Carbon fiber reinforced nylon 6 resin composite material and preparation method thereof

Abstract

The invention relates to a carbon fiber reinforced nylon 6 resin composite material with excellent heat conducting performance and a preparation method thereof. The composite material consists of the following materials in parts by weight: 100 parts of nylon 6 resin, 20-80 parts of carbon fiber, 10-20 parts of inorganic filling material, 0.5-5 parts of coupling agent, 0.2-1 part of antioxidant and 0-3 parts of lubricating agent. The preparation method comprises the following steps: weighing each component raw material in proportion; mixing each component raw material except for the carbon fiber at a high speed; adding an obtained mixed material into a double-screw extruder hopper, adding the carbon fiber from a fiber charging opening of the extruder, and then extruding and pelletizing. Compared with the prior art, the composite material provided by the invention is high in rigidity and good in heat conducting performance, is suitable for production and processing of thin-walled and light-weight automobile parts and electronic/electrical products; meanwhile, the composite material is low in raw material cost and simple in manufacturing process, and is suitable for industrial continuous production.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber composite materials, and in particular relates to a carbon fiber reinforced poly-nylon 6 composite material with excellent thermal conductivity and a preparation method thereof. Background technique [0002] Nylon 6 is widely used in the fields of electronic appliances, automobile industry and machinery, instruments and household appliances, etc. widely used. Improving the mechanical properties and thermal conductivity of nylon 6 plays an increasingly important role in the manufacture of lightweight auto parts and miniaturized electronic and electrical components, promoting their heat dissipation, improving precision, and extending life. [0003] Composite modification methods can be used to improve the strength and thermal conductivity of polymer materials. In order to improve the strength of nylon 6 resin, glass fiber, carbon fiber, etc. can generally be used to enhance the composite meth...

AI Technical Summary

Problems solved by technology

However, metal thermally conductive fillers have the disadvantages of high density, corrosion, and the decline in the mechanical properties of nylon 6 materials; inorganic non-metallic fillers are not very effective in improving the thermal conductivity of nylon 6 resins, and often also reduce the mechanical properties of nylon 6 resins.

Although the methods of using graphene, carbon nanotubes and nano-carbon fibers in carbon materials can significantly improve the thermal conductivity of nylon 6 resin, these materials cannot be industrialized and mass-produced, and the price is expensive, and the technology involved is only limited. in the laboratory research stage

High-performance pitch-based carbon fiber is a rare carbon material with a graphite structure that has achieved large-scale industrial production. Japan’s Teijin Corporation (such as Chinese patent CN101935919B, etc.) uses pitch-based carbon fiber with high thermal conductivity to improve polycarbonate and polyphenylene sulfide. , polypropylene, polylactic acid and silicone and other resins, but there are no reports of using this method to improve the thermal conductivity and / or mechanical properties of nylon 6