Reshapeable, rehealable and recyclable sensor fabricated by direct ink writing of conductive composites based on covalent adaptable network polymers
Reshapeable, rehealable and recyclable sensor fabricated by direct ink writing of conductive composites based on covalent adaptable network polymers
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DOI：
10.1088/2631-7990/ac37f2
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发表时间：
2022-03-01
影响因子：
14.7
通讯作者：
Yu, Kai
中科院分区：
文献类型：
--
作者：
He, Xu;Lin, Yuchen;Yu, Kai
掺杂导电纳米粒子的共价适应性网络 (CAN) 聚合物是制造可重塑、可修复和完全可回收电子产品的理想候选者。另一方面，3D 打印作为一种确定性制造方法，在制造低成本和高设计自由度的电子产品方面具有巨大潜力。在本文中，我们将由聚亚胺 CAN 和多壁碳纳米管组成的导电复合材料融入直接墨水写入 3D 打印中，以创建具有出色的重塑、修复和回收能力的聚合物传感器。所开发的可印刷油墨具有良好的印刷适性、导电性和可回收性。研究了印刷聚亚胺复合材料在不同温度和变形应变水平下的电导率。它们的形状改性和焦耳热引起的界面焊接效应得到了论证和表征。最后，温度传感器采用 3D 打印方式，具有定义的导电路径图案，可以轻松安装到 3D 表面上，在损坏后进行修复，并使用溶剂回收。印刷传感器在修复和回收后仍能保持其传感能力。总体而言，3D打印的可重塑、可修复和可回收的传感器具有复杂的几何形状并延长了使用寿命，这有助于基于聚合物的电子产品向广泛和可持续的应用方向发展。
Covalent adaptable network (CAN) polymers doped with conductive nanoparticles are an ideal candidate to create reshapeable, rehealable, and fully recyclable electronics. On the other hand, 3D printing as a deterministic manufacturing method has a significant potential to fabricate electronics with low cost and high design freedom. In this paper, we incorporate a conductive composite consisting of polyimine CAN and multi-wall carbon nanotubes into direct-ink-writing 3D printing to create polymeric sensors with outstanding reshaping, repairing, and recycling capabilities. The developed printable ink exhibits good printability, conductivity, and recyclability. The conductivity of printed polyimine composites is investigated at different temperatures and deformation strain levels. Their shape-reforming and Joule heating-induced interfacial welding effects are demonstrated and characterized. Finally, a temperature sensor is 3D printed with defined patterns of conductive pathways, which can be easily mounted onto 3D surfaces, repaired after damage, and recycled using solvents. The sensing capability of printed sensors is maintained after the repairing and recycling. Overall, the 3D printed reshapeable, rehealable, and recyclable sensors possess complex geometry and extend service life, which assist in the development of polymer-based electronics toward broad and sustainable applications.