Zhang Huan, Yang Shijia, Yang Zhusheng, Wang Dong, Han Juanjuan, Li Cuihua, Zhu Caizhen, Xu Jian, Zhao Ning
Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
ACS Appl Mater Interfaces. 2021 Jan 27;13(3):4499-4507. doi: 10.1021/acsami.0c19560. Epub 2021 Jan 12.
The construction of a single polymer network with extreme stretchability, relatively high mechanical strength, and fast and facile autonomous room-temperature self-healing capability still remains a challenge. Herein, supramolecular polymer networks are fabricated by synergistically incorporating metal-ligand and hydrogen bonds in poly(propylene glycol) (PPG). The representative specimen, PPG-Im-MDA-1.5-0.25-Cu, shows a combination of notable mechanical properties involving an extreme stretching ratio of 346 ± 14× and a Young's modulus of 2.10 ± 0.14 MPa, which are superior to the previously reported extremely stretchable polymeric materials. Notably, the destroyed specimen can fully recover mechanical performances within 1 h. The tunability of mechanical properties and self-healing capability has been actualized by merely tailoring the content of a chain extender. The application of the as-prepared supramolecular PPG network in constructing a flexible and self-healable conductor has been demonstrated. This strategy provides some insights for preparing extremely stretchable and self-healable polymeric materials.
构建具有极致拉伸性、相对较高机械强度以及快速便捷的室温自主自修复能力的单一聚合物网络仍然是一项挑战。在此，通过在聚丙二醇（PPG）中协同引入金属-配体和氢键来制备超分子聚合物网络。代表性样品PPG-Im-MDA-1.5-0.25-Cu展现出显著的机械性能组合，包括346±14倍的极致拉伸比和2.10±0.14兆帕的杨氏模量，这些性能优于先前报道的极具拉伸性的聚合物材料。值得注意的是，受损样品能够在1小时内完全恢复机械性能。仅通过调整扩链剂的含量就实现了机械性能和自修复能力的可调性。已证明所制备的超分子PPG网络在构建柔性且可自修复导体方面的应用。该策略为制备极具拉伸性和可自修复的聚合物材料提供了一些见解。
