An improved model for mass transfer during the formation of polymeric membranes by the immersion-precipitation process

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/44201

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题名:	An improved model for mass transfer during the formation of polymeric membranes by the immersion-precipitation process
作者:	Cheng, Liao-ping;Soh, Young S.;Dwan, An-hwa;Gryte, Carl C.
贡献者:	淡江大學化學工程與材料工程學系
关键词:	membrane;immersion;precipitation;cellulose acetate;ternary;diffusion
日期:	1994-06
上传时间:	2010-03-09 10:02:19 (UTC+8)
出版者:	New York : Wiley-Blackwell
摘要:	An analysis is presented, which describes the isothermal ternary diffusion process encountered in the formation of a cellulose acetate polymeric membrane by a direct immersion-precipitation of polymeric solutions in a nonsolvent bath. A material coordinate was employed to derive the mass transfer equations for the membrane solution and the convective mass transfer in the coagulation bath was taken into account by solving the hydrodynamic boundary layer equations. Diffusion coefficients were measured and used to deduce ternary phenomenological coefficients. The computed results are found to agree with the experimental precipitation time and membrane morphologies observed in scanning electron photomicrographs.
關聯:	Journal of polymer science Part B : Polymer physics 32(8), pp.1413-1425
DOI:	10.1002/polb.1994.090320813
显示于类别:	[化學工程與材料工程學系暨研究所] 期刊論文

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