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Method for preparing nanoparticle-modified friction material

A nanoparticle modification and friction material technology, which is applied to friction linings, mechanical equipment, etc., can solve the problems of reduced friction performance, weak combination of resins, nanoparticles and reinforcing fibers, and uneven mixing of raw materials, so as to improve thermal fading , Improve heat recovery performance, improve friction performance and service life

Inactive Publication Date: 2010-06-30
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the disadvantages of uneven mixing of raw materials, weak combination of resin, nanoparticles and reinforcing fibers in the current preparation process of friction materials modified by nanoparticles, which leads to a decrease in friction performance, and to provide a method for improving friction performance. Uniform dispersibility of nanoparticles in friction materials, method for improving bonding strength of resin, nanoparticles and reinforcing fibers at the same time

Method used

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  • Method for preparing nanoparticle-modified friction material

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example 1

[0023] Weigh 5 parts of phenolic resin and 0.05 parts of hexamethylenetetramine, dissolve them in the mixed solution of denatured alcohol and xylene, add 0.5 parts of silane coupling agent at the same time, stir well to obtain resin solution; weigh 2 parts of nano-oxidized Put aluminum and 1 part of nano-silica into industrial alcohol, add 0.05 parts of polyethylene glycol at the same time, stir well, pour it into the resin solution, mix and stir evenly; then add 15 parts of aramid fiber and 5 After stirring, add 1.5 parts of molybdenum disulfide, 4 parts of graphite, 16 parts of barite, 5 parts of wollastonite, and 4 parts of tire powder. The above composite materials were mixed and stirred evenly, and then dried in an oven at 90° C. for 24 hours to obtain a friction material.

example 2

[0025] Weigh 10 parts of boron-modified phenolic resin and 0.15 parts of urotropine, dissolve them in the mixed solution of denatured alcohol and acetone, add 0.8 parts of sodium dodecylbenzene sulfonate at the same time, and stir to obtain a resin solution; weigh Put 3 parts of nano-calcium carbonate and 2 parts of nano-silicon carbide into the acetone solution, add 0.1 part of oleic acid at the same time, stir well, pour it into the resin solution, mix and stir evenly; then add 5 parts of steel fiber and 8 parts to the above mixed solution. 3.5 parts of molybdenum disulfide, 7 parts of graphite, 30 parts of barite, 10 parts of wollastonite, and 10 parts of tire powder are added after stirring. The above composite materials were mixed and stirred evenly, and then dried in an oven at 120° C. for 8 hours to obtain a friction material.

example 3

[0027] Weigh 15 parts of melamine-modified phenolic resin, 0.5 part of hexamethylenetetramine and 0.2 part of urotropine, dissolve them in a mixed solution of denatured alcohol and ethyl acetate, add 0.1 part of sodium polyacrylate and 0.2 parts of ten Dialkyl sodium sulfate, stir well to get resin solution; weigh 5 parts of nano wollastonite and 2 parts of nano calcium carbonate into industrial alcohol, add 0.1 part of polyethylene glycol at the same time, stir well and pour into resin solution , mix and stir evenly; then add 10 parts of steel fiber and 20 parts of pitch carbon fiber to the above mixed solution, stir evenly and dry in an oven at 100° C. for 12 hours. Add 5 parts of molybdenum disulfide, 15 parts of graphite, 30 parts of barite, 10 parts of alumina, and 10 parts of tire powder to the above dried composite material, mix and stir evenly to obtain a friction material.

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Abstract

The invention discloses a method for preparing a nanoparticle-modified friction material, which comprises the following steps: dissolving a resin in a solvent to obtain solution of the resin, uniformly dispersing nanoparticles in the solution of the resin, soaking reinforcing fibers in the solution and adding surfactant to allow the resin, the nanoparticles and the reinforcing fibers to be tightly bonded and uniformly disperse; and mixing the resin-coated nanoparticles and the resin-coated reinforcing fibers with a friction performance regulator and a filler, uniformly stirring the mixture and drying the mixture. In the method, the flowability of the solution of the resin is used to coat the nanoparticles and the reinforcing fibers, so the uniform mixing of the nanoparticles, the fibers and the resin is realized; the bonding strength of the nanoparticles, the fibers and the resin is increased under the action of the surfactant; and the friction performance and the service life of a brake pad can be improved on the basis of reducing the dosages of the nanoparticles, the reinforcing fibers and the resin. The friction material of the invention can be widely used in the preparation of brake pads of motor vehicles, brakes of machine tools and electrodes, clutch liners and the like.

Description

technical field [0001] The invention relates to a preparation method of friction materials, in particular to a preparation method of friction materials used for motor vehicle brake pads, machine tool and electrode brakes, clutch linings and the like. Background technique [0002] Friction materials for automobile braking, commonly known as brake pads, are one of the most important safety components in the automobile braking system, and are related to the safety of the life and property of automobile drivers. The preparation of brake pads is generally made of resin, reinforcing fiber, friction performance modifier and filler, etc., which are uniformly mixed, hot-pressed and cured. Traditional brake pads mainly use asbestos fiber as the reinforcement phase. Since asbestos was found to be an important carcinogen, the semi-metallic friction material with metal fiber as the reinforcement phase has been developed rapidly and has been widely used in the manufacture of various vehic...

Claims

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Application Information

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IPC IPC(8): C08J5/14C08L77/10C08L61/06C08L61/14C08K13/04C08K5/3492C08K5/54C08K3/22C08K3/36C08K7/04C08K3/30C08K3/04C08K3/34F16D69/02
Inventor 王焕平徐时清赵士龙邓德刚黄立辉
Owner CHINA JILIANG UNIV
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