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Preparation method of high temperature resistance and friction resistance phenolic resin composite material

A technology of phenolic resin and composite materials, applied in the direction of chemical instruments and methods, other chemical processes, etc., can solve the problems of limited high-performance friction materials, high brittleness of phenolic resin, insufficient heat resistance, etc., and achieve wide application prospects, heat resistance Effects of performance improvement and affinity improvement

Inactive Publication Date: 2016-05-18
CHANGZHOU AMANTE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: aiming at the problem that the traditional unmodified phenolic resin has high brittleness, poor toughness, and insufficient heat resistance, which limit the development of high-performance friction materials, and the use of pure phenolic resin as a friction material cannot meet the use requirements , provides a kind of preparation method of high-temperature-resistant and friction-resistant phenolic resin composite material, the present invention firstly prepares phenolic resin solution, then carries out surface modification to zirconium dioxide nanopowder, adds it into phenolic resin solution and reacts, obtains High-temperature and friction-resistant phenolic resin composite materials, the invention uses modified nano-zirconia as a filler to add to the phenolic resin solution, which can improve the affinity with the polymer, so that nano-zirconia can be uniformly added to the polymer In the material matrix, the heat resistance of the modified phenolic resin has been greatly improved, and it has a high and stable friction coefficient. Even if it is affected by rain, snow or hot conditions, the friction coefficient will not decrease, and it has a wide application prospect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First, add 50g of phenol to a 1L three-necked flask, then add 3g of aluminum acid, 100mL of formaldehyde and 150mL of 25% sodium hydroxide as an alkaline catalyst, put the flask into a constant temperature water bath, set the temperature to 90°C, and keep it at this temperature Reflux the reaction for 10 hours, cool to room temperature after the reaction, vacuumize the product in the bottle under 50Pa vacuum degree to remove excess water and free phenol, and obtain the alumina-modified phenolic resin; : 5 mixed with absolute ethanol, after mixing, add hexamethylenetetramine of phenolic resin quality 8%, get phenolic resin solution, keep for subsequent use; Take 5g nanometer powder of zirconium dioxide, put into baking oven, at 80 ℃ After drying for 4 hours, add it to the mass fraction of 60% ethanol solution according to the solid-to-liquid ratio of 1:10, and carry out ultrasonic dispersion for 20 minutes. After stirring, use 15% sodium hydroxide and 30% hydrochloric ac...

example 2

[0021]First, add 60g of phenol to a 1L three-necked flask, then add 5g of aluminum acid, 110mL of formaldehyde and 175mL of 25% sodium hydroxide as an alkaline catalyst, put the flask into a constant temperature water bath, set the temperature to 93°C, and keep it at this temperature Reflux reaction for 11 hours, cool to room temperature after the reaction, vacuumize the product in the bottle under 55Pa vacuum degree to remove excess water and free phenol, and obtain alumina acid-modified phenolic resin; :5 mixed with absolute ethanol, after mixing, add hexamethylenetetramine of phenolic resin quality 9%, get phenolic resin solution, keep for subsequent use; Take by weighing 8g nanometer powder of zirconia, put into baking oven, at 85 ℃ After drying for 4.5 hours, add it to the ethanol solution with a mass fraction of 60% according to the solid-to-liquid ratio of 1:10, and carry out ultrasonic dispersion for 23 minutes. After stirring, use 15% sodium hydroxide and 30% hydrochl...

example 3

[0024] First, add 70g of phenol to a 1L three-necked flask, then add 8g of aluminum acid, 120mL of formaldehyde and 200mL of 25% sodium hydroxide as an alkaline catalyst, put the flask into a constant temperature water bath, set the temperature to 95°C, and keep it at this temperature Reflux reaction for 12 hours, cool to room temperature after the reaction, vacuumize the product in the bottle under 60Pa vacuum degree to remove excess water and free phenol, and obtain alumina acid-modified phenolic resin; : 5 mixed with absolute ethanol, after mixing, add phenolic resin quality 10% hexamethylenetetramine, get phenolic resin solution, keep for subsequent use; Take by weighing 10g zirconia nanopowder, put into oven, at 90 ℃ After drying for 5 hours, add it to a 60% ethanol solution with a solid-to-liquid ratio of 1:10, carry out ultrasonic dispersion for 25 minutes, put the dispersion in a three-necked flask, put it in a water bath, and stir it magnetically at 60°C for 40 minutes...

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Abstract

The invention discloses a preparation method of a high temperature resistance and friction resistance phenolic resin composite material, and belongs to the field of composite materials. The method comprises the steps that a phenolic resin solution is prepared at first, zirconium dioxide nanometer powder is subjected to surface modification and then added into the phenolic resin solution for a reaction, and the high temperature resistance and friction resistance phenolic resin composite material is obtained. The modified nanometer zirconium dioxide is used as filler to be added into the phenolic resin solution, the compatibility between the solution and a polymer can be improved, the nanometer zirconium dioxide can be evenly added into a polymer matrix, the heat resistance of the modified phenolic resin is greatly improved, the high and stable friction coefficient is obtained and will not be lowered even being affected by rain or snow or extremely hot weather, and the application prospect is wide.

Description

technical field [0001] The invention discloses a preparation method of a high-temperature-resistant and friction-resistant phenolic resin composite material, which belongs to the field of composite materials. Background technique [0002] The weak link in the structure of phenolic resin is that the phenolic hydroxyl group and methylene are easily oxidized, and the heat resistance is affected. With the continuous development of industry, especially the working conditions of various vehicles and machinery and the development of aviation, aerospace and other cutting-edge technologies for national defense, new requirements are put forward for high-performance friction materials, such as higher thermal decomposition temperature, good Excellent heat recovery performance, sufficient friction coefficient, good wear resistance and low noise, etc. Using pure phenolic resin as a friction material, such as the base material of luxury cars, motorcycle brake pads and clutch plates, canno...

Claims

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Application Information

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IPC IPC(8): C08L61/14C08K9/06C08K3/22C08G8/28C08G8/10C09K3/14
CPCC08K9/06C08G8/10C08G8/28C08K3/22C08K2003/2244C08K2201/011C08L2201/08C09K3/149
Inventor 陈兴权王志慧
Owner CHANGZHOU AMANTE CHEM CO LTD
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