Tailoring Morphology of PVDF-HFP Membrane <italic style="font-style: italic">via</italic> One-step Reactive Vapor Induced Phase Separation for Efficient Oil-Water Separation

Peng Huo; Cheng-Tang Zhong; Xiao-Peng Xiong

doi:10.1007/s10118-021-2527-x

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Tailoring Morphology of PVDF-HFP Membrane via One-step Reactive Vapor Induced Phase Separation for Efficient Oil-Water Separation

ARTICLE | Updated：2020-12-02

- Tailoring Morphology of PVDF-HFP Membrane via One-step Reactive Vapor Induced Phase Separation for Efficient Oil-Water Separation
- Chinese Journal of Polymer Science Vol. 39, Issue 5, Pages: 610-619(2021)
- Affiliations：
  
  1.Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China
- Author bio：
  
  xpxiong@xmu.edu.cn
- Funds：
- DOI：10.1007/s10118-021-2527-x
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Peng Huo, Cheng-Tang Zhong, Xiao-Peng Xiong. Tailoring Morphology of PVDF-HFP Membrane via One-step Reactive Vapor Induced Phase Separation for Efficient Oil-Water Separation. [J]. Chinese Journal of Polymer Science 39(5):610-619(2021)
DOI：

Peng Huo, Cheng-Tang Zhong, Xiao-Peng Xiong. Tailoring Morphology of PVDF-HFP Membrane via One-step Reactive Vapor Induced Phase Separation for Efficient Oil-Water Separation. [J]. Chinese Journal of Polymer Science 39(5):610-619(2021) DOI： 10.1007/s10118-021-2527-x.

摘要

Abstract

Poly(vinylidene fluoride-,co,-hexafluoropropylene) (PVDF-HFP) receives increasing attention in membrane separation field based on its advantages such as high mechanical strength, thermal and chemical stability. However, controlling the microporous structure is still challenging. In this work, we attempted to tailor the morphology of PVDF-HFP membrane ,via, a one-step reactive vapor induced phase separation method. Namely, PVDF-HFP was dissolved in a volatile solvent and then was cast in an ammonia water vapor atmosphere. After complete evaporation of solvent, membranes with adjustable porous structure were prepared, and the microstructures of the membranes were analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction characterizations. Based on the results, a mechanism of dehydrofluorination induced cross-linking of PVDF-HFP has been suggested to understand the morphology tailoring. To our knowledge, this is the first report of one-step reactive vapor induced phase separation strategy to tailor morphology of PVDF-HFP membrane. In addition, the membranes prepared in the ammonia water vapor exhibited enhanced mechanical strength and achieved satisfactory separation efficiency for water-in-oil emulsions, suggesting promising potential.

关键词

Keywords

PVDF-HFPMembraneTailoringVapor induced phase separationOil-water separation

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Tailoring Morphology of PVDF-HFP Membrane via One-step Reactive Vapor Induced Phase Separation for Efficient Oil-Water Separation

DOI：10.1007/s10118-021-2527-x

摘要

Abstract

关键词

Keywords

references