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High-thermal conductivity insulated carbon filler, high-thermal conductivity insulated epoxy resin composite material and preparation method thereof

A carbon-based filler and epoxy resin technology, applied in the field of functional materials, can solve problems such as the influence of material insulation, and achieve the effects of easy uniform dispersion, excellent thermal conductivity, high thermal conductivity and high insulation

Inactive Publication Date: 2015-04-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the good conductivity of acetylene carbon black, it will have a significant impact on the insulation of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix 75 parts of isopropanol and 2 parts of deionized water to prepare a mixed solution, then add 15 parts of graphene and 0.4 parts of cetyltrimethylammonium chloride into the mixed solution, and stir rapidly with a stirrer to form a suspension Then add 7 parts of ethyl orthosilicate to the above suspension, add a certain amount of dilute hydrochloric acid to adjust the pH value of the mixture to 4-5, continue stirring for 1 hour to fully hydrolyze the ethyl orthosilicate, and finally Then add ammonia water to adjust the pH value of the mixed solution to 6-7, and react for 1 hour to condense the tetraethyl orthosilicate. The obtained surface insulating modified graphene was separated by filtration, and dried at 90° C. for 8 hours to obtain thermally conductive and insulating graphene. The resulting heat-conducting and insulating graphene uses an insulation tester to measure a resistivity of 2.6×10 10 Ω.cm.

[0030] The high thermal conductivity and insulation epoxy re...

Embodiment 2

[0032] Mix 80 parts of isopropanol and 4 parts of deionized water to prepare a mixed solution, then add 25 parts of flake graphite powder and 0.4 part of stearyl trimethyl ammonium bromide into the mixed solution, and use a stirrer to stir rapidly to form a suspension Then add 7 parts of methyl orthosilicate to the above suspension, add a certain amount of dilute hydrochloric acid to adjust the pH value of the mixture to 4-5, continue stirring for 1 hour to fully hydrolyze the methyl orthosilicate, and finally Then add ammonia water to adjust the pH value of the mixture to 6-7, and react for 1 hour to condense the methyl orthosilicate. The obtained surface insulation modified flake graphite powder is filtered and separated, and dried at 90° C. for 8 hours to obtain thermally conductive and insulating flake graphite powder. The obtained heat-conducting and insulating flake graphite powder is measured by an insulation tester with a resistivity of 7.8×10 9 Ω.cm.

[0033]The hig...

Embodiment 3

[0035] Mix 65 parts of ethanol and 2 parts of deionized water to prepare a mixed solution, then add 20 parts of carbon fiber powder and 0.2 parts of cetyltrimethylammonium chloride into the mixed solution, and stir quickly with a stirrer to form a suspension , and then add 5 parts of butyl orthotitanate to the above suspension, add a certain amount of dilute hydrochloric acid to adjust the pH value of the mixture to 4-5, continue stirring for 1 hour to fully hydrolyze the butyl orthotitanate, and finally Add ammonia water to adjust the pH value of the mixture to 6-7, and react for 1 hour to condense the butyl orthotitanate. The obtained surface insulating modified carbon fiber powder is filtered and separated, and dried at 90° C. for 8 hours to obtain thermally conductive and insulating carbon fiber powder. The resulting heat-conducting and insulating carbon fiber powder was measured by an insulation tester with a resistivity of 4.1×10 9 Ω.cm.

[0036] The high thermal condu...

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PUM

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Abstract

The invention discloses a high-thermal conductivity insulated carbon filler, a high-thermal conductivity insulated epoxy resin composite material and a preparation method thereof. The high-thermal conductivity insulated carbon filler is prepared from carbon material powder, an insulating modifier, a surfactant, an organic solvent, water and a pH regulator by virtue of a sol-gel method. The high-thermal conductivity insulated epoxy resin composite material is prepared by the following steps: further uniformly mixing the prepared high-thermal conductivity insulated carbon filler with an epoxy resin and a curing agent, performing hot press molding, and curing, thereby obtaining the composite material. The prepared carbon filler is high in thermal conductivity, high in insulating property and high in dispersity, the epoxy resin composite material with high insulating property and high thermal conductivity can be prepared, and the performance requirements of the conventional electronic products on the heat-conducting insulated plastics can be met. In addition, the carbon filler and the epoxy resin composite material are simple in preparation method, low in cost, safe and environment-friendly, and the industrial production requirements are met.

Description

technical field [0001] The invention relates to a carbon-based filler with high thermal conductivity and insulation, an epoxy resin composite material with high thermal conductivity and insulation and a preparation method thereof, belonging to the field of functional materials. Background technique [0002] In recent years, with the rapid development of miniaturization and multi-functionalization of electronic equipment, higher and higher requirements have been put forward for the thermal conductivity of materials. As an important thermal management material, thermally conductive insulating materials are widely used in electronic packaging, thermally conductive potting and other fields. In the research of thermal conductive composite materials, improving thermal conductivity is the key. Good thermal conductivity can ensure the normal operation of various electronic components, and improving the thermal conductivity of composite materials can make materials have better applic...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K9/06C08K9/04C08K3/04C08K7/06
Inventor 李伟
Owner HUNAN UNIV
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