Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/216936
Title: TACKLING WETTING, SCALING, AND FOULING IN MEMBRANE DISTILLATION: ADVANCED MEMBRANES PROVIDE A SOLUTION
Authors: CHEN, YUANMIAOLIANG
Keywords: Saline wastewater, Desalination, Membrane distillation, Wetting, Scaling, Fouling
Issue Date: 17-Dec-2021
Citation: CHEN, YUANMIAOLIANG (2021-12-17). TACKLING WETTING, SCALING, AND FOULING IN MEMBRANE DISTILLATION: ADVANCED MEMBRANES PROVIDE A SOLUTION. ScholarBank@NUS Repository.
Abstract: Membrane distillation (MD) is an emerging membrane-based desalination process that is able to treat hypersaline wastewaters using low-grade thermal energy. However, its practical implementation has some challenges including pore wetting, mineral scaling, and membrane fouling. This dissertation devotes to developing novel MD membranes to overcome these challenges. First, we fabricated an omniphobic and slippery MD membrane to enhance the resistance to wetting and scaling. Then, inspired by the size exclusion mechanism from nanofiltration (NF), we developed a novel wetting mitigation strategy by constructing a nanoporous layer on conventional MD membranes. Further, we demonstrated that a Janus MD membrane with a highly hydrophilic nanoporous layer and a hydrophobic microporous substrate is able to simultaneously resist wetting and fouling. Last, based on the above findings, we fabricated a Janus tri-bore hollow fiber membrane with both excellent wetting and fouling resistance. These works pave the way for the practical applications of MD.
URI: https://scholarbank.nus.edu.sg/handle/10635/216936
Appears in Collections:Ph.D Theses (Open)

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