Journal of Industrial and Engineering Chemistry

  • Volume 68
  • /
  • Pages.416-424
  • /
  • 2018
  • /
  • 1226-086X(pISSN)
  • /
  • 1876-794X(eISSN)
The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Flexible membranes with a hierarchical nanofiber/microsphere structure for oil adsorption and oil/water separation

  • Gao, Jiefeng (School of Chemistry and Chemical Engineering, Yangzhou University) ;
  • Li, Bei (School of Chemistry and Chemical Engineering, Yangzhou University) ;
  • Wang, Ling (School of Chemistry and Chemical Engineering, Yangzhou University) ;
  • Huang, Xuewu (School of Chemistry and Chemical Engineering, Yangzhou University) ;
  • Xue, Huaiguo (School of Chemistry and Chemical Engineering, Yangzhou University)
  • Received : 2018.04.26
  • Accepted : 2018.09.01
  • Published : 2018.12.25
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Abstract

Oil spill and oily wastewater have now become a serious threat to the freshwater and marine environments. Porous materials with super-hydrophobicity and super-oleophilicity are good candidates for the oil adsorption and oil/water separation. Here, flexible hybrid nanofibrous membrane (FHNM) containing $SiO_2$/polyvinylidene fluoride (PVDF) microspheres was prepared by simultaneous electrospinning and electrospraying. The obtained FHNM combined the flexibility of the nanofiber mat and super-hydrophobicity of the microspheres, which could not be achieved by either only electrospinning or only electrospraying. It was found that when the weight ratio between the $SiO_2$ and PVDF reached a critical value, the $SiO_2$ nanoparticles were present on the PVDF microsphere surface, significantly improving the surface roughness and hence the contact angle of the FHNM. Compared with the pure electrospun PVDF nanofiber mat, most of the FHNMs have a higher oil adsorption capacity. The FHNM could separate the oil with water quickly under the gravity and displayed a high efficiency and good reusability for the oil/water separation. More importantly, the FHNM could not only separate the oil with the pure water but also the corrosive solution including the salt, acid and alkali solution.

Keywords

Acknowledgement

Supported by : Natural Science Foundation of China

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