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High-modulus carbon fiber/high-rigidity polyimide composite material and preparation method thereof

A technology of polyimide and composite materials, which is applied in the field of high-modulus carbon fiber/high-stiffness polyimide composite materials and its preparation, can solve the problems of low modulus of composite materials, achieve high temperature resistance level, and simple preparation method Effect

Pending Publication Date: 2021-10-15
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

High-strength carbon fiber-reinforced polyimide resin-based composite materials are currently the most widely used polyimide composite materials, such as T300, T700, and T800, but their tensile modulus is lower than 300GPa, resulting in composite materials prepared from them lower modulus

Method used

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  • High-modulus carbon fiber/high-rigidity polyimide composite material and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0031] A high-modulus carbon fiber / high-stiffness polyimide prepreg and its composite material:

[0032] The high-modulus carbon fiber is selected from Toray's M40J, the polyimide resin is selected from NPI-550 polyimide, and the inorganic nanoparticles are selected from nano-silica with an average particle size of 20nm. The size of the test plate is 320 (mm) × 320 ( mm) thickness is 1 or 2mm.

[0033] The first step is to prepare high modulus carbon fiber / high stiffness polyimide prepreg:

[0034] A1.1. Add the mixed solvent (7kg) of DMAC and dioxane into a 50L reactor with mechanical stirring, and add 2kg of NPI-550 polyimide powder into the reactor in 3 batches for mechanical Stir and dissolve until homogeneous and transparent, and the mass ratio of DMAC to dioxane is 5:5.

[0035] A1.2. Put 1.16kg of mixed solvent of DMAC and dioxane (the mass ratio of DMAC and dioxane is 5:5) into the ultrasonic grinding barrel, and then add 40g of nano Silica particles were subjected ...

Embodiment 2

[0042] A high-modulus carbon fiber / high-stiffness polyimide prepreg and its composite material:

[0043] The high modulus carbon fiber is selected from Toray's M55J, the polyimide resin is selected from KH450 polyamic acid salt solution, the inorganic nanoparticles are selected from titanium dioxide with a nanometer particle size of 5-10nm, and the size of the test plate is 320 (mm) × 320 (mm) The thickness is 1 or 2mm.

[0044] The first step is to prepare high modulus carbon fiber / high stiffness polyimide prepreg:

[0045]A1.1. Pour 10kg of KH450 polyamic acid salt solution with a refrigerated mass fraction of 50% into a 50L reaction kettle with a mechanical stirring device, and wait until the temperature of the solution reaches 0°C.

[0046] A1.2. Put 2kg of ethanol into the ultrasonic pulverization bucket, and then add 500g of nano-titanium dioxide with a particle size of 5-10nm for 20 minutes of ultrasonic cell pulverization. After the ultrasonic pulverization stops, wi...

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Abstract

The invention provides a high-modulus carbon fiber / high-rigidity polyimide composite material and a preparation method thereof. The composite material comprises a reinforcement body and a resin matrix, the reinforcement body is high-modulus carbon fibers, and the resin matrix is high-rigidity polyimide obtained by inorganic nanoparticle reinforced polyimide, wherein the tensile modulus of the high-modulus carbon fibers is preferably greater than 350 GPa. The preparation method comprises the steps: firstly, preparing a high-modulus carbon fiber / high-rigidity polyimide prepreg, and then carrying out laying, curing and demolding to obtain the high-modulus carbon fiber / high-rigidity polyimide composite material. The high-temperature-resistant polyimide resin, the inorganic nanoparticles and the high-modulus carbon fibers are selected to form nano-micron hybrid polyimide, and the composite material with high modulus and high-temperature resistance is obtained.

Description

technical field [0001] The invention relates to a high-modulus carbon fiber / high-rigidity polyimide composite material and a preparation method thereof, belonging to the technical field of structural composite material manufacturing. Background technique [0002] Due to its outstanding heat resistance, good mechanical properties and excellent dielectric properties, polyimide is often used as a matrix resin for carbon fiber resin-based composite materials in aerospace and automotive fields. High-strength carbon fiber-reinforced polyimide resin-based composite materials are currently the most widely used polyimide composite materials, such as T300, T700, and T800, but their tensile modulus is lower than 300GPa, resulting in composite materials prepared from them Modulus is lower. [0003] In recent years, with the rapid development of aerospace technology, the demand for high-modulus materials is increasing, such as the main load-bearing tube of satellites, solar wing substra...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K7/06C08K3/36C08K3/22C08J5/04C08J5/24
CPCC08J5/005C08J5/042C08J5/24C08J2379/08C08K7/06C08K3/36C08K2003/2241C08K2201/011
Inventor 许晓洲柯红军汪东尹先鹏李娜夏骏李丽英王国勇张昊
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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