Mechanically robust, highly adhesive and autonomously low-temperature self-healing elastomer fabricated based on dynamic metal − ligand interactions tailored for functional energetic composites
Mechanically robust, highly adhesive and autonomously low-temperature self-healing elastomer fabricated based on dynamic metal − ligand interactions tailored for functional energetic composites
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机械坚固、高粘合性和自主低温自修复弹性体，基于动态金属与配体相互作用而制造，专为功能性含能复合材料而设计
DOI：
10.1016/j.cej.2021.130665
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发表时间：
2021
影响因子：
15.1
通讯作者：
Wei Jiang
中科院分区：
文献类型：
--
作者：
Yana Zhang;Jiaoyang Chen;Guangpu Zhang;Jianqiang Xv;Jianhua Xv;Yubing Hu;Hu Guo;Fan guo;JiaJun Fu;Wei Jiang
自我修复材料被用于各种应用中，因为它们能够延长材料的寿命和耐久性。一些重要的性质，包括对各种表面的高粘附力和机械稳定性，都有可能进一步扩大它们在各个领域的应用。在本研究中，我们设计了一种通过点击聚合制备的含能高粘合弹性体(3，5-−-PDMS-4)，该弹性体可以在20℃下自愈合。制备的聚合物胶粘剂具有突出的机械强度，高达17.91兆帕的杨氏模数。该材料还表明，当3，5-BTP-PDMS-4样品被切割成两个单独的片段时，它可以在室温下6小时内自主完全自愈和恢复其力学性能。此外，该材料在钢上具有高达1.65 Mpa的粘附力，且随着温度的降低，粘附力增加。此外，我们还利用3，5-BTP-PDMS-4作为粘结剂制备了TATB基PBX，因为它具有良好的储能性能和良好的自修复性能，可以修复在制造、运输和储存过程中产生的裂纹。令人惊讶的是，基于TATB的PBX在0°C实现了完全自愈，在−20°C实现了部分自愈，尽管低塑性炸药晶体不利于材料的自愈性能。聚合物粘合剂的成功开发具有高杨氏模数并可自主完全自愈，有助于扩大其在多个领域的应用，包括军事和民用应用。
Self-healing materials are used in various applications because of their capacity to prolong the material’s longevity and durability. Several important properties, including high adhesion force to various surfaces and mechanical robustness have the potential to further expand their application in various fields. In this study, we designed an energy-containing and high-adhesion elastomer (3,5-BTP-PDMS-4), which was fabricated via the click polymerization, that could self-heal at −20 °C. The prepared polymer adhesive exhibited prominent mechanical strength with a high Young’s modulus of up to 17.91 MPa. The material also showed that it could autonomously and completely self-heal and restore its mechanical properties within 6 h at room temperature when the 3,5-BTP-PDMS-4 sample was cut into two separate pieces. Moreover, this material was found to possess a high adhesion force of up to 1.65 MPa on steel, which increased when the temperature was reduced. Furthermore, we prepared TATB-based PBXs using 3,5-BTP-PDMS-4 as a binder because of its energy-containing property and excellent self-healing properties to heal cracks generated during fabrication, transportation and storage. Surprisingly, the TATB-based PBXs achieved complete self-healing at 0 °C and partial self-healing at −20 °C, although the low plastic explosive crystals were detrimental to the material’s self-healing properties. The successful development of a polymer adhesive that has a high-Young’s modulus and can autonomously and completely self-heal could help expand its applications with enhanced versatility in several fields, including military and civil applications.
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影响因子：
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