Journal of Materials Science

, Volume 54, Issue 7, pp 5971–5987 | Cite as

EVOH in situ fibrillation and its effect of strengthening, toughening and hydrophilic modification on PVDF hollow fiber microfiltration membrane via TIPS process

  • Zhenyu CuiEmail author
  • Xiuxiu Tang
  • Wei Li
  • Haonan Liu
  • Jing Zhang
  • Hong Wang
  • Jianxin Li


In order to enhance the strength and overcome the poor antifouling capacity of poly(vinylidene fluoride) (PVDF) membrane used in water treatment, herein, poly(ethylene-co-vinyl alcohol) (EVOH) was selected and the PVDF/EVOH blend hollow fiber microfiltration membrane was prepared via the thermally induced phase separation (TIPS) technique. The morphology for the pristine and blend membrane was compared, and the distribution of EVOH on outer surface and within matrix was explored. The fibrous-shaped EVOH enhanced the breaking strength of the membrane markedly (up to 13.63 MPa) due to the in situ fibrillation; especially, when the blend membrane was immersed into water, the internal plasticization of water molecular enhanced the toughness of the membrane and the elongation at break increased up to 86.39% compared with 27.63% for the corresponding dry membrane and 36.62% for the pristine membrane, respectively. The addition of EVOH introduced hydroxyl group into the bulk and thus endowed the membrane with a better hydrophilicity (the contact angle is as low as 43°) and higher pure water flux (up to 449.11 L m−2 h−1) compared with pristine PVDF membrane. Moreover, the blend membrane showed a better rejection of carbonic particle (nearly 100%) and higher flux recovery rate (up to 87.30%). The present investigation offers an effective and simple pattern to regulate microstructure and enhance mechanical strength, flux and hydrophilicity of the polymeric microfiltration membrane via the TIPS process for water treatment.



This work was supported by the National Nature Foundation of China (No. 21576209), Applied Basic Research and Advanced Technology Programs of Science and Technology Commission Foundation of Tianjin (No. 16PTSYJC00100) and the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) of Ministry of Education of China (No. IRT-17R80).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10853_2018_3281_MOESM1_ESM.doc (3.8 mb)
Supplementary material 1 (DOC 3870 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Separation Membranes, School of Material Science and EngineeringTianjin Polytechnic UniversityTianjinPeople’s Republic of China
  2. 2.School of Computer Science and Software EngineeringTianjin Polytechnic UniversityTianjinPeople’s Republic of China

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