Abstract
Silicacellulose aerogels were successfully developed from recycled cellulose fibres and methoxytrimethylsilane (MTMS) silica precursor for the first time. The developed silicacellulose aerogels showed the super-hydrophobicity with an average water contact angle of 151°. Their thermal conductivity was approximately 0.04W/mK. Moreover, the thermal degradation temperature for the cellulose component of the silicacellulose aerogels showed a 25°C improvement over those for cellulose aerogels. The sound absorption coefficients of the silicacellulose aerogels with a 10mm thickness were 0.390.50, better than those of cellulose aerogels (0.300.40) and commercial polystyrene foams. When the cellulose fibre concentration increases from 1.0 to 4.0wt.%, the compressive Youngs modulus of the silicacellulose aerogels can be enhanced 160%, up to 139KPa. This work provides a facile approach to fabricate cost-effective and promising silicacellulose aerogels with industrial dimensions for thermal and acoustic insulation applications.
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