Multifunctional and recyclable aerogel/fiber building insulation composites with sandwich structure

Lv, Qingtao; Zhu, Xueying; Zhou, Tianyi; Tian, Lijuan; Liu, Yawen; Wang, Yudan; Zhang, Chunhong

doi:10.1016/j.conbuildmat.2024.135902

Cited by 3 publications

(1 citation statement)

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“…Silica aerogel is considered to be an important solid material [1,2] for its lightweight and low thermal conductivity, and is regarded as a promising insulation material. However, pure silica aerogels suffer the disadvantages of brittleness and infrared transmittance [3], resulting in difficulties in maintaining their structural integrity and high-intensity radiation heat transfer under high-temperature circumstances.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Reinforced Fibers and Opacifiers on the Effective Thermal Conductivity of Silica Aerogels

Huang,

Li,

Gong

et al. 2024

Gels

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Fiber–particle-reinforced silica aerogels are widely applied in thermal insulation. Knowing their effective thermal conductivity (ETC) and radiative characteristics under high temperatures is necessary to improve their performance. This article first analyzes the radiation characteristics of silica aerogels doped with opacifier particles and reinforced fibers, and then a universal model is established to predict the ETC. Furthermore, the impacts of different parameters of opacifier particles and reinforced fibers on the thermal insulation performance of silica aerogels are investigated. The results indicate that SiC exhibits comparatively strong absorption characteristics, making it a good alternative for opacifiers to improve thermal insulation performance under high temperatures. For the given type and volume fraction of opacifier particles, there exists an optimal diameter and volume fraction to achieve the best insulation performance of silica aerogel under a certain temperature. Considering that SiO2 fibers exhibit a limited extinction capability and higher conductive thermal conductivity under high temperatures, for fiber–particle-reinforced silica aerogels, it is beneficial for their insulation performance to reduce the fiber volume fraction when the required mechanical properties are satisfied.

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Section: Introductionmentioning

confidence: 99%