纳米阵列式MoO_3/Al复合含能膜的制备与性能研究
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摘要
采用水热法在Ti片上成功地制备出MoO_3纳米阵列膜,并利用其作为氧化剂和基底,将纳米Al粒子电泳沉积到其表面制备出纳米阵列式MoO_3/Al复合含能膜。通过X射线衍射法(XRD)、场发射扫描电子显微镜(FE-SEM)、全自动比表面积及孔隙分析仪(BET)和差示扫描量热仪(DSC)对样品进行表征,考察了纳米Al粒子电泳沉积时间对复合含能膜放热性能的影响。结果表明,MoO_3纳米阵列膜主要由热力学稳定的正交相MoO_3纳米线阵列构成,此结构显著增大了MoO_3的比表面积,更有利于Al和MoO_3有效接触,提高二者的反应活性。当沉积时间为2min时纳米阵列式MoO_3/Al复合含能膜放热量最大为1589.0 J/g。
Nano-MoO_3 arrays successfully grown on Ti films by hydrothermal method. Nano-array MoO_3/Al composite energetic films were prepared through depositing nano-Al particles into the nano-MoO_3 arrays by EPD. Samples were characterized by XRD,FESEM,BET and DSC. Effect of deposition time of nano-Al particles on the heat release was investigated. Results showed that nano-MoO_3 arrays were composed of thermodynamically stable α-MoO_3,Morphology of α-MoO_3 was nanowire array which increased the surface area of MoO_3 and achieved the effective contact between Al and MoO_3,though reactivity of Al and MoO_3 was improved. Heat release reached to the maximum of 1589. 0 J/g when the deposition time was2 minutes.
Nano-MoO_3 arrays successfully grown on Ti films by hydrothermal method. Nano-array MoO_3/Al composite energetic films were prepared through depositing nano-Al particles into the nano-MoO_3 arrays by EPD. Samples were characterized by XRD,FESEM,BET and DSC. Effect of deposition time of nano-Al particles on the heat release was investigated. Results showed that nano-MoO_3 arrays were composed of thermodynamically stable α-MoO_3,Morphology of α-MoO_3 was nanowire array which increased the surface area of MoO_3 and achieved the effective contact between Al and MoO_3,though reactivity of Al and MoO_3 was improved. Heat release reached to the maximum of 1589. 0 J/g when the deposition time was2 minutes.
引文
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[3]Ohkura Y,Liu S Y,Rao P M,et al.Synthesis and ignition of energetic Cu O/Al core/shell nanowires[J].Proceedings of the combustion institute,2011,33(2):1909-1915.
[4]Clark B R,Pantoya M L,Hunt E M,et al.Synthesis and characterization of flexible,free-standing,energetic thin films[J].Surface and Coatings Technology,2015,284:422-426.
[5]Seo H S,Kim J K,Kim J W,et al.Thermal behavior of Al/Mo O3xerogel nanocomposites[J].Journal of Industrial and Engineering Chemistry,2014,20(1):189-193.
[6]任晓雪.国外纳米铝热剂技术发展分析[J].飞航导弹,2016(5):86-89.
[7]Weismiller M R,Malchi J Y,Lee J G,et al.Effects of fuel and oxidizer particle dimensions on the propagation of aluminum containing thermites[J].Proceedings of the Combustion Institute,2011,33(2):1989-1996.
[8]Umbrajkar S M,Schoenitz M,Dreizin E L.Control of Structural Refinement and Composition in Al‐Mo O3Nanocomposites Prepared by Arrested Reactive Milling[J].Propellants,Explosives,Pyrotechnics,2006,31(5):382-389.
[9]Fu S,Zhu Y,Li D,et al.Deposition and characterization of highly energetic Al/Mo Ox multilayer nano-films[J].The European Physical Journal-Applied Physics,2013,64(3):30301.
[10]Zhu Y,Li X,Zhang D,et al.Tuning the surface charges of Mo O3by adsorption of polyethylenimine to realize the electrophoretic deposition of high-exothermic Al/Mo O3nanoenergetic films[J].Materials&Design,2016,109:652-658.