Active carbon fiber-loaded nano composite flame retardant and coating method

Abstract

The objective of the invention is to provide an active carbon fiber-loaded nano composite flame retardant and a coating method, which belong to the technical field of flame retardants and solve the current problems of low dosage of flame retardant in asphalt pavements, influence on the conventional service performance of asphalt, fast release process and proof flame-retardant effect. According tothe active carbon fiber-loaded nano composite flame retardant, firstly, under the condition of ultrasonic wave-assisted dispersion, active carbon fibers are added into the mixed acid solution of concentrated sulfuric acid and concentrated nitric acid, and oxidation is carried out; secondly, the mixed acid solution is diluted, the active carbon fibers are put onto a microporous filter membrane, andthe active carbon fibers are washed and dried in an oven; thirdly, the active carbon fibers are added into a nano composite flame retardant ionic salt solution, ultrasonically dispersed and added with an ammonia precipitant, and agitation is carried out at room temperature, so that a nano composite flame retardant is deposited into the pores of the active carbon fibers and onto the surfaces of the active carbon fibers; and finally, after being dried, the active carbon fibers are added into silicone-acrylic emulsion, so that coating layers are formed on the surfaces of the active carbon fibersto fix nano composite flame retardant particles. The dosage of the flame retardant in the asphalt pavements is increased, and the flame-retardant and smoke-suppressing effect is increased.

Description

technical field [0001] The invention relates to an activated carbon fiber-loaded nano-composite flame retardant and a coating method, which belong to the technical field of asphalt pavement flame retardancy. Background technique [0002] In recent years, my country's transportation infrastructure has shown leapfrog development, and the construction of road tunnels has also increased accordingly. However, the flammability of asphalt is a major safety problem faced by asphalt pavement in tunnels. When a fire occurs in a tunnel, the temperature rises sharply, and the asphalt pavement participates in combustion. , producing a large amount of heat and toxic fumes, and due to the particular location of the tunnel and the limitation of narrow and long space, it brings great difficulties to the escape of trapped personnel and fire rescue, resulting in heavy casualties and property losses. [0003] In order to make the asphalt pavement give full play to its own advantages and at the s...

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Problems solved by technology

[0008] The object of the present invention is to provide a nanocomposite flame retardant loaded with activated carbon fiber and a coating method. The method adopts activated carbon fiber to load the nanocomposite flame retardant and selects a suitable coating material to coat it to solve the current problem. Asphalt pavement flame retardant content is low, affecting the general performance of asphalt pavement, the release process is fast, and the flame retardant effect is poor. Improve the efficient inhibition of flame retardants on the thermal decomposition process of asphalt

[0010] In view of the problems of low flame retardant content in asphalt pavement, affecting the conventional performance of asphalt pavement, fast release process, and poor flame retardant effect, the present invention provides a nanocomposite flame retardant loaded with activated carbon fiber and coated Methods