Sąsiadek-Andrzejczak Elżbieta, Jaszczak-Kuligowska Malwina, Dudek Mariusz, Puszkarz Adam K, Kozicki Marek
Department of Mechanical Engineering, Informatics and Chemistry of Polymer Materials, Faculty of Materials Technologies and Textile Design, Lodz University of Technology, Żeromskiego 116, 90-543 Lodz, Poland.
Institute of Materials Science and Engineering, Lodz University of Technology, 90-537 Lodz, Poland.
Materials (Basel). 2025 May 26;18(11):2501. doi: 10.3390/ma18112501.
This study presents UV radiation sensors for use as paper marking. The sensors turn pink under exposure to UVA radiation and the color change is reversible. Additionally, a UV radiation retarder was applied to the sensor to delay the reaction and weaken the change in sensor color. The color changes of the sensors were analyzed depending on the absorbed dose of UVA radiation using reflectance spectrophotometry. Furthermore, the chemical analysis and surface morphology of the samples were performed using Raman Spectroscopy and Scanning Electron Microscopy, respectively. In addition, the structure of the sensors on the paper surface was assessed using X-ray Micro-Computed Tomography. Finally, possible potential applications for these types of sensors were presented, including marking, securing, and protecting against the counterfeiting of documents, paper packaging, and other paper products, and creating decorative elements, as well as measuring the 2D/3D dose distribution of UV radiation on paper products.
本研究展示了用作纸张标记的紫外线辐射传感器。这些传感器在暴露于紫外线A辐射下会变成粉红色，且颜色变化是可逆的。此外，在传感器上应用了紫外线辐射阻滞剂以延迟反应并减弱传感器颜色的变化。使用反射分光光度法根据紫外线A辐射的吸收剂量分析了传感器的颜色变化。此外，分别使用拉曼光谱和扫描电子显微镜对样品进行了化学分析和表面形态分析。另外，使用X射线微计算机断层扫描评估了纸张表面传感器的结构。最后，介绍了这类传感器可能的潜在应用，包括标记、防伪、保护文件、纸质包装和其他纸制品以防伪造，制作装饰元素，以及测量纸制品上紫外线辐射的二维/三维剂量分布。
