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Boron carbide reinforced paper-based friction material and preparation method thereof

A technology of paper-based friction material and boron carbide, which is applied in chemical instruments and methods, paper coatings, synthetic cellulose/non-cellulose material pulp/paper, etc., can solve problems such as poor high temperature stability, achieve good thermal performance, enhance Friction material performance and the effect of improving friction performance

Active Publication Date: 2014-04-23
盐城大数据资产经营管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the performance of boron carbide is greatly affected by temperature, so its high temperature stability is poor
However, so far, there are few reports on the research on boron carbide reinforced paper-based friction materials.

Method used

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  • Boron carbide reinforced paper-based friction material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Take 0.7g cashew nut shell oil modified phenolic resin and dissolve it in 60mL of absolute ethanol to obtain a phenolic resin solution. After the phenolic resin is fully dissolved, let it stand for 20 hours and seal it for preservation to obtain 60mL of A solution;

[0031] Step 2: Disperse 0.5 g of multi-walled carbon nanotubes with a diameter of 20-60 nm in 150 mL of 0.2% sodium dodecylsulfonate (SDS) aqueous solution, and stir magnetically for 5 hours until the multi-walled carbon nanotubes are uniformly dispersed , to get suspension B;

[0032] Step 3: Add 6g of chopped carbon fiber with a diameter of 6-18μm, 5g of bamboo fiber with a beating degree of 75°SR and 1g of boron carbide to each 60mL of water, and disperse evenly to obtain a mixed solution, then take 100g of suspension B and pour it into C solution is obtained in the mixed solution;

[0033] Step 4: Pour the C solution into the decomposer and disperse it for 1000r, take out the decomposed C solut...

Embodiment 2

[0037] Step 1: Take 1.2g of cashew nut shell oil modified phenolic resin, dissolve it in 70mL of absolute ethanol to obtain a phenolic resin solution, wait until the phenolic resin is fully dissolved, let it stand for 15 hours, seal it and save it, and obtain 70mL of A solution;

[0038] Step 2: Disperse 1 g of multi-walled carbon nanotubes with a diameter of 20-60 nm in 170 mL of an aqueous solution of sodium dodecylsulfonate (SDS) with a mass concentration of 0.25%, and stir magnetically for 5.5 hours until the multi-walled carbon nanotubes are uniformly dispersed. Obtain suspension B;

[0039] Step 3: Add 8g of chopped carbon fiber with a diameter of 6-18μm, 7g of bamboo fiber with a beating degree of 78°SR and 1.5g of boron carbide to each 70mL of water, and disperse evenly to obtain a mixed solution, then take 420g of suspension B and pour into the mixed solution to obtain the C solution;

[0040] Step 4: Pour the C solution into the decomposer and disperse for 1200r, ta...

Embodiment 3

[0043] Step 1: Take 2.25g of cashew nut shell oil modified phenolic resin, dissolve it in 80mL of absolute ethanol to obtain a phenolic resin solution, let it stand for 26 hours after the phenolic resin is fully dissolved, and seal it for storage to obtain 80mL of A solution;

[0044] Step 2: Disperse 2.5 g of multi-walled carbon nanotubes with a diameter of 20-60 nm in 250 mL of 0.3% sodium dodecylsulfonate (SDS) aqueous solution, and stir magnetically for 6 hours until the multi-walled carbon nanotubes are uniformly dispersed , to get suspension B;

[0045] Step 3: Add 10g of chopped carbon fiber with a diameter of 6-18μm, 9g of bamboo fiber with a beating degree of 80°SR and 2.5g of boron carbide to each 80mL of water, and disperse evenly to obtain a mixed solution, then take 200g of suspension B and pour into the mixed solution to obtain the C solution;

[0046] Step 4: Pour the C solution into the deconcentrator and disperse for 1500r, take out the C solution after decon...

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Abstract

The invention discloses a boron carbide reinforced paper-based friction material and a preparation method thereof. The preparation method comprises the following steps: dissolving cashew nut shell oil modified phenolic resin into absolute ethyl alcohol to obtain a solution A; dispersing multiwalled carbon nanotubes into a sodium dodecyl sulfate water solution to obtain a suspending liquid B; dispersing chopped carbon fiber, bamboo fiber and boron carbide into water, and then, adding the suspending liquid B to obtain a solution C; defibering the solution C, then, making sheets and drying to obtain a sample sheet D; and spraying the solution A on the sample sheet D, airing and carrying out hot press molding to obtain the boron carbide reinforced paper-based friction material, wherein the boron carbide reinforced paper-based friction material has the dynamic friction coefficient of 0.139-0.147 and the wear rate of 4.5*10<-8>. According to the invention, the paper-based friction material is prepared by adding boron carbide as reinforcing phase into the raw materials, so that the process is simple and easy to control, the braking stability and friction coefficient of the paper-based friction material can be greatly improved, the friction performance can be greatly improved, and the wear rate can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of friction materials, in particular to a boron carbide reinforced paper-based friction material and a preparation method thereof. Background technique [0002] Friction materials use friction to transmit torque and brake in the working process, which is an important material to ensure the stability and safety of vehicles, and its research work has attracted extensive attention from scholars at home and abroad and H. Jang2010 Tribological performance of brake friction materials containing carbon nanotubes wear. 268519-525]. [0003] As the most important wet friction material, paper-based friction material has high dynamic friction coefficient, stable friction torque, dynamic / static friction coefficient close to 1, low cost, stable bonding performance, low wear rate, long service life, low noise and protection Dual materials and other outstanding features have been widely used in today's automatic transmission and we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/50D21H17/67D21H19/28C09K3/14
Inventor 黄剑锋李文斌费杰王文静曹丽云刘艳云李瑞梓罗威杨朝
Owner 盐城大数据资产经营管理有限公司
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