Aramid fiber coating liquid, preparation method thereof, diaphragm based on aramid fiber coating liquid and application

A coating liquid, aramid fiber technology, applied in the direction of electrical components, circuits, battery pack components, etc., can solve the problem of time-consuming and power consumption

Active Publication Date: 2020-01-17
HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] It takes a lot of time to dissolve the aramid fiber while making the meta-aramid slurry, and it ne

Method used

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  • Aramid fiber coating liquid, preparation method thereof, diaphragm based on aramid fiber coating liquid and application
  • Aramid fiber coating liquid, preparation method thereof, diaphragm based on aramid fiber coating liquid and application
  • Aramid fiber coating liquid, preparation method thereof, diaphragm based on aramid fiber coating liquid and application

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] A preparation method of aramid coating liquid includes the following steps:

[0037] 1) Mix ceramic particles (alumina) and dimethylacetamide (DMAc) and stir for 30 minutes. Sand mill with a rod-pin nano sand mill for 20 minutes to obtain the first mixture, wherein the speed of the sand mill is 900r / min, and the ratio of ceramic particles to dimethylacetamide is 15:70 in parts by mass; In the test, the particle size of the ceramic particles in the first mixture is D50: 0.3 μm and D90: 1 μm.

[0038] 2) Under a nitrogen atmosphere, stir the first mixture with m-phenylenediamine for 20 minutes, after stirring, the temperature is cooled to 0°C through a chilled water bath, and then isophthaloyl chloride is added and stirred for 20 minutes (the process temperature is 0°C ), remove the water bath, and then raise the temperature to 80°C at a rate of 6°C / min. Add calcium hydroxide and stir for 30min (the process temperature is 80°C) to obtain the second mixture. ...

Example Embodiment

[0040] Example 2

[0041] A preparation method of aramid coating liquid includes the following steps:

[0042] 1) Mix ceramic particles (silica) and dimethylacetamide (DMAc) and stir for 30 minutes. Sand mill with a rod-pin nano sand mill for 20 minutes to obtain the first mixture, wherein the speed of the sand mill is 900r / min, and the ratio of ceramic particles to dimethylacetamide is 17:75 in parts by mass; According to the test, the particle size of the ceramic particles in the first mixture is D50: 0.5 μm and D90: 1.2 μm.

[0043] 2) Under a nitrogen atmosphere, stir the first mixture and m-phenylenediamine for 20 minutes, after stirring, cool down to 2°C in a chilled water bath, add isophthaloyl chloride, and stir for 20 minutes (the process temperature is 2°C) ), remove the water bath, and then raise the temperature to 80°C at a rate of 7°C / min. Add calcium hydroxide and stir for 30min (the process temperature is 80°C) to obtain the second mixture, in which, in parts by mass...

Example Embodiment

[0045] Example 3

[0046] A preparation method of aramid coating liquid includes the following steps:

[0047] 1) Mix ceramic particles (barium titanate) and dimethylacetamide (DMAc) and stir for 30 minutes. Sand grind with a rod-pin nano sand mill for 20 minutes to obtain the first mixture, wherein the speed of the sand mill is 900r / min, and the ratio of ceramic particles to dimethylacetamide is 20:80 in parts by mass; According to the test, the particle size of the ceramic particles in the first mixture is D50: 0.6 μm and D90: 1.3 μm.

[0048] 2) Under a nitrogen atmosphere, stir the first mixture with m-phenylenediamine for 20 minutes, after stirring, the temperature is cooled to 5°C through a chilled water bath, and then isophthaloyl chloride is added and stirred for 20 minutes (the process temperature is 5°C) ), remove the water bath, and then raise the temperature to 80°C at a rate of 8°C / min. Add calcium hydroxide and stir for 30min (the process temperature is 80°C) to obtai...

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Abstract

The invention discloses an aramid fiber coating liquid, a preparation method thereof, a diaphragm based on the aramid fiber coating liquid and application, the preparation method comprises the following steps: stirring and sanding ceramic particles and dimethylacetamide to obtain a first mixture; under the atmosphere of nitrogen or inert gas, stirring the first mixture and m-phenylenediamine, cooling to 0-5 DEG C after stirring, adding isophthaloyl dichloride, stirring, heating to 78-90 DEG C after stirring, adding calcium hydroxide, and stirring to obtain a second mixture; and mixing and stirring the second mixture and an organic matter, and adjusting the viscosity to 280-400 mpa.s to obtain the aramid fiber coating liquid. Starting from the synthesis direction, substances required by a diaphragm coating are added in the synthesis process, so that the pulping time is shortened while the cost is saved, and the safety performance of thermal shrinkage, needling and the like of the aramidfiber diaphragm is improved.

Description

technical field [0001] The invention belongs to the technical field of battery diaphragms, and in particular relates to an aramid fiber coating liquid and a preparation method thereof, a diaphragm based on the aramid fiber coating liquid and its application. Background technique [0002] It takes a lot of time to dissolve the aramid fiber while making meta-aramid slurry, and it needs continuous heating and stirring while dissolving the aramid fiber, which consumes time and electricity. [0003] In terms of the performance of the currently produced meta-aramid coating film, the MD and TD shrinkage values ​​at 130°C are ≥5%, and the acupuncture strength is ≤6N, and the production process needs at least 8 hours. [0004] Now it is necessary to invent a meta-aramid fiber coating slurry that improves the thermal shrinkage rate and saves production time. Contents of the invention [0005] Aiming at the deficiencies in the prior art, the object of the present invention is to pro...

Claims

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Application Information

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IPC IPC(8): H01M2/14H01M2/16
CPCH01M50/403H01M50/411H01M50/44Y02E60/10
Inventor 袁海朝徐锋李腾苏碧海
Owner HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
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