Abstract
Constructing self-protected metastable intermolecular composites (MICs) enables the regulation of microstructures towards boosting controllable detonation performance, and also prevents information leakage, which is meaningful but challenging. Herein, a convenient and efficient method of combining highly-controlled electrophoretic assembly, surface modification and microwave heat treatment was employed to design promising heat-triggered wettability switchable high-energy smart C-doped Al/Cr2O3 MIC, and surface modification mechanism was proposed, respectively. The anti-wetting ability of the product was demonstrated by a series of tests of water contact angle, impact resistance, immersion, self-cleaning, etc. The key information recording/encryption procedures were realized by constructing a hydrophilic/hydrophobic interface and adjusting the wettability of the product. In addition, the output heat of asobtained smart MIC can reach ~ 1.5 kJ·g−1, and its attenuation rate was only ~ 30% even after underwater aging, further verifying its potential practicality. Thus, our design provides a promising strategy for engineering smart MIC with diversified functional structures for blasting applications and beyond.
Graphical abstract
摘要
构建自保护亚稳态分子间复合材料(MICs),既能调控微结构,提高可控爆轰性能,又能防止信息泄漏,具有重要意义,但也具有挑战性。本文采用一种简便高效的方法,结合高度可控的电泳组装、表面修饰和微波热处理,设计了具有前景的热触发润湿性可切换高能智能碳掺杂Al/Cr2O3 MIC,并提出了表面修饰机理。通过水接触角、抗冲击性、浸没性、自洁性等一系列试验,验证了产品的抗润湿能力。通过构建亲疏水界面和调节产品润湿性,实现了关键信息的记录/加密过程。此外,所得智能MIC的发热量可达~1.5 kJ·g−1,即使经过水下老化,其衰减率也仅到~30%,进一步验证了其潜在的实用性。因此,我们的设计为具有多种功能结构的智能MIC的工程设计提供了一个有前景的策略,用于爆破及其他领域.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Nos. 21805014, 82102635, 52373087, 52003300 and 22109120) and Chongqing Municipal Education Commission (Nos. CXQT20026 and KJQN202201408). Thanks to eceshi (www.eceshi.com) for the SEM, XRD and TEM analysis.
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Guo, XG., Liang, TT., Huang, HS. et al. Programming an efficient technique for designing smart C-doped MIC with dual self-protection for information and high-energy. Rare Met. (2024). https://doi.org/10.1007/s12598-024-02877-5
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DOI: https://doi.org/10.1007/s12598-024-02877-5