Effect of Solvents on Morphology and Polymorphism of Polyvinylidene Fluoride Membrane via Supercritical CO2 Induced Phase Separation

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	Effect of Solvents on Morphology and Polymorphism of Polyvinylidene Fluoride Membrane via Supercritical CO2 Induced Phase Separation
	Xiang, Yanhui ; Xue, Lixin ; Shen, Jianhui ; Lin, Haibo ; Liu, Fu
刊名	JOURNAL OF APPLIED POLYMER SCIENCE
	2014
卷号	131 期号:22
中文摘要	Poly vinylidene fluoride (PVDF) membranes were prepared via supercritical CO2 induced phase separation. The effects of solvent power on PVDF membrane morphology and polymorphism were investigated using N-N-dimethylformamide (DMF), triethyl phosphate (TEP), and their mixture respectively. The morphology evolution including cross-section and surfaces were thoroughly studied by scanning electron microscope (SEM) and atomic force microscopy (AFM). The differences of solubility parameters between the solvent and PVDF affected the phase separation and the resultant morphology. The various crystalline phases of the membranes were mainly investigated by Fourier transform infrared spectroscopy (FTIR) and X-ray diffractometer (XRD). Solvent with larger dipole moment tended to form polar beta phase. Decreasing the difference of solubility parameters favored the formation of alpha phase. Furthermore, the effects of salt additive on PVDF membrane morphology and crystalline form were studied as well. Results turned out that lithium chloride (LiCl) induced a porous top surface and boosted the formation of beta phase. (C) 2014 Wiley Periodicals, Inc.
公开日期	2015-09-20
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/11681]
专题	宁波材料技术与工程研究所_2014专题
推荐引用方式 GB/T 7714	Xiang, Yanhui,Xue, Lixin,Shen, Jianhui,et al. Effect of Solvents on Morphology and Polymorphism of Polyvinylidene Fluoride Membrane via Supercritical CO2 Induced Phase Separation[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2014,131(22).
APA	Xiang, Yanhui,Xue, Lixin,Shen, Jianhui,Lin, Haibo,&Liu, Fu.(2014).Effect of Solvents on Morphology and Polymorphism of Polyvinylidene Fluoride Membrane via Supercritical CO2 Induced Phase Separation.JOURNAL OF APPLIED POLYMER SCIENCE,131(22).
MLA	Xiang, Yanhui,et al."Effect of Solvents on Morphology and Polymorphism of Polyvinylidene Fluoride Membrane via Supercritical CO2 Induced Phase Separation".JOURNAL OF APPLIED POLYMER SCIENCE 131.22(2014).