Perfluorinated superhydrophobic and oleophobic SiO2@PTFE nanofiber membrane with hierarchical nanostructures for oily fume purification

Zhu，Xiao1; Feng，Shasha1; Zhao，Shuaifei1,2; Zhang，Feng1; Xu，Chong1; Hu，Min1; Zhong，Zhaoxiang1; Xing，Weihong1

2020-01-15

10.1016/j.memsci.2019.117473

JOURNAL OF MEMBRANE SCIENCE   影响因子和分区

0376-7388

1873-3123

Polytetrafluoroethylene (PTFE) nanofiber membranes have been widely used in various air purification applications attributed to their excellent thermal and chemical stabilities. However, in oily fume purification, oil aerosols can easily permeate through the oleophilic membrane, which may lead to pore blocking, and increased filtration resistance and energy consumption, finally reducing the filtration efficiency and lifespan of the membrane. Herein, we report a hierarchical SiO@PTFE nanofiber membrane by coaxial electrospinning of SiO nanoparticle dispersion as the shell spinning solution and PTFE emulsion as the core spinning solution, followed by in-situ surface grafting of 1H,1H,2H,2H-perfluorooctyltrimethoxysilane. The prepared amphiphobic membrane has both superhydrophobicity and oleophobicity with the water and oil contact angles of 173° and 134°, respectively. It possesses uniform pore structures, high gas permeability (697 m m h kPa), excellent oily fume filtration efficiency (˃99%), as well as a low pressure drop (2.5 kPa) during 60-min filtration. Furthermore, our perfluorinated amphiphobic SiO@PTFE nanofiber membrane exhibits good reusable and stable properties. This work opens a versatile approach to design efficient functionalized membranes in the field of oily fume purification.

Amphiphobic membrane Coaxial electrospinning In-situ surface grafting Oily fume purification Polytetrafluoroethylene (PTFE)

SCI ; EI

英语

其他

Jiangsu Province Scientific Supporting Project[BK20170046]

Engineering ; Polymer Science

Engineering, Chemical ; Polymer Science

WOS:000495572700028

ELSEVIER

20193807461332

Air cleaners ; Electrospinning ; Emulsification ; Energy utilization ; Gas permeability ; Gas permeable membranes ; Grafting (chemical) ; Hydrophobicity ; Nanofibers ; Polytetrafluoroethylenes ; Pore structure ; Silica ; Silica nanoparticles ; SiO2 nanoparticles

Air Pollution Control:451.2 ; Energy Utilization:525.3 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Organic Polymers:815.1.1 ; Fiber Chemistry and Processing:819.3 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Solid State Physics:933

CHEMISTRY

2-s2.0-85072347803

Scopus

1.State Key Laboratory of Materials-Oriented Chemical EngineeringNational Engineering Research Center for Special Separation MembraneNanjing Tech University,Nanjing,210009,China
2.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution ControlSchool of Environmental Science and EngineeringSouthern University of Science and Technology,Shenzhen,518055,China

Zhu，Xiao,Feng，Shasha,Zhao，Shuaifei,et al. Perfluorinated superhydrophobic and oleophobic SiO2@PTFE nanofiber membrane with hierarchical nanostructures for oily fume purification[J]. JOURNAL OF MEMBRANE SCIENCE,2020,594.

Zhu，Xiao.,Feng，Shasha.,Zhao，Shuaifei.,Zhang，Feng.,Xu，Chong.,...&Xing，Weihong.(2020).Perfluorinated superhydrophobic and oleophobic SiO2@PTFE nanofiber membrane with hierarchical nanostructures for oily fume purification.JOURNAL OF MEMBRANE SCIENCE,594.

Zhu，Xiao,et al."Perfluorinated superhydrophobic and oleophobic SiO2@PTFE nanofiber membrane with hierarchical nanostructures for oily fume purification".JOURNAL OF MEMBRANE SCIENCE 594(2020).