Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China.
Shandong Nonmetallic Materials Institute, Jinan 250031, China.
Molecules. 2022 Oct 11;27(20):6799. doi: 10.3390/molecules27206799.
Stab-resistant body armor can effectively prevent sharp instruments from attacking the protected parts and reduce the threat to human bodies. Shear thickening fluid (STF) is a kind of smart material with variable viscosity and its viscosity can change significantly with external stimuli. The soft and adaptive characteristics of STF provide a new idea for improving the performance of stab-proof materials. In this work, three kinds of soft anti-stabbing materials were designed and prepared with aramid, poly-p-phenylene benzodioxazole (PBO), and carbon fiber fabrics impregnated with STF. Quasi-static puncture tests and dynamic impact tests were conducted to compare the performance of different anti-stabbing structures. The results showed that the peak piercing force of the STF-treated fabrics in the puncture testing was greatly increased than that of neat samples. Against the D2 knife, the maximum impact load of STF/PBO fiber fabric was increased from 55.8 N to 72.9 N, increasing by 30.6%. Against the D3 spike, the maximum impact load of STF/aramid fabric was increased from 128.9 N to 254.7 N, increasing by 197.6%. The mechanical properties of fibers were important factors for the resistance to knives, and the fabric structure was the key point to bear the spike. Optical photographs of fabric fractures and scanning electron microscope analysis indicated that the STF effectively limited the slip of the fiber bundle when the tool penetrated the fabric, which played a positive role in maintaining the tightness and integrity of the fabric structure.
防刺服可以有效阻挡尖锐器械对人体的攻击，降低对人体的威胁。剪切增稠液（STF）是一种智能材料，具有可变的粘度，其粘度可以随外部刺激而显著变化。STF 的柔软和自适应特性为提高防刺材料的性能提供了新的思路。在这项工作中，设计并制备了三种软质防刺材料，分别是用 STF 浸渍的芳纶、聚对苯撑苯并二恶唑（PBO）和碳纤维织物。进行了准静态穿刺试验和动态冲击试验，以比较不同防刺结构的性能。结果表明，穿刺试验中 STF 处理的织物的峰值穿刺力比原样织物大大增加。对于 D2 刀，STF/PBO 纤维织物的最大冲击载荷从 55.8 N 增加到 72.9 N，增加了 30.6%。对于 D3 刺钉，STF/芳纶织物的最大冲击载荷从 128.9 N 增加到 254.7 N，增加了 197.6%。纤维的力学性能是抗刀的重要因素，而织物结构是承受刺钉的关键。织物断裂的光学照片和扫描电子显微镜分析表明，STF 有效地限制了工具穿透织物时纤维束的滑动，这对保持织物结构的紧密性和完整性起到了积极的作用。
