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 inner non-solvent condition on morphology of PVDF hollow fiber membranes prepared by NIPS spinning process
學年106
學期2
出版(發表)日期2018/03/01
作品名稱Effect of inner non-solvent condition on morphology of PVDF hollow fiber membranes prepared by NIPS spinning process
作品名稱(其他語言)
著者Hsu-Hsien Chang; Sheng-Chang Chen; Liao-Ping Cheng
單位
出版者
著錄名稱、卷期、頁數Journal of Applied Science and Engineering 21(1), p.89-98
摘要Hollow fiber membranes of PVDF were prepared by isothermal wet spinning process from the
water/DMF/PVDF system at 25 C. The dope solution comprised 21 wt% PVDF in DMF, and pure
water was employed both as the inner and outer coagulants. SEM imaging of the membrane indicated
an unexpected interesting morphology: columnar macrovoids extended from the outer surface to the
central region, while cellular pores constituted the inner half of the membrane. As water was a harsh
nonsolvent, one tended to think that macrovoids shall form towards the inner surface of the hollow
fiber. Absence of macrovoids in this region was explained based on the fact that DMF would
accumulate rapidly in the inner extruding stream as it underwent mass-exchange with water in the
inner bath. Such activity rendered effectively the coagulant became effectively a soft one. As a result,
macrovoids was eliminated and the inner surface became porous.
關鍵字PVDF;Hollow Fiber;Membrane;Morphology;NIPS
語言英文
ISSN
期刊性質國內
收錄於ESCI;
產學合作
通訊作者Liao-Ping Cheng
審稿制度
國別中華民國
公開徵稿
出版型式,電子版,紙本
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