Aluminum oxide-nylon heat conduction composite material for LED lamp and preparing method thereof

Abstract

An aluminum oxide-nylon heat conduction composite material for an LED lamp is prepared from, by weight, 200 parts of nylon 6, 50-60 parts of aluminum oxide, 20-30 parts of carbon fiber, 50-60 parts of acetone, 80-100 parts of nitric acid of 60-70%, 3-4 parts of silane coupling agent A-171, 70-80 parts of acetic acid aqueous solution of 1-3%, 15-20 parts of isophorone diisocyanate, 20-25 parts of (methyl)hydroxyethyl acrylate, 0.4-1 part of catalyst, 0.4-2 parts of polymerization inhibitor, 150-170 parts of tetrahydrofuran, 80-100 parts of methylbenzene and a proper amount of deionized water. Surface modification is conducted on carbon fiber, aluminum oxide is coated with a high polymer, compatibility of carbon fiber, aluminum oxide and nylon 6 is improved, dispersion of carbon fiber and aluminum oxide in nylon 6 can be achieved easily, and therefore the tensile property, bending property and impact resistance of a product can not be affected after the heat conduction material aluminum oxide is added.

Description

technical field [0001] The invention relates to a nylon heat-conducting material and a preparation method thereof, in particular to an alumina-nylon heat-conducting composite material for LED lamps. Background technique [0002] Generally speaking, the thermal conductivity of pure plastic materials is far lower than that of metal and ceramic materials, but its insulation performance is good. Thermally conductive plastics not only have the heat transfer properties of metals and ceramics, but also retain the advantages of ordinary plastics in terms of design, performance and cost. Low molding shrinkage, low working temperature and improved design freedom are widely used in various industries. [0003] At present, the most typical application of heat-conducting plastics is in the field of lighting, mainly used to make lamp cups of LED energy-saving lamps that require good heat dissipation. Although the heat consumed by LED energy-saving lamps is much smaller than that of ordin...

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Problems solved by technology

[0003] At present, the most typical application of heat-conducting plastics is in the field of lighting, mainly used to make lamp cups of LED energy-saving lamps that require good heat dissipation. Although the heat consumed by LED energy-saving lamps is much smaller than that of ordinary light sources, because LED energy-saving lamps Compact and powerful, how to effectively dissipate heat remains an important issue

[0004] Chinese patent application CN102408710A discloses a high thermal conductivity nylon 66 composite material. The base material is all made of nylon 66, which has high hardness. After adding thermal conductive fillers, the tensile and bending properties of the material will deteriorate, and only a coupling agent is added to the formula. And antioxidants, the processability of the whole system is poor, and there will be broken ends in the production extrusion process, which is not suitable for industrial continuous production