Liu, C. Z. Preparation and properties of polyimide aerogel-aramid fiber composites. Polym. Bull. (in Chinese), 2025, 38(5), 801–807. DOI: 10.14028/j.cnki.1003-3726.2025.24.375.
Preparation and Properties of Polyimide Aerogel-aramid Fiber Composites
Polyimide (PI) aerogel is an organic polymer-based aerogel with good thermal insulation properties
which has received increasing attention. In order to construct a composite material with good thermal insulation properties
in this study
the PI aerogel-aramid fiber composite thermal insulation material was prepared by first molding and freezing
followed by drying-softening treatment
using aramid fiber
a polymer material
as the matrix material and PI aerogel as the reinforcing filler. The mechanical and thermal insulation properties of the composites were investigated separately
and it was found that the thermal conductivity of the composites decreased from 0.047 W/(m·K) to 0.031 W/(m·K)
which was reduced by 34.04%
after the introduction of PI; and its mechanical strength was increased from 736 kPa to 798 kPa
which was enhanced by 8.42%. In addition
the PI aerogel-aramid fiber composite insulation improved the thermal comfort of the wearer in hot and humid environments
indicating that the composite is particularly suitable for thermal insulation applications.
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