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Preparation method of rare earth-modified paper base friction material

A technology of paper-based friction material and rare earth modification, which is applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, paper, papermaking, etc., to achieve the effect of improving flatness, simple and easy-to-control process, and not easy to settle

Active Publication Date: 2014-01-29
盐城抱璞文化传媒有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, rare earth compounds have not been used in paper-based friction materials

Method used

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  • Preparation method of rare earth-modified paper base friction material

Examples

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Embodiment 1

[0026] Step 1: Take 0.7g of cashew nut shell oil modified phenolic resin, dissolve it in 60mL of absolute ethanol to obtain a phenolic resin solution, wait for the phenolic resin to fully dissolve and let it stand for 20 hours, seal it and store it to obtain A solution;

[0027] Step 2: Disperse 0.5 g of multi-walled carbon nanotubes with a diameter of 30-50 nm in 100 mL of 0.1% sodium dodecylsulfonate (SDS) aqueous solution, and stir magnetically for 4 hours until the multi-walled carbon nanotubes are uniformly dispersed , to obtain suspension B, and then add 50mL of nitrate solution of rare earth elements with a mass concentration of 1% (dissolve cerium nitrate in water and stir evenly, and the mass concentration of cerium nitrate is 1%) to 100mL of suspension In liquid B, suspension C is obtained;

[0028] Step 3: 6 g of chopped carbon fibers with a diameter of 8-15 μm are added to every 50 mL of water, and 5 g of them have a beating degree of 75. SR bamboo fiber and 1g of...

Embodiment 2

[0032] 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 24 hours, seal it and save it, and obtain A solution;

[0033]Step 2: Disperse 1 g of multi-walled carbon nanotubes with a diameter of 30-50 nm in 170 mL of an aqueous solution of sodium dodecylsulfonate (SDS) with a mass concentration of 0.2%, and stir magnetically for 5 hours until the multi-walled carbon nanotubes are uniformly dispersed. To obtain suspension B, add 60mL of nitrate solution of rare earth elements with a mass concentration of 2% (dissolved lanthanum nitrate in water and stir evenly, and the mass concentration of lanthanum nitrate is 1%) to 170mL of suspension In B, suspension C is obtained;

[0034] Step 3: Add 8 g of chopped carbon fibers with a diameter of 8-15 μm to every 60 mL of water, and 7 g of beating degree is 78. SR bamboo fiber and ...

Embodiment 3

[0038] 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, wait for the phenolic resin to fully dissolve and let it stand for 26 hours, seal it and store it to obtain A solution;

[0039] Step 2: Disperse 2.5 g of multi-walled carbon nanotubes with a diameter of 30-50 nm in 250 mL of 0.3% sodium dodecylsulfonate (SDS) aqueous solution, and stir magnetically for 5.5 hours until the multi-walled carbon nanotubes are uniformly dispersed , to obtain suspension B, and then 70mL of nitrate solution of rare earth elements with a mass concentration of 3% (dissolved cerium nitrate in water and stirred evenly, and the mass concentration of cerium nitrate is 1%) was added to 250mL of suspension In liquid B, suspension C is obtained;

[0040] Step 3: 10 g of chopped carbon fibers with a diameter of 8-15 μm are added to every 70 mL of water, and 9 g of them have a beating degree of 80. SR bamboo f...

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Abstract

The invention discloses a preparation method of a rare earth-modified paper base friction material. The preparation method comprises the following steps of dissolving a cashew nut shell oil-modified phenolic resin in anhydrous ethanol to obtain a solution A, dispersing multi-walled carbon nanotubes in a sodium dodecyl sulfate aqueous solution to obtain a suspension liquid B, adding a nitrate solution of a rare earth element into the suspension liquid B to obtain a suspension liquid C, dispersing chopped carbon fibers, bamboo fibers and diatomite in water and adding the suspension liquid C into the mixed solution to obtain a solution D, carrying out defibering on the solution D, carrying out sheet-making and drying to obtain a sample sheet, soaking the sample sheet in the solution A, taking out the sample sheet, carrying out drying in air, and carrying out hot press molding to obtain the rare earth-modified paper base friction material. The preparation method realizes full combination of the rare earth element and the carbon nanotubes, utilizes their synergism, realizes preparation of the single-layer paper base friction material, has simple and easily controllable processes, solves the problem that the friction material obtained by the prior art has the uneven surface, unfirmly-bonded interfaces and unstable friction performances, greatly improves friction performances of the rare earth-modified paper base friction material and effectively reduces a wear rate.

Description

technical field [0001] The invention belongs to the field of friction materials, and relates to a preparation method of a modified paper-based friction material, in particular to a preparation method of a rare earth modified paper-based friction material. Background technique [0002] Wet friction materials refer to friction materials that work in lubricating media (mainly lubricating oil), and are mainly used in wet transmission systems such as automatic transmissions, differentials, torque managers and synchronizers [P.Marklund, R.Larsson.Tribology International, 2008, 41:824–830.]. Due to different conditions of use, the speed, pressure and load of the transmission system are very different. It is difficult for a single material to meet the requirements of all working conditions, so a variety of wet friction materials have been developed, mainly including cork rubber-based friction materials and powder metallurgy friction materials. , paper-based friction materials and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/50D21H17/68D21H17/48D21H17/00D21H17/66
Inventor 黄剑锋李文斌杨朝王文静费杰曹丽云
Owner 盐城抱璞文化传媒有限公司
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