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Journal of Porous Materials

, Volume 25, Issue 6, pp 1697–1705 | Cite as

Opacified graphene-doped silica aerogels with controllable thermal conductivity

  • Jiayi Zhu
  • Hongbo Ren
  • Yutie Bi
Article

Abstract

In this work, we developed a new type of thermal insulation materials by combining the silica aerogel (SiO2) and graphene (G) followed by aging and supercritical drying. The effects of different G/SiO2 mass ratios on the microstructures and properties of opacified G/SiO2-x composite aerogels were investigated. The results showed that the graphene was well-distributed in the SiO2 matrix. Meanwhile, the opacified composite aerogels showed high-specific surface area (~ 1000 m2/g). Due to the unique bandgap feature and conjugated large π bond of graphene, the thermal insulation property of G/SiO2-x composite aerogels was enhanced in contrast with the pure SiO2 aerogel. Moreover, a possible mechanism of heat transfer was discussed to interpret the result.

Keywords

Silica aerogel Graphene Composite aerogel Thermal conductivity Thermal insulation 

Notes

Acknowledgements

This study was funded by the National Natural Science Foundation of China (Grant No. 51502274) and the Doctoral Research Fund of Southwest University of Science and Technology (Nos. 15zx7137, 16zx7142).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict interest.

Supplementary material

10934_2018_583_MOESM1_ESM.doc (106 kb)
Supplementary material 1 (DOC 106 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Functional Structure Material LaboratorySouthwest University of Science and TechnologyMianyangPeople’s Republic of China
  2. 2.Joint Laboratory for Extreme Conditions Matter PropertiesSouthwest University of Science and Technology and Research Center of Laser FusionMianyangPeople’s Republic of China

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