Insulating high-strength nano composite material and preparation method thereof

Abstract

The invention discloses an insulating high-strength nano composite material which is prepared from the following raw materials in parts by weight: 1) 1-10 parts of a hydroxylated boron nitride / nylon 6master batch, and 2) 100 parts of nylon 6. The composite material is composed of a nylon 6 matrix and hydroxylated boron nitride; a preparation method comprises the steps: adding hydroxylated boron nitride with the content of 50-70% into caprolactam through an in-situ polymerization method, carrying out ring-opening polymerization on caprolactam, grafting nylon onto hydroxylated boron nitride through a grafting reaction with surface functional groups, and thus preparing the high-content hydroxylated boron nitride / nylon 6 master batch. The nano composite material provided by the invention hasexcellent heat-conducting property and can be widely applied to the field of heat dissipation of automobiles, computers, LEDs and the like. The invention further discloses the preparation method for the insulating high-strength nano composite material, the in-situ grafting technology is adopted, high-filling-capacity boron nitride is uniformly dispersed in the matrix so as to reduce interface thermal resistance, and the insulating high-strength nano composite material is reasonable in preparation process and low in comprehensive cost.

Description

technical field [0001] The invention relates to the field of heat-conducting polymer composite materials, in particular to an insulating high-strength nano-composite material and a preparation method thereof. Background technique [0002] With the high frequency and high speed of electronic devices and the rapid development of integrated circuit technology, electronic devices have higher and higher requirements for heat dissipation, and fast and effective thermal diffusion has become a very critical technology in material development. Polymers are ideal thermal management materials due to their ease of preparation, light weight, and low cost. [0003] Nylon 6 has excellent mechanical properties, good electrical properties, wear resistance, oil resistance, solvent resistance, self-lubrication, corrosion resistance and good processing performance. It is one of the varieties with the largest output among polyamide plastics and is widely used in automobiles. , electronics, mach...

AI Technical Summary

Problems solved by technology

[0004] The Chinese patent application publication number is CN103450674A, "A High Thermal Conductivity Nylon 6 / Graphene Nanocomposite Material and Its Preparation Method". 6 The degree of dispersion in the matrix reduces agglomeration, but the thermally conductive filler used in this method has excellent electrical conductivity and is not suitable for insulating materials. At the same time, because the maximum amount of thermally conductive filler added is only 10%, the thermal conductivity is not significantly improved.

The Chinese patent application publication number is CN10675177A, "A Nylon 6-Graphene Thermally Conductive Functional Masterbatch and Its Preparation Method". This method directly melts and extrudes graphene and nylon 6 without in-situ polymerization and filler functionalization. The dispersion of graphene in the matrix is ​​uneven, the effect of improving thermal conductivity is not obvious, and the price of graphene is high, resulting in high overall cost of materials

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