POLY(4-METHYL-1-PENTENE) HOLLOW FIBER MEMBRANE HAVING GRADED PORE STRUCTURE, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

WIPO Patent Application WO/2022/083067

A1

The present disclosure provides a method for preparing a poly(4-methyl-1-pentene) hollow fiber membrane having a graded pore structure by combining thermally-induced phase separation and nonsolvent induced phase separation, comprising: poly(4-methyl-1-pentene) is first homogenized with a diluent under high temperature; the mixture is molded in one step by means of extrusion, passes through an air section, is cooled in a cooling bath, and undergoes thermally-induced phase separation and nonsolvent induced phase separation; and finally, the diluent is extracted, and the hollow fiber membrane is obtained. The hollow fiber membrane prepared using the method provided in the present disclosure has enhanced safety. The thermally-induced phase separation and the nonsolvent induced phase separation processes in the poly(4-methyl-1-pentene)-diluent system are easy to adjust, thereby obtaining a poly(4-methyl-1-pentene) membrane having better mechanical strength, gas permeability and plasma immersion resistance. The present disclosure also provides a poly(4-methyl-1-pentene) hollow fiber membrane and a use thereof in the field of artificial membrane lungs.

LIN YAKAI (CN)
WANG LIN (CN)
WANG XIAOLIN (CN)

PCT/CN2021/083475

April 28, 2022

March 29, 2021

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UNIV TSINGHUA (CN)

B01D71/26; B01D67/00; B01D69/08

CN112403289A	2021-02-26
CN104707490A	2015-06-17
US10926214B2	2021-02-23
CN107596925A	2018-01-19
CN101623600A	2010-01-13
US20030064003A1	2003-04-03

LEADER PATENT & TRADEMARK FIRM (CN)

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