Bilayer Compounded Polytetrafluoroethylene Membrane for Enhanced Oil-Water Emulsion Separation

Yu-Liang Yang; Tai-Ran Zhang; Yan-Ting Han; Shao-Yun Guo; Qin-Gong Rong; Jia-Bin Shen

doi:10.1007/s10118-024-3107-7

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Bilayer Compounded Polytetrafluoroethylene Membrane for Enhanced Oil-Water Emulsion Separation

RESEARCH ARTICLE | Updated：2024-05-11

- Bilayer Compounded Polytetrafluoroethylene Membrane for Enhanced Oil-Water Emulsion Separation
- Chinese Journal of Polymer Science Vol. 42, Issue 6, Pages: 838-850(2024)
- Affiliations：
  
  a.State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology, Chengdu 610065, China
  b.West China Hospital/West China School of Nursing, Sichuan University, Chengdu 610041, China
  c.Shandong Senrong New Materials Co., Ltd., Zibo 256401, China
- Author bio：
  
  shenjb@scu.edu.cn
- Funds：
- DOI：10.1007/s10118-024-3107-7
  CLC：
- Published：1 June 2024，
  
  Published Online：3 April 2024，
  
  Received：21 December 2023，
  
  Revised：8 February 2024，
  
  Accepted：22 February 2024
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Yang, Y. L.; Zhang, T. R.; Han, Y. T.; Guo, S. Y.; Rong, Q. G.; Shen, J. B. Bilayer compounded polytetrafluoroethylene membrane for enhanced oil-water emulsion separation. Chinese J. Polym. Sci. 2024, 42, 838–850

Yu-Liang Yang, Tai-Ran Zhang, Yan-Ting Han, et al. Bilayer Compounded Polytetrafluoroethylene Membrane for Enhanced Oil-Water Emulsion Separation. [J]. Chinese Journal of Polymer Science 42(6):838-850(2024)
Yang, Y. L.; Zhang, T. R.; Han, Y. T.; Guo, S. Y.; Rong, Q. G.; Shen, J. B. Bilayer compounded polytetrafluoroethylene membrane for enhanced oil-water emulsion separation. Chinese J. Polym. Sci. 2024, 42, 838–850 DOI： 10.1007/s10118-024-3107-7.

Yu-Liang Yang, Tai-Ran Zhang, Yan-Ting Han, et al. Bilayer Compounded Polytetrafluoroethylene Membrane for Enhanced Oil-Water Emulsion Separation. [J]. Chinese Journal of Polymer Science 42(6):838-850(2024) DOI： 10.1007/s10118-024-3107-7.

摘要

In pursuit of an ideal emulsion separation membrane that combines high separation efficiency and mechanical properties

a bilayer compounded membrane was fabricated by electrospinning polytetrafluoroethylene (fPTFE) emulsion onto an ePTFE substrate. The compounded membrane possesses the superior separation performance of fPTFE alongside the mechanical properties of ePTFE

showing comprehensive performances.

Abstract

In order to achieve efficient and durable oil-water emulsion separation

the membranes possessing high separation efficiency and mechanical strength attract extensive attention and are in great demand. In present study

a kind of polytetrafluoroethylene (PTFE)-based bilayer membrane was fabricated by electrospinning fibrous PTFE (fPTFE) on an expanded PTFE (ePTFE) substrate. The morphological observation revealed that the fibrous structure of the fPTFE layer could be tailored by controlling the formulation of spinning solution. The addition of appropriate polyoxyethylene (PEO) would make the fibers in the fPTFE layer finer and more uniform. As a result

the compounded membrane exhibited a small pore size of approximately 1.25 μm and a substantial porosity nearing 80%. This led to super-hydrophobicity

characterized by a high water contact angle (WCA) of 149.8°

and facilitated rapid oil permeation. The water-in-oil emulsion separation experiment further confirmed that the compounded membrane not only had a high separation efficiency closing 100%

but such an outstanding separation capacity could be largely retained

either through multiple cycles of use or through strong acid (pH=1)

strong alkali (pH=12)

or high-temperature (100 °C) treatment. Additionally

the mechanical behavior of the bilayer membrane was basically contributed by that of each layer in terms of their volume ratio. More significantly

the poor creep resistance of fPTFE layer was suppressed by compounding with ePTFE substrate. Hence

this study has laid the groundwork for a novel approach to create PTFE-based compounded membranes with exceptional overall characteristics

showing promise for applications in the realm of emulsion separation.

关键词

Keywords

ePTFEElectrospinning membraneBilayer compoundingEmulsion separation

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