Self-healed microcracks in polymer bonded explosives via thermoreversible covalent bond and hydrogen actions
Self-healed microcracks in polymer bonded explosives via thermoreversible covalent bond and hydrogen actions
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通过热可逆共价键和氢作用自修复聚合物粘结炸药中的微裂纹
DOI：
10.1016/j.dt.2022.11.014
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发表时间：
2022-11
影响因子：
5.1
通讯作者：
Xue Zheng
中科院分区：
文献类型：
--
作者：
Yu-bin Li;Xu Zhao;Ya-jun Luo;Zhi-jian Yang;Li-ping Pan;Cheng-cheng Zeng;Cong-mei Lin;Xue Zheng
聚合物粘结炸药(PBX)或其他含能复合材料(ECM)同时具有优异的力学性能和较高的自愈合能力、方便的愈合和易于制造一直是一个巨大的挑战。因此，通过在聚合物链中构建可逆的共价键和动态硬段，可以很容易地制备出具有高愈合效率和力学性能的自愈合线型聚氨酯弹性体(PTMEG2000-IPDI-DAPU，简称2I-fi)。此外，以制备的2I-DAPU聚合物为粘结剂，构建了TATB基PBX，揭示了良好的自愈合性能，可以修复在制造、运输和储存过程中产生的裂纹。采用机械加载预制损伤、高温加热修复、巴西试验CT扫描内部结构和力学性能表征等方法研究了这种PBX样品的损伤修复方式。初步探讨了PBX内部损伤的自愈机制。我们认为，这种具有Diels-Alder键的2I-DAPU粘结剂可以在fi固化温度下产生大量的表面损伤活性基团，并驱动自愈，并通过引入少量氢键来增加略堆积的硬质相。这项工作可能为改善自愈合材料的fi领域的力学性能和愈合能力提供一种新的策略，有助于扩大其在机械增强功能材料中的应用，增强其通用性。
Polymeric materials used for the polymer bonded explosive (PBX) or other energetic composite materials (ECMs) that simultaneously possess excellent mechanical properties and high self-healing ability, convenient healing, and facile fabrication are always a huge challenge. Herein, self-healing linear polyurethane elastomers (PTMEG2000-IPDI-DAPU, denoted as 2I-DAPU) with high healing efficiency and mechanical properties were facilely fabricated by constructing reversible covalent bonds and dynamic hard domains into polymer chains. Furthermore, a TATB-based PBX using as-prepared 2I-DAPU polymer.as the binder was constructed, disclosing an excellent self-healing property to heal cracks generated during fabrication, transportation and storage. The damage healing manner of such a PBX sample was investigated by means of prefabricated damage through mechanical load, heal treatment via heating at.high temperature, and CT-scanning the inner structure and mechanical property characterization via Brazilian test. The self-healing mechanism of internal damage in PBX was preliminarily explored. We propose that this 2I-DAPU binder with Diels-Alder bonds could generate plentiful active surface groups.resulting from damage and drive self-healing at fitting temperature and increase the slightly packed hard phase via incorporating a small amount of hydrogen bonds. This work may offer a novel strategy for improving mechanical property and healing ability in the field of self-healing material which could help expand its applications with enhanced versatility in mechanical-enhanced functional materials.
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影响因子：
2.1
作者：
J. Tao;Xiaofeng Wang;Sheng-Sheng Zhao-Sheng
通讯作者：
J. Tao;Xiaofeng Wang;Sheng-Sheng Zhao-Sheng
影响因子：
5
作者：
Liang, Chuyao;Li, Jie;Luo, Yunjun
通讯作者：
Luo, Yunjun
DOI：
10.1002/prep.200900110
发表时间：
2011-02
期刊：
Propellants, Explosives, Pyrotechnics
影响因子：
--
作者：
Jingyu Wang;Chongwei An;Gang Li;Lei Liang;Wenzheng Xu;Kun Wen
通讯作者：
Jingyu Wang;Chongwei An;Gang Li;Lei Liang;Wenzheng Xu;Kun Wen
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
影响因子：
15.1
作者：
Yana Zhang;Jiaoyang Chen;Guangpu Zhang;Jianqiang Xv;Jianhua Xv;Yubing Hu;Hu Guo;Fan guo;JiaJun Fu;Wei Jiang
通讯作者：
Wei Jiang
PolyNIMMO-HTPE-polyNIMMO 三嵌段共聚物作为潜在的含能粘合剂：合成和表征
影响因子：
6
作者：
Qian Zhang;Ning Liu;Ming-hui Xu;Ling Ma;Xian-ming Lu;Yuan-jie Shu;Xiao-chuan Wang
通讯作者：
Xiao-chuan Wang