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A method for preparing a high-toughness thermally conductive functional composite material

A technology for functional composite materials and thermally conductive fillers is applied in the field of preparing high-toughness and thermally conductive functional composite materials, which can solve the problems of poor surface finish of composite products, damage to polymer material properties, and reduced impact strength, so as to increase added value and improve processing. The effect of performance, low production cost

Active Publication Date: 2016-01-06
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to improve the thermal conductivity of polymer materials, the amount of thermally conductive filler added is usually more than 30% of the mass of the matrix, which seriously damages the performance of polymer materials, such as a sharp drop in impact strength, poor fluidity, and poor surface finish of composite products.

Method used

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  • A method for preparing a high-toughness thermally conductive functional composite material
  • A method for preparing a high-toughness thermally conductive functional composite material
  • A method for preparing a high-toughness thermally conductive functional composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The method for preparing a high-toughness heat-conducting composite material in this embodiment uses polycarbonate as a substrate and boron nitride as a heat-conducting filler, including the following steps:

[0027] (1) Boron nitride is calcined at a high temperature of 800°C, cooled to room temperature, treated with a silane coupling agent, and then dried in a blast oven at 60°C for 6 hours;

[0028] (2) The boron nitride, hydrogenated styrene-butadiene-styrene block copolymer grafted with maleic anhydride and silicone oil lubricant after the coupling agent treatment and drying in step (1) is The ratio of 250:100:4 is pre-mixed in a high-speed mixer, and then melt-blended, extruded, and granulated by a twin-screw extruder to prepare a heat-conducting elastomer masterbatch with a "core-shell" structure, and then in The heat-conducting elastomer masterbatch was placed in a blast oven at 80° C. and dried for 2 hours to obtain a dried heat-conducting elastomer masterbatch...

Embodiment 2

[0041] The method for preparing a high-toughness thermally conductive composite material in this embodiment uses nylon 6 as the substrate and boron nitride as the thermally conductive filler, including the following steps:

[0042] (1) Boron nitride is calcined at a high temperature of 800°C, cooled to room temperature, treated with a silane coupling agent, and then dried in a blast oven at 70°C for 5 hours;

[0043] (2) Put the boron nitride and ethylene octene copolymer grafted maleic anhydride and pentaerythritol lubricant after the coupling agent treatment and drying in the step (1) at a weight ratio of 250:100:8. Pre-mixed in the mixer, and then melt blended, extruded, and granulated by a twin-screw extruder to prepare a heat-conducting elastomer masterbatch with a "core-shell" structure, and then place the heat-conducting elastomer masterbatch in the blast Dry in an oven at 80° C. for 2 hours to obtain dry heat-conducting elastomer masterbatches. Among them, the tempera...

Embodiment 3

[0056] The method for preparing a high-toughness thermally conductive composite material in this embodiment uses nylon 6 as the substrate, and boron nitride and aluminum nitride as thermally conductive fillers, including the following steps:

[0057] (1) Boron nitride and aluminum nitride are calcined at a high temperature of 800°C, cooled to room temperature, treated with a silane coupling agent, and then dried in a blast oven at 70°C for 5 hours;

[0058] (2) The boron nitride, aluminum nitride and ethylene octene copolymer grafted with maleic anhydride and pentaerythritol lubricant after the coupling agent treatment and drying in step (1) are 240:10:100 by weight :8 (the ratio of the total amount of the two fillers, the elastomer compatibilizer and the processing aid is 250:100:8) is pre-mixed in a high-mixer, and then melted and blended by a twin-screw extruder, Extrude and granulate to prepare a thermally conductive elastomer masterbatch with a "core-shell" structure, and...

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Abstract

The invention relates to a method for preparing a high-toughness heat-conducting functional composite material. This method is based on the basic principle of core-shell structure toughening, and the heat-conducting filler is designed as the core, and the elastomer is designed as the shell, so as to achieve high filling and give full play to the toughening effect of the elastomer. The specific implementation method is to firstly prepare heat-conducting composite material master batches from heat-conducting fillers, elastomer compatibilizers, and processing aids, and then melt and blend them with a certain proportion of engineering plastics. The high-toughness and heat-conducting functional composite material prepared by the method of the present invention has functions such as high toughness, high thermal conductivity and good processing fluidity, and can be applied to molding processes such as extrusion and injection. It has good application prospects, and its production process is simple and easy to operate. The control is convenient, the quality is stable, the production efficiency is high, and it has broad industrialization and market prospects.

Description

technical field [0001] The invention relates to a method for preparing a high-toughness heat-conducting functional composite material, which belongs to the technical field of functional composite materials. Background technique [0002] With the development of science and technology, electronic devices tend to be lighter in weight and faster in computing. However, the resulting heat is difficult to dissipate, and it is easy to affect the life of the electronic device, so that the whole machine is paralyzed. To solve this problem, a heat sink can usually be added. Usually, the heat sink is made of metal, which sometimes causes noise, and is difficult to manufacture, and the cost is relatively high. In order to find an alternative material, polymer-based thermally conductive composites have attracted more and more attention in recent years. However, compared with metal materials, the thermal conductivity of polymer materials is relatively low (less than 0.5W / mK), which is di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L77/02C08L77/06C08L79/08C08L71/12C08L81/02C08L59/00C08L55/02C08L67/02C09K5/14C08K9/10C08K9/06C08K3/04C08K3/08C08K3/34C08K3/38C08K3/14C08K3/28C08K3/22C08J3/22B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92
Inventor 吴宏张先龙郭少云
Owner SICHUAN UNIV
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