膜
蒸馏水
化学工程
材料科学
膜蒸馏
聚合物
接触角
聚乙二醇
渗透
聚乙烯吡咯烷酮
溶剂
水溶液
极限抗拉强度
高分子化学
色谱法
化学
有机化学
复合材料
海水淡化
工程类
生物化学
作者
Malihe Sabzekar,Mahdi Pourafshari Chenar,Zahra Maghsoud,O. Mostaghisi,M.C. García-Payo,M. Khayet
标识
DOI:10.1016/j.memsci.2020.118845
摘要
A first attempt was made to prepare cyclic olefin polymer/copolymer (COP/COC) flat-sheet porous membranes by the well-known non-solvent induced phase separation method. In this study, two solvents (chloroform and 1,2,4-trichlorobenzene), different additives (polyvinylpyrrolidone, PVP, polyethylene glycol, PEG400, polyethylene oxide, PEO, and Sorbitan monooleate, Span 80) and coagulants (acetone and 70/30 wt% acetone/water mixture) were employed. The prepared membranes were characterized in terms of the thickness (70–85 μm), porosity (~50–80%), liquid entry pressure (1.16–4.55 bar), water contact angle (~86° - 111°), mean pore size (158–265 nm), mechanical properties (tensile strength: 0.74–5.51 MPa, elongation at break: 3.34%–7.94% and Young's modulus: 29–237 MPa), morphological and topographical characteristics. Short-term direct contact membrane distillation (DCMD) tests showed maximum permeate fluxes of 20 kg m−2h−1 and 15 kg m−2h−1 when using as feed distilled water and 30 g/L sodium chloride aqueous solution, respectively, with a high salt separation factor (99.99%). Long-term DCMD tests of some selected membranes carried out during 24–50 h showed that the membranes prepared with PEG additive exhibited more stable DCMD performance. In general, it was proved that COP can be successfully used as a novel polymer candidate in membrane distillation (MD) applications.
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