In this study, the solvent casting method was applied to prepare ternary blend PVA/CMC/aloe vera (60%/20%/20%) biofilms in the form of the freestanding polymeric film. The X-ray diffraction pattern revealed 93% of crystallinity of the polymeric film. The presence of functional bonding on the biofilms was analyzed by Fourier-transform infrared spectroscopy. The hardness and Young’smodulus of the prepared biofilms were examined by the nanoindentation technique. Ultraviolet (UV) absorption spectroscopy study showed that the PVA/CMC/aloe vera (PCA) blended biofilm absorption was around 280 nm, indicating a well-defined n − π* electronic transition. From the UV spectroscopy study, the absorption coefficient; Urbach energy; direct, indirect, and forbidden bandgap; optical and dielectric constant, and loss tangent of the PCA biofilm were calculated. Viscoelastic behavior of the PCA polymeric film was verified from the determined plasticity index value. The shielding efficiency of this ternary biofilm could be considered as a potential candidate for future technology-based device/packaging applications.

在这项研究中，采用溶剂流延法制备了独立聚合物膜形式的三元共混PVA / CMC /芦荟（60％/ 20％/ 20％）生物膜。X射线衍射图表明聚合物膜的结晶度为93％。通过傅立叶变换红外光谱分析生物膜上功能键的存在。通过纳米压痕技术检查了所制备生物膜的硬度和杨氏模量。紫外线（UV）吸收光谱研究表明，PVA / CMC /芦荟（PCA）混合生物膜吸收约为280 nm，表明n  -  π*定义明确电子过渡。从紫外光谱研究，吸收系数；Urbach能量；直接，间接和禁止的带隙；计算PCA生物膜的光学和介电常数以及损耗角正切。从确定的可塑性指数值证实了PCA聚合物膜的粘弹性行为。这种三元生物膜的屏蔽效率可以被认为是未来基于技术的设备/包装应用的潜在候选者。