Thermal insulation composite material based on aerogel and preparation method thereof

Methyltrimethoxysilane is adopted as a silicon source and is cross-linked with modified chitosan under the action of a silane coupling agent, the obtained thermal insulation composite material is of a three-dimensional network structure, pore channels are uniformly distributed, gel particles are mutually connected, and the thermal insulation composite material has good thermal insulation performance. The aerogel conforms to the definition of aerogel, and is a heat-preservation and heat-insulation material with good practicability; the specific surface area of the thermal insulation composite material is 853.2 m < 2 >/g, the tap density is 0.15 g/cm < 3 >, and the heat conductivity coefficient is 0.012 W/(mK). 本发明公开了一种基于气凝胶的保温隔热复合材料及其制备方法，采用甲基三甲氧基硅烷为硅源，在硅烷偶联剂的作用下，与改性壳聚糖进行交联，得到保温隔热复合材料为三维网状结构，孔道分布均匀，凝胶颗粒相互连接，符合气凝胶的定义，是一种实用性良好的保温隔热材料；该保温隔热复合材料的比表面积为853.2m2/g,振实密度0.15g/cm3,导热系数为0.012W/(m*K)。