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Mechanical reinforced fiber needle felt/silica aerogel composite with its flammability

  • Original Paper: Nano- and macroporous materials (aerogels, xerogels, cryogels, etc.)
  • Published:
Journal of Sol-Gel Science and Technology Aims and scope Submit manuscript

Abstract

Fiber needle felt–silica aerogel composite was successfully prepared by via sol–gel process based on water glass. The thermal conductivity show V-type variation tendency with the increase of water to Si. Thermogravimetric analysis-differential scanning calorimetry analysis revealed that the thermal stability was up to approximately 390.58 °C. It has been found that the fire hazard of the composites decreased with the increased ratio of water to Si according to the cone calorimeter test, which can be characterized by peak heat release rate, fire performance index, and fire growth rate index. The fiber needle felt/aerogels present greatly improved compressive and flexural strength (elastic modulus: 0.1–0.97 MPa; flexural modulus: 0.33–0.66 MPa) while keeping inherent properties of pure silica aerogel: low bulk density (0.166 g/cm3), low thermal conductivity of 0.0236 W/m·K, and high specific surface area (1091.62 m2/g). As a result, the as-prepared composite shows a great potential to be applied in the thermal insulation field.

Highlights

  • Fiber needle felt reinforced silica aerogel were obtained under ambient pressure.

  • The water glass based aerogel show high flexibility & thermal insulation ability.

  • The composites' flammable ability were studied through cone calorimeter.

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Acknowledgements

This research was financially supported by the National Key Research and Development Program of China (2017YFC0804900 and 2017YFC0804907), the Open Project Program of State Key Laboratory of Fire Science (HZ2017-KF12), and the Natural Science Foundation of China (No. 51706165).

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Authors and Affiliations

  1. School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, 430070, Wuhan, China

    Yajun Huang, Song He, Guangnan Chen, Huaming Dai & Xianfeng Chen

  2. State Key Laboratory of Fire Science, University of Science and Technology of China, Jinzhai Road 96, 230027, Hefei, Anhui, China

    Yajun Huang & Xiaojing Shi

  3. Institute of Chemical Defense Warfare, 100083, Beijing, China

    Xiaobing Yang

Authors
  1. Yajun Huang
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  2. Song He
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  3. Guangnan Chen
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  4. Xiaojing Shi
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  5. Xiaobing Yang
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  6. Huaming Dai
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  7. Xianfeng Chen
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Correspondence to Song He or Huaming Dai.

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Huang, Y., He, S., Chen, G. et al. Mechanical reinforced fiber needle felt/silica aerogel composite with its flammability. J Sol-Gel Sci Technol 88, 129–140 (2018). https://doi.org/10.1007/s10971-018-4796-6

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  • DOI: https://doi.org/10.1007/s10971-018-4796-6

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