Using dilute spouting for fabrication of highly filled metal-polymer composite materials
Using dilute spouting for fabrication of highly filled metal-polymer composite materials
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DOI：
10.1016/j.powtec.2016.12.028
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发表时间：
2017-07
影响因子：
5.2
通讯作者：
E. Eichner;V. Salikov;P. Bassen;S. Heinrich;G. Schneider
中科院分区：
文献类型：
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作者：
E. Eichner;V. Salikov;P. Bassen;S. Heinrich;G. Schneider
这一贡献涉及喷动床过程用于结合颗粒和聚合物基体，以制造高度填充的复合材料。将讨论喷动床如何用于处理微米级颗粒的问题，以及用于此目的的设备的外观，以及细颗粒的流动状态。考虑到制备的复合材料的机械性能，喷动床造粒过程的关键要求是沉积在颗粒上的聚合物层的连续性。为了评估这种性质，使用导电铜颗粒和组装的复合材料的电阻率的测量。与压实的纯铜颗粒相比，所生产的复合材料的电阻率上升了高达15个数量级。该材料在高达约74体积%的非常高的填充度下保持绝缘体铜。结果表明，喷动床具有在微米级颗粒上沉积均匀薄层的优异性能。填充度的进一步增加导致复合材料的电阻率和力学性能，如强度和弹性模量的强烈退化。
This contribution deals with a spouted bed process used for combining of particles and a polymer matrix in order to fabricate highly filled composite materials. The questions how a spouted bed can be used for processing of μm-sized particles and how the apparatus for this aim looks like will be addressed, as well as the flow regime of fine particles will be described. Regarding the mechanical properties of fabricated composite materials the key requirement for the granulation procedure in spouted bed is the continuity of the polymer layers deposited on particles. To evaluate this property electrically conducting copper particles and measurements of electrical resistivity of assembled composite materials were used. The resistivity of produced composite materials rises by up to 15 orders of magnitude in comparison to the compacted pure copper particles. The material remains an insulator up to a very high filling degree of about 74 vol.% of copper. The results show an outstanding capacity of a spouted bed for deposition of uniform thin coating layers on μm-sized particles. Further increase of filling degrees leads to a strong degradation of both the electrical resistivity and mechanical properties of composite, such as strength and elastic modulus.