Preparation of bi-continuous Nylon-66 porous membranes by coagulation of incipient dopes in soft non-solvent baths
學年 101
學期 2
出版（發表）日期 2013-03-15
作品名稱 Preparation of bi-continuous Nylon-66 porous membranes by coagulation of incipient dopes in soft non-solvent baths
作品名稱（其他語言）
著者 Chang, Hsu-Hsien; Chen, Sheng-Chang; Lin, Dar-Jong; 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 Desalination 313, pp.77-86
摘要 Microporous Nylon-66 membranes were prepared by non-solvent induced phase separation (NIPS) from the Water/1-Butanol/Formic acid/Nylon66 quaternary system. Water, as a strong non-solvent for Nylon-66, was employed to enhance polymer crystal nucleation in the casting dope, while 1-butanol was adopted as a soft coagulant whereby liquid–liquid demixing mechanism can be sufficiently suppressed. By gradually increasing the water content in the dope, the effect of nucleation density on the morphology of the membrane was clearly manifested. While low water content (< 2.5%) dopes resulted in membranes consisting of large full spherulites, high water content (> 7.5%) dopes gave rise to symmetric bi-continuous membranes composed of small interlocked, stick-like crystallites intertwining with continuous channels of micropores. Water permeation flux and tensile strength of the membranes were measured and correlated with the porosity, pore size, and membrane morphology. In addition, X-ray diffraction (XRD) and Fourier Transform Infrared-Attenuated total reflection (FTIR-ATR) analyses indicate that the membranes contained α-type crystals with a crystallinity of ~ 38%, consistent with that determined from Differential Scanning Calorimetry (DSC). The later method also showed that all membranes have a similar crystal melting behavior with Tm ~ 265 °C.
關鍵字 Nylon-66;Polymeric membrane;Immersion precipitation;Nucleation agent;Crystallization
語言 en
ISSN 1873-4464
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Chenga, Liao-Ping
審稿制度 是
國別 NLD
公開徵稿
出版型式 電子版
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