Thermal/Near-Infrared Light Dual-Responsive Reconfigurable and Recyclable Polythiourethane/CNT Composite with Simultaneously Enhanced Strength and Toughness,Macromolecular Rapid Communications

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Thermal/Near-Infrared Light Dual-Responsive Reconfigurable and Recyclable Polythiourethane/CNT Composite with Simultaneously Enhanced Strength and Toughness
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2022-11-29 , DOI: 10.1002/marc.202200806
Chunrui Zhao ₁ , Huimin Yue ₁ , Miaoming Huang ₁ , Suqin He _{1,

2} , Hao Liu ₁ , Wentao Liu ₁ , Chengshen Zhu ₁ , Lei Jiang ₃

Affiliation

Thermoset polymers cross-linked by dynamic covalent bonds are recyclable and reconfigurable based on solid-state plasticity, resulting in less waste and environmental pollution. However, most thermoset polymers previously reported show thermal-responsive solid-state plasticity, depending much on external conditions and not allowing for local shape modulation. Herein, the isocyanate modified carbon nanotubes (CNTs-NCO) are introduced into the polythiourethane (PCTU) network with multiple dynamic covalent bonds by in situ polymerization to prepare the composite with thermal/light dual-responsive solid-state plasticity, reconfigurability, and recyclability. The introduction of CNTs-NCO simultaneously strengthens and toughens the PCTU composite. Moreover, based on the photothermal properties and light-responsive solid-state plasticity, the PCTU/CNTs composite or bilayer sample can achieve complex permanent shape by locally precise shape regulation without affecting other parts. This work provides a simple and reliable method for preparing high-performance polymer composite with light-responsive solid-state plasticity, which may be applied in the fields of sensing and flexible electronics.

中文翻译：

热/近红外光双响应可重构和可回收聚硫氨酯/碳纳米管复合材料同时增强强度和韧性

通过动态共价键交联的热固性聚合物基于固态可塑性可回收和重新配置，从而减少浪费和环境污染。然而，之前报道的大多数热固性聚合物显示出热响应固态可塑性，这在很大程度上取决于外部条件并且不允许局部形状调制。在此，通过原位聚合将异氰酸酯改性碳纳米管（CNTs-NCO）引入具有多个动态共价键的聚硫氨酯（PCTU）网络中，制备具有热/光双响应固态可塑性、可重构性和可回收性的复合材料. CNTs-NCO 的引入同时增强和增韧了 PCTU 复合材料。此外，基于光热特性和光响应固态可塑性，PCTU/CNTs 复合材料或双层样品可以通过局部精确的形状调节来实现复杂的永久形状，而不影响其他部分。该工作为制备具有光响应固态塑性的高性能聚合物复合材料提供了一种简单可靠的方法，可应用于传感和柔性电子领域。

更新日期：2022-11-29

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