形变位点精确分辨的可编码智能弹性水凝胶光导纤维

With the rapid development of artificial intelligence and internet of things, highly stretchable hydrogel optical fiber is much promising as an ideal light-weight, smart, and wearable sensor owing to its easy access to structural design as well as its unique deformation site-resolved sensitivity. However, it is still challenging to precisely control the dyeing sites and discern the heavily overlapped attenuation spectra. In this project, we aim to employ reactive dye-functionalized microgels to precisely code the hydrogel optical fiber, and further utilize two-dimensional correlation spectroscopy to analyze the output attenuation spectra, in order to realize the accurate deformation site resolution in both spatial and temporal scales. Microgels with different colors can be introduced into the specific sites of hydrogel fiber via microfluidics and physical trapping; two-dimensional correlation spectroscopy can not only significantly enhance the spectral resolution, but also determine the sequential response of different deformation sites. With the aid of this structural design and analytical method, we will build the precise mapping relationship between deformation and spectral output, which is the key to developing next-generation highly-sensitive hydrogel optical fiber-based wearable sensors.

随着人工智能、物联网等新兴领域的发展，基于光学信号表达的柔性可拉伸水凝胶光导纤维由于结构和性能广泛可调及对形变位点的分辨性，有望成为新一代轻量化智能可穿戴传感器件的理想构筑材料，但在这一应用领域仍存在着形变位点控制性差及叠加衰减谱图难以有效分辨等问题。本项目拟通过不同活性染料功能化的微凝胶对凝胶光导纤维芯层进行定位编码，并利用二维相关光谱的先进分析方法对输出的衰减谱图进行解析，以实现凝胶光导纤维在空间和时间双重维度上的形变位点可分辨性。不同发色的微凝胶通过程序微流控及物理嵌入的方式引入凝胶纤维可有效解决空间上形变位点控制性的问题；二维相关光谱不仅可对复杂动态衰减谱图进行有效分辨，还可辨别不同形变位点在时间上的响应次序。借助这一优化结构设计和谱学分析方法，有望构建形变位点响应与衰减光谱输出之间的准确映射关系，为基于凝胶光导纤维的新型智能柔性可穿戴光学传感器的合成设计奠定一定的理论和实验基础。

随着人工智能、物联网等新兴领域的发展，基于光学信号表达的柔性可拉伸水凝胶光导纤维由于结构和性能广泛可调及对形变位点的分辨性，有望成为新一代轻量化智能可穿戴传感器件的理想构筑材料，但在这一应用领域仍存在着形变位点控制性差及叠加衰减谱图难以有效分辨等问题。受鱼侧线感知系统启发，本项目开发了一种可用于柔性水下传感的智能水凝胶-弹性体复合光导纤维，通过芯鞘双层紧密界面贴合和易扰动特性使得光学衰减信号表现出了对各类微小刺激如形变、静水压、声波、水流、温度等的超灵敏精确感知能力，可模拟出几乎所有鱼侧线系统的感知功能。借助这一优化结构设计和先进谱学分析方法，成功构建了形变响应与衰减光谱输出之间的准确映射关系。在此研究基础上，进一步开发了可实现光学/电学感知的多种高性能弹性凝胶纤维材料，为基于凝胶纤维的新型智能柔性可穿戴传感器的合成设计奠定了理论和实验基础。受项目资助，在Adv Mater, Angew Chem Int Ed, Sci Adv, Nat Commun等杂志共发表标注本项目的SCI论文23篇，授权发明专利3项。