Layered flame-retardant material and preparation method thereof

Abstract

The invention provides a layered flame-retardant material and a preparation method thereof. The preparation method comprises the following steps: performing ultrasonic dispersion on N, N-dimethylformamide and graphene oxide, then adding an intumescent flame retardant, performing ultrasonic dispersion, centrifugation, cleaning and drying, and obtaining a first modified flame retardant; performing ultrasonic dispersion on N, N-dimethylformamide and graphene oxide, then adding an intumescent flame retardant, performing ultrasonic dispersion, then adding dicyclohexylcarbodiimide, and performing mechanical stirring, centrifugation, cleaning and drying to obtain a second modified flame retardant; performing drying, mixing, extrusion granulation, drying and injection molding on the first modified flame retardant or the second modified flame retardant, an intumescent flame retardant and polybutylene terephthalate and obtaining the layered flame-retardant material. The invention also comprises the layered flame-retardant material prepared by the method. The intumescent flame retardant is introduced into the graphene oxide in-situ interlayer, the flame retardant property of the flame retardant material is improved, and the problems that in the prior art, the flame retardant property is poor, molten drops are prone to occurring, and the mechanical property is reduced are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of flame retardant materials, and in particular relates to a layered flame retardant material and a preparation method thereof. Background technique [0002] Polymer materials have the advantages of light weight, high strength, good stability, good electrical insulation performance, and good aging resistance. They have largely replaced the use of metal materials and are widely used in automobiles, electronic appliances, mechanical equipment, construction, etc. industry, but due to its poor flame retardancy, it poses a huge threat to people's lives and property, thus limiting its development. Therefore, it is necessary to improve the flame retardancy of polymer materials. From the perspective of the types of flame retardants, they are mainly divided into two types: halogen-containing and halogen-free flame retardants. Adding a small amount of halogen-containing flame retardant can achieve excellent flame re...

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Problems solved by technology

[0003] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a layered flame retardant material and a preparation method thereof. During the preparation, the in-situ reaction of the intumescent flame retardant and graphene oxide is used to introduce the intumescent flame retardant into oxidation Graphene interlayer in situ improves the flame retardant performance of flame retardant materials and the viscosity under the action of heat source, effectively solving the problems of poor flame retardant performance, easy melting drops and decreased mechanical properties in the prior art

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