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Hyperbranched polysiloxane grafted graphene/bismaleimide composite material and preparation method thereof

A technology of bismaleimide and polysiloxane is applied in the field of hyperbranched polysiloxane grafted graphene/bismaleimide composite material and preparation, and can solve the problem of high viscosity and unfavorable graphene dispersion. , high curing temperature, to achieve the effect of improving dispersibility, improving mechanical properties and friction properties, and good mechanical properties

Inactive Publication Date: 2012-11-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its curing temperature is high, and the commonly used 2,2'-diallylphenol modified bismaleimide resin has a high viscosity at room temperature, which is not conducive to the dispersion of graphene.

Method used

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  • Hyperbranched polysiloxane grafted graphene/bismaleimide composite material and preparation method thereof
  • Hyperbranched polysiloxane grafted graphene/bismaleimide composite material and preparation method thereof
  • Hyperbranched polysiloxane grafted graphene/bismaleimide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Add vinyltriethoxysilane-grafted graphene and methylbis(dimethylvinylsiloxy)silane into a three-necked flask at a mass ratio of 1:400, and add 0.1~4%Pt / C The catalyst was reacted at 50° C. for 8 hours under the condition of nitrogen protection, suction filtered, and washed with ethanol to obtain hyperbranched polysiloxane-modified graphene.

[0032] (2) Ultrasonic dispersion of 0.1 parts of hyperbranched polysiloxane-modified graphene, 100 parts of diphenylmethane type bismaleimide and 30 parts of bisphenol A diallyl ether at a power of 50~70W After 10~60min, heat and melt at 60~120℃, prepolymerize for 15~60min, pour into the preheated mold, put it into a vacuum box at 80~120℃, vacuumize to remove air bubbles, and put it into a blast drying oven Carry out staged heating and curing, the curing process is 120°C / 2h+140°C / 2h+160°C / 2h+180°C / 2h, then naturally cool, after demoulding, post-treatment at 200°C for 2 hours to obtain hyperbranched polysilicon Oxane-grafted gr...

Embodiment 2

[0034] (1) The preparation method of hyperbranched polysiloxane-modified graphene is the same as in Example 1.

[0035] (2) Ultrasonic dispersion of 0.5 parts of hyperbranched polysiloxane-modified graphene, 100 parts of diphenylmethane type bismaleimide and 40 parts of bisphenol A diallyl ether at a power of 50~70W After 10~60min, heat and melt at 60~120℃, prepolymerize for 15~60min, pour into the preheated mold, put it into a vacuum box at 80~120℃, vacuumize to remove air bubbles, and put it into a blast drying oven Carry out staged heating and curing, the curing process is 120°C / 2h+140°C / 2h+160°C / 2h+180°C / 2h, then naturally cool, after demoulding, post-treatment at 200°C for 2h to obtain hyperbranched polysilicon Oxane-grafted graphene / bismaleimide composites.

Embodiment 3

[0037] (1) The preparation method of hyperbranched polysiloxane-modified graphene is the same as in Example 1.

[0038](2) Ultrasonic dispersion of 1 part of hyperbranched polysiloxane-modified graphene, 100 parts of diphenylmethane type bismaleimide and 50 parts of bisphenol A bisallyl ether at a power of 50~70W After 10~60min, heat and melt at 60~120℃, prepolymerize for 15~60min, pour into the preheated mold, put it into a vacuum box at 80~120℃, vacuumize to remove air bubbles, and put it into a blast drying oven Carry out staged heating and curing, the curing process is 120°C / 2h+140°C / 2h+160°C / 2h+180°C / 2h, then naturally cool, after demoulding, post-treatment at 200°C for 2 hours to obtain hyperbranched polysilicon Oxane-grafted graphene / bismaleimide composites.

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Abstract

The invention relates to a hyperbranched polysiloxane grafted graphene / bismaleimide composite material and a preparation method thereof. The composite material is prepared by casting for forming and comprises 0.1-10 weight parts of graphene modified by hyperbranched polysiloxane, 100 weight parts of diphenylmethane bismaleimide and 10-100 weight parts of bisphenol A diene propyl ether, wherein for further raising the dispersibility of graphene in resins and the interface bonding strength between the graphene and resins, the graphene is modified by conducting silicon-hydrogen addition polymerization; according to the bisphenol A diene propyl ether included in the resins, the prepolymer has low viscosity in a wide temperature range, thus the dispersibility of graphene in benefited; the bisphenol A diene propyl ether can be rearranged into 2,2'-diallyl bisphenol A at a high temperature to react with the diphenylmethane bismaleimide, thus the strength of the resins is guaranteed. The prepared composite material has good mechanical properties and excellent friction properties, and can be used as slide plates of non-lubricated water pumps or dynamic seal coatings of engines, etc.

Description

technical field [0001] The invention belongs to the scientific and technical field of advanced composite materials, and in particular relates to a hyperbranched polysiloxane grafted graphene / bismaleimide composite material and a preparation method thereof. Background technique [0002] Graphene is a honeycomb-shaped two-dimensional atomic crystal stacked by sp2 hybrid monolayers of carbon atoms. This unique structure not only has high thermal conductivity and carrier mobility, but more importantly, Graphene has a chemical form similar to the outer surface of carbon nanotubes, and its surface structure is more open than that of carbon nanotubes. Its Young's modulus (1TPa) and internal stress (130GPa) are also comparable to those of carbon nanotubes. It has similar application characteristics to carbon nanotubes: such as good toughness and lubricity, and can be used in the preparation of wear-resistant and wear-reducing materials and lubricants. In recent years, the excellent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K9/04C08K9/06C08K3/04C08G73/12
Inventor 颜红侠贾园张梦萌冯逸晨
Owner NORTHWESTERN POLYTECHNICAL UNIV
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