【摘要】 采用羟基化的玻璃纤维作为增强体来提升SiO₂气凝胶力学性能。通过正交实验确定最优工艺参数，对比研究玻璃纤维羟基化以及纤维添加量和长度对SiO₂气凝胶的影响，并研究其影响机制。结果表明：最佳成分比所得SiO₂气凝胶的孔隙率达到97.34%,羟基化玻璃纤维能够有效提高SiO₂气凝胶的力学性能，且当添加质量分数为5%,短纤维（3 mm）与长纤维（10 mm）质量比为2∶8时，SiO₂气凝胶导热系数为0.028 4 W/（m·K）,抗压强度达到0.37 MPa。更多还原

【Abstract】 Hydroxylated glass fibers are used as reinforcement to enhance the mechanical properties of SiO₂ aerogel. The optimal process parameters were determined through orthogonal experiments. A comparative study was conducted on the effects of glass fiber hydroxylation, as well as the amount and length of fiber additions on SiO₂ aerogels, including an investigation of their mechanisms of influence. The results showed that the porosity of SiO₂ aerogel obtained from the optimal composition ratio reached 97.34%. Hydroxylated glass fibers effectively improved the mechanical properties of SiO₂ aerogel. When the added mass fraction was 5% and the ratio of short fibers（3 mm） to long fibers（10 mm） was 2∶8, the thermal conductivity of SiO₂ aerogel was 0.028 4 W/（m·K） and the compressive strength reached 0.37 MPa.更多还原