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首页> 外文期刊>Journal of Applied Polymer Science >Thermal Conductivity of Filled Sol-Gel-Derived Hybrid Materials
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Thermal Conductivity of Filled Sol-Gel-Derived Hybrid Materials

机译：填充溶胶-凝胶衍生的杂化材料的导热系数

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摘要

A novel sol-gel-based hybrid material has been synthesized from organofunctional silanes and aluminates via hydrolysis and condensation reactions. The hybrid material was-in comparison to a silicone rubber-filled with equal amounts of metal filler particles in order to investigate the effective thermal conductivity. The data obtained were compared with theoretical models available in literature to gain understanding of mechanisms responsible for the measured conductivities. Samples were prepared via casting and spin-coating techniques on TeflonVR and silicon substrates and characterized using laser flash analysis (LFA) and scanning electron microscopy (SEM). It was demonstrated, that the hybrid material with an aluminum content of 40 vol % offers the possibility to achieve an up to five times higher thermal conductivity than filled silicone references. The influence of thermal transition between matrix material and filler was evaluated by a sandwich-layer setup. The results suggest that increased thermal conductivity is also caused by the lower thermal resistance and improved interphase connections within the hybrid material. VC 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41037.
机译：一种新的基于溶胶-凝胶的杂化材料已经通过水解和缩合反应由有机官能硅烷和铝酸盐合成。为了研究有效的热导率，混合材料与填充了等量金属填料颗粒的硅橡胶相比。将获得的数据与文献中可用的理论模型进行比较，以了解负责测量电导率的机理。通过流延和旋涂技术在TeflonVR和硅基板上制备样品，并使用激光闪光分析（LFA）和扫描电子显微镜（SEM）对其进行表征。事实证明，铝含量为40％（体积）的杂化材料可以提供比填充的有机硅参考材料高出五倍的导热率。通过夹心层设置评估了基质材料和填料之间的热转变影响。结果表明，热导率的提高也是由于杂化材料内较低的热阻和改善的相间连接而引起的。 VC 2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2014，131，41037。

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