Self-lubricated microcapsule/bismaleimide friction composite material and preparation method thereof

A bismaleimide, composite material technology, applied in the field of polymer-based friction material science, can solve the problem of low friction coefficient wear resistance, poor ionic liquid bearing capacity, and can not really improve the wear resistance of bismaleimide. It can improve the bearing capacity, reduce the loss and improve the tribological performance.

Active Publication Date: 2019-10-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can form an efficient adsorption film and tribochemical reaction on the surface of the friction pair, so it has a low friction coefficient and good wear resistance, but the direct application of ionic liquid to the friction field is not suitable for oil-sensitive materials or oil-free materials. Contaminated operating conditions and poor load carrying capacity of ionic liquids compared to solid lubricating packings
[0006] It can be seen that simply combining graphene (G), ionic liquids (ILs) and bismaleimide cannot really improve the wear resistance of bismaleimide

Method used

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  • Self-lubricated microcapsule/bismaleimide friction composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]Step (1) Add 1 part of graphene oxide and 1 part of polysulfone resin into a 250mL three-necked flask, then add 100 parts of dichloromethane to it for mechanical stirring at a stirring speed of 200r / min, and stir at 25°C to make graphite oxide Alkenes are uniformly dispersed in polysulfone resin.

[0044] Step (2) Add 0.8 parts of polyvinyl alcohol (PVA) and 4 parts of 1-(1-aminoethyl)-3-methylimidazolium bromide ionic liquid, 200 parts of deionized water into a 100mL beaker, at 55 ℃ Stir in a magnetic stirring water bath until homogeneously mixed.

[0045] Step (3) Add the mixed solution in step (2) to the mixed solution in step (1), and quickly evaporate the organic solvent under the conditions of water bath temperature 55°C and stirring speed 400r / min, and wash and pump the product after stirring continuously for 60min. Filter and dry in a vacuum oven at 80°C for more than 4 hours to obtain ionic liquid @graphene oxide / polysulfone resin self-lubricating microcapsules...

Embodiment 2

[0049] Step (1) Add 2 parts of graphene oxide and 2 parts of polyphenylene sulfide resin into a 250mL three-necked flask, then add 200 parts of dichloromethane to it for mechanical stirring at a stirring speed of 200r / min, and stir at 25°C to make Graphene oxide is uniformly dispersed in polyphenylene sulfide resin.

[0050] Step (2) 1.6 parts of sodium dodecylbenzenesulfonate and 3 parts of 1-(1-aminoethyl)-3-methylimidazolium bromide ionic liquid and 3 parts of 1-methyl-3-aminoethyl Add the imidazolium tetrafluoroborate ionic liquid and 300 parts of deionized water into a 100 mL beaker, and stir in a magnetic stirring water bath at 55° C. until the mixture is uniform.

[0051] Step (3) Add the mixed solution in step (2) to the mixed solution in step (1), and quickly evaporate the organic solvent under the conditions of water bath temperature 55°C and stirring speed 400r / min, and wash and pump the product after stirring continuously for 60min. Filter and dry in a vacuum oven...

Embodiment 3

[0055] Step (1) Add 2 parts of graphene oxide and 3 parts of polyetherimide resin into a 250mL three-necked flask, then add 300 parts of dichloromethane to it for mechanical stirring at a stirring speed of 200r / min, and stir at 25°C The graphene oxide is uniformly dispersed in the polyetherimide resin.

[0056] Step (2) Add 2.5 parts of primary alcohol polyoxyethylene ether, 10 parts of 1-methyl-3-aminoethylimidazolium tetrafluoroborate ionic liquid, and 500 parts of deionized water into a 250mL beaker. Stir in a water bath until well combined.

[0057] Step (3) Add the mixed solution in step (2) to the mixed solution in step (1), and quickly evaporate the organic solvent under the conditions of water bath temperature 55°C and stirring speed 400r / min, and wash and pump the product after stirring continuously for 60min. Filter and dry in a vacuum oven at 80°C for more than 4 hours to obtain ionic liquid @graphene oxide / polyetherimide resin self-lubricating microcapsules.

[0...

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Abstract

The invention provides a self-lubricated microcapsule / bismaleimide friction composite material and a preparation method thereof. The preparation method comprises the following steps: (1) by taking anionic liquid as a core material, and a composite material of graphene oxide and a thermoplastic resin as a wall material, preparing an ionic liquid @ graphene oxide / thermoplastic resin self-lubricatedmicrocapsules with a solid-liquid system lubricating filler; (2) mixing and heating the ionic liquid @ graphene oxide / thermoplastic resin, diphenylmethane type bismaleimide and diallyl bisphenol A, completely melting the components, pouring the components into a mold, performing sectional heating curing, and further performing aftertreatment on the components, thereby obtaining an ionic liquid @graphene oxide / thermoplastic resin self-lubricated microcapsule / bismaleimide resin composite material. The material has self lubrication in the friction process, the service life of the material can be prolonged, the application range of the material can be widened, and the material can be used under conditions of oil-sensitive materials and no oil pollution.

Description

technical field [0001] The invention belongs to the technical field of polymer-based friction materials, and relates to a self-lubricating microcapsule / bismaleimide friction composite material and a preparation method thereof. Background technique [0002] Bismaleimide (BMI) resin, as one of the matrices of advanced polymer composite materials, has the characteristics of light weight, high rigidity, high mechanical strength, corrosion resistance, and easy processing of polymer materials. , machinery and other fields have been widely used. However, its disadvantages of high brittleness, high friction coefficient and easy wear lead to great resistance in the application of friction materials. [0003] In order to improve the anti-wear performance of bismaleimide, it is generally necessary to compound some anti-wear materials, such as graphene (G), ionic liquids (ILs), etc. [0004] Graphene (G) as a single layer of carbon atoms through the sp 2 The two-dimensional carbon ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
CPCC09K3/14
Inventor 刘超何寅坤林阳鲍艳殷青
Owner SHAANXI UNIV OF SCI & TECH
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