Study of Poly(vinylidene fluoride) Flat Sheet Membranes with a Green Thermally Induced Phase Separation Melt Technology

2017 ◽  
Vol 9 (6) ◽  
pp. 911-923
Author(s):  
Zhen Liu ◽  
Pengfei Song ◽  
Daobao Sun ◽  
Qianqian Pan ◽  
Changfa Xiao
Keyword(s):  
Phase Separation ◽  
Vinylidene Fluoride ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced ◽  
Flat Sheet ◽  
Poly Vinylidene Fluoride

Poly(vinylidene fluoride) (PVDF) Membrane Preparation with an Ionic Liquid via Thermally Induced Phase Separation Melt Technology

2014 ◽  
Vol 694 ◽  
pp. 462-465 ◽  
Author(s):  
Zhen Liu ◽  
Dao Bao Sun ◽  
Wen Yang Dong ◽  
Shuan Hu Feng ◽  
Chang Fa Xiao ◽  
...  
Keyword(s):  
Phase Separation ◽  
Vinylidene Fluoride ◽  
Preparation Method ◽  
Thermally Induced Phase Separation ◽  
X Ray Diffraction ◽  
Pvdf Membrane ◽  
Thermally Induced ◽  
X Ray ◽  
Flat Sheet ◽  
Poly Vinylidene Fluoride

Poly(vinylidene fluoride) (PVDF)/1-butyl-2,3-dimethylimidazolium Tetrafluoroborate ([BMMIm][BF4]) flat sheet membranes were made via thermally induced phase separation (TIPS) melt technology, and [BMMIm][BF4]) was used as a diluent. The prepared membranes were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) and etc. Furthermore, [BMMIm][BF4] as a liquid-diluent was effectively recovered by vacuum distillation. In conclusion, this work may provide a green and sustainable preparation method to produce PVDF membranes via TIPS.

Nonisothermal Crystallization Behavior of Poly(vinylidenefluoride)/Polysulfone/Diethylene Glycol Dibenzoate/Dibutyl Phthalate System via Thermally Induced Phase Separation

2015 ◽  
Vol 1120-1121 ◽  
pp. 581-585
Author(s):  
Jing Zhang ◽  
Lu Qi ◽  
Zhen Yu Cui
Keyword(s):  
Phase Separation ◽  
Diethylene Glycol ◽  
Crystallization Behavior ◽  
Dibutyl Phthalate ◽  
Vinylidene Fluoride ◽  
Thermally Induced Phase Separation ◽  
Scanning Calorimetry ◽  
Nonisothermal Crystallization ◽  
Thermally Induced ◽  
Poly Vinylidene Fluoride

Differential scanning calorimetry (DSC) measurement is used to investigate the nonisothermal crystallization behavior of poly (vinylidene fluoride) (PVDF)/polysulfone (PSF)/diethylene glycol dibenzoate (DEDB)/dibutyl phthalate (DBP) system via solid-liquid (S-L) phase separation during a thermally induced phase separation process. The effect of benzene ring in PSF on PVDF crystallization for PVDF/PSF/DEDB/DBP system is investigated. It is found that the Ozawa model can describe nonisothermal crystallization behavior of PVDF/PSF/DEDB/DBP system in a certain crystallization temperature range. Jeziorny method indicates that the secondary crystallization of PVDF exists in the process of nonisothermal crystallization and is enhanced by the increase of cooling rate.

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