Hydroxyethyl cellulose/alumina-based aerogels as lightweight insulating materials with high mechanical strength

摘要: Alumina aerogels reinforced with hydroxyethyl cellulose (HEC) have been successfully synthesised using an environmentally friendly freeze-drying method. are materials interesting properties, such as low density, high-temperature stability, high porosity and surface area, which can be used in several industrial applications. It is necessary to add one or more supporting materials, carbon nanofibres a fibrous second phase cellulose, the matrix reinforce mechanical properties of aerogels. In this study, influence HEC-to-aluminium tri-sec-butoxide (ASB) solution mass ratio on morphological, thermal its impact insulation resulting were evaluated. The apparent density cellulose-reinforced alumina-based increased amount HEC. Thus, compact structures small pore size obtained when increasing HEC/ASB ratio. incorporation HEC into ASB led increase terms Young’s modulus. Thermal stability samples varied consequence addition. decomposition stage shifted lower temperatures incorporation. addition, all showed conductivities. remarkable physical characteristics prepared herein successful synthesis suitable for scale-up make them good candidate construction