Alternating electric field induced agglomeration of carbon black filled resins
Alternating electric field induced agglomeration of carbon black filled resins
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DOI：
10.1016/s0032-3861(02)00084-8
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发表时间：
2002-05
期刊：
影响因子：
4.6
通讯作者：
M. Schwarz;W. Bauhofer;K. Schulte
中科院分区：
文献类型：
--
作者：
M. Schwarz;W. Bauhofer;K. Schulte
这封信报告了我们的观察，即交变电场能够诱导炭黑（CB）填充树脂中导电网络的形成，远低于零场渗透阈值。与最近提出的直流方法相比，交流团聚在两个方面效率更高：在同等条件下，它的进行速度明显快，并且在更高的离子浓度下仍然有效。与直流诱导的分枝形式的CB网络相比，交流团聚有利于平行CB链的形成。实验结果可以用基体的离子电导率以及CB粒子上的电荷和场感应偶极子来解释。
This letter reports on our observation that an alternating electric field is able to induce the formation of an electrically conducting network in carbon black (CB) filled resins well below the zero-field percolation threshold. Compared with the recently presented dc method, the ac agglomeration is more efficient in two respects: it proceeds significantly faster under equivalent conditions and is still effective at higher ionic concentration. In contrast to the ramified form of dc-induced CB networks, ac agglomeration favors the formation of parallel CB chains. The experimental results can be explained taking into account ionic conductivities of the matrices as well as charges and field induced dipoles on the CB particles.