Title:
POLYLACTIC ACID NANO DOUBLE-LAYER FIBER MEMBRANE FILTER ELEMENT AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/024497
Kind Code:
A1
Abstract:
A polylactic acid (PLA) nano double-layer fiber membrane filter element and a preparation method therefor. The preparation method comprises: first preparing a PLA melt electrospinning nanofiber membrane (MME); then arranging a TPU nanoparticle binder on a surface of the MME; then preparing a PLA solution electrospinning fiber membrane (MSE) by using the MME as a receiving base material and using the surface in which the binder is located as a receiving surface; and finally, carrying out low-pressure thermal bonding by using a thermal treatment means to obtain a filter element. In the obtained filter element, the ratio of the diameter median of the MME fiber to the diameter median of the MSE fiber is 1.2-3; the gram weight of the MSE is 0.1-0.2 g/m2, and the gram weight of the MME is 10-30 g/m2; and the filtering efficiency of the filter element on particles of 0.3 μm is 93-99%, air suction resistance is ≤200 Pa, and the filtering efficiency is attenuated to within 7% after ten instances of sterilization. The obtained filter element is degradable and reusable.
Inventors:
ZHANG LIN (CN)
ZHAO RUN (CN)
XU JINLONG (CN)
WANG LIXIA (CN)
ZHAO RUN (CN)
XU JINLONG (CN)
WANG LIXIA (CN)
Application Number:
PCT/CN2022/081846
Publication Date:
March 02, 2023
Filing Date:
March 19, 2022
Export Citation:
Assignee:
JIANGSU NEW HORIZON ADVANCED FUNCTIONAL FIBER INNOVATION CENTER CO LTD (CN)
International Classes:
B01D39/16; B01D69/12
Foreign References:
| CN113413684A | 2021-09-21 | |||
| CN105951308A | 2016-09-21 | |||
| CN103191604A | 2013-07-10 | |||
| CN101829454A | 2010-09-15 | |||
| CN113181781A | 2021-07-30 |
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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