Carbon micro-tube epoxy resin wave-absorbing composite material and preparation method thereof

A technology of carbon microtubes and epoxy resin, applied in nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problems of poor strength of composite radar absorbing materials, low elastic modulus of hollow fibers, and cumbersome preparation process, etc., to achieve The effect of good graphitization degree, large lumen and simple preparation process

Inactive Publication Date: 2010-09-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the cumbersome preparation process of the existing active carbon fiber epoxy resin composite radar wave-absorbing material, and the high density of the carbon fiber epoxy resin composite material and the low elastic modulus of the hollow fiber prepared by the spinning method make the composite In order to solve the problem of poor strength of radar absorbing materials, a carbon microtube epoxy resin absorbing composite material and its preparation method are provided

Method used

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  • Carbon micro-tube epoxy resin wave-absorbing composite material and preparation method thereof
  • Carbon micro-tube epoxy resin wave-absorbing composite material and preparation method thereof
  • Carbon micro-tube epoxy resin wave-absorbing composite material and preparation method thereof

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specific Embodiment approach 1

[0009] Specific Embodiment 1: A carbon microtube epoxy resin wave-absorbing composite material in this embodiment is made of 0.1%~1.0% carbon microtube and 99.0%~99.9% epoxy resin glue by mass percentage; Among them, carbon microtubes are made of urea and ethylene glycol at a mass ratio of 50 to 100:1; epoxy resin glue is made of 100 parts of bisphenol A epoxy resin, 5 parts to 10 parts It is composed of acetone and 8-12 parts of diethylenetriamine.

[0010] The carbon microtubes of this embodiment are bamboo-shaped carbon microtubes with a diameter of 0.5 μm to 1 μm and a wall thickness of about 10 nm. The carbon microtubes are synthesized in situ at low temperature, have a good degree of graphitization, and are During the process, the amino group is grafted on the surface of the hollow carbon fiber, which significantly improves the combination with the epoxy resin matrix, and does not require any surface treatment during the preparation of the composite material. The elasti...

specific Embodiment approach 2

[0011] Embodiment 2: The difference between this embodiment and Embodiment 1 is that a carbon microtube epoxy resin wave-absorbing composite material is composed of 0.2%~0.9% carbon microtubes and 99.1%~99.8% carbon microtubes by mass percentage. Made of epoxy glue. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: a carbon microtube epoxy resin wave-absorbing composite material is composed of 0.5% carbon microtubes and 99.5% epoxy resin glue by mass percentage made. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a carbon micro-tube epoxy resin wave-absorbing composite material and a preparation method thereof, and relates to a wave-absorbing composite material and a preparation method thereof. The invention solves the problems that the existing active carbon fiber epoxy resin composite wave-absorbing material has fussy preparation process and large density, the hollow fiber prepared by a spinning method has low elastic modulus and the wave-absorbing material has poor strength. The composite material is prepared from carbon micro-tube and epoxy resin glue. The method comprises the following steps of: preparing the carbon micro-tube by using urea and ethylene glycol; preparing the epoxy resin glue by using bisphenol A epoxy resin, acetone and diethylenetriamine; and adding the carbon micro-tube into the epoxy resin glue, stirring the mixture uniformly, then adding the mixture into a die, and pressing the mixture to obtain the composite material. The elastic modulus of the material is 10 to 20GPa, the density is 1.00 to 1.05g/cm<3>, the lowest reflectivity is -13.25dB, the band width of -10dB reflectivity is 3.1GHz, and the material can be used for hiding weapons and eliminating the harm of electromagnetic wave to the organism.

Description

technical field [0001] The invention relates to a wave-absorbing composite material and a preparation method thereof. Background technique [0002] With the development of stealth technology, radar absorbing materials have become an important branch of stealth technology. The absorbing material is a functional material composed of an absorber and a matrix that can pass through radar waves and can attenuate and absorb electromagnetic waves. Carbon fiber composite materials have ultra-high tensile strength, elastic modulus and Thermal conductivity, low thermal expansion coefficient, excellent anti-ablation and anti-oxidation properties make carbon fiber composites widely used in the aerospace industry. The existing composite radar absorbing materials using activated carbon fibers as absorbents, first of all carbon fiber After being impregnated with a mixed solution of phosphate and sulfate, then carbonized, and finally activated with ammonia gas at high temperature, the obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08K5/17C08K7/00C08K3/04C01B31/02B82B3/00
Inventor 温广武于洪明黄小萧钟博张晓东张涛白宏伟
Owner HARBIN INST OF TECH
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