二氧化硅气凝胶复合材料热导率优化研究进展

摘要

SiO2 aerogel composites have a good energy-saving application prospects in architecture,aviation,and other industry fields for its excellent mechanical and thermal insulation performance.The mechanism of the thermal conductivity of SiO2 aerogel composites was summarized from the geometric features,contents,and arrangement of the reinforced materials.The research progress of experimental and theoretical optimization on the thermal conductivity of SiO2 aerogel composites was reviewed.Furthermore,the existing problems of optimizing the thermal conductivity of the SiO2 aerogel composites were analyzed,the method for optimizing the thermal conductivity of the composites was also proposed,providing theoretical guidance for preparation high performance insulation SiO2 aerogel composites.%二氧化硅气凝胶复合材料由于具有良好的力学和隔热性能,在建筑、航空和其他工业领域展现出良好的节能应用前景.从增强材料的几何特征、含量、排列方式等方面概述了二氧化硅气凝胶复合材料热导率的规律,综述了二氧化硅气凝胶复合材料热导率的实验和理论优化研究进展,分析了现阶段实验和理论模型优化二氧化硅气凝胶复合材料热导率存在的问题,并提出了优化二氧化硅气凝胶复合材料热导率的方法,为制备高隔热性能的二氧化硅气凝胶复合材料提供理论指导.