Slobodian Petr, Riha Pavel, Olejnik Robert, Matyas Jiri
Centre of Polymer Systems, University Institute, Tomas Bata University, Tr. T. Bati 5678, 760 01 Zlin, Czech Republic.
The Czech Academy of Sciences, Institute of Hydrodynamics, Pod Patankou 5, 166 12 Prague 6, Czech Republic.
Polymers (Basel). 2020 May 1;12(5):1030. doi: 10.3390/polym12051030.
The versatile properties of a nanopaper consisting of a porous network of multi-walled carbon nanotubes were applied to enhance the mechanical and electrical properties of a thermosetting epoxy polymer. The embedded nanopaper proved useful both in the monitoring of the curing process of the epoxy resin by the self-regulating Joule heating and in the supervising of tensile deformations of the composite by detecting changes in its electrical resistance. When heated by Joule heating above its glass transition temperature, the embedded carbon nanotube nanopaper accelerated not only the modelling of the composites into various shapes, but also the shape recovery process, wherein the stress in the nanopaper was released and the shape of the composite reverted to its original configuration. Lastly, in comparison with its respective epoxy adhesive, the internally heated electro-conductive carbon nanotube nanopaper/epoxy composite not only substantially shortened curing time while retaining comparable strength of the adhesive bonding of the steel surfaces, but also enabled a release of such bonds by repeated application of DC current.
由多壁碳纳米管多孔网络组成的纳米纸的多功能特性被用于增强热固性环氧树脂聚合物的机械和电气性能。事实证明，嵌入的纳米纸不仅有助于通过自调节焦耳热监测环氧树脂的固化过程，还能通过检测复合材料电阻变化来监测其拉伸变形。当通过焦耳热加热到高于其玻璃化转变温度时，嵌入的碳纳米管纳米纸不仅加速了复合材料成型为各种形状的过程，还加速了形状恢复过程，在此过程中纳米纸中的应力得以释放，复合材料的形状恢复到其原始构型。最后，与相应的环氧粘合剂相比，内部加热的导电碳纳米管纳米纸/环氧复合材料不仅在保持钢表面粘合剂粘结强度相当的情况下大幅缩短了固化时间，还能通过重复施加直流电流实现这种粘结的分离。
