出版日期：2018-03-15 00:00:00

著者：Hsu-Hsien Chang; Sheng-Chang Chen; Liao-Ping Cheng

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：en

期刊性質：國內

收錄於：ESCI

通訊作者：Liao-Ping Cheng

審稿制度：是

國別：TWN

出版型式：電子版,紙本