Tsinghua University Shenzhen International Graduate School and School of materials jointly develop nanofiber filter membrane materials for reusable masks

At present, novel coronavirus pneumonia is being fought all over the country, and respirators are the most important protective products All kinds of medical masks used by ordinary people and medical staff daily use charged PP melt blown filter fiber as an effective filter layer After cooking and disinfection, the elimination of static electricity leads to the deterioration of the protective effect and can not be reused At this critical moment, the requirements for high-performance masks are highlighted In recent years, Li Bo's research team of Shenzhen International Graduate School of Tsinghua University and Wu Hui's Associate Professor team of Tsinghua University School of materials have been cooperating in the development of nanofiber materials, and found that nanofiber membranes have good filtration performance In the fight against the epidemic, the team launched the second development of nanofiber membrane for the material of the middle filter layer of respirator The micro appearance of nanofiber filter material developed by the team (source: Tsinghua News Network) through experiments, the team found that based on the ultra-fine diameter and high fiber density of air spinning nanofiber, non-static physical filtration can be realized, with high filtration efficiency and low air resistance, meeting the technical requirements of medical masks At the same time, after repeated steam disinfection, it can still maintain high filtration efficiency and low air resistance, which can meet the needs of the public in the case of mask shortage At present, the relevant materials have accelerated the third-party testing work, and strive to provide materials and products required by the market as soon as possible.