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Aramid dissolved solution and preparation method of aramid dissolved solution as well as aramid membrane coating solution and production method of aramid membrane coating solution, and membrane

A technology of dissolving solution and coating solution, which is applied in the direction of coating, polyamide coating, electrical components, etc., can solve the problems of large thermal shrinkage and affecting service life, and achieve the effect of improving thermal shrinkage rate and simple operation

Inactive Publication Date: 2018-11-23
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

[0003] In the prior art, the thermal shrinkage of the coated diaphragm is relatively large, which affects its service life

Method used

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  • Aramid dissolved solution and preparation method of aramid dissolved solution as well as aramid membrane coating solution and production method of aramid membrane coating solution, and membrane
  • Aramid dissolved solution and preparation method of aramid dissolved solution as well as aramid membrane coating solution and production method of aramid membrane coating solution, and membrane
  • Aramid dissolved solution and preparation method of aramid dissolved solution as well as aramid membrane coating solution and production method of aramid membrane coating solution, and membrane

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preparation example Construction

[0027] An embodiment of the present invention provides a method for preparing an aramid fiber solution, including:

[0028] S1. Dissolving the auxiliary solvent in the organic solvent to obtain the first solution.

[0029] Further, the organic solvent is selected from the group consisting of dimethylacetamide (DMAC), N-methylpyrrolidone (NMP), N,N-dimethylformamide (DMF) or dimethyl phthalate (DMP) Any kind.

[0030] Dimethylacetamide, molecular formula CH 3 CON(CH 3 ) 2 , Colorless transparent liquid, low toxicity, flammable. It can be mixed with organic solvents such as water, alcohol, ether, ester, benzene, chloroform and aromatic compounds.

[0031] Methylpyrrolidone, a colorless transparent oily liquid with a slight amine odor. Low volatility, good thermal and chemical stability, and can evaporate with water vapor. It is hygroscopic. Sensitive to light. It is easily soluble in water, ethanol, ether, acetone, ethyl acetate, chloroform and benzene, and can dissolve most organi...

Embodiment 1

[0071] This embodiment provides an aramid diaphragm coating liquid, which is prepared as follows:

[0072] CaCl 2 Dissolved in DMAC solvent, among them, CaCl 2 The mass of the meta-aramid is 1wt% of the DMAC solvent; then the meta-aramid is dissolved in the DMAC solvent, and the mass of the meta-aramid is 7wt% of the DMAC solvent. Heat and stir in a water bath for 4 hours until the aramid fiber is completely dissolved, isolate the air, and place it to room temperature to prepare an aramid solution.

[0073] Add the pore former to the aramid dissolving liquid, where the mass of the pore former is 4% of the aramid dissolving liquid, fully agitate it, and put it into the alumina particle slurry dispersed in the DMAC solvent, where the alumina particles account for 20wt% of the total mass of DMAC solvent. Stir evenly, filter out the material, and finish the coating slurry of aramid membrane.

Embodiment 2

[0075] This embodiment provides an aramid diaphragm coating liquid, which is prepared as follows:

[0076] Dissolve LiCl in NMP solvent, where the mass of LiCl is 4wt% of NMP solvent; then dissolve meta-aramid in NMP solvent, and the mass of meta-aramid is 15wt% of NMP solvent. Heat and stir in a water bath for 7 hours until the aramid fiber is completely dissolved, isolate the air, and place it to room temperature to prepare an aramid solution.

[0077] The pore former is added to the aramid dissolving solution, where the mass of the pore former is 6% of the aramid dissolving solution, fully agitated, and then put into the alumina particle slurry dispersed in NMP solvent, in which alumina particles account for 30wt% of the total mass of NMP solvent. Stir evenly, filter out the material, and finish the coating slurry of the aramid membrane.

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Abstract

The invention relates to the technical field of coating, and particularly relates to an aramid dissolved solution and a preparation method of the aramid dissolved solution as well as an aramid membrane coating solution and a production method of the aramid membrane coating solution, and membrane. The production method of the aramid membrane coating solution comprises the following steps: adding apore-forming agent into the aramid dissolved solution; performing uniform stirring to obtain a first dispersion solution; adding ceramic material granules into an organic solvent to obtain the seconddispersion solution; uniformly mixing and stirring the first dispersion solution the second dispersion solution; performing filtration and discharging. The method has the advantages of simple preparation and strong feasibility. According to the method, dissolved meta-aramid is adopted, so that the cost is reduced, the original viscosity and property of the meta-aramid membrane coating solution arekept to the maximum limit, the performance of the aramid membrane coating solution is improved, a heat shrinkage ratio at 130 DEG C is reduced by 8 to 10 percent, the acupuncture strength is improvedby 4 to 5 percent, the air permeability is reduced by 5 to 8 percent, and the tensile strength is increased by 4 to 5 percent.

Description

Technical field [0001] The present invention relates to the technical field of coating, in particular to an aramid dissolving liquid and a preparation method thereof, an aramid diaphragm coating liquid and a preparation method thereof, and a diaphragm. Background technique [0002] Through the coating process, one can improve the thermal stability of the separator, improve its mechanical strength, and prevent large-area contact between the positive and negative electrodes caused by the shrinkage of the separator; the other is to improve its puncture resistance and prevent long-term cycling lithium dendrites. Short-circuit caused by passing through the diaphragm; third, the porosity of the ceramic coating is greater than that of the diaphragm, which is beneficial to enhance the liquid retention and wettability of the diaphragm. [0003] In the prior art, the thermal shrinkage of the coated diaphragm is relatively large, which affects its service life. Summary of the invention [000...

Claims

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Application Information

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IPC IPC(8): C09D177/10C09D7/61C08J3/11C08L77/10H01M2/16
CPCC08J3/11C08J2377/10C08K3/22C08K2003/2227H01M50/411H01M50/449C09D177/10Y02E60/10
Inventor 徐锋袁海朝李腾苏碧海
Owner HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
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