The Incorporation of Phase Change Material into Soft Armour Inserts: Achieving a Level of Cooling without Compromising Ballistic Protection

Abstract:

In this paper we present preliminary results of ballistic testing and thermal measurement of a functional structure consisting of phase change material (PCM) and soft armour layers made of Kevlar. The purpose of this study is to explore the feasibility of combining thermal management with ballistic protection in a single system such that the thermal stress of dismounted combat personnel may be mitigated to an extent while wearing their body armour in hot and humid environments. Under such conditions the breathability of smart textiles will offer little to no benefit. In our study each Kevlar sheet is coated with PCM from Microtek Laboratories Inc. and bonded with normal PVA wood glue. Twenty coated layers were prepared for ballistic testing and compared with twenty pure Kevlar layers as reference. The cooling power of the soft armour insert (SAI) with PCM was measured on a heated sweating manikin. The proof of concept results show that the SAI with PCM only produced a mild cooling effect, which may lower skin temperature and provide a mild cooling sensation for a body region that would otherwise allow limited heat loss, due to the impermeability of the SAI.

• Periodical: Advances in Science and Technology (Volume 100)
• Pages: 38-42
• DOI: https://doi.org/10.4028/www.scientific.net/AST.100.38
• Online since: October 2016
• Authors: Ki Chun Ng*, Andrew P. Hunt, Ping Tan, Horace Billon, Michael F. Ling
• Keywords: Ballistic, Change, Cooling, Phase

References

[1] A. Gugliuzza and E. Drioli, A review on membrane engineering for innovation in wearable fabrics and protective textiles, Journal of Membrane Science 446, 350-375, (2013).

DOI: 10.1016/j.memsci.2013.07.014

[2] American Society for Testing and Materials (2010) Standard test method for measuring the heat removal rate of personal cooling systems using a sweating heated manikin: ASTM F2371-10. Pennsylvania, ASTM International.

DOI: 10.1520/f2371-16

[3] C. Gao, K. Kuklane, F. Wang and I. Holmer, Personal cooling with phase change materials to improve thermal comfort from a heat wave perspective. Indoor Air 22 (6) 523-530, (2012).

DOI: 10.1111/j.1600-0668.2012.00778.x

[4] M. Zhao, C. Gao, F. Wang, K. Kuklane, I. Holmer and J. Li, The torso cooling of vests incorporated with phase change materials: a sweat evaporation perspective, Tex. Res. J. 83 (4) 418-25, (2013).

DOI: 10.1177/0040517512460294

[5] C. Gao, F. Wang, K. Kuklane and I. Holmer, Personal cooling with phase change materials in a very hot environment, The Fourth International Conference on Human-Environment System, ICHES 2011, Sapporo, Japan, 3-6 Oct (2011).

[6] K. Pandya, K. Akella, M. Joshi and N. Naik, Ballistic impact behavior of carbon nanotube and nanosilica dispersed resin and composites, J. Appl. Phys. 112 113522, (2012).

DOI: 10.1063/1.4769750

[7] H. Shim, E. McCullough and B. Jones, Using phase change materials in clothing, Tex. Res J 71(6), 495 – 502, (2001).

[8] B. Laprise, W. Teal, L. Zuckerman and J. Cardinal, Evaluation of commercial off-the-shelf and government off-the-shelf microclimate cooling systems. U.S. Army Research, Development and Engineering Command, Natick Soldier Center, (2005).

DOI: 10.21236/ada436369

[9] E. McCullough and S. Eckels, Evaluation of Personal Cooling Systems for Soldiers. In: Castellani JW, Endrusick TL, eds. 13th International Conference on Environmental Ergonomics. Boston, USA: University of Wollongong, 2009: 200-4.

[10] M. Barwood, S. Davey, J. House and M. Tipton, Post-exercise cooling techniques in hot, humid conditions. Eur J Appl Physiol 2009; 107: 385-96.

DOI: 10.1007/s00421-009-1135-1

[11] J. House, H. Lunt, R. Taylor, G. Milligan, J. Lyons and C. House, The impact of a phase-change cooling vest on heat strain and the effect of different cooling pack melting temperatures. European Journal of Applied Physiology 2013; 113: 1223-31.

DOI: 10.1007/s00421-012-2534-2