| abstract |
The invention discloses an in-situ preparation method of cellulose-silicon dioxide composite aerogel. The cellulose-SiO2 composite aerogel is prepared from cellulose and organic silicon alkoxide as raw materials and aqueous alkali as a solvent and a catalyst; the porosity of the composite aerogel can be up to 96.6%; and the density is 0.052g/cm<3>. The in-situ preparation method is simple, feasible, energy-saving and environment-friendly; the defects of poor dispersing uniformity, low controllability of composite content, poor stability of a composite phase and the like in the prior art are overcome; the prepared composite aerogel material has relatively low heat-conducting coefficient and good heat-insulating property, and has wide application prospects in the fields of civil industry and medium-low temperature heat protection with special requirements; and a basis is provided for application of the composite aerogel material in the field of heat insulation. |