Self‐healing, adhesive, photothermal responsive, stretchable, and strain‐sensitive supramolecular nanocomposite hydrogels based on host–guest interactions

IF 3.2 4区 工程技术 Q2 ENGINEERING, CHEMICAL Polymer Engineering and Science Pub Date : 2024-08-27 DOI:10.1002/pen.26939
Shiying Chen, Yixuan Nie, Yingying Huang, Yuxuan Yang, Hongyi Chen, Xiongzhi Zhang
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Abstract

The development of multifunctional supramolecular nanocomposite hydrogels remains challenging. Here, the dynamic host–guest interactions involving the host molecule CB[8] and guest units were utilized to prepare Fe3O4 hybrid supramolecular nanocomposite hydrogels. The results showed that the hydrogels obtained possessed a porous structure. The CB[8]‐modified Fe3O4 (Fe3O4@CB[8]) nanoparticles served as cross‐linkers in forming the network of hydrogels. By adjusting the Fe3O4@CB[8] content, the mechanical properties of the hydrogels could be controlled. The tensile stress was measured at 160 kPa with a fracture strain of 1380%, while the compression stress was 230 kPa at 70% compression strain. The self‐healing efficiency of the hydrogels at room temperature reached 95% after 24 h. The as‐obtained hydrogels show strain sensitivity and have the potential for applications in detecting elbow and finger movements. Our supramolecular nanocomposite hydrogels exhibit multiple functions, including self‐healing, injectability, photothermal responsiveness, and conductivity, making them suitable for integration into flexible electronics.Highlights Fe3O4@CB[8] nanoparticles serve as cross‐linkers for the nanocomposite hydrogels. CB[8] based host–guest interactions enable hydrogels to self‐heal. Fe3O4@CB[8] endow hydrogels with stretchability and photothermal responsiveness. Hydrogels exhibit injectability, NIR responsiveness, and conductive ability.
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基于主客体相互作用的自愈合、粘合、光热响应、可拉伸和应变敏感超分子纳米复合水凝胶
多功能超分子纳米复合水凝胶的开发仍具有挑战性。本文利用主分子CB[8]和客体单元之间的动态主-客体相互作用,制备了Fe3O4杂化超分子纳米复合水凝胶。结果表明,所制备的水凝胶具有多孔结构。CB[8]修饰的 Fe3O4(Fe3O4@CB[8])纳米粒子作为交联剂形成了水凝胶网络。通过调节 Fe3O4@CB[8] 的含量,可以控制水凝胶的机械性能。拉伸应力为 160 kPa,断裂应变为 1380%;压缩应力为 230 kPa,压缩应变为 70%。室温下 24 小时后,水凝胶的自愈合效率达到 95%。获得的水凝胶具有应变敏感性,有望应用于肘部和手指运动的检测。我们的超分子纳米复合水凝胶具有多种功能,包括自愈合、注射性、光热响应性和导电性,因此适合集成到柔性电子器件中。基于 CB[8] 的主客体相互作用使水凝胶能够自我修复。Fe3O4@CB[8]赋予了水凝胶可拉伸性和光热响应性。水凝胶具有可注射性、近红外响应性和导电性。
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来源期刊
Polymer Engineering and Science
Polymer Engineering and Science 工程技术-高分子科学
CiteScore
5.40
自引率
18.80%
发文量
329
审稿时长
3.7 months
期刊介绍: For more than 30 years, Polymer Engineering & Science has been one of the most highly regarded journals in the field, serving as a forum for authors of treatises on the cutting edge of polymer science and technology. The importance of PE&S is underscored by the frequent rate at which its articles are cited, especially by other publications - literally thousand of times a year. Engineers, researchers, technicians, and academicians worldwide are looking to PE&S for the valuable information they need. There are special issues compiled by distinguished guest editors. These contain proceedings of symposia on such diverse topics as polyblends, mechanics of plastics and polymer welding.
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