Barros Daniel, Mota Carlos, Bessa João, Cunha Fernando, Oliveira Nelson, Fangueiro Raul
Fibrenamics, University of Minho, 4800-058 Guimarães, Portugal.
Spacengineer (SE), 3030-199 Coimbra, Portugal.
Materials (Basel). 2025 Mar 13;18(6):1263. doi: 10.3390/ma18061263.
Ballistic impact protection has been enhanced through the use of advanced materials, such as shear thickening fluids (STFs) and auxetic structures. These materials provide high energy absorption, flexibility, and comfort, offering promising solutions for the development of lightweight and effective personal protective equipment. The combination of STFs and auxetic structures has been shown to optimize impact resistance while maintaining mobility. To validate this, a composite made of an auxetic structure impregnated with a polyurethane and STF mixture was evaluated for energy absorption. The auxetic structure, fabricated using high-tenacity polyester, demonstrated superior energy absorption compared to standard foams. The impregnation of the auxetic structure with 200 and 400 wt% Biresin and STF mixtures significantly enhanced its impact energy absorption capacity up to 76% compared to the auxetic reference. With the addition of the STF at a 25:75 ratio into the biresin matrix, improvements were also verified in the absorption, up to 7%, due to the non-Newtonian behavior of the STF, demonstrating the potential of these composites for low-impact applications.
通过使用先进材料，如剪切增稠流体（STF）和负泊松比结构，防弹冲击保护性能得到了增强。这些材料具有高能量吸收、柔韧性和舒适性，为开发轻质且有效的个人防护装备提供了有前景的解决方案。STF和负泊松比结构的组合已被证明在保持机动性的同时能优化抗冲击性。为了验证这一点，对一种由浸渍有聚氨酯和STF混合物的负泊松比结构制成的复合材料进行了能量吸收评估。使用高强度聚酯制造的负泊松比结构显示出比标准泡沫材料更优异的能量吸收性能。用200和400重量%的双酚A型环氧树脂和STF混合物浸渍负泊松比结构，与负泊松比参考材料相比，其冲击能量吸收能力显著提高了76%。在双酚A型环氧树脂基体中以25:75的比例添加STF后，由于STF的非牛顿行为，吸收性能也得到了验证，提高了7%，这表明这些复合材料在低冲击应用方面具有潜力。
