PA6-based thermal conductive composite material and preparation method thereof

A technology of thermally conductive composite material and thermally conductive filler, which is applied in the field of PA6-based thermally conductive composite material and its preparation, can solve the problems of poor mechanical properties of composite materials, difficult processing and molding, increased preparation cost, etc., and achieves good crystalline properties, thermal conductivity and mechanical properties. Excellent performance and high thermal conductivity

Inactive Publication Date: 2019-03-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the heat-conducting polymer composite materials prepared mainly increase the thermal conductivity by increasing the filling amount of the filler, but the mechanical properties of the prepared composite materials are poor, the processing and molding are difficult, and the preparation cost is increased.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the PA6-based heat-conducting composite material of this embodiment, the heat-conducting composite material is made of the following raw materials in parts by weight: the raw materials are dried in a vacuum oven and weighed in percentage by weight: PA6 / 350 g, HDPE / 150 g, oxidized Aluminum / 150 g, Aluminum Nitride / 300 g, Carbon Fiber / 25 g, Maleic Anhydride Compatibilizer / 25 g.

[0023] The PA6-based thermally conductive composite material of this embodiment is prepared by the following steps:

[0024] 1) Put the carbon fiber in a muffle furnace for calcination at 400°C for 8-12 hours, then soak it in acetone solution for 4-8 hours, filter, wash with deionized water several times, and place it in a vacuum drying oven at 80-100°C Dry in medium vacuum for 8-24 h, reflux concentrated nitric acid to oxidize the carbon fiber for 2-6 h, filter, wash with deionized water until the pH is equal to 7, dry in a vacuum oven at 80-100°C for 8-24 h, and oxidize the carbon fiber with ...

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Abstract

The invention provides a PA6-based thermal conductive composite material and a preparation method thereof. High-flowability PA6, HDPE (high-density polyethylene), surface treated thermal conductive fillers and maleic anhydride bulking agents are uniformly premixed and added from a main feeding port of a double-screw extruder, carbon fibers are added from a glass fiber port, extruded and granulatedto obtain the PA6-based thermal conductive composite material. The composite material prepared by the preparation method has high thermal conductivity, high thermal diffusion coefficient, good mechanical performances and excellent comprehensive performances, is easy to form and can be widely applied to the field of thermal conductive materials such as thermal conductive plastic pipelines, automobile parts, LED (light-emitting diode) lamp cooling devices and the like, and the parts can be prepared by an injection molding process.

Description

technical field [0001] The invention relates to a PA6-based heat-conducting composite material and a preparation method thereof. Background technique [0002] In recent years, heat-conducting materials continue to pursue miniaturization, light weight, corrosion resistance, and high-temperature resistance. Polymer heat-conducting polymers have thus become a newcomer in the field of heat-conducting materials, and their application fields have gradually expanded, such as heat exchange engineering, electronics, friction, etc. Materials, electromagnetic shielding, automotive manufacturing, etc. [0003] Since polymers are mostly poor conductors of heat, in the preparation process of thermally conductive polymers, the reasonable selection of thermally conductive fillers and matrix materials, the surface modification of filler particles, and the selection and optimization of composite material preparation processes have become important factors affecting thermal conductivity. The ...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L23/06C08K9/06C08K9/02C08K9/00C08K7/06C08K3/22C08K3/28C09K5/14
CPCC08K2003/282C08L77/02C08L2203/18C08L2207/062C09K5/14C08L23/06C08K9/06C08K9/02C08K9/00C08K7/06C08K3/22C08K3/28
Inventor 李笃信陈潜赵琼晖
Owner CENT SOUTH UNIV
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