LED (light-emitting diode) high-thermal-conductivity composite material and preparation method thereof

A composite material and high thermal conductivity technology, which is applied in the field of LED high thermal conductivity composite materials and preparation, can solve the problems of high price of metal materials, low molding efficiency, and non-environmental protection, and achieve easy injection molding processing, low cost, and resource saving. Effect

Inactive Publication Date: 2015-07-22
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a kind of LED high thermal conductivity composite material and its preparation method aiming at the above-mentioned prior art, to replace products using metal materials as heat dissipation shells, such as various indoor and outdoor LED lamps, to overcome the metal The problem of high material price and difficult processing also solves the problems of low molding efficiency, heavy quality, unenvironmental protection, and unsafety

Method used

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  • LED (light-emitting diode) high-thermal-conductivity composite material and preparation method thereof

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preparation example Construction

[0033] The preparation method of the LED high thermal conductivity composite material is characterized in that it comprises the following steps:

[0034] 1) Use a coupling agent to carry out surface treatment on the flaky inorganic filler, add flaky inorganic filler to the base material with nylon resin, and place it in a ball mill to mix evenly;

[0035] 2) Add the powdered inorganic filler and flame retardant to the mixture obtained in step 1), and place it in the ball mill again to mix evenly;

[0036] 3) When the mixture obtained in step 2) is preheated to 60-80°C, add a compatibilizer, and place it in a ball mill again to mix evenly;

[0037] 4) Put the mixed raw materials in step 3) into twin-screw extruders for granulation, and pack them into bags; wherein the content of each component is 60-90wt.% nylon resin as the matrix material, treated with a coupling agent After mixing 5-30wt.% flake inorganic filler and powdered inorganic filler, 2-10wt.% flame retardant and 0....

Embodiment 1

[0039] Select 70% matrix material granular nylon (PA46) and 20% flake graphite to carry out surface treatment with silane coupling agent at 25°C, and then place them in a ball mill for uniform mixing; then add 5% thermally conductive filler silicon carbide and 3% inorganic Add the halogenated flame retardant into the ball mill and mix evenly again to test its flame retardant grade; then heat the above mixture to 70°C, add 2% maleic anhydride (MAH) compatibilizer, mix again in the ball mill evenly, and test its thermal conductivity performance and physical and mechanical properties, and analyze its microstructure (such as figure 1 Shown); Finally, carry out extruding granulation by twin-screw extruder after 270 ℃, cool to normal temperature and pack, the specific data of the physical property parameter of gained product are as shown in table 1.

[0040] Table 1

[0041] Performance indicators of thermally conductive composite materials

Embodiment 2

[0043] Select 75% base material nylon (PA66) and 15% flake graphite to use titanate coupling agent for surface treatment at 25°C, and then place them in a ball mill for uniform mixing; then add 5% thermally conductive filler silicon carbide and 2% Add the aluminum-magnesium flame retardant into the ball mill and mix it evenly again to test its flame retardant grade; then heat the above mixture to 80°C, add 3% glycidyl methacrylate (GMA) graft compatibilizer, and put it in the ball mill again Mix evenly in the medium, test its thermal conductivity and physical and mechanical properties, and analyze its microstructure; finally, it is extruded and granulated by a twin-screw extruder at 275 ° C, and cooled to room temperature for packaging.

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Abstract

The invention relates to an LED (light-emitting diode) high-thermal-conductivity composite material and a preparation method thereof. The LED high-thermal-conductivity composite material is prepared by mixing 60-90 wt.% of nylon resin as a base material, 5-30 wt.% of flaky inorganic filler and powdery inorganic filler subjected to surface treatment by a coupling agent, 2-10 wt.% of flame retardant and 0.5-2 wt.% of compatilizer. Compared with the prior art, the method enhances the thermal conductivity of the material; the method can prevent the hazard of product combustion and ignition caused by overhigh heat, thereby greatly enhancing the safety performance; the molecule-atom combination reaction rate is greatly enhanced, so that the base material and filler can be combined together more quickly and compactly, thereby enhancing the thermal conductivity of the material; the composite material has the advantages of simple preparation technique and low cost, and can save abundant resources; and the method is suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of polymer / inorganic composite materials, in particular to an LED high thermal conductivity composite material and a preparation method thereof. Background technique [0002] At present, the heat dissipation shell of LED lighting is mainly made of aluminum and aluminum alloy and other metals. It not only consumes a lot of mineral resources and energy, causes serious environmental damage and pollution, but also has complex processing and molding, heavy quality, and high cost. It is not suitable for daily life. Universal application. Therefore, in order to make LED lighting products enter thousands of households more quickly, the present invention focuses on solving the above problems, researches and develops high thermal conductivity that can be mass-produced and recycled, and has the advantages of light weight and low price. The heat-conducting functional material used as a heat-dissipating shell can improv...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K9/04C08K9/06C08K7/00C08K3/04C08K3/34C08K3/28C08K3/22
CPCC08L77/06C08K2201/003C08L2201/02C08L2201/22C08L2203/20C08L51/00C08K9/06C08K7/00C08K3/04C08K3/34C08K9/04
Inventor 陈继兵
Owner WUHAN POLYTECHNIC UNIVERSITY
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