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Boron and linseed oil double-modification phenolic resin-based friction resistance composite material and preparation method thereof

A linseed oil modification and phenolic resin technology, applied in the field of frictional composite materials, can solve the problems of insignificant improvement of the toughness of phenolic resin, difficulty in stabilizing the performance of modified phenolic resin, poor high temperature performance of phenolic resin, etc. Benefit advantages, good thermal recession resistance, excellent heat resistance and friction and wear properties

Inactive Publication Date: 2010-08-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0039] In summary, the methods of toughening and modifying phenolic resins reported in the literature include two methods: internal toughening and external toughening. Tung oil and cashew nut shell oil are commonly used for internal toughening, but these two raw materials need to be cumbersome before use. Purification treatment process, the obtained modified phenolic resin performance is difficult to stabilize
The external toughening is mainly modified by rubber and thermoplastic resin, but the modified phenolic resin obtained by these two methods has poor high-temperature performance, and its use as a friction composite material matrix is ​​greatly limited.
There are relatively many methods for heat-resistant modification of phenolic resins, mainly including amine modification, boron modification, molybdenum modification, and benzoxazine compound modification. However, these modification methods improve the heat resistance of the resin at the same time , the effect of improving the toughness of phenolic resin is not obvious
Double modification of phenolic resin with tung oil and boron can increase toughness and improve heat resistance, which provides a new idea for the modification of phenolic resin, but the cumbersome purification process of tung oil limits the application of this method

Method used

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  • Boron and linseed oil double-modification phenolic resin-based friction resistance composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Take homemade linseed oil modified phenolic resin 3.58g, boron modified phenolic resin 9.22g, 200 mesh chopped glass fiber 6.40g, nitrile rubber 5.12g, silicon dioxide 1.92g, silicon carbide 2.56g, molybdenum disulfide 1.92g g, copper powder 1.28g and mix well. Add each component into the mold under the pressure of 28MPa and 170°C, hold the pressure for 28 minutes, and then demould after the mold is naturally cooled to room temperature. The samples were polished, and finally heat-treated at 175°C for 6 hours to obtain boron and linseed oil double-modified phenolic resin-based friction composite materials.

Embodiment 2

[0054] Take homemade linseed oil modified phenolic resin 3.65g, boron modified phenolic resin 8.51g, 200 mesh chopped glass fiber 7.04g, nitrile rubber 5.76g, silicon dioxide 1.28g, silicon carbide 2.56g, molybdenum disulfide 1.92 g, copper powder 1.28g and mix well. Add each component into the mold under the pressure of 30MPa and 175°C, hold the pressure for 30 minutes, and then demould after the mold is naturally cooled to room temperature. The samples were polished, and finally heat-treated at 180°C for 7 hours to obtain boron and linseed oil double-modified phenolic resin-based friction composite materials.

Embodiment 3

[0056] Take homemade linseed oil modified phenolic resin 3.69g, boron modified phenolic resin 7.83g, 200 mesh chopped glass fiber 7.68g, nitrile rubber 5.44g, silicon dioxide 1.60g, silicon carbide 2.88g, molybdenum disulfide 1.60 g, copper powder 1.28g and mix well. Add each component into the mold under the pressure of 32MPa and 180°C, hold the pressure for 32 minutes, wait for the mold to cool naturally to room temperature, and then demould. The samples were polished, and finally heat-treated at 185°C for 8 hours to obtain boron and linseed oil double-modified phenolic resin-based friction composite materials.

[0057] Mix linseed oil-modified phenolic resin with a mass fraction of 30% and boron-modified phenolic resin with 70% to prepare sample 1 with an impact strength of 3.135KJ m -2 , higher than the impact strength of pure boron modified phenolic resin (sample 2) and pure linseed oil modified phenolic resin (sample 3) (respectively 0.633KJ m -2 and 2.527KJ·m -2 ); t...

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Abstract

The invention provides a boron and linseed oil double-modification phenolic resin-based friction resistance composite material and a preparation method thereof, and relates to the field of friction resistance composite materials. According to the preparation method, the phenolic resin is toughened and modified by using the linseed oil which has a rich source. The method for preparing the phenolic resin-based friction resistance composite material comprises the following steps: mixing boron modified phenolic resin prepolymer with relatively mature production process technology and self-made linseed oil modified phenolic resin prepolymer; adding a reinforcement material such as glass fiber and other components into the mixture; forming the boron and linseed oil double-modification phenolic resin by heating; and performing binary modification of toughness and heat resistance on the boron and linseed oil double-modification phenolic resin to obtain a phenolic resin-based friction resistance composite material. Compared with a tung oil and cashew nut shell oil toughened and modified phenolic resin-based friction resistance composite material, the boron and linseed oil double-modification phenolic resin-based friction resistance composite material has the advantages of rich material resource, comparatively simple purification process, and stable performance of the obtained products. Compared with a rubber and thermoplastic resin toughened and modified phenolic resin-based friction resistance composite material, the boron and linseed oil double-modification phenolic resin-based friction resistance composite material has the advantages of high heat resistance and friction-wear performance of the products, and no off-odor generated during the use of the friction resistance material.

Description

technical field [0001] The invention relates to the field of friction composite materials, in particular to a method for preparing a boron and linseed oil double-modified phenolic resin-based friction composite material, which is widely used in clutches and brakes of automobiles, trains and other vehicles and engineering machinery Brake pads for medium brakes can be used as electromagnet filling materials in trailer electromagnetic brakes to provide friction factors. Background technique [0002] Phenolic resin has good heat resistance and mechanical properties, easy to obtain raw materials, cheap price, simple process and production equipment, and has always been the most important matrix of friction materials. However, unmodified phenolic resins have defects such as high brittleness and poor toughness; in addition, ordinary phenolic resins can be used stably for a long time below 200 °C, and oxidation will obviously occur if the temperature exceeds 200 °C. Therefore, more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08L9/02C08K13/04C08K7/14C08K3/36C08K3/34C08K3/30C08K3/08C08G8/32C09K3/14
Inventor 袁新华程晓农陈敏汪建敏曹顺生宋浩杰
Owner JIANGSU UNIV
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