Alshammari Alhulw H
Physics Department, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia.
Polymers (Basel). 2024 May 14;16(10):1392. doi: 10.3390/polym16101392.
Successful preparation of PVA/SrTiO/CNT polymer nanocomposite films was accomplished via the solution casting method. The structural, optical, and thermal properties of the films were tested by XRD, SEM, FTIR, TGA, and UV-visible spectroscopy. Inclusion of the SrTiO/CNT nanofillers with a maximum of 1 wt% drastically improved the optical and thermal properties of PVA films. SrTiO has a cubic crystal structure, and its average crystal size was found to be 28.75 nm. SEM images showed uniform distribution in the sample with 0.3 wt% of SrTiO/CNTs in the PVA film, while some agglomerations appeared in the samples of higher SrTiO/CNT content, i.e., at 0.7 and 1.0 wt%, in the PVA polymer films. The inclusion of SrTiO/CNTs improved the thermal stability of PVA polymer films. The direct and indirect optical band gaps of the PVA films decreased when increasing the mass of the SrTiO/CNTs, while the single-oscillator energy () and dispersion energy () increased. The films' refractive indices were gradually increased upon increasing the nanofillers' weight. In addition, improvements in the optical susceptibility and nonlinear refractive indices' values were also obtained. These films are qualified for optoelectronic applications due to their distinct optical and thermal properties.
通过溶液浇铸法成功制备了PVA/SrTiO/CNT聚合物纳米复合薄膜。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、热重分析（TGA）和紫外可见光谱对薄膜的结构、光学和热性能进行了测试。加入最高含量为1 wt%的SrTiO/CNT纳米填料极大地改善了PVA薄膜的光学和热性能。SrTiO具有立方晶体结构，其平均晶体尺寸为28.75 nm。扫描电子显微镜图像显示，PVA薄膜中含有0.3 wt% SrTiO/CNT的样品分布均匀，而在PVA聚合物薄膜中，SrTiO/CNT含量较高（即0.7 wt%和1.0 wt%）的样品中出现了一些团聚现象。加入SrTiO/CNT提高了PVA聚合物薄膜的热稳定性。随着SrTiO/CNT质量的增加，PVA薄膜的直接和间接光学带隙减小，而单振子能量（）和色散能量（）增加。随着纳米填料重量的增加，薄膜的折射率逐渐增大。此外，光学磁化率和非线性折射率的值也得到了改善。由于其独特的光学和热性能这些薄膜适用于光电子应用。
