Light heat prevention and insulation composite material and preparation method thereof

The invention discloses a light heat prevention and insulation composite material and a preparation method thereof, and relates to the technical field of thermal protection structures. The composite material is prepared by completely immersing a composite fabric in a resin matrix and performing curing by adopting a low-pressure resin transfer molding RTM process; wherein the composite fabric comprises a plurality of single-layer fabrics connected in a stacked mode, the densities of the single-layer fabrics are different, and the densities of all the single-layer fabrics are sequentially decreased progressively according to the stacking sequence. The composite material provided by the invention has excellent ablation resistance, heat insulation and heat matching performance; and the preparation method is simple, low in cost and short in period. 本申请公开一种轻质防隔热的复合材料及其制备方法，涉及热防护结构技术领域，所述复合材料由复合织物完全浸没在树脂基体中，采用低压树脂传递模塑成型RTM工艺固化制成；其中，所述复合织物包括多个层叠连接的单层织物，每个单层织物的密度均不同，且所有单层织物的密度按层叠顺序依次递减。本申请提供的复合材料具备优良的抗烧蚀、隔热以及热匹配性能；且其该