Journal of Porous Materials

, Volume 27, Issue 1, pp 295–301 | Cite as

Synthesis of hydrophobic silica aerogel and its composite using functional precursor

  • Jiayue Zhang
  • Yong KongEmail author
  • Xing Jiang
  • Ya Zhong
  • Ying Chen
  • Xiaodong Shen


Hydrophobic silica aerogel (HSA) was synthesized by a facile sol–gel method and ambient pressure drying with methyltrimethoxysilane as precursor. The effect of precursor concentration on the sol–gel behavior, structure, and thermal conductivity of HSA was investigated. HSA with apparent density of 0.088 g/cm3 showed a thermal conductivity of 0.018 W/(m·K), a specific surface area of 502 m2/g and a pore volume of 1.66 cm3/g. The hydrophobic groups in HSA had a good thermal stability up to 450 °C. Polypropylene felt was used to synthesize hydrophobic silica aerogel composite (HSAC). The effect of sol loading on the structure and thermal conductivity of HSAC was investigated. HSAC with equivalent sol loading exhibited a low shrinkage of 2.5% and a low thermal conductivity of 0.020 W/(m·K). Finally, the preparation method of the HSA is facile and environmentally friendly, and the resulting composite is a promising candidate for thermal insulation under humid environments.


Aerogel Hydrophobic Thermal insulation Composite 



The authors acknowledge the supports from the National Natural Science Foundation of China (51602151, 51702156), the Natural Science Foundation of Jiangsu Province - China (BK20161003, BK20161002), the Priority Academic Program Development of Jiangsu Higher Education Institution (PAPD) - China, and the Project funded by China Postdoctoral Science Foundation (2018T110490, 2018M642228).


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Materials Science and EngineeringNanjing Tech UniversityNanjingPeople’s Republic of China

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