Preparation of Janus Hollow Fiber Membrane via One-Step Strategy and Study on Its Membrane Distillation Performance |
Authors: LI Ming,SUN Yang,WANG Cong,KANG Guodong,FU Xiaoyan,YU Haijun,CAO Yiming, Jin Yan |
Units: 1. Dalian Institute of Chemical Physics (DICP),Chinese Academy of Sciences (CAS),Dalian 116023,China;2. University of Chinese Academy of Sciences,Beijing 100049,China;3. Dalian Ecological Environment Monitoring Center of Liaoning Province,Dalian 116023,China; Wharton Technology Co., LTD,Guiyang 550014, China |
KeyWords: Janus hollow fiber membrane;Direct contact membrane distillation;Phase inversion regulation;Surface segregation |
ClassificationCode:TQ028.8 |
year,volume(issue):pagination: 2022,42(3):32-40 |
Abstract: |
The hydrophilic material is blended with polyvinylidene fluoride to prepare the membrane casting solution. By regulating the phase inversion process, promoting the segregation of hydrophilic polymer to the inner surface, changing the structure of both sides of the hollow fiber membrane, the Janus hollow fiber membrane with asymmetric wettability was prepared, and the influence of the concentration of hydrophilic material added in the membrane casting solution was explored. The prepared Janus hollow fiber membrane has an outer side water contact angle of more than 135°, and an inner side water contact angle of about 55°. When the temperature of feed water is 60°C and the permeate water is 10°C, the permeation flux of the direct contact membrane distillation (DCMD) process is about 35 kg/(m2·h), and the salt rejection rate is 99.9%. In the 200-min continuous DCMD experiment, the salt rejection rate of Janus hollow fiber membranes always remained above 98%. |
Funds: |
国家自然科学基金面上项目(22178334);中国科学院洁净能源创新研究院合作基金(DNL201909);辽宁省自然科学基金(2019-MS-313);大连市科技创新基金应用基础研究项目(2019J12SN67) |
AuthorIntro: |
李明(1997-),男,山西晋城人,硕士研究生,从事Janus膜制备和应用的研究,E-mail:liming@dicp.ac.cn |
Reference: |
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