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首页> 外文期刊>Journal of Sol-Gel Science and Technology >Engineering thermal and mechanical properties of flexible fiber-reinforced aerogel composites
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Engineering thermal and mechanical properties of flexible fiber-reinforced aerogel composites

机译：柔性纤维增强气凝胶复合材料的工程热力学性能

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摘要

Flexible aerogel was successfully supported onto 4-layer-aligned glass fibers through impregnation, followed by drying at atmospheric pressure. The prepared nanocomposites can achieve a low thermal conductivity of 0.026 W/(m·K), which holds great promising for their use in thermal insulation applications. By choosing different designs of the four fiber layers, in the terms of LLLL, LTLL, LLTT, LTLT, LTTL and LTTT, the laminated structures of aerogel composites can be accordingly controlled. Further microstructure characterization of the composites revealed the homogeneous dispersion of nanoporous structure through the aerogel matrix, as well as highly-aligned fibers to reinforce the structure. Detailed investigation on the thermal and mechanical properties of the prepared fiber-aerogel composites showed that their performances were highly related to the laminated design of fiber layers. The introduction of fibers as the backbone of the aerogel and the suitable design of their laminated structure can greatly improve the mechanical properties of the aerogel composites while maintaining a low thermal conductivity.
机译：通过浸渍将柔性气凝胶成功地支撑在4层排列的玻璃纤维上，然后在大气压下干燥。制备的纳米复合材料可实现0.026 W /（m·K）的低导热率，这在其绝热应用中具有很大的应用前景。通过在LLLL，LTLL，LLTT，LTLT，LTTL和LTTT方面选择四种纤维层的不同设计，可以相应地控制气凝胶复合材料的层压结构。复合材料的进一步微观结构表征表明，纳米多孔结构通过气凝胶基质均匀分散，并且通过高取向纤维增强了结构。对制备的纤维-气凝胶复合材料的热和机械性能的详细研究表明，它们的性能与纤维层的层压设计高度相关。引入纤维作为气凝胶的主干并对其层压结构进行适当的设计可以在保持低导热率的同时极大地改善气凝胶复合材料的机械性能。

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