超分子化学
材料科学
聚合物
超分子聚合物
离解(化学)
共价键
动力学
纳米技术
软质材料
应力松弛
韧性
复合材料
化学工程
化学
物理化学
分子
有机化学
工程类
蠕动
物理
量子力学
作者
Zehuan Huang,Xiaoyi Chen,Stephen J K O'Neill,Guanglu Wu,Daniel J. Whitaker,Jiaxuan Li,Jade A. McCune,Oren A. Scherman
出处
期刊:Nature Materials
[Springer Nature]
日期:2021-11-25
卷期号:21 (1): 103-109
被引量:110
标识
DOI:10.1038/s41563-021-01124-x
摘要
Supramolecular polymer networks are non-covalently crosslinked soft materials that exhibit unique mechanical features such as self-healing, high toughness and stretchability. Previous studies have focused on optimizing such properties using fast-dissociative crosslinks (that is, for an aqueous system, dissociation rate constant kd > 10 s-1). Herein, we describe non-covalent crosslinkers with slow, tuneable dissociation kinetics (kd < 1 s-1) that enable high compressibility to supramolecular polymer networks. The resultant glass-like supramolecular networks have compressive strengths up to 100 MPa with no fracture, even when compressed at 93% strain over 12 cycles of compression and relaxation. Notably, these networks show a fast, room-temperature self-recovery (< 120 s), which may be useful for the design of high-performance soft materials. Retarding the dissociation kinetics of non-covalent crosslinks through structural control enables access of such glass-like supramolecular materials, holding substantial promise in applications including soft robotics, tissue engineering and wearable bioelectronics.
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