Electrically Conductive Carbon Black/Poly(Ethylene Terephthalate)/Polyethylene Microfibrillar Composite: The influence of CaCO3 Nanoparticles
Electrically Conductive Carbon Black/Poly(Ethylene Terephthalate)/Polyethylene Microfibrillar Composite: The influence of CaCO3 Nanoparticles
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DOI：
10.1080/03602550802131383
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发表时间：
2008-06
影响因子：
--
通讯作者：
Bo Li;Zhong‐Ming Li;Xiang-Bin Xu
中科院分区：
文献类型：
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作者：
Bo Li;Zhong‐Ming Li;Xiang-Bin Xu
讨论了复合填料体系对微纤导电聚合物复合材料（MCPC）电性能的影响。通过向炭黑（CB）填充的MCPC中添加绝缘填料纳米CaCO 3，根据CB/纳米CaCO 3的比例来调整聚对苯二甲酸乙二醇酯（PET）微纤相的形态，从而调整MCPC的电性能。结果表明，纳米CaCO_3对电性能的影响不是单调的。随着纳米CaCO 3含量的增加，一方面，微纤维表面变得更加光滑，这损害了MCPC的导电性。同时，纳米CaCO 3颗粒取代了微纤维表面的CB颗粒，进一步降低了电导率。另一方面，可以形成更长和更好定义的微纤维，这增强了导电网络，提高了MCPC的导电性。因此，与普通CB填充MCPC相比，渗流阈值变化不大。
The influence of a complex filler system on the electrical properties of a microfibrillar conductive polymer composite (MCPC) is discussed. By adding insulating filler, nano-CaCO3, to carbon black (CB)-filled MCPC, the morphology of the poly(ethylene terephthalate) (PET) microfibrillar phase was tailored according to the ratio of CB/nano-CaCO3, and so were the electrical properties of MCPC. It was found that nano-CaCO3 did not influence electrical properties in a monotone way. With an increase in nano-CaCO3 content, on one hand, the surface of the microfibrils became smoother, which jeopardized the conductivity of the MCPC. At the same time, the nano-CaCO3 particles substituted for the CB particles on the surface of the microfibrils and further decreased conductivity. On the other hand, longer and better-defined microfibrils could form, which enhanced the conductive network and increased the conductivity of the MCPC. As a result, the percolation threshold changed little compared to the common CB-filled MCPC.