Preparation and Characterization of Silicone Oil/UF Resin Microcapsules as Erosion Inhibitor

Abstract:

Microcapsules with silicone oil as core and poly (urea-formaldehyde) as shell were prepared by direct in-situ polymerization process. The influences of formaldehyde-urea molar ratios on microcapsules morphologies were investigated by scanning electron microscope (SEM). The microcapsules were characterized by fourier transform infrared spectrometer (FT-IR), particle size analyzer, simultaneous thermal analyzer. The results showed that well dispersive microcapsules were obtained with average particle size of 2.5 μm when formaldehyde-urea molar ratio was 1.8:1.0 and that the weight ratio of silicon dioxide to microcapsule was 15.4%, which produced from pyrolysis of core material silicone oil. The prepared microcapsules were expected to a kind of high-efficiency erosion inhibitor when used in propellant.

• Periodical: Key Engineering Materials (Volume 723)
• Pages: 481-485
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.723.481
• Online since: December 2016
• Authors: Hong Guang Li, Shao Sen Lin, Shi Guo Du*, De Jiang Lin
• Keywords: Erosion Inhibitor, In Situ Polymerization, Microcapsule, Silicone Oil, UF Resin

References

[1] D. Y. Li, S. Z. Gao, C. H. Luo, J. Yuan , L. Gan, Research on renovating the abrasion and ablation of the gun barrel bore, J. Gun Launch Contr., (2012) 47-50 (in Chinese).

[2] I. A. Johnston, Understanding and predicting gun barrel erosion, Edinburgh DSTO-TR-1757, (2005) 1-37.

[3] J. J. Swab, D. Danna, C. Leveritt, S. Piraino, Evaluation of a foreign silicon nitride as a potential gun barrel liner, Maryland ARL-TR-5146, (2010) 1-18.

DOI: 10.21236/ada518417

[4] Q. Z. Song, Y. X. Duo, Influence of a nanomaterial on propellant and the function of a nanomaterial for increasing the service life of a gun barrel, J. Harbin Eng. U., 32 (2011) 1173-1178 (in Chinese).

[5] R. Storm, J. C. Withers, R. Ramos, R. O. Loutfy, Fabrication of Si3N4 gun barrel liners for very high temperature erosion resistant gun barrels, Mater. Manuf. Processes, 27 (2012) 875-877.

DOI: 10.1080/10426914.2011.648697

[6] R. A. Levy, Investigation of chemically vapor deposited tantalum for medium caliber gun barrel protection, New Jersey OMB No. 0704-0188, (2008) 1-35.

DOI: 10.21236/ada512813

[7] Y. C. Chen, Q. Z. Song, J. Z. Wang, New technologies to extend the erosion life of gun barrel, Acta Armamentarii, 27 (2006) 330-334 (in Chinese).

[8] C. H. Ge, X. Y. Liang, Application research of a new ammunition inhibitor in armor-piercer, Symposium of the Professional Committee of Tanks and Armored Vehicles of China Ordnance Society, (2006) 318-321 (in Chinese).

[9] Y. C. Chen, Q. Z. Song, J. Z. Wang, Thermochemical erosion of propellant with nanometer additives, Acta Armamentarii, 28 (2007) 329-331 (in Chinese).

[10] S. Zhen, B. Liu, S. W. Liu, F. Wang, Application of a new agent of low erosion in the small caliber weapon, Chin. J. Energe. Mater., 19 (2011) 335-338 (in Chinese).

[11] D. H. Guo, Y. G. Wu, Research on the anti-erosion techniques of a large-caliber gun barrel, Ann. Meet. China Ordnance Soc., (2011) 178-183 (in Chinese).

[12] S. B. Hu, Study on microcapsule technology of bore-wear reducing additive, Master Thesis of Nanjing University of Science and Technology, (2008) (in Chinese).

[13] D. Tie, R. Xia, J. B. Hao, et al. Preparation and characterization of modified UF resin/paraffin phase change micro-capsules for storing energy, J. Funct. Mater., 46 (2015) 15142-15147 (in Chinese).

[14] Z. X. Hao, Z. Li, R. Lin, et al. Precipitation phenomenon in the urea/formaldehyde polycondensation, Acta Chimica Sinica, 67 (2009) 575-580 (in Chinese).

[15] Z. X. Hao, H. Li, Z. Li, et al. Templating effect of semicrystalline urea-formaldehyde resin with linear molecular structure, Acta Chimica Sinica, 66 (2008) 860-866 (in Chinese).

[16] X. L. Gu, J. P. Yang, Study on the prepolymer components of high-performance self-healing microcapsules, Acta Chimica Sinica, 70 (2012) 753-758 (in Chinese).

DOI: 10.6023/a1108241