Performance of Nano-Silica Insulation Material Enhanced by High Humidity-Reinforcement Method

S.C. Zhang; Yu Feng Chen; Wei Wu; H.R. Sun; Guang Hai Wang; Xian Kai Sun; Kai Fang; Feng Zhang

doi:10.4028/www.scientific.net/KEM.697.433

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 697Performance of Nano-Silica Insulation Material...

Performance of Nano-Silica Insulation Material Enhanced by High Humidity-Reinforcement Method

Abstract:

In this paper, fumed nano-silica as the main raw material, nano-silica insulation materials were prepared by the dry processing. Research on humidity-reinforcement of nano-Silica insulation materials has been carried out and analyzed. When hygroscopicity of samples reach to 23%, the compressive strength 1.65MPa is at twice the one without high humidity-reinforcement, while the thermal conductivities are almost the same. Then, the action mechanism of high humidity-reinforcement method was analyzed. In humidity-reinforcement method, as vapor enters, silica sol is formed in the gap between one aggregate particle and another, and various condensation polymerization occurred in the drying process, which lead to aggregates connection and compressive strength improvement.

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Periodical:

Key Engineering Materials (Volume 697)

Pages:

433-436

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.697.433

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Online since:

July 2016

Authors:

S.C. Zhang*, Yu Feng Chen, Wei Wu, H.R. Sun, Guang Hai Wang, Xian Kai Sun, Kai Fang, Feng Zhang

Keywords:

Humidity-Reinforcement, Nanosilica

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