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首页> 外文期刊>Advanced Materials >Healable and Recyclable Elastomers with Record-High Mechanical Robustness, Unprecedented Crack Tolerance, and Superhigh Elastic Restorability
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Healable and Recyclable Elastomers with Record-High Mechanical Robustness, Unprecedented Crack Tolerance, and Superhigh Elastic Restorability

机译：具有记录高机械稳健性，前所未有的耐受性和超高弹性可安置性的可康复和可回收的弹性体

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摘要

Spider silk is one of the most robust natural materials, which has extremely high strength in combination with great toughness and good elasticity. Inspired by spider silk but beyond it, a healable and recyclable supramolecular elastomer, possessing superhigh true stress at break (1.21 GPa) and ultrahigh toughness (390.2 MJ m(-3)), which are, respectively, comparable to and approximate to 2.4 times higher than those of typical spider silk, is developed. The elastomer has the highest tensile strength (ultimate engineering stress, 75.6 MPa) ever recorded for polymeric elastomers, rendering it the strongest and toughest healable elastomer thus far. The hyper-robust elastomer exhibits superb crack tolerance with unprecedentedly high fracture energy (215.2 kJ m(-2)) that even exceeds that of metals and alloys, and superhigh elastic restorability allowing dimensional recovery from elongation over 12 times. These extraordinary mechanical performances mainly originate from the meticulously engineered hydrogen-bonding segments, consisting of multiple acylsemicarbazide and urethane moieties linked with flexible alicyclic hexatomic spacers. Such hydrogen-bonding segments, incorporated between extensible polymer chains, aggregate to form geometrically confined hydrogen-bond arrays resembling those in spider silk. The hydrogen-bond arrays act as firm but reversible crosslinks and sacrificial bonds for enormous energy dissipation, conferring exceptional mechanical robustness, healability, and recyclability on the elastomer.
机译：蜘蛛丝是最坚固的天然材料之一，其具有极高的强度，与具有巨大的韧性和良好的弹性。受到蜘蛛丝的启发，但超越它，一种可萎缩和可回收的超分子弹性体，具有突破（1.21GPa）和超高韧性（390.2MJ m（-3））的超高真应力，它们分别与2.4次相当和近似。开发出高于典型的蜘蛛丝。弹性体具有最高的拉伸强度（最终的工程应力，75.6MPa），用于聚合物弹性体，使其成为迄今为止最强最强的可愈合弹性体。超强稳健的弹性体具有卓越的裂缝耐受性，具有前所未有的高裂缝能量（215.2kJ m（-2）），甚至超过金属和合金的高裂缝和合金，以及超高弹性可恢复性，允许尺寸恢复超过12倍的伸长率。这些非凡的机械性能主要来自精心设计的氢粘合段，由多个酰基羟基肼和与柔性脂环族己类脱水剂连接的氨基甲酸酯部分组成。这种氢键段掺入可伸长的聚合物链之间，聚集体以形成类似于蜘蛛丝的几何限制氢键阵列。氢键阵列充当坚固但可逆的交联和牺牲键，用于巨大的能量耗散，赋予弹性体上的异常机械稳健性，康复性和可回收性。

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  • 来源
    《Advanced Materials》 |2021年第27期|2101498.1-2101498.11|共11页
  • 作者

    Li Zequan; Zhu You-Liang; Niu Wenwen; Yang Xiao; Jiang Zhiyong; Lu Zhong-Yuan; Liu Xiaokong; Sun Junqi;

  • 作者单位

    Jilin Univ Coll Chem State Key Lab Supramol Struct & Mat Changchun 130012 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Polymer Phys & Chem Changchun 130022 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct & Mat Changchun 130012 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Polymer Phys & Chem Changchun 130022 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Polymer Phys & Chem Changchun 130022 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct & Mat Changchun 130012 Peoples R China|Jilin Univ Inst Theoret Chem State Key Lab Supramol Struct & Mat Changchun 130023 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct & Mat Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct & Mat Changchun 130012 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    crack tolerance; elasticity; elastomers; mechanical robustness; self-healing materials;

    机译：耐受性;弹性;弹性体;机械稳健性;自我愈合材料;

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