Composites Part B: Engineering ( IF 13.1 ) Pub Date : 2022-10-20 , DOI: 10.1016/j.compositesb.2022.110368 Xiaoming Chen, Siyi Cheng, Kaiqiang Wen, Chunjiang Wang, Jie Zhang, Han Zhang, Hechuan Ma, Lei Wu, Tianliang Li, Baotong Li, Jinyou Shao
The tradeoff between damage self-sensing abilities and mechanical properties of composites is still a challenge for incorporating functional materials as potential sensing components. In this work, multifunctional carbon fabric coated with piezoelectric zinc oxide nanowires (ZnO NWs) was integrated into a carbon fiber reinforced composite as simultaneously a self-powered damage sensing component and mechanical reinforcement. The embedded ZnO NWs endowed the composite with in-situ self-sensing of damage. The sensing characteristics corresponding to the composite damage were validated by a well-established acoustic emission method. The results showed comparable performances to those obtained by common damage detection techniques. Additionally, the introduction of ZnO NWs had a positive impact on the mechanical properties of the host composite, increasing tensile and flexural strengths by 7.4% and 4.8%, respectively. These values were significantly higher than those of the interleaved strong piezoelectric PVDF thin films, leading to severe degradation in both tensile strength (−28.6%) and flexural strength (−82.4%). The enhanced mechanical properties may be ascribed to the interfacial mechanical interlocking and the increased bond area induced by the penetration of stiff ZnO NWs into the resin matrix. Overall, the excellent online and in-situ damage self-monitoring abilities with inherent structural benefits make ZnO NWs-based sensing scheme promising for broad applications in the field of structural health monitoring.
中文翻译:
集成自供电氧化锌纳米线装饰碳织物的纤维增强复合材料原位损伤自监测
复合材料的损伤自传感能力和机械性能之间的权衡仍然是将功能材料作为潜在传感组件的挑战。在这项工作中,涂有压电氧化锌纳米线(ZnO NWs)的多功能碳织物被集成到碳纤维增强复合材料中,同时作为自供电损伤传感组件和机械增强材料。嵌入的氧化锌纳米线赋予复合材料原位自我感知伤害。通过成熟的声发射方法验证了对应于复合损伤的传感特性。结果显示出与通过常见损伤检测技术获得的性能相当的性能。此外,ZnO NWs 的引入对主体复合材料的机械性能产生了积极影响,拉伸强度和弯曲强度分别提高了 7.4% 和 4.8%。这些值显着高于交错的强压电 PVDF 薄膜,导致拉伸强度(-28.6%)和弯曲强度(-82.4%)严重下降。增强的机械性能可归因于界面机械互锁和由刚性 ZnO NW 渗透到树脂基体中引起的增加的键合面积。全面的,具有固有结构优势的原位损伤自我监测能力使得基于 ZnO 纳米线的传感方案有望在结构健康监测领域得到广泛应用。