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Xuewu Huang,Bei Li,Xin Song,Ling Wang,Yue Shi,Mingjun Hu,Jiefeng Gao,Huaiguo Xue 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.70 No.-
Aflexible, stretchable and electrically conductive nanofiber composite with superhydrophobicity wasfabricated by ultrasonication induced carbon nanotubes (CNTs) decoration onto the polymer nanofiber,followed by methyltrichlorosilane (MTS) modification. The introduction of CNTs and polysiloxanederived from MTS improved the superhydrophobicity, conductivity, thermal stability and mechanicalproperties of the nanofibrous membrane. The superhydrophobicity and electrical conductivity could bemaintained during the cyclic stretching. The nanofiber composite membrane could be utilized toseparate the oil from the oil/water mixture regardless of pH of water, exhibiting a largeflux, highefficiency and good recyclability.
Jiefeng Gao,Bei Li,Ling Wang,Xuewu Huang,Huaiguo Xue 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.68 No.-
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 SiO2/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 SiO2 and PVDF reached a critical value, the SiO2 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.