ABSTRACT

The induced alterations in the optical properties of synthesized Polyaniline copper/polymethyl methacrylate, (PANI-Cu/PMMA) and polyaniline-copper/Cellulose Triacetate (PANI-Cu/CTA) nanocomposites (NCPs) owing to UV irradiation have been investigated. Regular arrangements of images for the NCP samples have been represented by scanning electron microscopy (SEM). Samples from the prepared NCPs have been exposed to UV radiation in the fluence range 25–120 J/cm². Different optical parameters of the blank and irradiated NCP samples have been examined using UV spectroscopy technique. The optical energy gap decreased from 4.79 and 2.63 to 4.22 and 1.42 eV for the PANI-Cu/PMMA and PANI-Cu/CTA NCPs, respectively, upon increasing the UV fluence up to 120 J/cm². This could be attributed to increasing bonding between PANI-Cu NCP and PMMA or CTA polymers, reflected in an increase in the disordered character. The resultant effect of UV radiation on the PANI-Cu/CTA NCP assists in tailoring the optical properties of such NCP for usage in optoelectronics applications.

摘要

研究了合成的聚苯胺铜/聚甲基丙烯酸甲酯（PANI-Cu / PMMA）和聚苯胺-铜/纤维素三乙酸酯（PANI-Cu / CTA）纳米复合材料（NCPs）的光学性质归因于紫外线辐射的诱导变化。NCP样品图像的规则排列已通过扫描电子显微镜（SEM）表示。制备的NCP的样品已暴露于25–120 J / cm ²的注量范围的紫外线辐射中。使用紫外光谱技术检查了空白和辐照的NCP样品的不同光学参数。当将紫外线通量提高至120 J / cm ^2时，PANI-Cu / PMMA和PANI-Cu / CTA NCP的光能隙分别从4.79和2.63降低至4.22和1.42 eV。。这可能归因于PANI-Cu NCP与PMMA或CTA聚合物之间的键合增加，这反映在无序特征的增加上。紫外线对PANI-Cu / CTA NCP的最终影响有助于定制此类NCP的光学特性，以用于光电应用。