UV absorption by cerium oxide nanoparticles/epoxy composite thin films

Ngoc Nhiem Dao, Minh Dai Luu, Quang Khuyen Nguyen and Byung Sun Kim

  • ANSN Editor
Keywords: nano


Cerium oxide (CeO2) nanoparticles have been used to modify properties of an epoxy matrix in order to improve the ultra-violet (UV) absorption property of epoxy thin films. The interdependence of mechanical properties, UV absorption property and the dispersed concentration of CeO2nanoparticles was investigated. Results showed that, by increasing the dispersed concentration of CeO2 nanoparticles up to 3 wt%, tensile modulus increases while two other mechanical properties, namely tensile strength and elongation, decrease. The UV absorption peak and the absorption edges of the studied thin films were observed in the UV-Vis absorption spectra. By incorporating CeO2nanoparticles into the epoxy matrix, an absorption peak appears at around 318 nm in UV-Vis spectra with increasing CeO2 concentration from 0.1 to 1.0 wt%. Scanning electron microscopy (SEM) images revealed that a good dispersion of nanoparticles in the epoxy matrix by an ultrasonic method was achieved

Regular articles