膜蒸馏
膜
润湿
微型多孔材料
化学工程
材料科学
接触角
聚四氟乙烯
涂层
聚合物
高分子化学
纳米技术
化学
复合材料
海水淡化
工程类
生物化学
作者
Shihong Lin,Siamak Nejati,Chanhee Boo,Yunxia Hu,Chinedum O. Osuji,Menachem Elimelech
出处
期刊:Environmental Science and Technology Letters
[American Chemical Society]
日期:2014-10-02
卷期号:1 (11): 443-447
被引量:292
摘要
In this work, we fabricate an omniphobic microporous membrane for membrane distillation (MD) by modifying a hydrophilic glass fiber membrane with silica nanoparticles followed by surface fluorination and polymer coating. The modified glass fiber membrane exhibits an anti-wetting property not only against water but also against low surface tension organic solvents that easily wet a hydrophobic polytetrafluoroethylene (PTFE) membrane that is commonly used in MD applications. By comparing the performance of the PTFE and omniphobic membranes in direct contact MD experiments in the presence of a surfactant (sodium dodecyl sulfate, SDS), we show that SDS wets the hydrophobic PTFE membrane but not the omniphobic membrane. Our results suggest that omniphobic membranes are critical for MD applications with feed waters containing surface active species, such as oil and gas produced water, to prevent membrane pore wetting.
科研通智能强力驱动
Strongly Powered by AbleSci AI