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Development of a Strong, Recyclable Poly(dimethylsiloxane) Elastomer with Autonomic Self-Healing Capabilities and Fluorescence Response Properties at Room Temperature
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2021-05-29 , DOI: 10.1002/mame.202100132 Shuai Liang 1 , Yawen Huang 2 , Yuan Yuan 3 , Yalan Wang 1 , Bin Yang 1 , Xiuli Zhao 4 , Lili Liu 1
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2021-05-29 , DOI: 10.1002/mame.202100132 Shuai Liang 1 , Yawen Huang 2 , Yuan Yuan 3 , Yalan Wang 1 , Bin Yang 1 , Xiuli Zhao 4 , Lili Liu 1
Affiliation
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With the recent emphasis on environmental protection measures, there are increasingly strong demands for environment-friendly multifunctional materials, so research regarding high-performance, recyclable, functional materials with self-healing abilities is of great interest. However, the comprehensive mechanical properties of most available self-healing materials are insufficient; to date, most developed materials are either tough but brittle or flexible but weak. This report describes the application of a crosslinking strategy based on multiple dynamic bonds for the development of an autonomically self-healing, multifunctional, boroxine-containing poly(dimethylsiloxane) elastomer (PDMS-BN). This approach takes advantage of well-designed intermolecular and intramolecular nitrogen-coordinated boroxines by using a synergetic dynamic mechanism. The elastomers exhibit enhanced comprehensive mechanical properties (with maximum strength up to 1.72 MPa, elongation at break up to 307%, Young's modulus up to 11.18 ± 0.52 MPa, and toughness up to 4.92 MJ m−3) and highly autonomic self-healing capabilities, with ≈96% efficiency at room temperature for 48 h. Moreover, the PDMS-BN elastomer can be recycled multiple times via crushing/molding or disassembling/casting processes, without losing their original mechanical robustness. The as-prepared elastomers also demonstrate good adhesive properties and a unique fluorescence-quenching response in the presence of Fe3+ ions.
中文翻译：
在室温下开发具有自主自愈能力和荧光响应特性的坚固、可回收的聚（二甲基硅氧烷）弹性体
近年来，随着环保措施的日益重视，对环保型多功能材料的需求越来越强烈，因此对高性能、可回收、具有自愈能力的功能材料的研究具有重要意义。然而，大多数可用的自修复材料的综合力学性能不足；迄今为止，大多数开发的材料要么坚韧但易碎，要么柔韧但脆弱。本报告描述了基于多个动态键的交联策略的应用，用于开发自主自愈、多功能、含环硼烷的聚（二甲基硅氧烷）弹性体（PDMS-BN）。该方法通过使用协同动力学机制利用精心设计的分子间和分子内氮配位环硼氧烷。−3 ) 和高度自主的自愈能力，室温下 48 小时的效率约为 96%。此外，PDMS-BN 弹性体可以通过破碎/成型或拆卸/铸造工艺多次回收，而不会失去其原有的机械强度。所制备的弹性体在 Fe 3+离子存在下也表现出良好的粘合性能和独特的荧光猝灭响应。
更新日期：2021-05-29
中文翻译：
在室温下开发具有自主自愈能力和荧光响应特性的坚固、可回收的聚（二甲基硅氧烷）弹性体
近年来，随着环保措施的日益重视，对环保型多功能材料的需求越来越强烈，因此对高性能、可回收、具有自愈能力的功能材料的研究具有重要意义。然而，大多数可用的自修复材料的综合力学性能不足；迄今为止，大多数开发的材料要么坚韧但易碎，要么柔韧但脆弱。本报告描述了基于多个动态键的交联策略的应用，用于开发自主自愈、多功能、含环硼烷的聚（二甲基硅氧烷）弹性体（PDMS-BN）。该方法通过使用协同动力学机制利用精心设计的分子间和分子内氮配位环硼氧烷。−3 ) 和高度自主的自愈能力，室温下 48 小时的效率约为 96%。此外，PDMS-BN 弹性体可以通过破碎/成型或拆卸/铸造工艺多次回收，而不会失去其原有的机械强度。所制备的弹性体在 Fe 3+离子存在下也表现出良好的粘合性能和独特的荧光猝灭响应。
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