Dependence of triboelectric charging behavior on material microstructure
Dependence of triboelectric charging behavior on material microstructure
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DOI：
10.1103/physrevmaterials.1.035605
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发表时间：
2017-08
影响因子：
3.4
通讯作者：
Andrew E. Wang;Phwey S Gil;Moses Holonga;Zelal Yavuz;H. Baytekin;R. M. Sankaran;D. Lacks
中科院分区：
文献类型：
--
作者：
Andrew E. Wang;Phwey S Gil;Moses Holonga;Zelal Yavuz;H. Baytekin;R. M. Sankaran;D. Lacks
我们证明，化学性质相同的材料的微观结构的差异，可以导致不同的摩擦带电行为。在应变和未应变的聚四氟乙烯样品之间进行了接触充电实验。而电荷转移是随机的样品之间的相同的应变，当样品之一是应变，发生系统的电荷转移。通过XRD和显微拉曼光谱观察到变形后聚合物的分子水平结构没有显着变化。然而，通过分子动力学模拟、扫描电子显微镜、紫外可见光谱和肉眼观察，发现应变表面表现出跨越纳米到微米长度尺度的空隙和银纹形成。这表明材料的微观结构（空隙和银纹）可以控制材料的摩擦带电行为。
We demonstrate that differences in the microstructure of chemically identical materials can lead to distinct triboelectric charging behavior. Contact charging experiments are carried out between strained and unstrained polytetrafluoroethylene samples. Whereas charge transfer is random between samples of identical strain, when one of the samples is strained, systematic charge transfer occurs. No significant changes in the molecular-level structure of the polymer are observed by XRD and micro-Raman spectroscopy after deformation. However, the strained surfaces are found to exhibit void and craze formation spanning the nano- to micrometer length scales by molecular dynamics simulations, SEM, UV-vis spectroscopy, and naked-eye observations. This suggests that material microstructure (voids and crazes) can govern the triboelectric charging behavior of materials.