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A microporous polymer membrane

A polymer film, microporous technology, applied in structural parts, electrical components, battery pack components, etc., can solve problems such as poor tensile strength, improve longitudinal tensile strength, improve structural toughness, and strong permeability Effect

Active Publication Date: 2020-12-22
河南银金达新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a microporous polymer membrane to solve the problem of poor tensile strength existing in existing membranes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] In an embodiment, the microporous polymer membrane includes the following raw materials in parts by mass: 50-68 parts of polypropylene, 0.8-1.2 parts of nucleating agent, 0.4-0.9 part of thickener, 3- 5 parts of binder, 0.2-0.5 parts of wetting agent, 3-6 parts of triethylene glycol dimethacrylate, 0.3-0.7 parts of sodium cetylbenzenesulfonate, 2-5 parts of trimethylsilanol Sodium, 1-2 parts of zinc pentaerythritol, the nucleating agent includes one or more of metal salt and dicarboxylic acid complexes, condensed ring compounds, aromatic amine compounds and rare earth compounds; the thickening The agent is carboxymethyl ethyl ether cellulose; the binding agent is 3-methoxymethyl acrylate; the wetting agent is polyoxyethylene lauryl ether; its preparation method comprises the following steps:

[0026] (1) After mixing the above raw materials in parts by mass, stir for 16-23min at a microwave power of 120-250W, a temperature of 48-55°C, and a rotation speed of 200-300r / mi...

Embodiment 1

[0031] A kind of microporous polymer film, with mass parts as unit, comprises following raw material: 60 parts of polypropylene (the product of F401 model that Sinopec Yangzi Petrochemical Co., Ltd. provides, isotacticity is 98%), 1 part of nucleation Agent (DX-Z3C model product provided by Dongguan Dingxin Plastic Raw Materials Co., Ltd.), 0.7 parts of thickener, 4 parts of binder, 0.3 parts of wetting agent, 5 parts of triethylene glycol dimethacrylate, 0.6 parts of sodium cetylbenzenesulfonate, 3 parts of sodium trimethylsiliconate, 1.6 parts of zinc pentaerythritol; the thickener is carboxymethyl ethyl ether cellulose; the binder is 3-methoxy Methyl acrylate; Described wetting agent is polyoxyethylene lauryl ether; Its preparation method comprises the following steps:

[0032] (1) After mixing the above raw materials in parts by mass, stir for 20 minutes at a microwave power of 200W, a temperature of 52°C, and a rotation speed of 250r / min to obtain a mixture;

[0033] (2)...

Embodiment 2

[0036]A kind of microporous polymer film, with mass part as unit, comprises following raw material: 52 parts of polypropylene (the product of F401 model that Sinopec Yangzi Petrochemical Co., Ltd. provides, isotacticity is 98%), 0.8 part of nucleation Agent (DX-Z3C model product provided by Dongguan Dingxin Plastic Raw Materials Co., Ltd.), 0.5 parts of thickener, 3 parts of binder, 0.2 parts of wetting agent, 3 parts of triethylene glycol dimethacrylate, 0.3 parts of sodium cetylbenzenesulfonate, 2.3 parts of sodium trimethylsiliconate, 1 part of zinc pentaerythritol; the thickener is carboxymethyl ethyl ether cellulose; the binder is 3-methoxy Methyl acrylate; Described wetting agent is polyoxyethylene lauryl ether; Its preparation method comprises the following steps:

[0037] (1) After mixing the above raw materials in parts by mass, stir for 22 minutes at a microwave power of 150W, a temperature of 48°C, and a rotation speed of 200r / min to obtain a mixture;

[0038] (2) ...

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Abstract

The invention discloses a microporous polymer membrane, which comprises the following raw materials in parts by mass: 50-68 parts of polypropylene, 0.8-1.2 parts of nucleating agent, 0.4-0.9 parts of thickener, 3-5 parts of Binder, 0.2-0.5 parts of wetting agent, 3-6 parts of triethylene glycol dimethacrylate, 0.3-0.7 parts of sodium cetylbenzenesulfonate, 2-5 parts of sodium trimethylsiliconate, 1‑2 parts zinc pentaerythritol. The microporous polymer membrane of the present invention has the advantages of continuous production, simple process operation, and low energy consumption; in addition, the microporous polymer membrane of the present invention has high longitudinal tensile strength and long service life, which can meet the requirements of popularization and application. need.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation, and in particular relates to a microporous polymer membrane. Background technique [0002] Lithium-ion batteries rely primarily on the movement of lithium ions between the positive and negative electrodes to function. There is a layer of membrane material between the positive and negative electrodes of the lithium-ion battery, usually called the diaphragm, which is an important part of the lithium-ion battery. The separator has two basic functions: to isolate the positive and negative electrodes and prevent short circuit in the battery; to be wetted by the electrolyte to form a channel for ion migration. In practical applications, it should also have the following characteristics: (1) electronic insulation; (2) high electrical conductivity; (3) good mechanical properties, which can be processed by mechanical manufacturing; (4) uniform thickness; (5) when heated Dimensional stabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16H01M2/14
Inventor 李国庆李航樊鹏鹏蔡文彬仲宁宁
Owner 河南银金达新材料股份有限公司
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