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	Effects of annealing on the physico-chemical structure and permeation performance of novel hybrid membranes of poly(vinyl alcohol)/gamma-aminopropyl-triethoxysilane
	Zhang, Qiu Gen ; Liu, Qing Lin ; Liu QL(刘庆林) ; Jiang, Zhong Ying（ Nanjing Univ, Dept Phys） ; Ye, Li Yi ; Zhang, Xiu Hua
	2007-06
关键词	diffusion annealing hybrid membranes pervaporation interaction parameter PVA
英文摘要	Novel organic-inorganic hybrid membranes of poly(vinyl alcohol) (PVA)/gamma-aminopropyl-triethoxysilane (APTEOS) were prepared through a sol-gel approach in this study. The PVA/APTEOS hybrid membranes were characterized by a wide angle X-ray diffractometer (WXRD), scanning electronic microscope (SEM), themogravimetric analysis (TGA) and a contact angle meter to elucidate the effect of annealing temperature and time on the structure of the hybrid membranes. The swelling of the annealed hybrid membranes in an aqueous ethanol solution was investigated, and permeation performance of the annealed hybrid membranes was studied by pervaporation (PV) of 85 wt% ethanol aqueous solution. With annealing temperature or time increasing, both the swelling degree and the permeation flux of the hybrid membranes decreased, while water permselectivity increased. The interaction parameter of water with the membrane chi(13), and ethanol with the membrane chi(23) increased with annealing temperature and time increasing. The relation of the free volume with the permeation properties of the annealed hybrid membranes was studied by positron annihilation lifetime spectroscopy (PALS). And the diffusion behavior of water and ethanol in an aqueous ethanol solution through the hybrid membranes was analyzed by Maxwell-Stefan equation. (C) 2007 Elsevier Inc. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1016/j.micromeso.2007.06.026]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Zhang, Qiu Gen,Liu, Qing Lin,Liu QL,et al. Effects of annealing on the physico-chemical structure and permeation performance of novel hybrid membranes of poly(vinyl alcohol)/gamma-aminopropyl-triethoxysilane[J],2007.
APA	Zhang, Qiu Gen,Liu, Qing Lin,刘庆林,Jiang, Zhong Ying,Ye, Li Yi,&Zhang, Xiu Hua.(2007).Effects of annealing on the physico-chemical structure and permeation performance of novel hybrid membranes of poly(vinyl alcohol)/gamma-aminopropyl-triethoxysilane..
MLA	Zhang, Qiu Gen,et al."Effects of annealing on the physico-chemical structure and permeation performance of novel hybrid membranes of poly(vinyl alcohol)/gamma-aminopropyl-triethoxysilane".(2007).

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