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author:

Lin, Jiuyang (Lin, Jiuyang.) [1] | Lin, Fang (Lin, Fang.) [2] | Liu, Riri (Liu, Riri.) [3] | Li, Ping (Li, Ping.) [4] | Fang, Shengqiong (Fang, Shengqiong.) [5] | Ye, Wenyuan (Ye, Wenyuan.) [6] | Zhao, Shuaifei (Zhao, Shuaifei.) [7]

Indexed by:

EI

Abstract:

Hydrophobic anti-wetting membranes have many applications, such as oily wastewater treatment via oil/water separation, desalination via membrane distillation, and carbon capture via gas-liquid membrane contactors. Herein, we used a simple and scalable method to fabricate robust superhydrophobic polyvinylidene fluoride (PVDF) based membranes by one-step spray-coating of fluorinated SiO2 nanoparticles. The prepared PVDF membrane was systematically characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and contact angle measurements. The modified PVDF membrane had excellent superhydrophobicity with an extremely high water contact angle up to 171.8 ± 1.1° and a low sliding angle of 1.69 ± 0.13°, due to the fluorinated close-packed hydrophobic SiO2 nanoparticles on the surface. The modified PVDF membrane maintained its relatively stable superhydrophobicity under various harsh conditions, i.e., exposure in hot water, NaOH and HCl, ultrasonication and high-speed flushing, indicating the superior robustness and stability. The prepared membrane also exhibited consistent separation efficiencies up to 99.88 ± 0.03% in water-in-oil emulsions, and superior recyclability and durability over 40 cycles. In addition, spray-coating showed its great promise in engineering various superhydrophobic surfaces on different substrates and excellent scalability in fabricating large-size membranes. This study demonstrates a facilely scalable spray-coating method for engineering robust superhydrophobic surfaces and membranes that can be potentially used for various gas, vapor and water/oil separations. © 2019 Elsevier B.V.

Keyword:

Chlorine compounds Coatings Contact angle Desalination Distillation Emulsification Emulsions Fabrication Fluorine compounds Fourier transform infrared spectroscopy Gas permeable membranes Gravitation Nanoparticles Scalability Scanning electron microscopy Silica Silica nanoparticles Silicon SiO2 nanoparticles Sodium hydroxide Superhydrophobicity Surface properties Wastewater treatment Wetting X ray photoelectron spectroscopy

Community:

  • [ 1 ] [Lin, Jiuyang]School of Environment and Resources, Fuzhou University, Fuzhou; 350116, China
  • [ 2 ] [Lin, Fang]School of Environment and Resources, Fuzhou University, Fuzhou; 350116, China
  • [ 3 ] [Liu, Riri]School of Environment and Resources, Fuzhou University, Fuzhou; 350116, China
  • [ 4 ] [Li, Ping]School of Environment and Resources, Fuzhou University, Fuzhou; 350116, China
  • [ 5 ] [Fang, Shengqiong]School of Environment and Resources, Fuzhou University, Fuzhou; 350116, China
  • [ 6 ] [Ye, Wenyuan]Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou; 350002, China
  • [ 7 ] [Zhao, Shuaifei]State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen; 518055, China
  • [ 8 ] [Zhao, Shuaifei]College of Environmental Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian; 116026, China

Reprint 's Address:

  • [fang, shengqiong]school of environment and resources, fuzhou university, fuzhou; 350116, china

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Source :

Separation and Purification Technology

ISSN: 1383-5866

Year: 2020

Volume: 231

7 . 3 1 2

JCR@2020

8 . 2 0 0

JCR@2023

ESI HC Threshold:160

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 90

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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