Carbon fiber composite material for high-temperature environment and preparation thereof

A composite material and carbon fiber technology, which is applied in the field of reinforced heat-resistant carbon fiber composite materials and its preparation, can solve problems such as poor thermal conductivity, low heat distortion temperature, and insufficient thermal conductivity

Pending Publication Date: 2021-02-26
NANJING XIAOZHUANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are a variety of carbon fiber reinforced composite materials with a service temperature around 200°C or even higher, which have outstanding thermal properties, but due to the high content of carbon fibers, the interfacial bonding between the resin and carbon fibers is poor; adversely affected
In addit

Method used

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  • Carbon fiber composite material for high-temperature environment and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0097] Preparation of multi-component composite thermally conductive fillers with resin-coated thermally conductive components

[0098] 100g graphene nanosheets (thickness 2-3nm, average diameter 8-10μm), 50g spherical boron nitride (average particle size 10μm), 30g alumina particles (average particle size 15μm), 420g vinyl epoxy resin and 32g Diethylenetriamine, 18g hexamethylenetetramine mixed curing agent, stir and mix evenly, then centrifuge the mixture at 3000rpm for 10 minutes, pour off the upper liquid in the centrifuge tube, put the precipitate in an oven and preheat at 60°C for 1.5h , cured at 120°C for 2 hours, pulverized and granulated after complete curing, and the particle size was controlled within 100 μm to obtain a multi-component composite thermally conductive filler with resin-coated thermally conductive components; the thermal conductivity of the sample was 12.4W / mK (tested by steady-state heat flow method) .

preparation example 2

[0100] Preparation of Toughened Resin Composite

[0101] 1) Mix 100 parts by weight of bismaleimide resin and 20 parts by weight of polyethersulfone resin (hydroxyl-terminated reactive polyethersulfone PESU), heat to 158-160 ° C, stir and mix until the resin is completely dissolved, and then Cool down to 100-110°C in a vacuum oven, pour into a mold at 120°C after vacuum defoaming treatment, then perform curing treatment, and finally cool naturally to room temperature to obtain a toughened resin matrix; among them, the curing process is: first at 130°C Incubate for 1h; then maintain at 160°C for 1h; finally maintain at 200°C for 4h.

[0102] 2) Grind the toughening resin matrix raw material in a mixer and mix it with 20 parts by weight of auxiliary toughening agent maleic anhydride grafted EPDM, and melt the mixture in a screw extruder at 270-280°C. After cooling, pelletizing, drying and other post-treatments, the toughened resin composite can be obtained.

preparation example 3

[0104] Preparation of the first composite resin composition

[0105] 1) Weigh the materials according to the following proportions by weight: 60 parts of polybutylene adipamide resin, 18 parts of polyetherimide resin (PEI), 5 parts of polybismaleimide, 12 parts of toughened resin Composite, 10 parts of composite thermally conductive filler, wherein the resin raw material is pre-dried at 110-120°C for 4 hours;

[0106] 2) Put the above materials, 0.5 parts by weight of silicone lubricant, and 0.5 parts of calcium silicate into a high-speed mixer, and stir for 5-10 minutes to obtain a premix;

[0107] 3) After mixing, feed the above-mentioned premixed material from the main feeding port of the twin-screw extruder, and feed 15 parts by weight of chopped carbon fibers (5-10 microns in diameter and 0.2-0.3 mm in length) from the side feeding port added, blended for 45 seconds, melted and extruded, cooled, pelletized and dried to obtain the first composite resin composition.

[0108...

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Abstract

The invention relates to an enhanced heat-resistant carbon fiber composite material and a product thereof. The enhanced heat-resistant carbon fiber composite material is prepared from the following raw materials: a composite resin base material prepared from a first composite resin composition, a second composite resin composition and an auxiliary agent 1; and a graphene nanosheet selected from nitride particles of silicon nitride or boron nitride; and a corresponding auxiliary agent 2. The carbon fiber composite material prepared by the preparation method of the invention not only has excellent mechanical properties, but also has the advantages of excellent heat resistance, heat insulation, processing formability and the like, and is particularly suitable for manufacturing heat insulationdevices in a high-temperature heat radiation environment.

Description

technical field [0001] The invention relates to a reinforced heat-resistant carbon fiber composite material and a preparation method thereof, in particular to a reinforced carbon fiber composite material with high heat resistance for high temperature environments and a preparation method thereof. Background technique [0002] In modern industry, the heat resistance and heat dissipation of resin materials have become common problems in many industries. Composite materials suitable for high-temperature environments (over 100°C) are increasingly valued by modern industries. For example, in the automobile industry, the exhaust pipe cover is an effective barrier to prevent the emitted high temperature from radiating to adjacent components. In the prior art, the exhaust pipe cover is usually made of metal such as stainless steel; however, the metal material has defects such as bulkiness and poor heat insulation. In terms of the exposed exhaust pipe of the motorcycle exhaust pipe,...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L79/08C08L83/04C08L61/16C08L81/02C08L79/04C08K13/06C08K3/04C08K7/18C08K7/00C08K3/22C08K7/06C08K3/34B32B27/28B32B27/20B32B27/08B32B9/00B32B9/04
CPCC08L77/06B32B27/281B32B27/20B32B27/08B32B27/12B32B5/02C08K2003/2227C08L2205/035C08L2201/02B32B2307/306B32B2307/304B32B2307/50B32B2262/106B32B2260/021B32B2260/046B32B2270/00C08L79/08C08L79/085C08L83/04C08L61/16C08L81/02C08L79/04C08K13/06C08K3/042C08K7/18C08K7/00C08K3/22C08K7/06C08K3/34
Inventor 张辉于姗姗张敦谱段海宝
Owner NANJING XIAOZHUANG UNIV
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