An Environment-Friendly Thermal Insulation Material from Porous Cellulose Aerogel

Abstract:

Cellulose hydrogel was prepared by using the NaOH/ Thiourea/ H₂O as solvent system, cellulose aerogels were obtained by freeze-drying technology. The results showed that cellulose aerogel had porous network structure. Freeze-drying method was an effective way to prepare cellulose aerogel, and the volume shrinkage was 20.41%-28.36%. Bulk cellulose aerogel had low density, high porosity and fine mechanical strength. The density was low to 0.233g/cm³, and the porosity was up to 84.88%. The compressive strength was 5.7-8.2MPa. Cellulose aerogel had good heat insulation performance and thermal conductivity could be as low as 0.029 W/ (m·K). This work provided a foundation for the possibility of applying cellulose aerogels in the insulating material field.

• Periodical: Advanced Materials Research (Volume 773)
• Pages: 487-491
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.773.487
• Online since: September 2013
• Authors: Jian Jun Shi, Ling Bin Lu, Jing Ying Zhang
• Keywords: Cellulose Aerogel, Density, Heat Insulation Performance, Porosity

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