A chopped carbon fibre (CF) reinforced silica-phenolic resin (Si/PR) aerogel nanocomposite was prepared through a simple one-pot sol-gel polymerization in a slurry of CF, PR, silane, hexamethylenetetramine and ethylene glycol. CFs were distributed homogeneously and randomly in the Si/PR aerogels. The Si/PR aerogels exhibit finer microstructure, higher thermal stability and better anti-oxidation resistance than PR aerogels. The compressive strength for the composites with low densities between 0.402 and 0.463 g/cm³ ranged from 0.33 to 2.44 MPa and thermal conductivities from 0.089 to 0.116 W/(mK), respectively. Furthermore, the CF/Si/PR aerogel nanocomposites could deliver linear ablation rates as low as 0.117 mm/s, and internal temperature peaks approximately 100 °C at 38 mm in-depth position as the surface temperature exceeded 1800 °C in oxyacetylene flame. From mentioned above, this lightweight composite presents huge application prospects in thermal protection and heat insulation field, especially in aerospace industry.

通过在CF，PR，硅烷，六亚甲基四胺和乙二醇的浆液中进行简单的一锅式溶胶-凝胶聚合，制备了短切碳纤维（CF）增强的硅酚醛树脂（Si / PR）气凝胶纳米复合材料。CFs在Si / PR气凝胶中均匀且随机分布。Si / PR气凝胶比PR气凝胶具有更好的微观结构，更高的热稳定性和更好的抗氧化性。在0.402至0.463 g / cm ³之间的低密度复合材料的抗压强度范围从0.33到2.44 MPa，热导率从0.089到0.116 W /（mK）。此外，CF / Si / PR气凝胶纳米复合材料可提供低至0.117 mm / s的线性消融速率，并且在氧乙炔火焰中，当表面温度超过1800°C时，内部温度在38 mm深度处达到约100°C的峰值。综上所述，这种轻质复合材料在热防护和绝热领域，尤其是在航空航天工业中具有广阔的应用前景。