Manipulating nanostructure assemblies is important in using them as structural and functional materials. Carbon nanotubes (CNTs) lack the ability to reconstruct their entangled network. In this work, we report a strategy with which to realize efficient manipulation of CNT networks by forming double networks with branched polyethylenimine (PEI). The double network was highly viscoelastic and ductile and enabled efficient film stretching or creeping for CNT alignment, which dramatically improved the mechanical strength of the CNT films. Due to the viscous drag from the polymer network, the CNTs showed enhanced movability in reconstructing new networks, which made the film repairable. The repairability resulted from the branched polymeric structure. This double-networking strategy provides a new way to manipulate CNT assemblies for high-performance applications.

操纵纳米结构组件对于将其用作结构和功能材料非常重要。碳纳米管（CNT）缺乏重建其纠缠网络的能力。在这项工作中，我们报告了一种通过与支化聚乙烯亚胺（PEI）形成双网络来实现对CNT网络的有效操纵的策略。双网络具有高粘弹性和延展性，能够实现有效的薄膜拉伸或蠕变以实现碳纳米管排列，从而显着提高碳纳米管薄膜的机械强度。由于聚合物网络的粘性阻力，碳纳米管在重建新网络时表现出增强的可移动性，这使得薄膜可修复。可修复性源于支化聚合结构。