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Resistivity wide-distributed conductive composite material and preparation method thereof

A conductive composite material and composite material technology, applied in the field of conductive composite materials with wide distribution of resistivity and its preparation, can solve the problems that it is difficult to achieve the effect, the chopped carbon fibers cannot be completely dispersed, and the conductive network cannot be overlapped with each other. Good heat resistance and corrosion resistance effect

Inactive Publication Date: 2018-08-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chopped carbon fibers cannot be completely dispersed in the matrix, and cannot overlap each other to form a conductive network, so it is difficult to achieve the desired effect

Method used

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  • Resistivity wide-distributed conductive composite material and preparation method thereof
  • Resistivity wide-distributed conductive composite material and preparation method thereof
  • Resistivity wide-distributed conductive composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dry the chopped fibers to be used in the experiment to a constant weight, weigh 170 g of chopped glass fibers with a length of 6 mm, and weigh 30 g of chopped carbon fibers with a length of 6 mm. Add an appropriate amount of water into the beater, start the equipment, add the weighed chopped glass fiber into it, and circulate and disperse for 15 minutes. After 15 minutes, add the weighed chopped carbon fiber and continue to disperse for 7 minutes. After the dispersion is completed, turn off the beater. Transfer the mixture of water and miscellaneous fibers to the suction filtration equipment, and suction filter off most of the water. The obtained hybrid fibers were manually torn into small pieces, and put into a 120°C oven to dry until the weight did not change. Weigh 116.5g vinyl ester resin, add 2.33g methyl ethyl ketone peroxide (initiator) and 1.17g cobalt naphthenate (promoter) to it, and make it mix homogeneously; Add the hybrid fiber prepared before in the resin...

Embodiment 2

[0034]Dry the chopped fibers to be used in the experiment to a constant weight, weigh 180 g of chopped glass fibers with a length of 6 mm, and weigh 20 g of chopped carbon fibers with a length of 6 mm. Add an appropriate amount of water into the beater, start the equipment, add the weighed chopped glass fiber into it, and circulate and disperse for 15 minutes. After 15 minutes, add the weighed chopped carbon fiber and continue to disperse for 7 minutes. After the dispersion is completed, turn off the beater. Transfer the mixture of water and miscellaneous fibers to the suction filtration equipment, and suction filter off most of the water. The obtained hybrid fibers were manually torn into small pieces, and put into a 120°C oven to dry until the weight did not change. Weigh 116.5g vinyl ester resin, add 2.33g methyl ethyl ketone peroxide (initiator) and 1.17g cobalt naphthenate (accelerator) to it, and make it mix homogeneously; Then add the hybrid fiber prepared before in th...

Embodiment 3

[0036] The chopped fibers to be used in the experiment were dried to a constant weight, and 188 g of chopped glass fibers with a length of 6 mm were weighed, and 12 g of chopped carbon fibers with a length of 6 mm were weighed. Add an appropriate amount of water into the beater, start the equipment, add the weighed chopped glass fiber into it, and circulate and disperse for 15 minutes. After 15 minutes, add the weighed chopped carbon fiber and continue to disperse for 7 minutes. After the dispersion is completed, turn off the beater. Transfer the mixture of water and miscellaneous fibers to the suction filtration equipment, and suction filter off most of the water. The obtained hybrid fibers were manually torn into small pieces, and put into a 120°C oven to dry until the weight did not change. Weigh 116.5g vinyl ester resin, add 2.33g methyl ethyl ketone peroxide (initiator) and 1.17g cobalt naphthenate (accelerator) to it, and make it mix homogeneously; Then add the hybrid f...

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Abstract

The invention discloses a resistivity wide-distributed conductive composite material and a preparation method thereof. The material is composed of chopped carbon fiber, chopped glass fiber and a thermosetting resin matrix by compounding, and the volume resistivity of the material is 0.1-10000 ohm cm. The preparation method includes the step of pre-adjusting the ratio of the chopped carbon fiber tothe chopped glass fiber, the length of the chopped carbon fiber and the content of the resin matrix in the composite material to achieve wide distribution of the volume resistivity of the composite material, and specifically includes the steps of fiber proportion weighing, fiber dispersion and mixing, and hybrid fiber and thermosetting resin compound molding. The method is especially suitable forproduction of large-batch conductive composite products with complex structural shapes, and the provided material can be widely used for preparing electromagnetic shielding materials, wave absorbingmaterials, electrothermal materials, electromagnetic radiator materials and the like.

Description

technical field [0001] The invention relates to the field of functional composite materials, in particular to a conductive composite material with wide distribution of resistivity and a preparation method thereof. It has the advantages of wide distribution range of volume resistivity, light weight and high strength, heat resistance and corrosion resistance, easy molding, and good processing performance. It can be used in electromagnetic shielding materials, wave-absorbing materials, electric heating materials, electromagnetic radiators, etc. Background technique [0002] Generally, the volume resistivity of conductive materials is fixed and will not change in a wide range. For example, metal materials, conductive polymer materials, carbon materials, and semiconductor materials. Moreover, there are obvious deficiencies in general conductive materials, for example, metal materials are not corrosion-resistant and have high density; conductive polymer materials have poor mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/10C08L63/00C08L79/04C08K7/14C08K7/06
CPCC08K7/06C08K7/14C08K2201/001C08K2201/004C08L63/10C08L63/00C08L79/04
Inventor 段华军汪鑫王钧杨小利
Owner WUHAN UNIV OF TECH
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