Morphology Evolution of Poly(vinylidene fluoride) Membranes during Supercritical CO2 Assisted Phase Inversion

Yan-hui Xiang; Fu Liu; Li-xin Xue; Jian-hui Shen; Hai-bo Lin

doi:10.1007/s10118-014-1554-2

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Morphology Evolution of Poly(vinylidene fluoride) Membranes during Supercritical CO2 Assisted Phase Inversion

Updated：2021-06-21

- Morphology Evolution of Poly(vinylidene fluoride) Membranes during Supercritical CO2 Assisted Phase Inversion
- Morphology Evolution of Poly(vinylidene fluoride) Membranes during Supercritical CO₂ Assisted Phase Inversion
- Chinese Journal of Polymer Science 2014年32卷第12期页码：1628-1638
- Affiliations：
  
  Ningbo Institute of Materials technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Author bio：
  
  **Fu Liu (刘富), E-mail: fu.liu@nimte.ac.cn
  Li-xin Xue (薛立新), E-mail: xuelx@nimte.ac.cn
- Funds：
  
  National Natural Science Foundation of China(51273211);National High Technology Research and Development Program (863 program) of China(2012AA03A605);international cooperation project from Ministry of Science and Technology of China(2012DFR50470)
- DOI：10.1007/s10118-014-1554-2
  中图分类号：
- 收稿：2014-03-05，
  
  修回：2014-05-20，
  
  录用：2014-05-29，
  
  纸质出版：2014-12
- Accepted：
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Yan-hui Xiang, Fu Liu, Li-xin Xue, 等. Morphology Evolution of Poly(vinylidene fluoride) Membranes during Supercritical CO2 Assisted Phase Inversion[J]. Chinese Journal of Polymer Science, 2014,32(12):1628-1638.

Yan-hui Xiang, Fu Liu, Li-xin Xue, et al. Morphology Evolution of Poly(vinylidene fluoride) Membranes during Supercritical CO₂ Assisted Phase Inversion[J]. Chinese Journal of Polymer Science, 2014, 32(12): 1628-1638. DOI: 10.1007/s10118-014-1554-2.
Yan-hui Xiang, Fu Liu, Li-xin Xue, 等. Morphology Evolution of Poly(vinylidene fluoride) Membranes during Supercritical CO2 Assisted Phase Inversion[J]. Chinese Journal of Polymer Science, 2014,32(12):1628-1638. DOI： 10.1007/s10118-014-1554-2.

Yan-hui Xiang, Fu Liu, Li-xin Xue, et al. Morphology Evolution of Poly(vinylidene fluoride) Membranes during Supercritical CO₂ Assisted Phase Inversion[J]. Chinese Journal of Polymer Science, 2014, 32(12): 1628-1638. DOI: 10.1007/s10118-014-1554-2. DOI：

摘要

Abstract

A supercritical carbon dioxide (ScCO

) assisted phase inversion was developed to produce microporous poly(vinylidene fluoride) (PVDF) membranes whose morphology characteristics arise from both liquid-liquid demixing and solid-liquid demixing (crystallization). This result was confirmed by Fourier transform infrared spectroscopy (FTIR)

from which both

and

crystals were found. As revealed by contact angle experiment

the PVDF membranes prepared via ScCO

assisted phase inversion were more hydrophobic compared with the control membrane produced via conventional immersion-precipitation technique. In particular

the sample with 15 wt% PVDF prepared at 45 ℃ and 13 MPa exhibited a contact angle of 142°

which was mainly caused by the multilevel micro- and nano- structure. The effects of polyethylene glycol (PEG)

polyvinyl pyrrolidone (PVP) and lithium chloride (LiCl) on the structures and crystal form were investigated. PVP promoted the formation of

phase crystal form

while PEG boosts the evolution of

phase. LiCl restrained the crystallization degree of PVDF membrane under ScCO

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