Method for improving shock resistance of resin-based carbon fiber composite material

A technology of impact resistance and composite materials, applied in the directions of carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problem of reduction, and achieve the effect of improving impact resistance, convenient operation, and convenient large-scale processing

Inactive Publication Date: 2011-02-09
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned methods all have the disadvantages of improving impact resistance and reducing other mechanical properties to varying degrees, such as bending resistance, tensile and compression resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put 1g of carbon nanotubes and 500ml of acetone in a beaker, then place the beaker in ice water for ultrasonic oscillation treatment, the oscillation power is 200 watts, the oscillation time is 2 hours, and ice cubes are added every 20 minutes. Leave for 2 hours. Mix the above-mentioned acetone solution containing carbon nanotubes with 200g of epoxy resin, and perform ultrasonic oscillation while supplemented by mechanical stirring. The oscillation method is the same as before. When the ultrasonic oscillation and stirring are carried out for about 1 hour, the mixture has turned black. Stop stirring and sonication. Put the epoxy resin containing acetone and carbon nanotubes in a vacuum oven at 60°C to remove the acetone solvent, then add 140g of tetrahydrophthalic anhydride as a curing agent and mix well, then use vacuum-assisted resin transfer Molding (VARTM) molding method uses the above-mentioned epoxy resin with curing agent and carbon nanotubes to infiltrate the ca...

Embodiment 2

[0017] Put 3g of carbon nanotubes and 500ml of acetone in a beaker, then place the beaker in ice water for ultrasonic oscillation treatment, the oscillation power is 300 watts, the oscillation time is 2 hours, and ice cubes are added every 20 minutes. Leave for 2 hours. Mix the above-mentioned acetone solution containing carbon nanotubes with 200g of epoxy resin, and perform ultrasonic oscillation while supplemented by mechanical stirring. The oscillation method is the same as before. When the ultrasonic oscillation and stirring are carried out for about 1 hour, the mixture has turned black. Stop stirring and sonication. Put the epoxy resin containing acetone and carbon nanotubes in a vacuum oven at 60°C to remove the acetone solvent, then add 140g of tetrahydrophthalic anhydride as a curing agent and mix well, then use vacuum-assisted resin transfer Molding (VARTM) molding method uses the above-mentioned epoxy resin with curing agent and carbon nanotubes to infiltrate the ca...

Embodiment 3

[0019] Put 2g of carbon nanotubes and 500ml of acetone in a beaker, then place the beaker in ice water for ultrasonic oscillation treatment, the oscillation power is 150 watts, the oscillation time is 2 hours, and ice cubes are added every 20 minutes. Leave for 2 hours. Mix the above-mentioned acetone solution containing carbon nanotubes with 200g of epoxy resin, and perform ultrasonic oscillation while supplemented by mechanical stirring. The oscillation method is the same as before. When the ultrasonic oscillation and stirring are carried out for about 1 hour, the mixture has turned black. Stop stirring and sonication. Put the epoxy resin containing acetone and carbon nanotubes in a vacuum oven at 60°C to remove the acetone solvent, then add 140g of tetrahydrophthalic anhydride as a curing agent and mix well, then use vacuum-assisted resin transfer Molding (VARTM) molding method uses the above-mentioned epoxy resin with curing agent and carbon nanotubes to infiltrate the ca...

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Abstract

The invention relates to a method for improving shock resistance of a resin-based carbon fiber composite material. The method is as follows: a small amount of carbon nanotubes are dispersed in an epoxy resin system, and then the epoxy resin system containing carbon nanotubes is composited with carbon fiber fabric for molding. In the invention, the method for improving shock resistance of the resin-based carbon fiber composite material uses the excellent mechanical properties of carbon nanotubes to prevent resin matrixes from layering and prevent cracks from expanding, and uses carbon nanotubes as reinforcement, thus ensures that the shock resistance of the resin-based carbon fiber composite material can be significantly improved without reducing other mechanical properties. Experiments prove that after the resin-based carbon fiber composite material is processed by the method of the invention, the shock resistance strength of the composite material is increased by 20% or so than that of the composite material not mixed with carbon nanotubes. In addition, the method also has the advantages of convenient operation, easy for large-scale processing and the like.

Description

technical field [0001] The invention belongs to the technical field of resin matrix modification of composite materials, in particular to a method for improving the impact resistance of resin-based carbon fiber composite materials by doping a small amount of carbon nanotubes into epoxy resin. Background technique [0002] With the continuous development of aerospace and modern weaponry, higher requirements are placed on the materials used. For example, when designing the load-bearing components of missiles, artificial satellites, and aircraft, materials with higher specific strength and specific modulus are increasingly required, so lightweight, high-strength advanced resin-based carbon fiber composites occupy more and more in high-tech fields and national defense construction. increasingly important position. This resin-based carbon fiber composite material is usually composed of reinforcing fibers and a resin matrix, and its performance mainly depends on the mechanical pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55D06M11/74D06M13/192D06M101/40
Inventor 徐志伟刘梁森吴晓青焦亚男
Owner TIANJIN POLYTECHNIC UNIV
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