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 postcasting heat-treatment on the structure and properties of semicrystalline phase-inversion poly(vinylidene fluoride) membranes
學年98
學期1
出版(發表)日期2009/10/01
作品名稱Effect of postcasting heat-treatment on the structure and properties of semicrystalline phase-inversion poly(vinylidene fluoride) membranes
作品名稱(其他語言)
著者Lin, Dar-Jong; Chang, Hsu-Hsien; Konstantinos Beltsios; Don, Trong-Ming; Jeng, Yi-Su; Cheng, Liao-Ping
單位淡江大學化學工程與材料工程學系
出版者Hoboken: John Wiley & Sons, Inc.
著錄名稱、卷期、頁數Journal of Polymer Science Part B: Polymer Physics 47(19), pp.1880–1893
摘要Microporous PVDF membranes were prepared by immersion-precipitation in 1-octanol of casting dopes dissolved at different temperatures, with dissolution temperature affecting strongly the membrane microstructure. The effect of postcoagulation thermal annealing, which is an additional thermal parameter, on membrane microstructure and properties is probed herein. Membranes obtained were annealed at temperatures up to 160 °C, which is close to the melting point of PVDF polymer. Annealing leads to a substantial modification of the nano-scale fine structure of the membranes, while the overall-microporous structure is preserved. At elevated annealing temperatures, nano-grains, fibrils, and stick-like crystalline entities gradually eclipse, while globules develop more robust connections based on wide bands of crystal elements. Probing by X-ray diffraction and dynamic scanning calorimetry shows that crystallinity increases when annealing temperature and time are increased. As regards mechanical properties, the tensile strength of the membranes can be enhanced substantially, up to about 10 times, upon appropriate high temperature prolonged annealing.
關鍵字annealing; melting point; membranes; microstructure; X-ray
語言英文
ISSN0887-6266; 1099-0488
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者Cheng, Liao-Ping
審稿制度
國別美國
公開徵稿
出版型式電子版
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