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Polyphenylene sulfide microporous membrane containing lamella structure and preparation method thereof

A technology of polyphenylene sulfide and polyphenylene sulfide resin, which is applied to flat products, other household appliances, applications, etc., can solve the problems of poor continuity and stability, complicated production process and high production cost, and achieves good continuity, Simple production process

Inactive Publication Date: 2017-04-26
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of this method is relatively complicated, the continuity and stability are poor, and the production cost is relatively high.
At present, there is no report on the technology of preparing polyphenylene sulfide microporous membranes with regular structure by melting and stretching polyphenylene sulfide resin.

Method used

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  • Polyphenylene sulfide microporous membrane containing lamella structure and preparation method thereof
  • Polyphenylene sulfide microporous membrane containing lamella structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add polyphenylene sulfide resin with a melt index of 0.1g / 10min to an extrusion casting machine, and melt extrusion casting to obtain a polyphenylene sulfide initial film. The melt extrusion temperature is 304°C, and the initial film is drummed at 140°C After heat treatment in air oven for 0.5h, stretch at 80°C at a speed of 10mm / min to 5% deformation, then at 130°C at a speed of 50mm / min to 40% deformation, heat setting temperature 140°C, The heat-setting time is 3 minutes, and a polyphenylene sulfide microporous membrane with a porosity of 20% is obtained, and the structure is good.

Embodiment 2

[0030] Add the polyphenylene sulfide resin with a melt index of 5g / 10min to the extrusion casting machine, and melt extrusion casting to obtain the initial polyphenylene sulfide film. The melt extrusion temperature is 310°C, and the initial film is blown at 200°C After heat treatment in the oven for 8 hours, stretch at 100°C at a speed of 30mm / min to a deformation of 40%, and then stretch at a speed of 80mm / min at 190°C to a deformation of 120%, heat setting temperature 210°C, heat setting After 10 minutes, a polyphenylene sulfide microporous membrane with a porosity of 60% was obtained, and the structure was good.

Embodiment 3

[0032] Add the polyphenylene sulfide resin with a melt index of 3g / 10min to the extrusion casting machine, and melt extrusion casting to obtain the initial film of polyphenylene sulfide. The melt extrusion temperature is 320°C, and the initial film is blown at 210°C After heat treatment in the oven for 2 hours, stretch at 80°C at a speed of 30mm / min to a deformation of 5%, and then at 200°C at a speed of 60mm / min to a deformation of 120%, heat setting temperature 210°C, heat setting After 10 minutes, a polyphenylene sulfide microporous membrane with a porosity of 50% was obtained, and the structure was good.

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Abstract

The invention relates to a polyphenylene sulfide microporous membrane containing a lamella structure and a preparation method thereof. The preparation method adopts an extrusion curtain coating-melt stretching method, and comprises the following specific steps: polyphenylene sulfide (PPS) particles are added in an extrusion curtain coating machine for curtain coating to obtain a polyphenylene sulfide base membrane; the polyphenylene sulfide base membrane is heated at 140-240 DEG C for 0.5-8 h to obtain a heat treatment membrane; and the heat treatment membrane is subjected to hot and cold drawing to generate microholes, and then heat shaping treatment is conducted to obtain the polyphenylene sulfide microporous membrane with uniform aperture size distribution and excellent microhole structure. Compared with a traditional preparation method, the preparation method is simple in process and easy to operate, no secondary component organic solvent is added in the preparation process, and no pollutant is generated so as to accord with environment-friendly production ideas; the obtained microporous membrane is excellent in size stability and mechanical strength; and the size and the distribution of the microholes can be effectively controlled through controlling the stretching temperature and the stretching ratio parameters.

Description

technical field [0001] The invention relates to a preparation method of a microporous membrane, in particular to a polyphenylene sulfide microporous membrane containing a lamella structure and a preparation method thereof, belonging to the technical field of isolation membrane production. Background technique [0002] The diaphragm is the core component of lithium-ion batteries, accounting for about 18-30% of the cost of the entire lithium battery. Its performance plays a vital role in the overall performance of lithium batteries, and it is also one of the key technologies restricting the development of lithium batteries one. With the development of electronic products and the expansion of application fields, people have higher and higher requirements for the performance of lithium batteries. In order to meet the development requirements of lithium batteries, the separator should have high mechanical strength, excellent thermal stability, relatively Good micropore distribut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/00B29C41/24B29C71/02B29C55/02B29K81/00B29L7/00
CPCB29C69/00B29C41/24B29C55/02B29C71/02B29K2081/04B29L2007/00
Inventor 苏植祥雷彩红徐睿杰谢嘉宜闵卫星
Owner GUANGDONG UNIV OF TECH
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