Nanometer flame-retardant soundproof adiabatic material used for aerospace

Abstract

The invention provides a nanometer flame-retardant soundproof adiabatic material used for aerospace. The nanometer flame-retardant soundproof adiabatic material used for aerospace comprises a surfacelayer, a middle layer and a bottom layer, wherein the middle layer is porous material fibers, the surface layer is a mirror aluminium foil covered with nanometer SiO2, and the bottom layer is an aluminium-plastic compound material. The middle of the adiabatic material is of a porous material fiber structure, and glass fibers used for aerospace and astronavigation are adopted, so that gas convection is effectively reduced, and the nanometer flame-retardant soundproof adiabatic material used for aerospace has excellent thermal-insulation performance and sound-absorption noise-reduction performance; the bottom layer is the aluminium-plastic compound material, is formed by compounding multiple layers of films, and has an excellent thermal-insulation effect; and the surface layer is the mirroraluminium foil covered with the nanometer SiO2, so that the anti-oxidation capability and the corrosion-resistant capability of the aluminium foil are improved, the reflectivity of the aluminium foilis not affected, and the fact that the material is used in a severe environment for a long term, and is not oxidized or corroded can be guaranteed.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials for aerospace, in particular to a nano flame-retardant sound-insulation and heat-insulation material for aerospace. Background technique [0002] Insulation materials refer to materials or material composites with significant resistance to heat flow, generally with thermal coefficients lower than 0.174W / (m.k), and are widely used in aerospace, energy power, electrical appliances, building materials, pipeline transportation, Food refrigeration and many other fields. At present, the commonly used insulation materials mainly include: foam glass, polystyrene foam, rubber powder polystyrene particle insulation material, insulation mortar, aerated concrete, foamed asbestos, composite silicate insulation material, etc. These materials have a single thermal insulation method, all of which increase the porosity and reduce heat conduction to reduce the overall thermal conductivity of the materia...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems such as poor shock absorption, low horizontal and vertical tensile strength, and poor thermal insulation performance of thermal insulation materials, the present invention provides a nano-scale flame-retardant sound-insulation thermal insulation material for aerospace, including a surface layer, a middle layer, and a bottom layer. , the middle layer is a porous material fiber, and the surface layer is nano-SiO 2 Coated mirror aluminum foil, the bottom layer is aluminum-plastic composite material, in which the transverse tensile strength of the nano-flame-retardant sound-insulating and heat-insulating material is 1.18×10 3 KPa-3.5×10 3 KPa, the longitudinal tensile strength is 1.06×10 3 KPa-2.8×10 3 KPa, reflectivity 0.86-0.95, sound absorption coefficient 0.46-0.89

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