GOALI: Developing Piezospectroscopic Sensing Systems in Adhesives and Coatings

这项学术联络与工业（GOALI）奖的研究目标是使高空间分辨率传感系统能够准确测量聚合物材料中的应力分布，以监测粘合剂和涂料的结构完整性。这将通过一种测量技术来实现，该技术使用光致发光的氧化铝纳米颗粒作为基质材料中的应力传感器，用于实时和非破坏性地检测应力变化。氧化铝-环氧复合材料的整体和纳米尺度研究将分别在负载测试和纳米操作方法下进行。研究将集中于建立材料-传感器结构和揭示应力-光学或压电光谱关系，这将为敏感的，高空间分辨率的光学应力监测提供基础。这将被验证与控制理论之间的负载转移氧化铝纳米颗粒在基质材料。新研究的结果，如果成功的话，将导致基于传感器的粘合剂失效机制的发现，以及纳米颗粒增强先进粘合剂和涂层的强化机制。这项研究的意义在于，有可能将一种新型的先进传感系统作为结构粘合剂完整性测试的实用非破坏性方法引入。通过下一代高空间分辨率传感材料的进展，该研究有可能有助于理解和推进具有优化强度和断裂韧性的自诊断传感材料。研究目标将与在工业实验室环境中应用的新型光学应力传感材料系统的基础研究相结合。这将提供一个更好的教育和研究环境，以激发“从愿景到现实”的方法，将基础研究引向应用环境。

The research objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) award is to enable a high spatial resolution sensing system to accurately measure stress distributions within polymer materials for structural integrity monitoring in adhesives and coatings. This will be achieved through a measurement technique using photo-luminescent nanoparticles of alumina as stress sensors in a matrix material for the detection of changes in stress, real-time and non-destructively. Bulk and nanoscale studies of alumina-epoxy composites will be performed under load testing and nano-manipulation methods respectively. The studies will focus on establishing material-sensor configuration and uncovering stress-optic or piezospectroscopic relationships that will provide the basis for sensitive, high spatial resolution optical stress monitoring. This will be validated with the governing theory on load transfer between alumina nanoparticles in a matrix material. The outcome of the novel studies, if successful, will lead to sensor-based discovery of failure mechanisms in adhesives and strengthening mechanisms with nanoparticle reinforcement for advanced adhesives and coatings. The significance of the research is in the potential for enabling a new class of advanced sensing systems to be introduced as practical non-destructive methods for structural adhesives integrity testing. Through the advancement of next-generation high spatial resolution sensing materials, the research has the potential to contribute to the understanding and advancement of self-diagnostic sensing materials with optimized strength and fracture toughness. Research goals will be integrated with efforts aimed at fundamental studies on a novel optical stress sensing material system to be applied in an industrial laboratory setting. This will provide an enhanced educational and research environment to inspire a "vision to reality" approach in leading basic research towards the applied setting.