writer：Liu, Huan Huang, Qinglin Wang, Yafeng Xiao, Changfa
keywords：PTFE conductive membrane EVMD Membrane fouling Electrochemical cleaning Electro-catalytic
source：期刊
specific source：Separation and Purification Technology
Issue time：2017年

To inhibit membrane fouling and to overcome the disadvantages of traditional conductive membranes,

polytetrafluoroethylene (PTFE) flat sheet membrane was used as the substrate to prepare a flexible conductive

membrane. Multi-walled carbon nanotubes (MWCNTs) and mixture of MWCNTs/graphene (mass

ratio 1:1) were employed as conductive layer. PTFE conductive membrane acted as a cathode which was

applied in EVMD (Electric vacuum membrane distillation) process to mitigate membrane fouling. The MD

flux increased from 4.97 to 8.89 L/m2 h which was because of not only electric field repulsion but also the

effect of electro-catalysis. MD flux recovered from 8.51 to 11.68 L/m2 h after electrochemical cleaning

(EC) for 4 h fixing electric field strength at 1.5 v/cm. Meanwhile PTFE conductive membrane was

employed in electro-catalytic degradation experiment, in which nano-TiO2 was used as the electrocatalyst.

In the electro-catalytic degradation experiment, the degradation rate of rhodamine red dye

was up to 99.25%, and composite membranes exhibited good electro-catalytic stability.