基于环内配位稳定结构和链间配位竞争牺牲策略的高机械稳定性动态超分子弹性体

IF 5.2 1区 化学 Q1 POLYMER SCIENCE
Changyang Li, Xing Su*, Chuanbao Cao, Xiaodong Li and Meishuai Zou*, 
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引用次数: 0

摘要

设计弹性体,使其能够实时调整其机械性能,以保持外力作用下机械响应的一致性,这对于提供其设备的稳定性和可靠性至关重要。然而,目前弹性体的力学性能普遍依赖于应变速率,导致其力学不稳定。我们设计了一种超分子弹性体,通过配体竞争牺牲策略和内部稳定结构来解耦应变速率变化的机械响应。所得弹性体的应力应变统计值表现出最小的力学波动,在应变速率(20-500 mm min-1)下,拉伸强度百分比变化仅为13%,断裂伸长率变化为4%,实现应变速率不敏感。其多动态网络在室温下放置72小时后可实现96%的自愈效率。此外,在硬相中,Zn2+-嘧啶配位产生青色荧光,可被Cu2+可逆猝灭,用于定制信息加密。这项工作解决了弹性体的关键不稳定性问题,同时集成了自修复和光学响应性,为智能防伪系统和自适应设备提供了一个多功能平台,这些设备需要在不可预测的机械条件下保持一致的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A Dynamic Supramolecular Elastomer with High Mechanical Stability Guided by Intra-ring Coordination Stabilization Structures and Interchain Coordination Competition Sacrifice Strategies

A Dynamic Supramolecular Elastomer with High Mechanical Stability Guided by Intra-ring Coordination Stabilization Structures and Interchain Coordination Competition Sacrifice Strategies

A Dynamic Supramolecular Elastomer with High Mechanical Stability Guided by Intra-ring Coordination Stabilization Structures and Interchain Coordination Competition Sacrifice Strategies

Designing elastomers with the ability to adjust their mechanical properties in real time to maintain consistency of mechanical response under external forces is critical to providing stability and reliability of their devices. However, elastomers currently have a general dependence on the strain rate in their mechanical properties, leading to mechanical instability. We designed a supramolecular elastomer via a ligand-competition sacrifice strategy and intraring stabilized structures to decouple mechanical responses from strain-rate variations. The statistical values of the stress–strain of the obtained elastomer exhibit minimal mechanical fluctuations, with only 13% tensile strength percentage change and 4% elongation at break percentage change across strain rates (20–500 mm min–1), achieving strain-rate insensitivity. Its multidynamic network enables 96% self-healing efficiency after 72 h at room temperature. Additionally, Zn2+-pyrimidine coordination in hard phases grants cyan fluorescence, reversibly quenched by Cu2+ for customizable information encryption. This work resolves critical instability issues in elastomers while integrating self-healing and optical responsiveness, offering a versatile platform for smart anticounterfeiting systems and adaptive devices requiring consistent performance under unpredictable mechanical conditions.

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来源期刊
Macromolecules
Macromolecules 工程技术-高分子科学
CiteScore
9.30
自引率
16.40%
发文量
942
审稿时长
2 months
期刊介绍: Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.
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