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Whisker-modified paper-based friction material and preparation method thereof

A paper-based friction material and technology of friction material, applied in chemical instruments and methods, synthetic cellulose/non-cellulose material pulp/paper, paper, etc., can solve the problems of low wear rate, unsuitable for wet working conditions, etc. Reduced wear rate, less wear and less dual damage

Active Publication Date: 2013-10-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The Chinese patent "A non-asbestos whisker friction material and its preparation method" with the application number of 200710190537.9 uses 15-20% whisker material in the friction material to improve the heat resistance and bearing capacity of the friction material. The prepared The material has excellent properties such as high friction coefficient and low wear rate, but this material is a dry friction material, which is not suitable for wet working conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) 39.9g of polyacrylonitrile-based carbon fiber, 5.6g of aramid fiber, 4.8g of paper fiber, 13.4g of potassium hexatitanate whisker and 14.7g of kaolin soaked in nitric acid with a mass concentration of 10% for 5 minutes Beating and mixing. In the wet beating and mixing process, add an ethanol solution containing 0.8 g of sodium dodecylbenzene sulfonate and a mass concentration of 3% sodium dodecylbenzene sulfonate. After the wet beating is evenly mixed, The obtained mixed slurry is formed on a paper machine to obtain a friction material preform; the friction material preform is squeezed and dewatered in a rolling device, and then placed in the air to dry, and the mass of the friction material preform after drying is weighed , Denoted as W 1 ;

[0024] 2) Dissolve cashew nut shell liquid modified phenolic resin in ethanol solvent to make a 15% mass concentration of cashew nut shell liquid modified phenolic resin ethanol solution, and then immerse the dried friction materi...

Embodiment 2

[0028] 1) 41.8g of pitch-based carbon fiber, 5.3g of aramid fiber, 5.1g of paper fiber, 14.2g of potassium hexatitanate whiskers, 8.7g of quartz powder and 5g of kaolin were immersed in nitric acid with a mass concentration of 12% for 8 minutes. Wet beating and mixing. During the wet beating and mixing process, add an ethanol solution containing 0.9g of sodium dodecylbenzene sulfonate and a mass concentration of 3% sodium dodecylbenzene sulfonate. After the wet beating is evenly mixed , The obtained mixed slurry is formed on a paper machine to obtain a friction material preform; the friction material preform is squeezed and dehydrated in a roller pressing device, and then placed in the air to dry, and the dried friction material preform is weighed The quality, denoted as W 1 ;

[0029] 2) Dissolve boron-modified phenolic resin in ethanol solvent to make a 13% mass concentration of boron-modified phenolic resin ethanol solution, and then immerse the dried friction material preform...

Embodiment 3

[0033] 1) 43.7g of pitch-based carbon fiber, 5.1g of aramid fiber, 4.9g of paper fiber, 12.7g of potassium hexatitanate whisker and 13.6g of diatomaceous earth immersed in nitric acid with a mass concentration of 15% for 10 minutes Beating and mixing. During the wet beating and mixing process, add an ethanol solution containing 1.1 g of sodium dodecylbenzene sulfonate and a mass concentration of 3% sodium dodecylbenzene sulfonate. After the wet beating is evenly mixed, The obtained mixed slurry is formed on a paper machine to obtain a friction material preform; the friction material preform is squeezed and dehydrated in a roller pressing device, and then placed in the air to dry, and the mass of the friction material preform after drying is weighed , Denoted as W 1 ;

[0034] 2) Dissolve the nitrile modified phenolic resin in an ethanol solvent to make an ethanol solution of the nitrile modified phenolic resin with a mass concentration of 11%, and then immerse the dried friction ...

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Abstract

The invention provides a whisker-modified paper-based friction material and a preparation method thereof. The friction material comprises, by mass, 45 to 55% of a fiber, 5 to 15% of a whisker, 15 to 25% of a modified phenolic resin, 10 to 15% of an inorganic filling material and 1% of a dispersant. The preparation method adopts traditional preparation technology for a paper-based friction material and comprises the following steps: uniformly mixing the fiber, the whisker and the filling material in water for pulping, carrying out papermaking and shaping so as to obtain a prefabricated friction material and drying the prefabricated friction material; and preparing a modified phenolic resin ethanol solution by dissolving the modified phenolic resin in an ethanol solvent, impregnating the prefabricated friction material with the modified phenolic resin ethanol solution and carrying out hot pressing and curing after evaporation of the solvent so as to obtain the whisker-modified paper-based friction material. The whisker-modified paper-based friction material can be used under a wet oil lubrication condition and has the advantages of a high dynamic friction coefficient, a low wear rate and small erosion of couple materials.

Description

Technical field [0001] The invention relates to a paper-based friction material and a preparation method thereof, in particular to a paper-based friction material modified with whiskers and a preparation method thereof. Background technique [0002] The wet friction materials used in wet clutches are required to have a series of excellent dynamic and static friction coefficients, long service life, smooth shifting, and able to withstand thermal shocks under overload conditions, and less damage to the mating disc during braking. performance. [0003] The Chinese patent "Wet-type paper-based friction material and its friction sheet" with application number 200810186911.2 uses 3-8% carbon fiber, 5-10% carbon powder, 5-10% diatomaceous earth, and 5-10% iron oxide improves the temperature resistance and abrasion resistance of general paper-based friction materials, and to a certain extent makes up for some defects of general paper-based friction materials. However, this technology int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/50D21H17/67D21H17/68D21H17/48D21H17/66C09K3/14
Inventor 费杰罗威黄剑锋曹丽云杨柳青冯光帆王文静王洪坤齐之刚夏彬
Owner SHAANXI UNIV OF SCI & TECH
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