New Progress in Research on Anti-penetration and Protection Mechanism of Spray Polyurea and Its Fiber Composites
YAN Shuai1, LYU Ping1, HUANG Weibo1,2,*, ZHANG Rui1, WANG Xu1, WANG Wenbin1, JU Jiahui2
1 School of Civil Engineering, Qingdao University of Technology, Qingdao 266400, Shandong, China 2 Qingdao Shamu Advanced Material Co., Ltd., Qingdao 266109, Shandong, China
Abstract: Under the act of high-speed punching and cutting of the intruder, helmets and bulletproof vests and other protective equipment deformation and even penetration phenomenon, and the past protective equipment to metal, ceramic-based, although good performance in protection, but the greater impact on the agility of personnel, so lightweight has become an important indicator of the design of protective equipment. The properties of spray polyurea and high-performance fibers are light and strong enough to meet the requirements of protective substrates, so the potential of spray polyurea and fibers as substrates for making protective equipment is huge. This paper starts from the structural characteristics of spray polyurea micro-phase separation, and describes the influence of soft and hard segments in the molecular chain and the presence of hydrogen bonding on the material properties. The dynamic response of spray polyurea is introduced, and it is analyzed that the spray polyurea can maintain the performance stability under wide strain rate range. The ballistic experiments show that the sprayed polyurea will change from rubbery state to glassy state when subjected to high-speed punching and cutting by the intruder, which has an increasing effect on the ballistic limit; the addition of fibers can optimize the structural integrity of the protective equipment, and the expansion of the damage area of the composite material proves the increase of the energy dissipation level. Finally, we summarize and analyze the anti-penetration mechanism of sprayed polyurea from the aspects of rearrangement crystallization of soft and hard segments and hydrogen bonding, and point out the important difficulties and urgent problems to be solved in the formation of composite materials between sprayed polyurea and fibers.
闫帅, 吕平, 黄微波, 张锐, 王旭, 王文斌, 鞠家辉. 喷涂聚脲及其纤维复合材料的抗侵彻性及防护机理研究新进展[J]. 材料导报, 2024, 38(19): 23040240-6.
YAN Shuai, LYU Ping, HUANG Weibo, ZHANG Rui, WANG Xu, WANG Wenbin, JU Jiahui. New Progress in Research on Anti-penetration and Protection Mechanism of Spray Polyurea and Its Fiber Composites. Materials Reports, 2024, 38(19): 23040240-6.
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