Silica-cellulose hybrid aerogels for thermal and acoustic insulation. applications
Silica–cellulose
aerogels were successfully developed from recycled cellulose fibres and
methoxytrimethylsilane (MTMS) silica precursor for the first time.
The
developed silica– cellulose aerogels showed the super-hydrophobicity with an
average water contact angle of 151 o .
Their
thermal conductivity was approximately 0.04 W/mK. Moreover, the thermal
degradation temperature for the cellulose component of the silica–cellulose
aerogels showed a 25 o C improvement over those for cellulose aerogels.
The
sound absorption coefficients of 3 the silica–cellulose aerogels with a 10 mm
thickness were 0.39–0.50, better than those of cellulose aerogels (0.30–0.40)
and commercial polystyrene foams.
When
the cellulose fibre concentration increases from 1.0 to 4.0 wt. %, the
compressive Young’s modulus of the silica–cellulose aerogels can be enhanced
160%, up to 139 KPa.
This
work provides a facile approach to fabricate cost-effective and promising
silica–cellulose aerogels with industrial dimensions for thermal and acoustic
insulation applications.
Title:
| Silica-cellulose hybrid aerogels for thermal and acoustic insulation. applications | |
| Authors: | Feng, Jingduo Le, Duyen Nguyen, Son T. |
| Keywords: | Aerogel thermal insulation acoustic insulation recycled cellulose fibre |
| Issue Date: | 2016 |
| Publisher: | H. : ĐHQGHN |
| Citation: | ISIKNOWLEDGE |
| Abstract: | Silica–cellulose aerogels were successfully developed from recycled cellulose fibres and methoxytrimethylsilane (MTMS) silica precursor for the first time. The developed silica– cellulose aerogels showed the super-hydrophobicity with an average water contact angle of 151 o . Their thermal conductivity was approximately 0.04 W/mK. Moreover, the thermal degradation temperature for the cellulose component of the silica–cellulose aerogels showed a 25 o C improvement over those for cellulose aerogels. The sound absorption coefficients of 3 the silica–cellulose aerogels with a 10 mm thickness were 0.39–0.50, better than those of cellulose aerogels (0.30–0.40) and commercial polystyrene foams. When the cellulose fibre concentration increases from 1.0 to 4.0 wt. %, the compressive Young’s modulus of the silica–cellulose aerogels can be enhanced 160%, up to 139 KPa. This work provides a facile approach to fabricate cost-effective and promising silica–cellulose aerogels with industrial dimensions for thermal and acoustic insulation applications. |
| Description: | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS Volume: 506 Pages: 298-305 ; TNS06340 |
| URI: | http://repository.vnu.edu.vn/handle/VNU_123/26337 |
| Appears in Collections: | Bài báo của ĐHQGHN trong Web of Science |
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