Silicon carbide-polyamide thermal conductive composite material for LED lamps and preparation method of material

Abstract

The invention provides a silicon carbide-polyamide thermal conductive composite material for LED lamps. The composite material is prepared from, by weight, 6-200 parts of polyamide, 20-30 parts of micro-nano silicon carbide whiskers, 3-4 parts of sodium laurate, 3-4 parts of phosphite, 20-30 parts of carbon fibers, 50-60 parts of acetone, 80-100 parts of 60%-70% nitric acid, 3-4 parts of silane coupling agent A-171, 70-80 parts of 1%-3% of acetic acid aqueous solution, 15-20 parts of methylene di-p-phenyl diisocyanate, 20-25 parts of 2-hydroxypropyl methacrylate, 0.4-1 part of catalyst, 0.4-2 parts of polymerization inhibitor, 150-170 parts of tetrahydrofuran, 80-100 parts of methylbenzene and an appropriate amount of deionized water. According to the silicon carbide-polyamide thermal conductive composite material for the LED lamps, silicon carbide which is stable in chemical property, high in thermal conductivity, small in thermal expansion coefficient and good in wear-resisting property is used, and by means of the synergistic effect of silicon carbide and the carbon fibers, the thermal conduction property of the polyamide thermal conductive composite material is enhanced.

Description

technical field [0001] The invention relates to a nylon heat-conducting material and a preparation method thereof, in particular to a silicon carbide-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 o...

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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