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Effects of the Heat Treatment in the Properties of Fibrous Aerogel Thermal Insulation

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  • Ákos Lakatos

    (Department of Building Services and Building Engineering, Faculty of Engineering, University of Debrecen, Ótemető str 2-4 1, 4028 Debrecen, Hungary)

  • Attila Csík

    (Institute for Nuclear Research, Hungarian Academy of Sciences, Bem tér 18/c, 4026 Debrecen, Hungary)

  • Anton Trník

    (Department of Physics, Faculty of Natural Sciences, Constantine the Philosopher University in Nitra, Tr. A Hlinku 1, 94974 Nitra, Slovakia
    Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 16629 Prague, Czech Republic)

  • István Budai

    (Department of Engineering Management and Enterprise, Faculty of Engineering, University of Debrecen, Ótemető str 2-4, 4028 Debrecen, Hungary)

Abstract

Nowadays, besides the use of conventional insulations (plastic foams and wool materials), aerogels are one of the most promising thermal insulation materials. As one of the lightest solid materials available today, aerogels are manufactured through the combination of a polymer with a solvent, forming a gel. For buildings, the fiber-reinforced types are mainly used. In this paper, the changes both in the thermal performance and the material structure of the aerogel blanket are followed after thermal annealing. The samples are put under isothermal heat treatments at 70 °C for weeks, as well as at higher temperatures (up to 210 °C) for one day. The changes in the sorption properties that result from the annealing are presented. Furthermore, the changes in the thermal conductivity are followed by a Holometrix Lambda heat flow meter. The changes in the structure and surface of the material due to the heat treatment are investigated by X-ray diffraction and with scanning electron microscopy. Besides, the above-mentioned measurement results of differential scanning calorimetry experiments are also presented. As a result of using equipment from different laboratories that support each other, we found that the samples go through structural changes after undergoing thermal annealing. We manifested that the aerogel granules separate down from the glass fibers and grow up. This phenomenon might be responsible for the change in the thermal conductivity of the samples.

Suggested Citation

  • Ákos Lakatos & Attila Csík & Anton Trník & István Budai, 2019. "Effects of the Heat Treatment in the Properties of Fibrous Aerogel Thermal Insulation," Energies, MDPI, vol. 12(10), pages 1-12, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:10:p:2001-:d:234222
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    References listed on IDEAS

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    1. Cuce, Erdem & Cuce, Pinar Mert & Wood, Christopher J. & Riffat, Saffa B., 2014. "Toward aerogel based thermal superinsulation in buildings: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 34(C), pages 273-299.
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    Cited by:

    1. Ákos Lakatos & Anton Trník, 2020. "Thermal Diffusion in Fibrous Aerogel Blankets," Energies, MDPI, vol. 13(4), pages 1-9, February.

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