Poly(acrylic)/Rare Earth Elements Composites Hybrid Thin Film Derived From Nanosize Colloidal Silica

• Main Authors: Shih-Yu Chen, 陳世育
• Other Authors: Yung-Fu Wu
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/54050132623113274260

碩士 === 明志科技大學 === 化工與材料工程研究所 === 95 === Usually, powder-like rare-earth compounds are prepared through sintering at high temperature. However, it is difficult to incorporate rare-earth compounds into inorganic or organic matrices to achieve a uniform dispersion at the molecular level. Fortunately, rare-earth complexes with organic ligands have shown good solubility in common organic solvents. The study used radical polymerization to synthesize the precursor of single functional acrylate (Poly(MMAMSMA)) and poly-functional acrylate (Poly(EDMA-TMPTA-MSMA)). After the synthesis, sol-gel method was applied to prepare the hybrid thin film of (PMMA)/SiO2/EuL3•2H2O and (PEDMA/PTMPTA)/SiO2 /EuL3•2H2O. The results of SCMS, TEM, and XPS showed that both SiO2 and EuL3•2H2O were able to disperse in the hybrid thin film without aggregation. The PL spectra showed the unique emission of Eu3+. The addition of SiO2 made the compounds of Eu3+ disperse better and diminished the effect of concentration quenching and obtained the maximum fluorescence intensity. The UV/Vis spectra and n&k analysis showed that the hybrid thin film had good transparency in visible light, and the refractive index was effectively controlled by the different ratio of SiO2 to EuL3•2H2O. The results of SEM and AFM showed that the hybrid thin film which formed from the polyfunctional acrylic/SiO2/EuL3•2H2O had a flatter surface. The TGA and DSC analysis indicated that the temperature of pyrolysis and Tg increased by the contained volume of SiO2. In addition, the residue also showed an increase in the thermal stability. Finally, acrylic polymer/silica hybrid films were prepared by UV-curing. The reaction of each component in the hybrid films were investigated by FTIR and Raman spectroscopy in this study.