Yust Brian G, Sk Abdur Rahaman, Kontsos Antonios, George Brian
College of Humanities & Sciences, Thomas Jefferson University, Philadelphia, PA 19144, USA.
Research and Development, Lear Corporation, 1 Penn-Dye St, Pine Grove, PA 17963, USA.
Nanomaterials (Basel). 2024 Aug 29;14(17):1414. doi: 10.3390/nano14171414.
Persistent luminescent materials are those which can store an amount of energy locally and release it slowly in the form of light. In this work, persistent luminescent nanoparticles (PLNPs) were synthesized and incorporated into polypropylene (PP) filaments at various loading percentages. We investigated the optical properties of both the as-prepared PLNPs and the PLNP-loaded filaments, focusing on any changes resulting from the integration into the filaments. Specifically, visible and near-infrared spectroscopy were used to analyze the emission, excitation, and persistent luminescence of the PLNPs and PLNP-loaded filaments. The tensile properties of the extruded filaments were also investigated through breaking tenacity, elongation at break, Young's modulus, and secant modulus. All PLNP-loaded filaments were shown to exhibit persistent luminescence when exposed to ultraviolet light. While there were no significant changes in the elongation at break or Young's modulus for the loading percentages tested, there was a slight increase in breaking tenacity and a decrease in the secant modulus. Finally, the filaments were shown to maintain their optical properties and persistent luminescence even after abrasion testing used to simulate the normal wear and tear that fabric experiences during use. These results show that PLNPs can be successfully incorporated into filaments which can be used in fabrics and will maintain the persistent luminescent properties.
持久发光材料是那些能够在局部储存一定量能量并以光的形式缓慢释放能量的材料。在这项工作中，合成了持久发光纳米颗粒（PLNPs），并以不同的负载百分比将其掺入聚丙烯（PP）长丝中。我们研究了所制备的PLNPs和负载PLNP的长丝的光学性质，重点关注因掺入长丝而产生的任何变化。具体而言，使用可见光谱和近红外光谱来分析PLNPs和负载PLNP的长丝的发射、激发和持久发光。还通过断裂强度、断裂伸长率、杨氏模量和割线模量研究了挤出长丝的拉伸性能。所有负载PLNP的长丝在暴露于紫外光时均显示出持久发光。在所测试的负载百分比下，断裂伸长率或杨氏模量没有显著变化，但断裂强度略有增加，割线模量有所降低。最后，即使在用于模拟织物在使用过程中经历的正常磨损的磨损测试后，长丝仍显示出保持其光学性质和持久发光。这些结果表明，PLNPs可以成功地掺入可用于织物的长丝中，并将保持持久发光性能。
