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Carbon nanotube/benzoxazine/bimaleimide composite material and preparation method thereof

A technology of bismaleimide and carbon nanotubes, applied in the field of carbon nanotube/benzoxazine/bismaleimide composite materials and their preparation, to achieve good mechanical properties, improve mechanical properties and friction properties , Enhance the effect of interface bonding strength

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, benzoxazine resin, like other thermosetting resins, also has the defect of brittleness, so it needs to be toughened and modified

Method used

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  • Carbon nanotube/benzoxazine/bimaleimide composite material and preparation method thereof
  • Carbon nanotube/benzoxazine/bimaleimide composite material and preparation method thereof
  • Carbon nanotube/benzoxazine/bimaleimide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 0.1~10 parts of carbon nanotubes to 1~100 parts of KH-560 tetrahydrofuran solution, ultrasonically disperse for 0.5h, add dropwise 1~50mL of HCl aqueous solution with a concentration of 1mol / L, and then in 50~80 After stirring for 4-7 hours at ℃, hyperbranched polysiloxane-modified carbon nanotubes were obtained;

[0035] (2) Mix 100 parts of benzoxazine resin and 5 parts of bismaleimide resin prepolymer, and after melting completely at 120-160°C, add 0.1 part of hyperbranched polysiloxane-modified carbon nanotubes , pre-polymerized for 15~60min, then poured into a preheated mold, put it into a vacuum box at 150°C, vacuumed to remove air bubbles, took out the mold, put it into a blast drying oven for stage-by-stage temperature curing, and the curing process is 150°C / 2h, 170°C / 2h, 180°C / 4h, then natural cooling, demoulding, and post-treatment at 200°C for 2h to obtain carbon nanotube / benzoxazine / bismaleimide composite material.

Embodiment 2

[0037] (1) The preparation method of hyperbranched polysiloxane modified carbon nanotubes is the same as that of Example 1;

[0038] (2) Mix 100 parts of benzoxazine resin and 10 parts of bismaleimide resin prepolymer, and after melting completely at 120-160°C, add 1 part of hyperbranched polysiloxane-modified carbon nanotubes, Pre-polymerize for 15~60 minutes, then pour it into a preheated mold, put it into a vacuum box at 150°C, vacuumize to remove air bubbles, take out the mold, put it into a blast drying oven for stage-by-stage heating and curing, and the curing process is 150°C / 2h , 170°C / 2h, 180°C / 4h, then naturally cooled, after demoulding, and post-treatment at 200°C for 2h to obtain the carbon nanotube / benzoxazine / bismaleimide composite material.

Embodiment 3

[0040] (1) The preparation method of hyperbranched polysiloxane modified carbon nanotubes is the same as that of Example 1;

[0041](2) Mix 100 parts of benzoxazine resin and 15 parts of bismaleimide resin prepolymer, and after melting completely at 120-160°C, add 2 parts of hyperbranched polysiloxane-modified carbon nanotubes, Pre-polymerize for 15~60 minutes, then pour it into a preheated mold, put it into a vacuum box at 150°C, vacuumize to remove air bubbles, take out the mold, put it into a blast drying oven for stage-by-stage heating and curing, and the curing process is 150°C / 2h , 170°C / 2h, 180°C / 4h, then naturally cooled, after demoulding, and post-treatment at 200°C for 2h to obtain the carbon nanotube / benzoxazine / bismaleimide composite material.

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Abstract

The invention relates to a carbon nanotube / benzoxazine / bimaleimide composite material and a preparation method thereof. By using carbon nanotube modified by hyper-branched polysiloxane as a reinforcing material and using benzoxazine modified by bimaleimide performed polymer as a matrix, a high temperature-resisting super wear-resisting self-lubricating composite material is prepared by cast molding. For raising the dispersibility of carbon nanotube in resin and the interface bonding intensity of carbon nanotube with resin, the hyper-branched polysiloxane is adopted for modifying carbon nanotube, and an active function group epoxide group which can be chemically reacted with resin is introduced into the surface. The benzoxazine modified by bimaleimide performed polymer used herein contains bisphenol A diallyl ether as an active diluent, has low viscosity, and is beneficial for dispersing graphene. Accordingly, the prepared composite material has good mechanical properties and excellent friction performance, and can be used as a slide plate of a compressor or a dynamic seal coating of an engine, etc.

Description

technical field [0001] The invention belongs to the scientific and technical field of advanced composite materials, and in particular relates to a carbon nanotube / benzoxazine / bismaleimide composite material and a preparation method thereof. Background technique [0002] As a new type of nanomaterial, carbon nanotubes are self-assembled single-molecule systems. Their theoretical Young's modulus is 1.8TPa, their bending strength is 14.2GPa, their tensile strength is 100 times that of steel, and their density is only 1 times that of steel. / 6, so it is considered to be an ideal ultimate reinforcement material for super-strong composites. At the same time, the structure of carbon nanotubes is a hollow cylinder surrounded by concentric graphite surfaces, which has excellent self-lubricating properties. As a reinforcement of composite materials and an additive for lubricating, anti-friction, and wear-resistant materials, carbon nanotubes have huge applications. prospect. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08L79/08C08K9/06C08K7/00C08K3/04C08G73/12C08G73/06
Inventor 颜红侠马雷昝广涛贾园
Owner NORTHWESTERN POLYTECHNICAL UNIV
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