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Effect of structure of PVDF membranes on the performance of membrane distillation

類別:期刊論文

學年 / 學期:102-1

出版日期:2013-10-05 00:00:00

著者:Hsu-Hsien Chang; Chih-Hao Tsai; Hao-Cheng Wei; Liao-Ping Cheng

著錄名稱、卷期、頁數:Membrane Water Treatment 5(1), p.41-56

摘要:A series of microporous PVDF membranes were prepared by isothermal immersion-precipitation of PVDF/TEP casting dopes in both soft and harsh coagulation baths. Morphologies of the membranes’ top surfaces were found to depend strongly on the bath strength, which could be controlled by the TEP content in the bath. By changing the bath gradually from pure water to 70% TEP, the top surface evolved from a dense skin-like (asymmetric) to a totally open porous morphology (symmetric). The latter structure could similarly be obtained by precipitation of the same dope in an alcoholic bath, e.g., 1-butanol. Membrane distillation processes to desalt sodium chloride aqueous solutions were conducted using various prepared membranes and two commercial microporous membranes, PTFE (Toyo, Japan, code: J020A330R) and PVDF (GE, USA, code: YMJWSP3001). The permeation fluxes were compared and correlated with the morphologies of the tested membranes.

關鍵字:microporous membrane;PVDF;membrane distillation

語言:en

ISSN:2005-8624; 2092-7037

期刊性質:國外

收錄於:SCI

審稿制度:

國別:KOR

出版型式:電子版,紙本