of hydrophilic PMAA segments on the membrane surfaces was attributed to surface segregation during the membrane preparation process. The blend membranes had significant pH-responsive properties due to the conformational changes of surface-segregated PMAA segments under different pH values of feed solutions. Fluxes of the blend membranes were larger at lowpH values of feed solutions than that at high pH values. The pH-responsive ability of themembranes was enhanced with the increase of the degree of PMAA near-surface coverage.

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