The research of hydrogels has been increasingly focused on designing an effective energy dissipation structure in recent years. Here, we report a kind of novel supramolecular cross-linker, which was formed by self-assembling amphiphilic block copolymers with guest groups at the end and vinyl-functionalized cyclodextrin (CD) through host–guest interaction. These cross-linkers could dissipate energy effectively since they combined multiple sacrificial mechanisms across multiscales through physical interactions. The resulted hydrogel shows distinguishing mechanical properties (fracture toughness of 2.68 ± 0.69 MJ/m³, tension strength of up to 475 kPa, uniaxial stretch over 2100%), remarkable fatigue resistance, and thermal- and light-responsive behaviors.

中文翻译：

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具有多种刺激响应能力的超韧超拉伸水凝胶

近年来，水凝胶的研究越来越集中在设计有效的能量消散结构上。在这里，我们报告了一种新型的超分子交联剂，它是通过自组装带有客体基团的两亲嵌段共聚物和通过主体-客体相互作用的乙烯基官能化环糊精（CD）组装而成的。这些交联剂可以有效地耗散能量，因为它们通过物理相互作用将跨多个尺度的多种牺牲机制结合在一起。所得水凝胶显示出独特的机械性能（断裂韧性为2.68±0.69 MJ / m ³，抗张强度高达475 kPa，单轴拉伸超过2100％），显着的抗疲劳性以及热响应和光响应行为。