教師資料查詢 | 類別: 期刊論文 | 教師: 鄭廖平 CHENG, LIAO-PING (瀏覽個人網頁)

標題:Effect of structure of PVDF membranes on the performance of membrane distillation
學年102
學期1
出版(發表)日期2014/01/01
作品名稱Effect of structure of PVDF membranes on the performance of membrane distillation
作品名稱(其他語言)
著者Chang, Hsu-Hsien; Tsai, Chih-Hao; Wei, Hao-Cheng; Cheng, Liao-Ping
單位淡江大學化學工程與材料工程學系
出版者Netherlands: Elsevier BV
著錄名稱、卷期、頁數Membrane Water Treatment 5(1), pp.41-56
摘要Poly(vinylidene fluoride-hexafluoropropylene), PVDF-HFP, hollow fiber membranes were prepared by the dry/wet spinning technique using different copolymer concentrations in the dope solutions ranging from 17 to 24 wt.%. All the spinning parameters were maintained constant except the copolymer concentration. The morphological properties of the hollow fiber membranes were studied in terms of scanning electron microscopy (SEM), atomic force microscopy (AFM) and void volume fraction. The effects of PVDF-HFP content in the spinning solutions were also studied by measuring the water entry pressure and direct contact membrane distillation (DCMD) permeate flux of the hollow fiber membranes. An increase in the copolymer concentration of the spinning solution resulted in a decrease in the precipitation rate and a transition of the cross-section structure from a finger-type structure to a sponge-type structure. Pore size, nodule size and roughness parameters of both the internal and external hollow fiber surfaces were determined by AFM. It was observed that the pore size decreased in both the internal and external surfaces of the hollow fiber membranes with increasing the copolymer concentration and reached a minimum value at the outer surface for PVDF-HFP concentrations greater than 20 wt.%. Water entry pressure values were decreased whereas both the void volume fraction and the DCMD permeate flux increased with decreasing the copolymer concentration.
關鍵字Aqueous Alcohol-Solutions;Poly(Vinylidene Fluoride);Air-Gap;Mechanical-Properties;Separation Process;Size Distribution;Acid Solutions;Water;Ultrafiltration;Desalination
語言英文
ISSN0376-7388
期刊性質國外
收錄於SCI
產學合作
通訊作者
審稿制度
國別韓國
公開徵稿
出版型式電子版
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