在非共价键存在下通过 MXene 改性提高不敏感 NTO 炸药的耐腐蚀性和热稳定性,New Journal of Chemistry

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在非共价键存在下通过 MXene 改性提高不敏感 NTO 炸药的耐腐蚀性和热稳定性
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2022-04-18 , DOI: 10.1039/d2nj01579j
Yuanyuan Yao ₁ , Dongze Li ₁ , Shaohua Jin ₁ , Zifeng Wang ₁ , Dongxu Wang ₂ , Qinghai Shu ₁

Affiliation

对金属的强腐蚀性是制约钝感炸药3-nitro-1,2,4-triazole-5-one (NTO)广泛应用的主要因素。_{在此，通过选择性蚀刻 Ti 3} AlC ₂获得了富含活性官能团的 MXene, 并通过重结晶制备了具有棒状形态的细晶 MXene/NTO 复合材料。MXene 的加入不仅将炸药的粒径从 25 微米显着降低到 8 微米，而且将冲击敏感性从 32% 降低到 20%，将摩擦敏感性从 28% 降低到 16%。同时，由于引入了 MXene，所得 NTO/MXene 复合材料的耐腐蚀性和热稳定性增强。NTO水溶液对金属的腐蚀性是由于分子结构中的氢容易电离，具有活性基团的MXene与NTO中的氢原子通过非共价键结合，导致氢电离困难，在不改变化学性质的情况下具有耐腐蚀性。的炸药。MXene良好的导热性赋予了NTO更好的热稳定性，并促进了NTO作为成核剂的结晶。这些综合性能较好的钝感炸药将成为武器装备升级换代的中流砥柱。

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Improved corrosion resistance and thermal stability of insensitive NTO explosives by MXene modification in the presence of non-covalent bonds

Strong corrosiveness to metals is the main factor restricting the widespread application of the insensitive explosive 3-nitro-1,2,4-triazole-5-one (NTO). Herein, MXene rich in active functional groups was obtained by selective etching of Ti₃AlC₂, and fine-grained MXene/NTO composites with rod-like morphology were prepared by recrystallization. The incorporation of MXene not only significantly reduced the particle size of explosives from 25 to 8 μm, but also weakened the impact sensitivity from 32% to 20% and friction sensitivity from 28% to 16%. Meanwhile, the enhanced corrosion resistance and thermal stability of the resulting NTO/MXene composites benefited from the introduction of MXene. The corrosiveness of NTO aqueous solution to metals was due to the easy ionization of hydrogen in the molecular structure, MXene with active groups combined with hydrogen atoms in NTO by non-covalent bonds, resulting in difficult hydrogen ionization and corrosion resistance without changing the chemical properties of explosives. The good thermal conductivity of MXene endowed NTO with improved thermal stability and promoted the crystallization of NTO as a nucleating agent. These insensitive explosives with good comprehensive properties would be the mainstay of the upgrading of weapons and equipment.

更新日期：2022-04-18

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