Journal of Coatings Technology and Research

, Volume 15, Issue 5, pp 1013–1023 | Cite as

Facile fabrication of superhydrophilic and underwater superoleophobic chitosan–polyvinyl alcohol-TiO2 coated copper mesh for efficient oil/water separation

  • Qiuying You
  • Guoxia RanEmail author
  • Chan Wang
  • Yuan Zhao
  • Qijun SongEmail author


Organic–inorganic hybrid membranes are attractive material for oil/water separation. Here, a hydrophilic and oleophobic membrane was prepared by coating chitosan (CTS) and polyvinyl alcohol (PVA) on the surface of copper mesh using glutaraldehyde (GA) as crosslinking agent. After introduction of TiO2 nanoparticles, the surface roughness of the composite film was increased and a superhydrophilicity and underwater superoleophobicity surface was obtained due to the enhancement in wettability. The as-prepared superhydrophilic membrane was characterized by SEM, FTIR, XRD, and its surface wetting behavior was measured by contact angle meter. The effect of CTS, PVA, GA, and TiO2 on the microstructure, underwater oil contact angle, and sliding angle was comprehensively evaluated. Then, the super hydrophilic membrane was used for oil/water separation, a separation efficiency (> 99.7%) was obtained with a flux rate of 16,000 L m−2 h−1. The intrusion pressures for all tested oils that the membrane can support are above 1.0 kPa. Significantly, the super hydrophilic membrane exhibited good antiabrasion and anticorrosive properties. After repeated use for 60 times, the separating performances and average permeate fluxes showed no obvious degradation.

Graphical abstract

An organic-inorganic hybrid chitosan (CTS)–polyvinyl alcohol (PVA)-TiO2 coated copper mesh with superhydrophilicity–underwater superoleophobicity was fabricated by one-step solution immersion method and can be used for efficient oil/water separation.


Underwater superoleophobic Chitosan Polyvinyl alcohol TiO2 Oil/water separation Anticorrosive membrane 



This work was supported by the National Natural Science Foundation of China (Grant 21175060), and Prospective Joint Research Project: Cooperative Innovation Fund (No. 2050205.1028).

Supplementary material

11998_2017_36_MOESM1_ESM.docx (634 kb)
Supplementary material 1 (DOCX 633 kb)


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Copyright information

© American Coatings Association 2018

Authors and Affiliations

  1. 1.Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material EngineeringJiangnan UniversityWuxiChina

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