期刊
JOURNAL OF MEMBRANE SCIENCE
卷 648, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2022.120353
关键词
Ultra-high molecular weight polyethylene; Superhydrophobic property; Membrane distillation; Thermally induced phase separation
资金
- Shanghai International S&T Coopera-tion Fund [16160731302]
- Natural Science Foundation of China [51473031]
Superhydrophobic ultra-high molecular weight polyethylene (UHMWPE) composite membranes were prepared by vacuum filter UHMWPE microgels onto a commercial non-woven, showing high water recovery and separation efficiency.
A superhydrophobic membrane could effectively prevent the feed solution from wetting the membrane surface in membrane distillation (MD). The majority of reported superhydrophobic membranes utilized in MD were modified by hydrophobic agents (e.g. fluorosilicone), which pose potential risks to potable water production if they leach or lose coating materials. Here, intrinsic superhydrophobic ultra-high molecular weight polyethylene (UHMWPE) composite membranes were prepared by vacuum filter UHMWPE microgels onto a cheap commercial non-woven, and UHMWPE microgels were prepared by thermally induced phase separation. The prepared membranes have a particle-like structure, which makes the membrane have a high water contact angle (154.6 & DEG;) and low sliding angle (2.5 & DEG;). In addition, the membranes have a high water recovery of 93.6%, while the conductivity was just increased from 2.3 to 5.7 mu S/cm in 83.0 h. Moreover, the membranes also have a high separation efficiency (99.9%) for treating anionic dyeing wastewater in the long-term experiment (50 h).
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