4.7 Article

Fluorocarbon-Based Selective-Superwetting Nanofibrous Membranes with Ultraviolet-Driven Switchable Wettability for Oil-Water Separation

期刊

ACS APPLIED NANO MATERIALS
卷 5, 期 9, 页码 13018-13026

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c02809

关键词

superhydrophobic; switchable wettability; oil-water separation; ultraviolet-driven; electrospinning

资金

  1. National Natural Science Foundation of China [52105571, 51975163, 51975145, 52005137]
  2. China Postdoctoral Science Foundation [2021TQ0087]
  3. Heilongjiang Postdoctoral Science Foundation [LBH-Z21054]
  4. Heilongjiang Natural Science Foundation [LH2021E056]

向作者/读者索取更多资源

An ultraviolet-driven selective-superwetting nanofibrous membrane was prepared by electrospinning, which shows great potential in the field of oil-water separation. The wetting behavior of the membrane can be tuned by UV irradiation and heating, demonstrating reliable controllability.
Selective-superwetting membranes possess control-lable wettability and have great potential in the oil-water (OW) separation field. The electrospinning technique has advantages in fabricating nanofibrous materials with distinguishing features such as high porosity and large surface area. However, in recent years, there have been a few studies on preparing photoinduced superwetting membranes by electrospinning. In this study, an ultraviolet-driven selective-superwetting nanofibrous membrane was prepared by electrospinning poly(vinylidene fluoride)-cohexa-fluoropropylene (PVDF-HFP) blended with fluorinated TiO2 nanoparticles. The wetting behavior of the membrane can be tuned between superhydrophobic/superoleophilic and super-hydrophilic/underwater superoleophobic by two processes, ultra-violet (UV) irradiation, and heating, during which the water contact angle (WCA) fluctuates rapidly from 170 to 0 degrees and back to 160 degrees. The reliability of the controllable wettability was proven by a 15-cycle conversion test, and the nanofibrous membrane remained superhydrophobic thereafter. Our results have promising multipurpose applications as an effective and flexible solution to more complex oil-water mixtures in wastewater abatement.

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