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Mechanical, thermal, and hydrophobic properties of silica aerogel-epoxy composites

机译:二氧化硅气凝胶 - 环氧复合材料的机械,热和疏水性能

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摘要

Epoxy composites were prepared with different contents of hydrophobic silica aerogel particles to investigate their mechanical, thermal, and hydrophobic properties. The composites, particularly the one containing 1 wt % silica aerogel, showed remarkable toughness and yielding behaviors compared to neat epoxy, with its brittle behavior. As the content of silica aerogel increased, the thermal properties of the composites (e.g., thermal conductivity and thermal stability) improved. This was due to the very low thermal conductivity and high thermal stability of the silica aerogel particles. Moreover, the use of the hydrophobic silica aerogel led to the development of composites with hydrophobic properties. To examine the hydrophobicity more deeply, a series of water-uptake tests were performed, and the results show that the composite with 3 wt % silica aerogel absorbed 50% less water than the neat epoxy. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45706.
机译:用不同含量的疏水性二氧化硅气体颗粒制备环氧复合材料,以研究其机械,热和疏水性。 与整齐的环氧树脂相比,复合材料,特别是含有1wt%二氧化硅气凝胶的韧性,其易韧性和产生的行为。 随着二氧化硅气凝胶的含量增加,复合材料的热性能(例如,导热率和热稳定性)改善。 这是由于硅气凝胶颗粒的热导电率和高热稳定性是原因。 此外,疏水性二氧化硅气凝胶的用途导致具有疏水性质的复合材料的开发。 为了更深入地检查疏水性,进行一系列的采访试验,结果表明,具有3wt%二氧化硅气凝胶的复合材料比整个环氧树脂吸收50%的水。 (c)2017 Wiley期刊,Inc.J.Phill。 聚合物。 SCI。 2018,135,45706。

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