Stretchable conductive polymer composites are important in the field of flexible electronic devices, in which stretchable conductive silicone rubber composites has drawn great attention. However, the poor mechanical properties of the SR composites limit their practical application. How to compensate this drawback without compromising its electrical conductivity is an issue deserved to investigate. Herein, conductive carbon black grafted with a silicone coupling agent was prepared by free radical polymerization, and further reacted with carbon nanotube to obtain a new carbon black-carbon nanotube hybrid filler. This hybrid filler can not only improve the mechanical properties of silicone rubber composites, but also greatly enhance their electrical conductivity. Consequently, a silicone rubber composite with 5.76 vol% hybrid filler has high tensile strength (4.5 MPa) and elongation at break (211%). The minimum conductive percolation threshold and maximum conductivity of the composite are 0.24 vol% and 248.8 S/m, respectively. Besides, the composite has high strain sensitivity and superior deformation recovery performance, and can be applied to detect human motion behavior under a low strain. The preparation method of the hybrid filler provides a novel approach to the preparation and production of stretchable conductive composites with good mechanical properties and potential application for flexible electronic devices.

可拉伸的导电聚合物复合材料在柔性电子设备领域很重要，其中可拉伸的导电硅橡胶复合材料引起了极大的关注。然而，SR复合材料的差的机械性能限制了它们的实际应用。如何在不损害其导电性的情况下弥补这一缺点是值得研究的问题。在此，通过自由基聚合制备接枝有硅氧烷偶联剂的导电炭黑，并使其与碳纳米管反应，得到新的炭黑-炭纳米管杂化填料。这种杂化填料不仅可以改善硅橡胶复合材料的机械性能，而且可以大大提高其导电性。因此，硅橡胶复合物具有5。76体积％的混合填料具有较高的抗张强度（4.5 MPa）和断裂伸长率（211％）。该复合材料的最小导电渗透阈值和最大导电率分别为0.24vol％和248.8S / m。此外，该复合材料具有较高的应变敏感性和优异的变形恢复性能，可用于检测低应变下的人体运动行为。杂化填料的制备方法为制备和生产可拉伸的导电复合材料提供了一种新颖的方法，该复合材料具有良好的机械性能，并有望应用于柔性电子设备。该复合材料具有较高的应变敏感性和优异的变形恢复性能，可用于检测低应变下的人体运动行为。杂化填料的制备方法为制备和生产可拉伸的导电复合材料提供了一种新颖的方法，该复合材料具有良好的机械性能，并有望应用于柔性电子设备。该复合材料具有较高的应变敏感性和优异的变形恢复性能，可用于检测低应变下的人体运动行为。杂化填料的制备方法为制备和生产可拉伸的导电复合材料提供了一种新颖的方法，该复合材料具有良好的机械性能，并有望应用于柔性电子设备。