writer：Ming Cao, Fan Xiao, Zijian Yang, Yingbo Chen*, Ligang Lin
keywords：Nanofiber membranePolytetrafluoroethyleneOil-water separationDemulsification
source：期刊
specific source：Separation and Purification Technology Volume 287, 15 April 2022, 120575
Issue time：2022年

Oily wastewater treatment is an arduous and urgent global problem. Electrospinning has wide applications in construction of high-efficiency oil-water separation membranes. Herein, electrospinning and electrospraying technology were combined to construct a Polytetrafluoroethylene (PTFE) nanofiber membrane (NFM) with multileveled structure for oily wastewater treatment. The separation performance (driven by gravity) of the NFM to oil-water mixture was studied. In addition, the demulsification performance of the NFM to water-in-oil surfactant-stabilized emulsions (W/O SSEs) under gravity and oil-in-water surfactant-stabilized emulsions (O/W SSEs) at 0.5 bar were studied subsequently. The results showed that the flux of the 9% D-H-PTFE to the oil-water mixture reached 4909 L m?2 h?1, with a separation rate of 99.99%; the flux to the CCl4 W/O SSE reached 1867.93 L m?2 h?1 with the separation rate of 98.46%. The flux to the CCl4 O/W SSE was 122 L m?2 h?1 and the separation rate was 98.40% in multiple cycles. Therefore, these NFMs are expected to be practically applied to a low-pressure driven membrane separation system for preliminary separation of different types of oily wastewater.