Triboelectric Charging of Granular Insulator Mixtures Due Solely to Particle−Particle Interactions
Triboelectric Charging of Granular Insulator Mixtures Due Solely to Particle−Particle Interactions
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DOI：
10.1021/ie8004786
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发表时间：
2009-03
影响因子：
4.2
通讯作者：
Keith M. Forward;D. Lacks;R. M. Sankaran
中科院分区：
文献类型：
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作者：
Keith M. Forward;D. Lacks;R. M. Sankaran
摩擦带电在颗粒系统中被广泛观察到，但这种现象背后的物理学还没有得到很好的理解。摩擦电充电实验研究的一个关键挑战是获得可重复的数据，可以链接到理论预测。为此，我们开发和执行实验上的摩擦带电的颗粒混合物具有不同的组成。已经构建了在低真空（70 Torr）下操作的台式颗粒流装置;在清洁和受控的环境中进行实验减少了由污染物、湿度等引起的对充电的影响。无粒子-壁相互作用）。采用非接触式测量电荷的方法来限制探针-粒子充电（或放电）。时间依赖性和稳态行为进行了研究。各种颗粒绝缘体材料进行了研究，以调查系统组成的影响。
Triboelectric charging is widely observed in granular systems, but the physics underlying the phenomenon is not well understood. A critical challenge for experimental studies of triboelectric charging is to obtain reproducible data that can be linked to theoretical predictions. Toward this end, we develop and perform experiments on the triboelectric charging of granular mixtures with varying composition. A benchtop particle flow apparatus has been constructed that operates under low vacuum (70 Torr); performing experiments in a clean and controlled environment reduces the effects on charging caused by contaminates, humidity, etc. The apparatus is designed such that only particle−particle interactions occur (i.e., no particle−wall interactions). A noncontact method of measuring charge is employed to limit probe−particle charging (or discharging). Both time-dependent and steady-state behaviors are investigated. Various granular insulator materials are studied to investigate the effect of system composition ...