Alshammari Alhulw H, Alshammari Khulaif, Alshammari Majed, Taha Taha Abdel Mohaymen
Physics Department, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia.
Polymers (Basel). 2023 Feb 9;15(4):871. doi: 10.3390/polym15040871.
The present work considers the integration of g-CN nanosheets into PVC/PVP polymer nanocomposites at ratios of 0.0, 0.3, 0.6, and 1.0 wt%. The XRD data scans showed semicrystalline structures for all PVC/PVP/g-CN polymer blend films. The FTIR and Raman measurements revealed intermolecular hydrogen bonding between the g-CN surface and the OH groups of the PVC/PVP network. ESEM morphology analysis for PVC/PVP/g-CN nanocomposite films displayed homogeneous surface textures. The data of TGA showed improved thermal stability as the decomposition temperature increased from 262 to 276 °C with the content of g-CN (0.0-1.0 wt%). The optical absorbance data for PVC/PVP films improved after the addition of g-CN. The optical energy gaps showed compositional dependence on the g-CN content, which changed from 5.23 to 5.34 eV at indirect allowed transitions. The refractive index for these blend films enhanced (1.83-3.96) with the inclusion of g-CN. Moreover, the optical susceptibility for these nanocomposite films increased as the content of g-CN changed from 0.0 to 1.0 wt%. Finally, the values of the nonlinear refractive index showed improvement with the increased percentage of g-CN. When g-CN was added up to 1.0 wt%, the DC conductivity improved from 4.21 × 10 to 1.78 × 10 S/cm. The outcomes of this study prove the suitable application of PVC/PVP/g-CN in optoelectronic fiber sensors.
本工作研究了以0.0、0.3、0.6和1.0 wt%的比例将g-CN纳米片整合到PVC/PVP聚合物纳米复合材料中。XRD数据扫描显示所有PVC/PVP/g-CN聚合物共混膜均为半结晶结构。FTIR和拉曼测量揭示了g-CN表面与PVC/PVP网络的OH基团之间存在分子间氢键。PVC/PVP/g-CN纳米复合膜的ESEM形态分析显示表面纹理均匀。TGA数据表明，随着g-CN含量（0.0 - 1.0 wt%）的增加，分解温度从262℃升高到276℃，热稳定性得到改善。添加g-CN后，PVC/PVP膜的光吸收数据有所改善。光学能隙显示出对g-CN含量的成分依赖性，在间接允许跃迁时从5.23 eV变为5.34 eV。这些共混膜的折射率随着g-CN的加入而增强（1.83 - 3.96）。此外，这些纳米复合膜的光学极化率随着g-CN含量从0.0 wt%变为1.0 wt%而增加。最后，非线性折射率的值随着g-CN百分比的增加而提高。当g-CN添加量达到1.0 wt%时，直流电导率从4.21×10提升至1.78×10 S/cm。本研究结果证明了PVC/PVP/g-CN在光电纤维传感器中的适宜应用。
