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首页> 外文期刊>RSC Advances >Improved electrical conductivity of PDMS/SCF composite sheets with bolting cloth prepared by a spatial confining forced network assembly method
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Improved electrical conductivity of PDMS/SCF composite sheets with bolting cloth prepared by a spatial confining forced network assembly method

机译：通过空间约束强制网络组装法制备的带螺栓的布改善PDMS / SCF复合板的电导率

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A novel method of Spatial Confining Forced Network Assembly (SCFNA) for preparation of high-performance electrically conductive polymeric composites was proposed in this paper. Differing from the self-assembly mechanism, as in traditional compounding processes, the SCFNA process could provide conductive fillers with an effective forced networking assembly action to get a more compacted network. High electro-conductive polydimethylsiloxane (PDMS)/short carbon fiber (SCF) binary composites with a low percolation threshold of 0.15 wt% were prepared by the SCFNA method. A rapid increase in electrical conductivity from 1.71 × 10?12 S m?1 of PDMS to 1.67 × 102 S m?1 was achieved with 4 wt% short carbon fibers. It was shown that a continuous and compact SCF network was built in a PDMS matrix. Furthermore, when the bolting cloth as a sarking was co-compressed with the mixture, a much lower percolation threshold of 0.06 wt% and a higher electrical conductivity of 3.22 × 102 S m?1 with 4 wt% of SCF were obtained due to volume exclusion. Compared with the conventional compounding method, the electro-conductive properties of the composites prepared by the above mentioned method can be enhanced up to several times, or even by orders of magnitudes. Moreover, if the mesh number of the bolting cloth is large enough, the carbon fibers will be impeded from penetrating the bolting cloth together with the polymer when they are co-compressed, thus an electrically conductive film with single or double insulating face could be prepared through this method.
机译：本文提出了一种新型的空间约束强制网络组件（SCFNA）制备高性能导电聚合物复合材料的方法。与传统的复合工艺不同，SCFNA工艺与自组装机制不同，它可以为导电填料提供有效的强制联网组装作用，从而获得更紧凑的网络。通过SCFNA方法制备了低渗透阈值为0.15 wt％的高导电聚二甲基硅氧烷（PDMS）/短碳纤维（SCF）二元复合材料。电导率从PDMS的1.71×10 ？12 S m ？1 迅速增加到1.67×10用4 wt％的短碳纤维获得了 2 S m ？1 。结果表明，在PDMS矩阵中建立了一个连续而紧凑的SCF网络。此外，当锚固布作为混合物与混合物一起压缩时，其渗透阈值低得多，为0.06 wt％，而电导率较高，为3.22×10 2 通过体积排阻获得具有4wt％的SCF的S m α1 。与常规的配混方法相比，通过上述方法制备的复合材料的导电性能可以提高多达几倍，甚至提高几个数量级。此外，如果螺栓布的网眼数足够大，则当碳纤维被共同压缩时，将阻止碳纤维与聚合物一起穿透螺栓布，因此可以制备具有单绝缘面或双绝缘面的导电膜。通过这种方法。

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