Murić Branka D, Pantelić Dejan V, Radmilović Mihajlo D, Savić-Šević Svetlana N, Vasović Vesna O
Institute of Physics, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia.
Western Serbia Academy of Applied Studies, Užice Department, Trg Svetog Save 34, 31000 Užice, Serbia.
Polymers (Basel). 2022 Jun 9;14(12):2350. doi: 10.3390/polym14122350.
There is an abundance of plastic materials used in the widest range of applications, such as packaging, machine parts, biomedical devices and components, etc. However, most materials used today are non-decomposable in the environment, producing a huge burden on ecosystems. The search for better, safer alternatives is still on. Here we present a detailed analysis of a simple, cheap, non-toxic, even edible, eco-friendly material, which can be easily manufactured, laser patterned and used for the fabrication of complex structures. The base substance is gelatin which is made photoresponsive by adding plasticizers and sensitizers. The resulting films were analyzed with respect to their optical, thermal and mechanical properties, which can be modified by a slight variation of chemical composition. The material is optimized for rapid laser-manufacturing of elastic microstructures (lenses, gratings, cantilevers, etc.) without any waste or residues. Overall, the material properties were tailored to increase photothermal responsivity, improve the surface quality and achieve material homogeneity, transparency and long-term stability (as verified using electron microscopy, infrared spectroscopy and differential scanning calorimetry).
有大量的塑料材料被用于最广泛的应用领域，如包装、机器零件、生物医学设备及组件等。然而，如今使用的大多数材料在环境中不可分解，给生态系统带来了巨大负担。对更好、更安全替代品的探索仍在继续。在此，我们对一种简单、廉价、无毒、甚至可食用的环保材料进行了详细分析，这种材料易于制造、可进行激光图案化处理，并可用于制造复杂结构。基础物质是明胶，通过添加增塑剂和敏化剂使其具有光响应性。对所得薄膜的光学、热学和力学性能进行了分析，这些性能可通过化学成分的微小变化进行调整。该材料经过优化，可用于快速激光制造弹性微结构（透镜、光栅、悬臂等），且无任何废料或残渣。总体而言，对材料性能进行了调整，以提高光热响应性、改善表面质量并实现材料的均匀性、透明度和长期稳定性（通过电子显微镜、红外光谱和差示扫描量热法验证）。
