Advanced Functional Materials·· 5 小时前精选AI 评分67
分层编程非共价相互作用实现拉伸强度99.6 MPa的热塑性弹性体
Programming of Hierarchical Noncovalent Interactions Enables Thermoplastic Elastomers With Ultrahigh Mechanical Strength and Dynamic Stability
AI 导读
研究团队提出非共价相互作用的分层编程策略，以强萘π–π堆叠作为定向锚点，通过构象限域引导二级氢键网络有序组装，使线性聚合物体系获得99.6 MPa的超高拉伸强度和153.5 kJ mol⁻¹的应力松弛活化能。该策略由多尺度模拟预测并设计，结合计算化学与表征阐明了各层相互作用的分工如何决定宏观稳定性。所得弹性体可再加工并耐受苛刻条件，作者将其视为非共价材料的通用设计原则。
推荐理由
通过多尺度模拟设计萘的π–π堆叠与氢键的分层协同，给出非共价热塑性弹性体在强度与稳定性上的新边界。
创新点
不再并行叠加多种弱键，而是让强萘π–π堆叠充当定向锚点、模板化二级氢键网络的有序组装，产生超过简单加和的协同响应，使非共价弹性体的应力松弛活化能接近动态共价网络水平。
图表、补充材料与最终表述以原文为准。阅读原文
来源：Advanced Functional Materials · doi.org
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