SiO2气凝胶常压干燥工艺与隔热应用进展

Progress of Preparation of Silica Aerogel at Ambient Pressure Drying and Its Application in Thermal Insulation

综述了SiO2气凝胶常压制备技术及其复合隔热材料的最新研究进展。着重介绍了提高凝胶网络基架强度、添加干燥控制化学添加剂、表面改性、降低毛细管力等几种SiO2气凝胶常压干燥工艺,并回顾了几种SiO2气凝胶复合隔热材料的应用现状。

In this article,the progress of the drying technology at ambient pressure of silica aerogels and of the application of silica aerogel composite as the insulating material were reviewed.Several drying processes of silica aerogel such as improving the strength of gel network framework,adding chemical additives,surface modification,reducing the capillary force and so on are summerized.In addition,the application of silica aerogels composites have been introduced as well.