Fabrication and Characterization of PMMA/HMX-based Microcapsules via in situ Polymerization

• Autorzy: Jia X. , Hou C. , Tan Y. , Wang J. , Ye B.

Identyfikatory

DOI

10.22211/cejem/70455

• Języki publikacji: EN

Abstrakty

EN

Microcapsule technology was applied with nitramine explosives to improve their performance. Polymethyl Methacrylate (PMMA) was selected for the fabrication of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) based microcapsules. The PMMA/HMX-based microcapsules were prepared via a facile in situ polymerization of PMMA on the surface of the HMX crystals. Structural characterization of the PMMA/HMX microcapsules was studied systematically by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, and their thermal durability as well as their mechanical sensitivities were measured. The results indicated that spherical microcapsules were formed, with PMMA as the capsule wall and HMX as the core material. The SEM results showed that the grains of the PMMA/HMX microcapsules were spherical and that the particle distribution was homogeneous. XRD and FT-IR analyses indicated that the HMX polymorph was preserved in the optimal β-form during the whole preparative process. The DSC results showed that the PMMA/HMX microcapsules had better thermal decomposition performance, and that the apparent activation energy of the microcapsules had increased by 47.3 kJ/mol compared to the recrystallized HMX, and its thermal stability had greatly improved. In addition, the drop height (H50) had increased from 30.45 cm to 58.49 cm, an increase of 65.81%. Thus, microcapsule technology will have a very wide range of applications in reducing the sensitivity of high energy materials in the future.

Słowa kluczowe

EN

fabrication; characterization; HMX; PMMA; microcapsules

• Wydawca: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2017
• Tom: Vol. 14, no. 3
• Strony: 559--572
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Jia X.

• School of Chemical Engineering and Environment, North University of China, Taiyuan, 030051, Shanxi, P. R. China

autor

Hou C.

• School of Chemical Engineering and Environment, North University of China, Taiyuan, 030051, Shanxi, P. R. China

autor

Tan Y.

• School of Chemical Engineering and Environment, North University of China, Taiyuan, 030051, Shanxi, P. R. China

autor

Wang J.

• School of Chemical Engineering and Environment, North University of China, Taiyuan, 030051, Shanxi, P. R. China

autor

Ye B.

• School of Chemical Engineering and Environment, North University of China, Taiyuan, 030051, Shanxi, P. R. China

Bibliografia

• [1] Kondo, A. Microcapsule Processing and Technology. Marcel Dekker, 1979; ISBN 9780824768577.
• [2] Microencapsulation: Methods and Industrial Applications. CRC Press, 2005; ISBN 9780824723170.
• [3] Lu, R.; Dou, H.; Qiu, Y.; Zhang, D; Sun, K.. Polymeric Microcapsules with Internal Cavities for Ultrasonic Imaging: Efficient Fabrication and Physical Characterization. Colloid Polym. Sci. 2009, 287(6): 683-693.
• [4] Griss, P.; Andersson, H.; Stemme, G. Expandable Microspheres for the Handling of Liquids. Lab Chip 2002, 2(2): 117-120.
• [5] Kim, Y. D.; Morr, C. V. Microencapsulation Properties of Gum Arabic and Several Food Proteins: Spray-Dried Orange Oil Emulsion Particles. J. Agric. Food Chem. 1996, 44(5): 1314-1320.
• [6] Cook, M. T.; Tzortzis, G.; Charalampopoulos, D.; Khutoryanskiy, V. V. Microencapsulation of Probiotics for Gastrointestinal Delivery. J. Controlled Release 2012, 162(1): 56-67.
• [7] Nazzaro, F.; Orlando, P.; Fratianni, F.; Coppola, R. Microencapsulation in Food Science and Biotechnology. Curr. Opin. Biotechnol. 2012, 23(2): 182-186.
• [8] Aziz, F. R. A.; Jai, J.; Raslan, R.; Subuki, I. Microencapsulation of Essential Oils Application in Textile: A Review. Adv. Mater. Res. (Durnten-Zurich, Switz.) 2015, 1113.
• [9] Vandegaer, J. E. Microencapsulation: Processes and Applications. Springer Science & Business Media, 2012; ISBN 9781468407419.
• [10] NeoDauer, M. P.; Poehlmann, M.; Fery, A. Microcapsule Mechanics : from Stability to Function. Adv. Colloid interface 2014, 207: 65-80.
• [11] Pretazl, M.; Neubauer, M.; Tekaat, M.; Kunert, C.; Kuttner, C.; Leon, G.; Berthier, D.; Erni, P.; Quali, L.; Fery, A. Formation and Mechanical Characterization of Aminoplast Core-Shell Microcapsules. ACS Appl. Mater. Interfaces 2012, (4):2940-2948.
• [12] Kröber, H.; Teipel, U. Crystallization of Insensitive HMX. Propellants Explos. Pyrotech. 2008, 33(1): 33-36.
• [13] Van der Heijden, A. E. D. M.; Creyghton, Y. L. M.; Marino, E.; Bouma, B.; Duvalois, W. Energetic Materials: Crystallization, Characterization and Insensitive Plastic Bonded Explosives. Propellants Explos. Pyrotech. 2008, 33(1): 25-32.
• [14] Song, X.; Wang, Y.; An, C.; Guo, X.; Li, F. Dependence of Particle Morphology and Size on the Mechanical Sensitivity and Thermal Stability of Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine. J. Hazard. Mater. 2008, 159(2): 222-229.
• [15] Ji, W.; Li, X.; Wang, J.; Ye, B.; Wang, C. Preparation and Characterization of the Solid Spherical HMX/F2602 by the Suspension Spray-Drying Method. J. Energ. Mater. 2016, 34(4): 357-367.
• [16] Su, J. F.;. Schlangen, E. Synthesis and Physicochemical Properties of High Compact Microcapsules Containing Rejuvenator Applied in Asphalt. Chem. Eng. J. 2012, 198: 289-300.
• [17] Roghani-Mamaqani, H.; Haddadi-Asl, V.; Salami-Kalajahi, M. In Situ Controlled Radical Polymerization: a Review on Synthesis of Well-Defined Nanocomposites. Polvm. Rev. 2012, 52: 142-188.
• [18] Li, J. C.; Jiao, Q. J.; Ren, H.; Wang, L. X.; Zhao, W. D. Study on Processing Parameters of RDX Micro-capsule Coated by Protein. Initiators & Pyrotechnics (Huogongpin) 2007, 1-5.
• [19] Cheng, Z. W.; Bao, Z. H. Fabrication and Characterization of Solid-Core Material Microcapsulation. Polym. Bull. 2010, 55-60.
• [20] Zeng, G. Y.; Nie, F. D.; Liu, L.; Chen, J.; Huang, H. In Situ Crystallization Coating HMX by Polyurethane. Chin. J. Energ. Mater. (Hanneng Cailiao) 2011, 138-141.
• [21] Dai, Jing.; Lang, M. Preparation and Mechanical Properties of Graphene Oxide/PMMA and Surface-Functionalized Graphene/PMMA Composites. Acta Chim. Sin. (Engl. Ed.) 2012, 1237-1244.
• [22] Li, H. G.; Yan, J.; Wang, M. Q.; Meng, S. H.; Du, S. G. Microcapsulation of TiO2 Precursor and Its Performance as Inhibitor of Erosion. J. Inorg. Mater. 2015, 47-52.
• [23] Yan, Q. L.; Zeman, S. Theoretical Evaluation of Sensitivity and Thermal Stability for High Explosives Based on Quantum Chemistry Methods: a Brief Review. Int. J. Quantum Chem. 2013, 113: 1049-1061.
• [24] Kissinger, H. E. Reaction Kinetics in Differential Themral Analysis. Anal. Chem. 1957, 29(11): 1702-1706.
• [25] Sha, W. Determination of Activation Energy of Phase Transformation and Recrystallization Using a Modified Kissinger Method. Metall. Mater. Trans. A 2001, 32: 2903-2904.
• [26] Doherty, M.; Watt, D. S. Relationship between RDX Properties and Sensitivity. Propellants Explos. Pyrotech. 2008, 33: 4-13.