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Method for preparing high-tenacity composite material with heat conducting function

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: 2013-12-11
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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  • Method for preparing high-tenacity composite material with heat conducting function
  • Method for preparing high-tenacity composite material with heat conducting function
  • Method for preparing high-tenacity composite material with heat conducting function

Examples

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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 silicon oil lubricant after the coupling agent treatment and drying in step (1) is in a weight ratio of 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 e...

Embodiment 2

[0042] 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:

[0043] (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;

[0044] (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 a dry heat-conducting elastomer masterbatch. Among them, the tempera...

Embodiment 3

[0057] 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:

[0058] (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;

[0059] (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 thermally conductive elastomer masterbatches with a "core-shell" structure, ...

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Abstract

The invention relates to a method for preparing a high-tenacity composite material with a heat conducting function. The method for preparing the high-tenacity composite material with the heat conducting function adopts the basic principle that a core-shell structure can enhance tenacity, heat conducting filler is designed into a core, and an elastomer is designed into a shell, so that high filling is realized while the tenacity enhancing effect of the elastomer is fully played. The method for preparing the high-tenacity composite material with the heat conducting function comprises the following concrete steps: firstly preparing master batch of a heat conducting composite material from the heat conducting filler, an elastomer compatilizer and a processing aid, and then carrying out melt blending on the master batch of the heat conducting composite material with engineering plastic in a certain ratio. The high-tenacity composite material with the heat conducting function, prepared by adopting the preparation method, has the functions of high tenacity, high heat conductivity coefficient, good processing fluidity and the like, can be applied to moulding processing such as extrusion and injection, has a good application prospect, is simple in production process, easy to operate and control, stable in quality and high in production efficiency and 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 0.5 W / mK), which is d...

Claims

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Application Information

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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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