A whisker-modified paper-based friction material and its preparation method

A paper-based friction material and friction material technology, applied in chemical instruments and methods, synthetic cellulose/non-cellulose material pulp/paper, paper, etc., can solve the problems of not being suitable for wet working conditions, low wear rate, etc., and achieve Less wear, lower wear rate, and less damage to the pair

Active Publication Date: 2016-04-06
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 fibers, 5.6g of aramid fibers, 4.8g of paper fibers, 13.4g of potassium hexatitanate whiskers, and 14.7g of kaolin clay were soaked for 5 minutes in nitric acid with a mass concentration of 10%. Beating and mixing, adding 0.8g sodium dodecylbenzene sulfonate and an ethanol solution of 3% sodium dodecylbenzene sulfonate in the wet beating and mixing process, after wet beating and mixing, the The obtained mixed slurry is molded on a paper machine to obtain a friction material preform; the friction material preform is pressed and dehydrated in a roller pressing device, and then placed in the air to dry, and the weight of the friction material preform after drying is weighed , denoted as W 1 ;

[0024] 2) Dissolve cashew nut shell oil-modified phenolic resin in an ethanol solvent to make a cashew nut shell oil-modified phenolic resin ethanol solution with a mass concentration of 15%, and then impregnate the dried friction material...

Embodiment 2

[0028] 1) Add 41.8g of pitch-based carbon fiber, 5.3g of aramid fiber, 5.1g of paper fiber, 14.2g of potassium hexatitanate whisker, 8.7g of quartz powder and 5g of kaolin to water soaked with 12% nitric acid for 8 minutes Wet beating and mixing, during the wet beating and mixing process, add an ethanol solution containing 0.9g sodium dodecylbenzene sulfonate and a mass concentration of 3% sodium dodecylbenzene sulfonate, and wait until the wet beating is evenly mixed , the obtained mixed slurry was molded on a paper machine to obtain a friction material preform; the friction material preform was pressed and dehydrated in a roller press, and then placed in the air to dry, and the friction material preform after drying was weighed The quality of , denoted as W 1 ;

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

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 soaked with 15% nitric acid for 10 minutes were wetted with water Beating and mixing, adding 1.1g sodium dodecylbenzene sulfonate and an ethanol solution of sodium dodecylbenzene sulfonate with a mass concentration of 3% in the wet beating and mixing process, after wet beating and mixing, the The obtained mixed slurry is molded on a paper machine to obtain a friction material preform; the friction material preform is pressed and dehydrated in a roller pressing device, and then placed in the air to dry, and the weight of the friction material preform after drying is weighed , denoted as W 1 ;

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

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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 whisker-modified paper-based friction material and a preparation method thereof. Background technique [0002] The wet friction material used in the wet clutch is required to have a series of excellent properties such as high coefficient of dynamic friction and static friction, long service life, smooth shifting and can withstand thermal shock under overload conditions, and little damage to the dual disc during braking. performance. [0003] The Chinese patent "wet 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, 5-10% iron oxide improves the temperature resistance and wear resistance of general paper-based friction materials, and makes up for some defects of general paper-based friction materials to a certain extent. However, th...

Claims

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Application Information

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Patent Type & Authority Patents(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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