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:Formation of bi-continuous hydrophobic Nylon-12 membranes via cold solvent induced phase separation (CIPS) for membrane distillation application
學年107
學期2
出版(發表)日期2019/02/05
作品名稱Formation of bi-continuous hydrophobic Nylon-12 membranes via cold solvent induced phase separation (CIPS) for membrane distillation application
作品名稱(其他語言)
著者Chih-Hao Tsai; Konstantinos Beltsios; Liao-Ping Cheng
單位
出版者
著錄名稱、卷期、頁數Journal of Applied Polymer Science 136(5), p.47036
摘要Skinless nylon 12 microporous membranes were prepared via a cold‐solvent‐induced phase‐separation process from a binary nylon 12–formic acid system. Through the incorporation of an aging step, polymer nucleation in the dope was enhanced, and the formed membranes exhibited a special particulate structure composed of interlocked sticklike or sheaflike crystallites, which coexisted with continuous microporosity. The crystallite size was affected by the polymer concentration in the dope and the aging time; for example, aging alone allowed for the reduction of the particle diameter from about 20 μm to about 1 μm. Because the membranes were skinless and hydrophobic (contact angles ≈ 105°), they were potentially appropriate for desalination via membrane distillation (MDi). For the case of desalting 3.5% NaCl(aq) by means of direct‐contact MDi, very high rejection ratios (∼99.6%) were achieved for all membranes under the operation conditions (temperature of the hot stream = 50°C, temperature of the cold stream = 20°C, and circulation rate = 0.7 L/min), whereas the highest permeation flux obtainable was 5.15 L/m2 h. The membranes were strong, with tensile strengths ranging from 4.7 to 6.3 N/mm2. Finally, we discovered a shift from α to γ structure as the dope polymer increased, whereas the crystallinity was about 27% in all cases.
關鍵字membranes;morphology;polyamides;porous materials;separation techniques
語言英文
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者Liao-Ping Cheng
審稿制度
國別美國
公開徵稿
出版型式,電子版
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