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Polysaccharide-based aerogels for thermal insulation and superinsulation: An overview.
- Source :
-
Carbohydrate Polymers . Aug2021, Vol. 266, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- To reduce energy losses due to the insufficient thermal insulation is one of the current "hot" topics. Various commercial porous materials are used with the best conductivity around 0.03–0.04 W/(m·K). Aerogels are the only known materials with "intrinsic" thermal superinsulating properties, i.e. with thermal conductivity below that of air in ambient conditions (0.025 W/(m·K)). The classical thermal superinsulating aerogels are based on silica and some synthetic polymers, with conductivity 0.014–0.018 W/(m·K). Aerogels based on natural polymers are new materials created at the beginning of the 21st century. Can bio-aerogels possess thermal superinsulating properties? What are the bottlenecks in the development of bio-aerogels as new high-performance thermal insulationing materials? We try to answer these questions by analyzing thermal conductivity of bio-aerogels reported in literature. • Thermal conductivity of bio-aerogels is analysed. • Correlations between thermal conductivity and aerogel density and surface area are built. • A special focus is made on thermal conductivity below that of air. • Prospects of using bio-aerogels for thermal insulation are discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01448617
- Volume :
- 266
- Database :
- Academic Search Index
- Journal :
- Carbohydrate Polymers
- Publication Type :
- Academic Journal
- Accession number :
- 150466675
- Full Text :
- https://doi.org/10.1016/j.carbpol.2021.118130