Janus membrane prepared via one step depositing coatings onto PVDF/PDMS membrane for simultaneous antiwetting and antifouling in DCMD
Janus membrane prepared via one step depositing coatings onto PVDF/PDMS membrane for simultaneous antiwetting and antifouling in DCMD
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Janus 膜是通过在 PVDF/PDMS 膜上一步沉积涂层而制备的，可在 DCMD 中同时防润湿和防污
DOI：
10.1016/j.desal.2022.115964
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发表时间：
2022-07-11
期刊：
影响因子：
9.9
通讯作者：
Wyman, Ian
中科院分区：
文献类型：
--
作者：
Ji, Hailan;Gu, Mengqi;Wyman, Ian
采用直接接触式膜蒸馏（DCMD）技术，制备了一种具有抗润湿性和抗渗透性的Janus膜。通过在PVDF/聚二甲基硅氧烷（PDMS）共混膜的一侧直接沉积没食子酸（GA）和聚乙烯亚胺（PEI）来制备膜。不同表征方法的结果表明Janus膜的成功制造。由于Janus膜的非对称润湿性，使其具有良好的抗润湿性和抗渗透性。当使用Janus膜处理含有1000 mg/L原油、0.3 mM SDS和3.5wt%NaCl的料液进行36 h DCMD测试时，保持了相对稳定的通量15.7 +/- 0.2 Kg.m（-2）.h（-1），并且渗透侧保持了0.3 +/- 0.0 μ S/cm的非常小的电导率。此外，所制备的Janus膜在pH 1.0 ~ 11.0范围内保持稳定。因此，这种Janus膜可以作为DCMD工艺处理复杂污染物废水的一个强有力的候选者。
A Janus membrane with antiwetting and antifouling properties was prepared for complicated wastewater treatment via direct contact membrane distillation (DCMD) technology. The membrane was fabricated by directly depositing gallic acid (GA) and polyethyleneimine (PEI) onto one side of the PVDF/polydimethylsiloxane (PDMS) blend membrane. The results from different characterization methods demonstrate the successful fabrication of the Janus membrane. The obtained Janus membrane performs excellent antiwetting and antifouling properties because of its asymmetric wettability. When the 36 h DCMD test was carried out using the Janus membrane to treat feed solution containing 1000 mg/L crude oil, 0.3 mM SDS and 3.5 wt% NaCl, a relatively stable flux of 15.7 +/- 0.2 Kg.m(-2).h(-1) was maintained, as well as the very small conductivity of 0.3 +/- 0.0 mu S/cm in the permeate side was kept. In addition, the as-prepared Janus membrane maintained stable when pH ranged from 1.0 to 11.0. Therefore, this Janus membrane can be a strong candidate in DCMD process to treat wastewater containing complicated contaminants.