公开(公告)号：US20240342661A1

公开(公告)日：2024-10-17

申请号：US18754201

申请日：2024-06-26

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Rongrong CAI ,  Jiusi WANG ,  Lizhi ZHANG

IPC: B01D69/08 ,  B01D46/00 ,  B01D46/54 ,  B01D46/66 ,  B01D53/22 ,  B01D65/02 ,  B01D67/00 ,  B01D71/36 ,  B01D71/80

CPC classification number: B01D69/087 ,  B01D46/0032 ,  B01D46/543 ,  B01D46/785 ,  B01D53/228 ,  B01D65/02 ,  B01D67/0083 ,  B01D67/0095 ,  B01D69/081 ,  B01D71/36 ,  B01D71/80 ,  B01D2321/22 ,  B01D2323/081 ,  B01D2323/12 ,  B01D2323/35 ,  B01D2323/39

Abstract: Provided are a recyclable electret filtering membrane, a preparation method therefor and a cleaning and charge regeneration method therefor. The preparation method includes: dissolving fluorine-containing polymer particles and polyoxyethylene particles in deionized water to prepare a spinning solution, and then performing electrostatic spinning, calcining, cooling, drying and corona charging to obtain the recyclable electret filtering membrane. A surface of the filtering membrane is subjected to water drop rolling cleaning and friction electrification after dust holding, and then dried to realize charge regeneration and reuse. The filtering membrane obtained in the present invention has an initial surface potential of (−600)-(−950) V, the potential can be regenerated to (−700)-(−1000) V by water drop rolling and electrification after dust holding, the charge recovery rate is 90%-125%, the dust removal rate is 90%-100%, and the filtering efficiency for PM2.5 is equal to or greater than 94%.