Long-acting filtering membrane with biological electrets uniformly distributed on polylactic acid nanofiber surface and preparation method thereof

• Main Authors: ZHU JINTUO, ZHOU FUBAO, HE XINJIAN, XU HUAN, LI XINYU
• Format: Patent
• Language: Chinese; English
• Published: 14.10.2022
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention discloses a long-acting filtering membrane with biological electrets uniformly distributed on the surface of polylactic acid nanofibers and a preparation method thereof, and relates to a technical scheme of efficiently synthesizing a biological electret material and uniformly distributing the biological electret material on the surface of the polylactic acid nanofibers so as to comprehensively improve the mechanical property, the surface potential and the air filtering efficiency. The biological electret material is a hydroxyapatite nano-whisker synthesized by microwave-assisted biomimetic mineralization, surface activation and high dispersibility are obtained through plasma treatment, and then the hydroxyapatite nano-whisker is atomized and deposited on the surface of a polylactic acid nanofiber subjected to synchronous electrostatic spinning. Finally, the fully-degradable nanofiber membrane with high surface potential, high mechanical property, high filtering efficiency and long-acting filteri