Abstract: In the early 21st century, for the excellent exothermic properties, the two-component or multi-component energetic metastable composites with fine structures, prepared by mixing nano-metal powder with oxides, iodides, fluorides and other oxidants, gradually step into people’s vision. They are widely used in military fields such as explosives, propellants, and reactive debris. Nano aluminum powder has a high reactivity and excellent combustion performance, and is a preferred choice for the preparation of energy-containing metastable composite materials. However, nano-aluminum powder is also easily oxidized to form a dense surface passivation layer due to its high specific surface area and this oxide layer is a “barrier” that weakens its combustion performance. While the introduction of fluoropolymer into the nano-aluminum powder system could precisely utilize this oxide layer and open a new door for the energetic metastable composite study. The exothermic and combustion properties of aluminum-fluoropolymer containing metastable composites are key technical indicators for evaluating their practical application potentials, and the main macro factors affecting the two properties include the preparation method and the mass ratio and other additions used in the processes. At present, several new methods for aluminum-fluoropolymer containing metastable composites preparation are researched: In-situ vapor deposition polymerization method, using in-situ polymerization and vapor deposition processes, could prepare uniformly coated core-shell composites, but this method has high control requirements on process accuracy and lays some safety problems. Electrostatic spray method could also obtain well-coated core-shell particles based on the electrostatic force effect. However, the yield of materials prepared by this method is very small and has a low industrial amplification feasibility. Mechanical force activation method is simple in operation and large in single batch processing. However, this method involves plenty of process parameters, and the performance of the target materials is difficult to quantify. 3D printing method has been industrialized and widely used, but the method costs a lot. In the future, by comparing the perfor-mance differences of composites obtained by different preparation methods, we can determine the appropriate way to prepare energetic metastable composites that meet the specific needs. On the other hand, from the microscopic view, the presence of a pre-ignition reaction could promote the melt diffusion process and affect the properties of energetic materials. So, the pre-ignition reaction could be promoted by activating the aluminum surface or changing the properties of the fluoropolymer. In the future, mastering the reaction mechanism of the aluminum-fluoropolymer system and knowing the role of the fluoropolymer in each reaction stage could be of great significance for the synthesis and application of new materials. This paper introduces the mechanism and application ranges of several preparation methods for emerging aluminum-fluoropolymer energetic materials. At the same time, from the preparation of fluoropolymer modified nano aluminum powder, the effect caused by pre-ignition reaction for the melt diffusion process and the material performance is analyzed, and this provides a reference for further researches and applications in other energetic material.
1 Sundaram D, Yang V, Yetter R A. Progress in Energy and Combustion Science,2017,61,293. 2 Séverac F, Alphonse P, Estève A, et al. Advanced Functional Materials,2012,22(2),323. 3 Kappagantula K S, Farley C, Pantoya M L, et al. The Journal of Physical Chemistry C,2012,116(46),24469. 4 Valluri S K, Schoenitz M, Dreizin E L. Journal of Materials Science,2017,52(12),7452. 5 Ao W, Liu X, Rezaiguia H, et al. Acta Astronautica,2017,136,219. 6 Muraleedharan M G, Unnikrishnan U, Henry A, et al. Combustion and Flame,2019,201,160. 7 Kostoglou N, Emre Gunduz I, Isik T, et al. Materials & Design,2018,144,222. 8 Valluri S K, Schoenitz M, Dreizin E. Defence Technology,2019,15(1),1. 9 Wang H, Rehwoldt M, Kline D J, et al. Combustion and Flame,2019,201,181. 10 Watson K W, Pantoya M L, Levitas V I. Combustion and Flame,2008,155(4),619. 11 Li X, Yang H, Li Y. Thermochimica Acta,2015,621,68. 12 Sippel T R, Son S F, Groven L J. Propellants, Explosives, Pyrotechnics,2013,38(2),286. 13 陶俊,王晓峰,韩仲熙,等.材料导报:研究篇,2018,32(3),894. 14 赵乃勤,马杰,师春生,等.金属热处理,2009,34(7),100. 15 孟鑫.原位合成CNTs增强Al-Cu基复合材料及其力学性能.硕士学位论文,天津大学,2014. 16 王军.2016年版中国工程物理研究院科技年报.绵阳,2016. 17 Crouse C A, Pierce C J, Spowart J E. Combustion and Flame,2012,159(10),3199. 18 He W, Liu P, Gong F, et al. ACS Applied Materials & Interfaces,2018,10(38),32849. 19 Zhou X, Torabi M, Lu J, et al. ACS Applied Materials & Interfaces,2014,6(5),3058. 20 Mohammad M, Khan M B, Sherazi T A, et al. Journal of Nanomaterials,2013,2013(81),1. 21 Almería B, Deng W, Fahmy T M, et al. Journal of Colloid and Interface Science,2010,343(1),125. 22 Wang H, Jian G, Yan S, et al. ACS Applied Materials & Interfaces,2013,5(15),6797. 23 Enayati M, Chang M, Bragman F, et al. Colloids and Surfaces A: Physicochemical and Engineering Aspects,2011,382(1-3),154. 24 DeLisio J B, Hu X, Wu T, et al. The Journal of Physical Chemistry B,2016,120(24),5534. 25 Yang H, Huang C, Chen H. Journal of Thermal Analysis and Calorimetry,2017,127(3),2293. 26 李翔宇.含氟纳米铝热剂的制备及反应特性的研究.博士学位论文,南京理工大学,2016. 27 Lyu J, Chen S, He W, et al. Chemical Engineering Journal,2019,368,129. 28 Mubyana K, Koppes R A, Lee K L, et al. Journal of Biomedical Mate-rials Research Part A,2016,104(11),2794. 29 Suryanarayana C. Progress in Materials Science,2001,46(1-2),1. 30 Rubio M A, Gunduz I E, Groven L J, et al. Combustion and Flame,2017,176,162. 31 Kwon H, Kawasaki A, Leparoux M. Journal of Composite Materials,2017,51(25),3557. 32 Sterletskii A N, Dolgoborodov A Y, Kolbanev I V, et al. Colloid Journal,2009,71(6),852. 33 McCollum J, Pantoya M L, Iacono S T. ACS Applied Materials & Interfaces,2015,7(33),18742. 34 Dolgoborodov A Y. Combustion, Explosion, and Shock Waves,2015,51(1),86. 35 Gogulya M F, Makhov M N, Brazhnikov M A, et al. In: 13th Symposium (International) on Detonation. Norfolk,2006. 36 Dolgoborodov A Y, Makhov M N, Kolbanev I V, et al. Journal of Experimental and Theoretical Physics Letters,2005,81(7),311. 37 Burmeister C F, Kwade A. Chemical Society Reviews,2013,42(18),7660. 38 Santhanam P R, Dreizin E L. Powder Technology,2012,221,403. 39 Campbell T A, Ivanova O S. Nano Today,2013,8(2),119. 40 朱延果,李志强,张荻.材料导报,2008(4),93. 41 周昕瞳,刘振星,刘昌俊.化工进展,2019,38(1),516. 42 Rengier F, Mehndiratta A, Von Tengg-Kobligk H, et al. International Journal of Computer Assisted Radiology and Surgery,2010,5(4),335. 43 张洪林,刘宝民,马新安,等.含能材料,2016,24(5),491. 44 McCollum J, Morey A M, Iacono S T. Materials & Design,2017,134,64. 45 Wang H, DeLisio J B, Holdren S, et al. Advanced Engineering Materials,2018,20(2),1700547. 46 Slocik J M, McKenzie R, Dennis P B, et al. Nature Communications,2017,8,15156. 47 Murray A K, Novotny W A, Fleck T J, et al. Additive Manufacturing,2018,22,69. 48 Horn J M, Lightstone J, Carney J, et al. In: AIP Conference Procee-dings. Boston,2012,pp.607. 49 Ruz-Nuglo F D, Groven L J. Advanced Engineering Materials,2018,20(2),1700390. 50 Wang X, Jiang M, Zhou Z, et al. Composites Part B: Engineering,2017,110,442. 51 Gebler M, Uiterkamp A J M S, Visser C. Energy Policy,2014,74,158. 52 Padhye R, Smith D K, Korzeniewski C, et al. Applied Surface Science,2017,402,225. 53 Kim S, Lim J, Lee S, et al. Combustion and Flame,2018,198,24. 54 刘洋,焦清介,闫石,等.含能材料,2018,26(8),664. 55 Levitas V I, Pantoya M L, Dean S. Combustion and Flame,2014,161(6),1668. 56 Gesner J, Pantoya M L, Levitas V I. Combustion and Flame,2012,159(11),3448. 57 Nie H, Schoenitz M, Dreizin E L. Journal of Thermal Analysis and Calorimetry,2016,125(1),129. 58 Mulamba O, Pantoya M L. Applied Surface Science,2014,315,90. 59 Padhye R, Aquino A J A, Tunega D, et al. ACS Applied Materials & Interfaces,2017,9(28),24290. 60 Osborne D T, Pantoya M L. Combustion Science and Technology,2007,179(8),1467. 61 Pantoya M L, Dean S W. Thermochimica Acta,2009,493(1-2),109. 62 Losada M, Chaudhuri S. The Journal of Chemical Physics,2010,133(13),134305. 63 McCollum J, Pantoya M L, Iacono S T. Journal of Fluorine Chemistry,2015,180,265. 64 McCollum J. Enhancing aluminum reactivity by exploiting surface chemistry and mechanical properties. Ph.D. Thesis, Texas Tech University, USA,2015. 65 Padhye R, Aquino A J, Tunega D, et al. ACS Applied Materials & Interfaces,2016,8(22),13926. 66 Levitas V I, McCollum J, Pantoya M L, et al. Combustion and Flame,2016,170,30. 67 McCollum J, Pantoya M L, Tamura N. Acta Materialia,2016,103,495. 68 郭连贵,宋武林,谢长生,等.推进技术,2012,33(3),478. 69 Hobosyan M A, Kirakosyan K G, Kharatyan S L, et al. Journal of Thermal Analysis and Calorimetry,2015,119(1),245. 70 Lee I, Reed R R, Brady V L, et al. Journal of Thermal Analysis,1997,49(3),1699. 71 DeLuca L T. Defence Technology,2018,14(5),357.