Malik Zahida, Khattak Abraiz, Alahmadi Ahmad Aziz, Butt Safi Ullah
School of Natural Sciences, National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44100, Pakistan.
Department of Chemistry, COMSATS University Islamabad, Lahore Campus, Defence Road off Riwind Road, Lahore 51500, Pakistan.
Materials (Basel). 2022 Jul 25;15(15):5154. doi: 10.3390/ma15155154.
A series of polyvinyl alcohol (PVA)based composites with well dispersed nano fillers were fabricated and compared in terms of dielectric, mechanical, and optical properties. Specifically, NiO and CuO nano-fillers were utilized in a range of 0.2-0.6 wt% for thin film fabrication by solution deposition method. The characterization of nanocomposites was confirmed through FTIR, FESEM, and XRPD, whereas dielectric and mechanical properties were analyzed with respect to the filler concentrations. The bandgap of PVA/nano-filler composites reduced with an increase in NiO and CuO concentration from 0.2 to 0.6 wt%. The increase in the permittivity of the material was observed for 6 wt% of nano-fillers. The toughness of PVA/nano-filler composites was improved by increasing CuO and NiO concentration and Young's modulus of 30.9 and 27.2 MPa for 0.6 wt% of NiO and CuO-based nanocomposite, respectively, was observed. The addition of nano-fillers showed improved optical, dielectric, and mechanical properties.
制备了一系列纳米填料分散良好的聚乙烯醇（PVA）基复合材料，并对其介电、机械和光学性能进行了比较。具体而言，通过溶液沉积法制备薄膜时，NiO和CuO纳米填料的用量范围为0.2 - 0.6 wt%。通过傅里叶变换红外光谱（FTIR）、场发射扫描电子显微镜（FESEM）和X射线粉末衍射（XRPD）对纳米复合材料进行了表征，同时针对填料浓度对介电和机械性能进行了分析。随着NiO和CuO浓度从0.2 wt%增加到0.6 wt%，PVA/纳米填料复合材料的带隙减小。当纳米填料含量为6 wt%时，观察到材料的介电常数增加。通过增加CuO和NiO的浓度提高了PVA/纳米填料复合材料的韧性，对于0.6 wt%的基于NiO和CuO的纳米复合材料，分别观察到杨氏模量为30.9 MPa和27.2 MPa。纳米填料的添加显示出光学、介电和机械性能的改善。
