Aldosari F M, Sefrji Fatmah O, Alsharari Abdulrhman M, Al-Ghamdi S A, Alqarni Sara A, Hadi Muhammad, Alamoudi Wael M, El-Metwaly Nashwa M
Department of Physics, College of Science and Humanities, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia.
Department of Biology, College of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia.
Luminescence. 2024 Dec;39(12):e70067. doi: 10.1002/bio.70067.
This study investigates the optical, mechanical, and antimicrobial properties of polypropylene (PP) fibers enhanced with titanium dioxide (TiO) and zinc oxide (ZnO) nanoparticles. Using a Mach-Zehnder interferometric system, we examined the refractive indices, birefringence, and opto-mechanical behavior of blank PP, PP/TiO, and PP/ZnO nanocomposite fibers under various conditions, including different polarization orientations and during cold drawing processes. The 2D Fourier transform algorithm is employed to analyze interferometric data, enabling precise measurements of refractive index profiles and birefringence. Results show that both TiO and ZnO nanoparticles significantly enhance the optical and mechanical properties of PP fibers. PP/TiO fibers exhibited the highest refractive index (1.530) and birefringence (0.0459), followed by PP/ZnO (1.522 and 0.040) and blank PP (1.520 and 0.031). The maximum draw ratios achieved were 4.2, 3.9, and 3.5 for PP/TiO, PP/ZnO, and blank PP fibers, respectively, indicating improved mechanical properties in the nanocomposites. Antimicrobial efficacy was evaluated using the shaking flask method and optical density measurements against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans. PP/ZnO fibers demonstrated the highest antimicrobial activity, with growth reductions ranging from 64.8% to 80.4%, followed by PP/TiO2 fibers (56.0% to 70.3%).
本研究调查了用二氧化钛（TiO）和氧化锌（ZnO）纳米颗粒增强的聚丙烯（PP）纤维的光学、机械和抗菌性能。使用马赫-曾德尔干涉仪系统，我们在包括不同偏振方向和冷拉伸过程等各种条件下，研究了空白PP、PP/TiO和PP/ZnO纳米复合纤维的折射率、双折射和光机械行为。采用二维傅里叶变换算法分析干涉数据，从而能够精确测量折射率分布和双折射。结果表明，TiO和ZnO纳米颗粒均显著提高了PP纤维的光学和机械性能。PP/TiO纤维表现出最高的折射率（1.530）和双折射（0.0459），其次是PP/ZnO（1.522和0.040）以及空白PP（1.520和0.031）。PP/TiO、PP/ZnO和空白PP纤维分别实现的最大拉伸比为4.2、3.9和3.5，表明纳米复合材料的机械性能有所改善。使用摇瓶法和针对大肠杆菌、金黄色葡萄球菌、铜绿假单胞菌和白色念珠菌的光密度测量来评估抗菌效果。PP/ZnO纤维表现出最高的抗菌活性，生长抑制率在64.8%至80.4%之间，其次是PP/TiO2纤维（56.0%至70.3%）。
