论文标题
通过最大化聚合物填充界面的表面接触区域的聚合物复合材料中的热导率增强
Enhancement of Thermal Conductivity in Polymer Composites by Maximizing Surface-Contact Area of Polymer-Filler Interface
论文作者
论文摘要
在本文中，我们详细讨论了增强聚合物复合材料中热导率的有效方法。从数值模拟中显示，最大化填充物和聚合物之间的界面面积可显着增强复合材料中有效的导热率。我们的研究概述了两个主要事实。 （a）尽管填充物几何形状的性质在有效的导热率中起着重要作用，但我们表明，在不同几何导热率中，对于那些地表面积与体积比率高的几何形状对于那些几何形状较高。因此，与球形填充剂相比，非球形填充剂显示出很高的导热率。 （b）对于特定几何形状的填充物，通过最大化其表面积而不改变金属填充剂的体积分数，有效的导热率会增加。因此，填充和聚合物之间的界面区域在增强导热率中起着重要作用。最大化界面有助于通过金属填充剂进行更多的热量传导。因此，可以将填料材料转化为更多的表面，从而可以获得可以获得归档器聚合物之间的更多接口。还可以观察到，随着该界面面积的增加，有效的热导率的增加，从线性到对数生长。应该注意的是，要继承聚合物性能，对填充剂体积分数的上限有限制。当前的研究迈出了这一方向的重要一步。我们的结果在技术上在设计复合聚合物以进行更好的热传导方面非常重要，并且具有成本效益。这项研究还可以有效地确定导热率，从而提供了散装和表面积之间的联系。
In this article we discuss in detail the effective approaches to enhance the thermal conductivity in polymer composites. It is shown from numerical simulations that maximizing interfacial area between filler and polymer enhances very significantly the effective thermal conductivity in composites. Our study outlines two main facts. (a) Although the nature of the filler's geometry plays an important role in the effective thermal conductivity, we show that among the different geometries thermal conductivity is high for those geometries for which the ratio of surface-area to volume is high. Thus non-spherical shaped fillers show high thermal conductivity compared to the spherical fillers. (b) For fillers of a particular geometry, by maximizing its surface area without changing the volume fraction of the metallic filler, the effective thermal conductivity increases. Thus, the interfacial area between filler and polymer plays an important role in the enhancement of thermal conductivity. Maximizing interfaces facilitates more routes for heat conduction through the metallic filler. Thus filler material can be transformed to result into more surface such that more interfaces between the filer polymer can be obtained. It is also observed that as this interfacial area increases, increase in effective thermal conductivity follows from linear to the logarithmic growth. It should be noted that to inherit the polymer properties there is a restriction on the upper bound of volume fraction of the fillers. The current study bring out an important step in this direction. Our results are technologically very important in designing composite polymers for better heat conduction, and are very cost-effective. This study also provides a connection between the bulk and the surface area in effectively determination of the thermal conductivity.
