Lotus leaf-like SiO2 nanofiber coating on polyvinylidene fluoride nanofiber membrane for water-in-oil emulsion separation and antifouling enhancement

被引：51

作者：

Liang, Yejin ^{[1
]}

Yang, Eunmok ^{[1
]}

Kim, Minbeom ^{[1
]}

Kim, Soyoung ^{[2
]}

Kim, Hyeonseo ^{[1
]}

Byun, Jaehyun ^{[1
]}

Yanar, Numan ^{[1
]}

Choi, Heechul ^{[1
]}

机构：

[1] Gwangju Inst Sci & Technol, Sch Earth Sci & Environm Engn, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

[2] Univ Michigan, Dept Chem, 930 North Univ Ave, Ann Arbor, MI 48109 USA

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 452卷

基金：

新加坡国家研究基金会;

关键词：

Nanofiber-based coating; Sprayable; Superhydrophobic; Oil; Water separation; Antifouling; OIL/WATER SEPARATION; TRANSPARENT; SURFACES; DESIGN; PERFORMANCE; ROBUST;

D O I：

10.1016/j.cej.2022.139710

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Separation of water-in-oil emulsions is necessary to recycle valuable resources in practical industries, as well as to protect the natural environment from damage. However, the formation of a filter cake layer by tiny water droplets, which commonly sticks to the membrane surface and is difficult to remove, limits the efficiency of the separation process. Therefore, an enhancement in the antifouling property is required to relieve the impact of the high cost and energy consumption caused by fouling. The construction of a hierarchical surface is a promising strategy, but extant coating methods have shortcomings that inhibit their widespread application and scalability. We report a sprayable premodified SiO2 nanofiber coating, which has a lotus leaf-like hierarchical surface, interconnected porous network, and superwetting properties, on a polyvinylidene fluoride nanofiber membrane to mitigate the fouling. The resultant membrane with the biomimetic coating exhibited a completely recovered flux in the recycling test while the pristine membrane exhibited an irreversible flux. Owing to this favorable reusability, this biomimetic coating membrane is a promising platform for an industrial water-in-oil emulsion separation.

引用

页数：10

共 59 条

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