Ultra-high molecular polyethylene/poly (4-methyl-1-amylene) blended microporous membrane prepared with thermally induced phase separation method and preparation method thereof

A heat-induced phase separation method and ultra-high molecular technology, which is applied in the field of ultra-high molecular polyethylene/poly blend microporous membrane and its preparation, can solve the problem that the heat resistance, liquid absorption and safety of traditional diaphragms cannot meet the requirements And other problems, to achieve the effect of high heat resistance, high melting temperature, high tensile modulus

Inactive Publication Date: 2017-09-26
HEFEI XINGYUAN NEW ENERGY MATERIAL CO LTD
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the requirements for lithium-ion batteries in terms of voltage, power, electricity and safety are getting higher and hi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultra-high molecular polyethylene/poly (4-methyl-1-amylene) blended microporous membrane prepared with thermally induced phase separation method and preparation method thereof
  • Ultra-high molecular polyethylene/poly (4-methyl-1-amylene) blended microporous membrane prepared with thermally induced phase separation method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to 5 parts of TPX (commercially available, MX002) and 1 part of antioxidant (β-(3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate), 0.05 part of auxiliary antioxidant ( Pentaerythritol distearyl diphosphite) blend. Put the above mixed TPX and UHMWPE powder into the extruder at a ratio of 5:100, plasticize with paraffin oil, and blend evenly.

[0022] The melt formed by the twin-screw extruder passes through the die head and the quenching roll to form an oil film, and the oil film is subjected to biaxial stretching, extraction, and heat setting to obtain ultra-high molecular weight polyethylene / poly(4-methyl-1-pentene) The microporous membrane of the present invention can be obtained by blending the microporous membrane. The performance test results are shown in Table 1.

Embodiment 2

[0026] According to 5 parts of TPX (commercially available, MX002) and 1 part of antioxidant (β-(3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate), 0.05 part of auxiliary antioxidant ( Pentaerythritol distearyl diphosphite) blend. Add the above mixed TPX and UHMWPE powder into the extruder at a ratio of 10:100, plasticize with paraffin oil, and blend evenly.

[0027] The melt formed by the twin-screw extruder passes through the die head and the quenching roll to form an oil film, and the oil film is subjected to biaxial stretching, extraction, and heat setting to obtain ultra-high molecular weight polyethylene / poly(4-methyl-1-pentene) The microporous membrane of the present invention can be obtained by blending the microporous membrane. The performance test results are shown in Table 1.

Embodiment 3

[0029] According to 5 parts of TPX (commercially available, MX002) and 1 part of antioxidant (β-(3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate), 0.05 part of auxiliary antioxidant ( Pentaerythritol distearyl diphosphite) blend. Put the above mixed TPX and UHMWPE powder into the extruder at a ratio of 15:100, plasticize with paraffin oil, and blend evenly.

[0030] The melt formed by the twin-screw extruder passes through the die head and the quenching roll to form an oil film, and the oil film is subjected to biaxial stretching, extraction, and heat setting to obtain ultra-high molecular weight polyethylene / poly(4-methyl-1-pentene) The microporous membrane of the present invention can be obtained by blending the microporous membrane. The performance test results are shown in Table 1.

[0031] Table 1

[0032]

[0033] It can be seen from Table 1 that the ultra-high molecular weight polyethylene / poly(4-methyl-1-pentene) blended microporous membrane added with pol...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an ultra-high molecular polyethylene/poly (4-methyl-1-amylene) blended microporous membrane prepared with a thermally induced phase separation method and a preparation method thereof. The ultra-high molecular polyethylene/poly-4-methyl-1-amylene blended microporous membrane is prepared from the following components in parts by weight: 100 parts of ultra-high molecular polyethylene, 1 to 20 parts of poly (4-mehtyl-1-amylene), 0.1 to 5 parts of an antioxidant and 0.01 to 2 parts of an antioxidant aid. The molecular weight Mw of the ultra-high molecular polyethylene is 0.5*10<6> to 3*10<6>. The microporous membrane has the advantages that the poly (4-methyl-1-amylene) is high in melting point, high in vicat softening point, excellent in mechanical property, low in degree of crystallinity and high in gas permeability, so that the compound microporous membrane maintains excellent performance of TPX. Compared with the implementation of other modification methods, the equipment requirement is simple, and production can be carried out directly by needing slight improvement of original UHMWPE microporous membrane production equipment. The microporous membrane is a membrane with the thickness of 5 to 40 microns, the average pore size is 25 to 100 nanometers, the hot-shrinkage rate at the temperature of 130 DEG C is not more than 4.0, the tensile modulus is greater than 160 MPa, and the membrane rupture temperature is greater than 200 DEG C. The invention also discloses a preparation method of the microporous membrane.

Description

technical field [0001] The invention relates to the technical field of isolation membrane production, in particular to an ultrahigh molecular weight polyethylene / poly(4-methyl-1-pentene) blended microporous membrane prepared by a thermally induced phase separation method and a preparation method thereof. Background technique [0002] The currently marketed lithium battery separator is a polyolefin microporous membrane, and its materials mainly include polyethylene and polypropylene. This kind of microporous membrane has good performance and low price, and is widely used in 3C, energy storage and power fields. However, as the requirements for lithium-ion batteries in terms of voltage, power, electricity and safety are getting higher and higher, the heat resistance, liquid absorption and safety of traditional separators are increasingly unable to meet the requirements. Therefore, the development of modified diaphragms and new diaphragms has become a research hotspot that cann...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L23/06C08L23/20C08L91/06C08K5/134C08K5/524C08J5/18C08J9/26H01M2/16H01M2/14B29D7/01
CPCB29D7/01C08J5/18C08J9/26C08J2201/05C08J2323/06C08L23/06C08L2201/08C08L2203/16C08L2205/03C08L2207/068H01M50/403H01M50/409C08L23/20C08L91/06C08K5/1345C08K5/524Y02E60/10
Inventor 王郗高东波刘瑞
Owner HEFEI XINGYUAN NEW ENERGY MATERIAL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap