Method for preparing wet friction material of nano silicon carbide modified carbon cloth

A technology of wet friction material and nano-silicon carbide, which is applied in the field of friction materials, can solve serious problems such as wear of dual materials, and reduce the service life of friction pairs, so as to achieve the effects of increasing service life, improving tribological performance, and reducing wear

Active Publication Date: 2013-09-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of alumina to the friction material, the wear of the material t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Dissolve 25g of cashew nut shell oil modified phenolic resin and 4g of nano-SiC powder in 160mL of absolute ethanol, then add γ-methacryloxypropyltrimethoxysilane (silane coupling agent KH-570 ), magnetically stirred for 3 hours to obtain a uniformly dispersed suspension A; wherein, every 100 g of suspension A contained 0.1 g of γ-methacryloxypropyltrimethoxysilane;

[0022] 2) Cut the plain cloth into a square shape of 12cm×12cm, soak it in absolute ethanol for 24 hours, take it out, and then dry it under natural conditions to obtain sample B;

[0023] 3) Soak sample B in suspension A for 1 hour, quickly take it out and dry it under natural conditions to get sample C;

[0024] 4) The sample C is hot-pressed on a vulcanizer, and the hot-press temperature of the vulcanizer is controlled at 160°C, the hot-press time is 5 minutes, and the hot-press pressure is 5MPa, and a nano-silicon carbide modified carbon cloth with stable friction and wear properties is obtained. w...

Embodiment 2

[0026] 1) Dissolve 30g of cashew nut shell oil modified phenolic resin and 10g of nano-SiC powder in 160mL of absolute ethanol, then add γ-methacryloxypropyltrimethoxysilane (silane coupling agent KH-570 ), magnetically stirred for 4 hours to obtain a uniformly dispersed suspension A; wherein, every 100 g of suspension A contained 0.2 g of γ-methacryloxypropyltrimethoxysilane;

[0027] 2) Cut the satin cloth into a square shape of 12cm×12cm, soak it in absolute ethanol for 24 hours, take it out, and then dry it under natural conditions to obtain sample B;

[0028] 3) Soak sample B in suspension A for 1 hour, quickly take it out and dry it under natural conditions to get sample C;

[0029] 4) The sample C was hot-pressed on a vulcanizer, and the hot-press temperature of the vulcanizer was controlled at 160°C, the hot-press time was 7 minutes, and the hot-press pressure was 6MPa, and a nano-silicon carbide modified carbon cloth with stable friction and wear properties was obtain...

Embodiment 3

[0031] 1) Dissolve 35g of nitrile rubber modified phenolic resin and 16g of nano-SiC powder in 160mL of absolute ethanol, then add γ-methacryloxypropyltrimethoxysilane (silane coupling agent KH-570 ), magnetically stirred for 4 hours to obtain a uniformly dispersed suspension A; wherein, every 100 g of suspension A contained 0.2 g of γ-methacryloxypropyltrimethoxysilane;

[0032] 2) Cut the plain cloth into a square shape of 12cm×12cm, soak it in absolute ethanol for 24 hours, take it out, and then dry it under natural conditions to obtain sample B;

[0033] 3) Soak sample B in suspension A for 1.5 hours, quickly take it out and dry it under natural conditions to get sample C;

[0034] 4) The sample C is hot-pressed on a vulcanizer, and the hot-press temperature of the vulcanizer is controlled at 160°C, the hot-press time is 8 minutes, and the hot-press pressure is 7MPa, and a nano-silicon carbide modified carbon cloth with stable friction and wear properties is obtained. wet...

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Abstract

The invention discloses a method for preparing a wet friction material of a nano silicon carbide modified carbon cloth. The method comprises the following steps: on the basis of taking carbon cloth, nano silicon carbide (SiC) and modified phenolic resin as materials, dissolving the nano SiC and the modified phenolic resin into an anhydrous ethanol solution at a certain ratio; adding a silane coupling agent, and magnetically stirring to obtain evenly dispersed suspension; immersing the preprocessed carbon cloth for 1-1.5 hours, naturally airing, and then carrying out hot press molding by adopting a vulcanizing machine to obtain the wet friction material of the nano silicon carbide modified carbon cloth. By adding certain content of nano SiC, excellent performance such as abrasive resistance, corrosion resistance, high thermal conductivity and high strength of the nano SiC can be integrated into the wet friction material of the carbon cloth. Thus, the tribological property of the wet friction material of the carbon cloth is greatly improved; abrasion of a dual material is greatly reduced due to the nanometer effect of the nano powder represented in a micro friction process; the service life of a friction pair is prolonged.

Description

technical field [0001] The invention belongs to the field of friction materials, and relates to a method for preparing nano silicon carbide modified carbon cloth wet friction materials. Background technique [0002] Wet friction material refers to the friction material that works in lubricating media such as lubricating oil and grease, and is used to realize the torsion transmission and braking function of the device. Mainly used in automotive automatic transmissions, differentials, synchronizers, torque managers and other wet clutches. [0003] Document 1 "Chinese Patent Publication No. CN102757621A" discloses a sintered friction material used for the brake of wind power generation equipment and its preparation method. By controlling the weight percentages of elementary components, lubricating components and friction components to be 78%, 14% and 8% respectively, and mixing, pressing and sintering the powders configured according to the ratio of each component, the copper-...

Claims

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Application Information

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IPC IPC(8): C09K3/14C08L61/14C08K13/04C08K7/06C08K3/34
Inventor 费杰王洪坤罗威黄剑锋王文静
Owner SHAANXI UNIV OF SCI & TECH
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