Journal
CARBOHYDRATE POLYMERS
Volume 266, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2021.118130
Keywords
Cellulose; Chitosan; Pectin; Alginate; Starch; Thermal conductivity; Thermal insulation; Density; Specific surface area
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Thermal insulation is a hot topic in current research, with aerogels being the only known materials with thermal superinsulating properties. However, there may be bottlenecks in the performance and development of bio-aerogels as thermal insulation materials.
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 center dot 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 center dot K)). The classical thermal superinsulating aerogels are based on silica and some synthetic polymers, with conductivity 0.014-0.018 W/(m center dot 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.
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