A kind of flexible inflatable heat shield and preparation method thereof

Abstract

The invention provides a flexible inflating heat shield and a preparation method thereof. The flexible inflating heat shield is composed of a plurality of flexible anti-ablation layers, a plurality offlexible anti-radiative layers and a flexible high-temperature-resistant airtight layer, wherein the flexible anti-ablation layers and the flexible anti-radiative layers are distributed alternately in a structure of S-F-S-F...-S-F structure from outside to inside, S is the flexible anti-ablation layer, F is the flexible anti-radiative layer, the flexible high-temperature-resistant airtight layeris located on the innermost side, and the flexible anti-ablation layers, the flexible anti-radiative layers and the flexible high-temperature-resistant airtight layer are adhered by means of a silicone rubber adhesive. By adding a proper amount of phenolic resin and nano ceramic powder into a silicon rubber system, a silicone rubber coated fabric is vitrified at a high temperature while keeps theflexibility, so that the anti-ablation property is improved remarkably, the number and thickness of layers of the anti-ablation layers are reduced effectively, and the flexible inflating heat shield has a good folding property.

Description

technical field

[0001] The invention relates to a flexible inflatable heat shield and a preparation method thereof, belonging to the technical field of ablation-resistant composite materials. Background technique

[0002] With the rapid development of aerospace technology, the development of large-scale, high-tonnage reentry vehicles has attracted widespread attention at home and abroad. Rockets, missiles, spacecraft and other aircraft have high operating temperatures, generally above 2000K, and aerodynamic heating or power flames produce The heat flow and high temperature of the spacecraft have exceeded the range that the material can withstand, and effective thermal protection must be carried out. The efficient thermal protection technology of spacecraft has gradually become one of the key technical bottlenecks restricting its development. The aerodynamic configuration and thermal protection structure of traditional reentry spacecraft mostly adopt fixed rigid structures, w...

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