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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and thermal conductivity of novolac/Ni/graphite nanosheet composites
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Preparation and thermal conductivity of novolac/Ni/graphite nanosheet composites

机译：线型酚醛/镍/石墨纳米片复合材料的制备及导热性能

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摘要

A high thermal conductivity novolacickel/graphite nanosheet (novolac/Ni/NanoG) composite was synthesized through in situ polymerization. Graphite nanosheet (NanoG) was prepared by sonicating expanded graphite (EG) in an aqueous alcohol solution and was plated with nickel through an electrodeposition method. The X-ray diffraction spectrum shows that nickel was successfully plated onto the graphite surface and the nickel thickness is about 27.89 nm. The microstructures of the Ni/NanoG were characterized by scanning electron microscopy and transmission electron microscopy. The results reveal that nickel particles with the average diameter of 25 nm are coated on NanoG surface homogeneously and densely. Energy dispersive spectrometry spectrum confirms that the Ni content coated on NanoG surface, whose atomic percentage is 61%, is much higher than that of C element. The values predicted by theoretical model were underestimated the thermal conductivity of novolac/Ni/NanoG composites. Among NG, EG, NanoG, and Ni/NanoG four kinds of particles, the Ni/NanoG improved the thermal conductivity of novolac resin significantly.
机译：通过原位聚合合成了高导热率的线型酚醛清漆/镍/石墨纳米片（novolac / Ni / NanoG）复合材料。石墨纳米片（NanoG）是通过在乙醇水溶液中超声处理膨胀石墨（EG）制备的，并通过电沉积方法镀镍。 X射线衍射光谱表明镍成功地镀在石墨表面上，镍的厚度约为27.89nm。 Ni / NanoG的微观结构通过扫描电子显微镜和透射电子显微镜表征。结果表明，平均直径为25 nm的镍颗粒均匀而致密地涂覆在NanoG表面上。能量色散光谱图证实，原子百分比为61％的NanoG表面涂层的Ni含量远高于C元素。理论模型预测的值低估了线型酚醛树脂/ Ni / NanoG复合材料的热导率。在NG，EG，NanoG和Ni / NanoG四种颗粒中，Ni / NanoG显着提高了酚醛清漆树脂的导热性。

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