Open AccessPreparation of carbon/silica composite aerogel and application of fire insulation
Author(s) -
Dehao Fang,
Yan He
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1885/3/032053
Subject(s) - aerogel , materials science , tetraethyl orthosilicate , composite material , composite number , orthosilicate , carbon fibers , carbon nanotube , thermal decomposition , decomposition , carbon nanofiber , desorption , thermal conductivity , adsorption , thermal insulation , chemical engineering , nanotechnology , layer (electronics) , chemistry , organic chemistry , engineering
In order to improve the disadvantages of aerogel brittleness and easy structural destruction during drying, carbon/silica dual network aerogel composites were constructed by copolymerizing carboxylated carbon nanotubes and tetraethyl orthosilicate decomposition products on chitosan templates. The composites were characterized by microscopic morphology and structural properties. The results show that the bulk carbon/silica aerogel composites can be prepared by freeze-drying through the reinforcement of chitosan templates and carbon nanotubes. The N 2 adsorption and desorption curves of the composites show a type IV curve. The thermal conductivity of the material is only 0.0375 W/(m*K) at higher temperatures, which does not change much compared to that at room temperature (0.0312 W/(m*K)).