Cyclodextrin Nano-Assemblies Enabled Robust, Highly Stretchable, and Healable Elastomers with Dynamic Physical Network,Advanced Functional Materials

当前位置： X-MOL 学术 › Adv. Funct. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Cyclodextrin Nano-Assemblies Enabled Robust, Highly Stretchable, and Healable Elastomers with Dynamic Physical Network
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-10-19 , DOI: 10.1002/adfm.202210441
Sijia Li _{1,

2} , Jize Liu ₁ , Zehui Wei ₂ , Qinke Cui ₁ , Xin Yang ₁ , Yong Yang ₂ , Xinxing Zhang ₁

Affiliation

Artificial materials with biomimic self-healing ability are fascinating, however, the balance between mechanical properties and self-healing performance is always a challenge. Here, a robust, highly stretchable self-healing elastomer with dynamic reversible multi-networks based on polyurethane matrix and cyclodextrin-assembled nanosheets is proposed. The introduction of cyclodextrin nano-assemblies with abundant surface hydroxyl groups not only forms multiple interfacial hydrogen bonding but also enables a strain-induced reversible crystalline physical network owing to the special nanoconfined effect. The formation and dissociation of a dynamic crystalline physical network under stretching–releasing cycles skillfully balance the contradiction between mechanical robustness and self-healing ability. The resulting nanocomposites exhibit ultra-robust tensile strength (40.5 MPa), super toughness (274.7 MJ m⁻³), high stretchability (1696%), and desired healing efficiency (95.5%), which can lift a weight ≈ 100 000 times their own weight. This study provides a new approach to the development of mechanically robust self-healing materials for engineering applications such as artificial muscles and healable robots.

中文翻译：

环糊精纳米组装体使具有动态物理网络的稳健、高度可拉伸和可修复的弹性体成为可能

具有仿生自愈能力的人造材料令人着迷，然而，机械性能与自愈性能之间的平衡始终是一个挑战。在这里，提出了一种基于聚氨酯基质和环糊精组装纳米片的具有动态可逆多网络的坚固、高度可拉伸的自修复弹性体。具有丰富表面羟基的环糊精纳米组装体的引入不仅形成了多重界面氢键，而且由于特殊的纳米限制效应，使得应变诱导的可逆晶体物理网络成为可能。在拉伸-释放循环下动态晶体物理网络的形成和解离巧妙地平衡了机械鲁棒性和自愈能力之间的矛盾。⁻³ )、高拉伸性(1696%)、理想的愈合效率(95.5%)，可举起重量≈自身重量100 000倍的重量。这项研究为开发用于工程应用（例如人造肌肉和可修复机器人）的机械坚固的自修复材料提供了一种新方法。

更新日期：2022-10-19

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南