自组装GO/Al/Co_3O_4铝热剂的制备及性能研究
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摘要
为了增强纳米铝热剂反应组分间的接触程度及排列有序性,提高其反应性能,通过将纳米铝与Co_3O_4自组装到氧化石墨烯(GO)上,制得GO/Al/Co_3O_4纳米铝热剂,同时采用传统的超声分散混合制备Al/Co_3O_4纳米铝热剂进行对比研究。采用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)、差热分析(DSC)以及密闭爆发器对制得的GO/Al/Co3O4、Al/Co_3O_4铝热剂的形貌、物理化学性能进行了研究。结果表明:GO的引入能够提高纳米铝热剂组分之间的接触程度,与传统的Al/Co_3O_4纳米铝热剂相比具有更高的放热量以及更加优异的点火性能。
In order to improve the contact area between the components of nano-thermite, their packing arrangement and reactivity, graphene oxide(GO) has been introduced as a base for the self-assembly of nano Al and CO_3O_4, and GO/Al/Co_3O_4 nano-thermite was prepared, as well as Al/Co_3O_4 nano-thermite by traditional ultrasonic dispersion method was prepared. The morphology and physicochemical properties of the prepared GO/Al/Co_3O_4 and Al/Co_3O_4 have been studied, using SEM, TEM, XRD, differential thermal analysis and closed bomb test. The results show that the introduction of GO can lead to an increase in the contact area between the components of the nano-thermite, a promotion in the heat release on the combustion, and an improvement in the ignition performance, when compared with the traditional Al/Co_3O_4 nano-thermite by a physical mixture under ultrasound.
In order to improve the contact area between the components of nano-thermite, their packing arrangement and reactivity, graphene oxide(GO) has been introduced as a base for the self-assembly of nano Al and CO_3O_4, and GO/Al/Co_3O_4 nano-thermite was prepared, as well as Al/Co_3O_4 nano-thermite by traditional ultrasonic dispersion method was prepared. The morphology and physicochemical properties of the prepared GO/Al/Co_3O_4 and Al/Co_3O_4 have been studied, using SEM, TEM, XRD, differential thermal analysis and closed bomb test. The results show that the introduction of GO can lead to an increase in the contact area between the components of the nano-thermite, a promotion in the heat release on the combustion, and an improvement in the ignition performance, when compared with the traditional Al/Co_3O_4 nano-thermite by a physical mixture under ultrasound.
引文
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[3]贾栓柱,杜仕国,闫军.纳米铝热剂的制备与应用研究现状[J].化工新型材料,2018,46(8):261-264.
[4]Subramaniam S,Hasan S,Bhattacharya S,et al.Self-assembled nanoenergetic composite[J].Materials Research Society Sympo-sium Proceedings,2006(896):9-14.
[5]Séverac F,Alphonse P,Estève A,et al.Nanocomposites:high-energy Al/Cu O nanocomposites obtained by DNA-directed assembly[J].Advanced Functional Materials,2012,22(2):323-329.
[6]Lv W,Yang Q H,Shao J J.Self-assembly of graphene oxide at interfaces[J].Advanced Materials,2014,26(32):5732.
[7]Wang D H,Kou R,et al.Ternary self-assembly of ordered metal oxide-graphene nanocomposites for electrochemical energy storage[J].Acs Nano,2010,4(3):1 587-1 595.
[8]Patil A J,Vickery J L,Scott T B,et al.Aqueous stabilization and self-assembly of graphene sheets into layered bionano-composites using DNA[J].Advanced Materials,2010,21(31):3 159-3 164.
[9]Hummers JR W S,Offeman R E.Preparation of graphitic oxide[J].Journal of the American Chemical Society,1958,80(6):1 339.
[10]Shi Y X,Pang X,et al.Co3O4 and its composites for high per-formance Li-ion batteries[J].Chemical Engineering Journal,2018(343):427-446.
[11]Yin Y,Li X.Building energetic material from novel salix leaf-like Cu O and nanoal through electrophoretic deposition[J].Bulletin of the Korean Chemical Society,2016,37(11):1 827-1 830.