Nanometer titanium nitride-microcrystalline ceramic filling-modified PA6/ABS composite thermal conductive plastic for LEDs and preparation method thereof

Abstract

The invention discloses a nanometer titanium nitride-microcrystalline ceramic filling-modified PA6 / ABS composite thermal conductive plastic for LEDs and a preparation method thereof. The thermal conductive plastic employs a mixture of PA6 and ABS plastics and has excellent plasticity, durability and electric insulation performance; and microcrystalline ceramic powder and nanometer titanium nitride are utilized for thermal conduction modification of ABS and PA6, respectively, composite short fibers with high thermal conductivity are prepared from the modified PA6 / ABS composite materials through melt spinning, conductive filling materials in the obtained composite short fibers are uniformly dispersed, and the composite short fibers are more uniformly dispersed and bonded in later mixing and can form a uniform and stable heat transfer network, so the phenomenon of nonuniform heat transfer of plastics in traditional production methods can be improved and the utilization rate of the thermal conductive filling materials can be enhanced. Test results show that the composite thermal conductive plastic has excellent thermal conductivity, a stable form and insulation performance, is safe, compact and smooth, and can be widely used in the field of heat dissipation of the LEDs.

Description

technical field [0001] The invention relates to the technical field of heat-conducting plastic preparation, in particular to a PA6 / ABS composite heat-conducting plastic filled and modified by nano-titanium nitride-microcrystalline ceramics for LEDs and a preparation method thereof. Background technique [0002] As a new generation of light source, LED has a direct relationship with its light output efficiency and lifespan and the working temperature of the chip. The heat dissipation problem has always been the focus of attention. Regardless of LED chip packaging or lighting design applications, it is often necessary to release the heat generated by LEDs through thermally conductive materials. The cost of heat dissipation also accounts for about 20% to 30% of the system cost. The search for cost-effective heat dissipation solutions has always been Become the goal pursued by the industry. [0003] At present, in the production of LED lighting sources and lamps, metal aluminum...

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Problems solved by technology

[0003] At present, in the production of LED lighting sources and lamps, metal aluminum or ceramic materials are mainly used as heat conduction and heat dissipation systems. However, these materials have some defects in the actual use process. For example, although aluminum-based heat dissipation materials have relatively good heat dissipation capabilities, However, there are problems such as long molding process cycle, electrical conductivity, and single shape. Although ceramic materials are insulating, they have a large specific gravity and high molding difficulty, which is not conducive to mass production and its application is also limited.

[0004] Organic thermally conductive plastics have gradually attracted the attention of the industry in recent years. First, the plastic itself has the advantages of good insulation, light weight, low price, and diverse shapes, which provides a new idea and solution for the production of LED lighting products. Thermally conductive plastics The difficulty lies in improving its thermal conductivity. The traditional production method is mainly obtained by directly mixing high thermal conductivity fillers in plastics, blending and extruding. The thermal conductivity plastics produced by this method generally have uneven thermal conductivity and low utilization of fillers. The problem of its comprehensive heat conduction and heat dissipation still needs to be improved