Study on the fabrication and properties of FEP/SiO2hybrid flat-sheet membrane and its application in VMD
writer：Chen Kaikai; Xiao Changfa; Huang Qinglin*; Zhang Chaoxin; Wu Yanjie; Liu Hailiang; Liu Zhen
keywords：Poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP); Hybrid; Flat-sheet membranes; SiO2; Properties
source：期刊
specific source：Desalination and Water Treatment
Issue time：2015年
Due to the chemical structure of the perfluoro group, perfluoro-polymers, such as
polytetrafluoroethylene and poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP)
deserves excellent properties of outstanding thermal and chemical resistance and strong
hydrophobicity. In this study, FEP hybrid flat-sheet membranes were fabricated by the
melt-compressed membrane formation system, which composed of FEP, micro-scale SiO2,
and Dioctyl-Phthalate (DOP). Effects of DOP and SiO2 contents on the membrane morphologies and properties were investigated, respectively. The membranes’ corresponding microfiltration performances were characterized in terms of pure water flux, mechanical strength, membrane porosity, and vacuum membrane distillation (VMD). Results illustrated that the obtained FEP flat-sheet membranes displayed a typical asymmetric structure. There were obvious enhancement of membrane’s pure water flux and porosity with increasing DOP
and SiO2 contents. The salt rejections achieved as high as 99.9% by VMD process.