DUAL MECHANISM FOR METAL-POLYMER CONTACT ELECTRIFICATION
DUAL MECHANISM FOR METAL-POLYMER CONTACT ELECTRIFICATION
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DOI：
10.1016/0304-3886(94)90026-4
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发表时间：
1994-01-01
影响因子：
1.8
通讯作者：
LEE, LH
中科院分区：
文献类型：
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作者：
LEE, LH
接触充电和摩擦起电被认为是由瞬时成键和瞬时断键组成的非平衡两步过程。我们提出的金属-聚合物接触电气化的双重机制概念是基于电子（或空穴）作为供体-受体络合物形成中的电荷载流子的共存模型，该模型涉及两个术语：库仑或静电和前沿轨道或电荷转移。前者是远距离离子，后者是短距离（小于或等于4埃）电子。因此，对于成键步骤，离子和电子传递机制作为一个连续体涉及。在键断步骤中，Dickinson发现空气击穿和键断伴随着电子发射（EE）和正离子发射（PIE）。最近，Sakaguchi和Kashiwabara发现了一个类似的摩擦电气化断键的双重机制，涉及机械和机械。因此，我们关于金属和聚合物之间接触通电的双重机制的概念与两步非平衡过程是一致的，这一概念可能有助于理解一些关于接触充电和电荷积累的未解之谜。
Contact charging and triboelectrification are considered a non-equilibrium two-step process consisting of instantaneous bond-forming and bond-breaking. Our proposed concept of a dual mechanism for metal-polymer contact electrification is based on a coexistence model with electrons (or holes) as charge carriers in the formation of a donor-acceptor complex which involves two terms: Coulombic or electrostatic and frontier orbital or charge transfer. The former is long-range and ionic, while the latter is short range (less-than-or-equal-to 4 angstrom) and electronic. Therefore, for the bond-forming step, both ionic and electronic transfer mechanisms are involved as in a continuum. For the bond-breaking step, air breakdown and bond fracture have been found by Dickinson to be accompanied by the electron emission (EE) and positive ion emission (PIE). Recently, a similar dual mechanism of bond-breaking for frictional electrification has been shown by Sakaguchi and Kashiwabara to involve both mechanoradicals and mechanoions. Thus, our concept of a dual mechanism for contact electrification between metal and polymer is consistent with the two-step non-equilibrium process, and this concept may be applied to help understand some unanswered questions about contact charging and charge accumulation.