

FOLLOWUS
Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China
xpxiong@xmu.edu.cn
Received:19 August 2019,
Revised:2020-10-10,
Accepted:11 November 2020,
Online First:02 December 2020,
Published:01 January 2021
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Huo, P.; Zhong, C. T.; Xiong, X. P. Tailoring morphology of PVDF-HFP membrane , via, one-step reactive vapor induced phase separation for efficient oil-water separation. Chinese J. Polym. Sci. 2021, 39, 610–619
Peng Huo, Cheng-Tang Zhong, Xiao-Peng Xiong. Tailoring Morphology of PVDF-HFP Membrane
Huo, P.; Zhong, C. T.; Xiong, X. P. Tailoring morphology of PVDF-HFP membrane , via, one-step reactive vapor induced phase separation for efficient oil-water separation. Chinese J. Polym. Sci. 2021, 39, 610–619 DOI: 10.1007/s10118-021-2527-x.
Peng Huo, Cheng-Tang Zhong, Xiao-Peng Xiong. Tailoring Morphology of PVDF-HFP Membrane
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.
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