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Ultraviolet crosslinking polyaryletherketone porous membrane, preparation method and application of ultraviolet crosslinking polyaryletherketone porous membrane

A polyaryl ether ketone and cross-linking technology, which is applied in electrical components, circuits, battery pack parts and other directions, can solve problems such as restricting application fields, achieve safety performance, improve high temperature resistance and thermal shrinkage resistance, hole The effect of uniform structure

Inactive Publication Date: 2016-05-18
吉林省聚科高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional polyaryletherketone (such as polyether ether ketone) is insoluble in most organic solvents, which limits its application fields

Method used

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  • Ultraviolet crosslinking polyaryletherketone porous membrane, preparation method and application of ultraviolet crosslinking polyaryletherketone porous membrane
  • Ultraviolet crosslinking polyaryletherketone porous membrane, preparation method and application of ultraviolet crosslinking polyaryletherketone porous membrane
  • Ultraviolet crosslinking polyaryletherketone porous membrane, preparation method and application of ultraviolet crosslinking polyaryletherketone porous membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A method for preparing a crosslinked polyaryletherketone porous membrane, comprising the following steps: soluble ultraviolet crosslinked polyaryletherketone (structural formula:

[0025] The molecular weight is 60,000, where m and n represent the percentage of each repeating segment, m=0.6, n=0.4) dissolved in N,N-dimethylacetamide at room temperature, magnetically stirred for 30 minutes, and prepared to have a mass fraction of 20 % polymer solution, adding polyvinylpyrrolidone (molecular weight: 40,000) and polyvinyl alcohol (molecular weight: 2000) with a mass ratio of 9:1, the mass dosage of the two and the soluble ultraviolet crosslinking polyaryletherketone polymer The quality and dosage are the same. After dissolving, filter through a filter membrane with a pore size of 0.3 to 0.5 μm to remove impurities, and stand for degassing for 30 mm before use.

[0026] Apply the polymer solution obtained in the previous step on a horizontal glass plate with a 20 μm spat...

Embodiment 2

[0029] As in Example 1, polyvinylpyrrolidone with a molecular weight of 60,000 and polyvinyl alcohol with a molecular weight of 8,000 were added at a mass ratio of 9:1, and the UV crosslinked polyaryletherketone porous membrane was prepared according to the same preparation process as in Example 1. Compared with the porous membrane prepared in Example 1, as the molecular weight of polyvinylpyrrolidone and polyvinyl alcohol increases, the dissolution rate in ethanol slows down, the pore size of the porous membrane decreases slightly, and the porosity is about 65%. The thermal dimensional stability of the membrane under high temperature conditions is similar to that of the porous membrane obtained in Example 1.

Embodiment 3

[0031]As in Example 1, prepare a soluble UV-crosslinkable polyaryletherketone polymer solution with a mass fraction of 25%, add polyvinylpyrrolidone and polyvinyl alcohol according to the same method as in Example 1, and prepare according to the same preparation process Ultraviolet cross-linked polyaryletherketone porous membrane. Compared with the porous membrane prepared in Example 1, as the concentration of the polymer solution increases, the porosity of the porous membrane decreases to about 60%; the thermal dimensional stability of the porous membrane under high temperature conditions is the same as that obtained in Example 1. Porous membranes are similar.

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Abstract

The invention provides an ultraviolet crosslinking polyaryletherketone porous membrane, a preparation method and an application of the ultraviolet crosslinking polyaryletherketone porous membrane in a lithium ion battery separator material and belongs to the technical field of polymer membrane materials. The membrane has the characteristics of high porosity, good infiltration performance, excellent heat resistance and the like. According to the technical scheme, the preparation method comprises steps as follows: firstly, a patented soluble ultraviolet crosslinking polyaryletherketone polymer (the patent No. 201510991547.7) with excellent comprehensive performance is adopted, and an ultraviolet crosslinking polyaryletherketone microporous membrane with high porosity is prepared with a phase separation method and an auxiliary phase reversal method; then, the electrolyte resistance, the stability of thermal dimension, the chemical stability and the mechanical performance of the microporous membrane are further improved with an ultraviolet crosslinking curing technique on the basis that the pore structure and the membrane thickness are maintained. The material has a great significance in improvement of the high safety of a lithium ion battery and has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of polymer membrane materials, and in particular relates to an ultraviolet cross-linked polyaryletherketone porous membrane, a preparation method and its application in lithium-ion battery diaphragm materials. Background technique [0002] The separator is one of the key inner components of the lithium-ion battery. The performance of the separator directly affects the capacity, cycle life and safety performance of the lithium battery. A separator with excellent performance plays an important role in improving the overall performance of the battery. The separator should have good chemical stability, thermal dimensional stability and thermochemical stability, ionic conductivity, electrolyte wettability, electronic insulation and certain mechanical strength. The current commercialized lithium battery separators are mainly polyethylene (PE), polypropylene (PP) microporous membranes and polypropylene / polyethylene...

Claims

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Application Information

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IPC IPC(8): C08J9/26C08J3/28C08J3/24C08L61/16H01M2/16H01M50/411
CPCC08J3/24C08J3/28C08J5/18C08J9/26C08L61/16C08J2361/16C08L2203/16C08L2201/08H01M50/411Y02E60/10
Inventor 白迪
Owner 吉林省聚科高新材料有限公司
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