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A kind of polymer film and preparation method thereof

A polymer film, perfluorosulfonic acid resin technology, applied in structural parts, battery pack parts, electrical components, etc., can solve the problem of poor longitudinal tensile strength, achieve improved longitudinal tensile strength, good activation and dispersion effect, excellent film performance

Active Publication Date: 2021-07-30
广元瑞峰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a polymer film and its preparation method to solve the problem of poor longitudinal tensile strength of the polymer film produced in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of described polymer film, comprises the steps:

[0027] S1: Heat perfluorosulfonic acid resin and urea-formaldehyde resin to 135-152°C and melt to obtain a liquid rubber, then add chlorinated paraffin and stearic acid to the liquid rubber, continue to heat up to 172-185°C, and then Stir at 1200-1400r / min for 0.7-1.5h, cool to room temperature to obtain the base material;

[0028] S2: Mix microcrystalline cellulose, graphene microflakes, nano-silicon carbide, cordierite powder, and nano-ceramic powder evenly, stir after heating up, add fatty alcohol polyoxyethylene ether sodium sulfate, potassium trimethylsiliconate, and zinc ethoxide Mix evenly, heat up to 140-156°C, stir at 1100-1300r / min for 1.5-2.5h, cool to room temperature to obtain surface-modified fillers;

[0029] S3: Warm up the base material prepared in step S1, the surface modified filler and chitosan prepared in step S2 to 132-145°C and stir at 1000-1200r / min for 1-1.5h, then extrude...

Embodiment 1

[0032] A kind of polymer film, in weight part, comprises following raw material: 95 parts of perfluorosulfonic acid resin, 22 parts of urea-formaldehyde resin, 14 parts of chitosan, 6 parts of microcrystalline cellulose, 1 part of graphene microchip, nano 8 parts of silicon carbide, 7 parts of cordierite powder, 8 parts of nano-ceramic powder, 5 parts of chlorinated paraffin, 7 parts of stearic acid, 0.8 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 4.2 parts of potassium trimethylsiliconate, ethanol Zinc 2 parts;

[0033] The preparation method of described polymer film, comprises the steps:

[0034] S1: Heat up perfluorosulfonic acid resin and urea-formaldehyde resin to 138°C and melt to obtain liquid rubber, then add chlorinated paraffin and stearic acid to the liquid rubber, continue to heat up to 175°C, and rotate at 1200r / min Stir for 1.5h, cool to room temperature to obtain the base material;

[0035] S2: Mix microcrystalline cellulose, graphene microfl...

Embodiment 2

[0038] A kind of polymer film, in weight part, comprises following raw material: 115 parts of perfluorosulfonic acid resin, 32 parts of urea-formaldehyde resin, 18 parts of chitosan, 9 parts of microcrystalline cellulose, 1.6 parts of graphene microchip, nano 10 parts of silicon carbide, 9 parts of cordierite powder, 10 parts of nano-ceramic powder, 8 parts of chlorinated paraffin, 12 parts of stearic acid, 1 part of fatty alcohol polyoxyethylene ether sodium sulfate, 5 parts of potassium trimethylsiliconate, ethanol 3 parts of zinc;

[0039] The preparation method of described polymer film, comprises the steps:

[0040] S1: Heat up perfluorosulfonic acid resin and urea-formaldehyde resin to 145°C and melt to obtain liquid rubber, then add chlorinated paraffin and stearic acid to the liquid rubber, continue to heat up to 180°C, and rotate at 1300r / min Stir for 1h, cool to room temperature to obtain the base material;

[0041]S2: Mix microcrystalline cellulose, graphene micro...

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Abstract

The invention discloses a polymer film and a preparation method thereof. The polymer film comprises the following raw materials in parts by weight: 92-135 parts of perfluorosulfonic acid resin, 20-40 parts of urea-formaldehyde resin, chitosan 12‑23 parts, 6‑10 parts of microcrystalline cellulose, 1‑2 parts of graphene microflakes, 8‑13 parts of nano silicon carbide, 6‑15 parts of cordierite powder, 8‑12 parts of nano ceramic powder, chlorinated paraffin 5-9 parts, 7-16 parts of stearic acid, 0.7-1.3 parts of sodium fatty alcohol polyoxyethylene ether sulfate, 4-6 parts of potassium trimethylsiliconate, 1.6-3.5 parts of zinc ethylate, and the polymer film is passed through It is prepared by preparing base material, preparing surface modified filler, high temperature shearing, plasticizing, heat setting and other steps. The longitudinal tensile strength of the polymer film of the present invention is relatively large, reaching more than 127.3 MPa, and the film performance is excellent, which can meet the needs of actual use and application requirements, and can be vigorously popularized and applied.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation, and in particular relates to a polymer membrane and a preparation method thereof. Background technique [0002] Lithium batteries have developed rapidly in recent years, but the safety and high performance of lithium batteries have always been the key issues restricting their development. The separator is an electrically insulating film with a porous structure. Its main function is to isolate the positive and negative electrodes and prevent the electrons in the battery from It passes through itself, and at the same time allows ions in the electrolyte to pass freely between the positive and negative electrodes. Its performance determines the interface structure, internal resistance, etc. of the battery, and directly affects the capacity, cycle performance and other characteristics of the battery. [0003] The Chinese patent application document "Composite Stable Lithium Battery Separa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22C08L27/18C08L61/24C08L5/08C08L1/04C08L91/06C08L71/02C08K13/04C08K7/00C08K3/04C08K3/34C08K3/00C08K5/09C08K5/057C08K5/5415H01M50/403H01M50/411
CPCC08J5/2275C08J2327/18C08J2401/04C08J2405/08C08J2461/24C08J2471/02C08J2491/06C08K3/00C08K3/34C08K5/057C08K5/09C08K5/5415C08K7/00C08K13/04C08K2201/011C08K3/042
Inventor 毛泽龙
Owner 广元瑞峰新材料有限公司
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