Preparation and properties of core-shell nanohybrids of silica nanoparticles and polymers

• Main Authors: Yu-Nan Chang, 張裕楠
• Other Authors: Ying Ling Liu
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/68902945945594127959

碩士 === 中原大學 === 化學工程研究所 === 99 === In this research, the surface modification of silica nanoparticles was processed. The modification of silica particles was performed through the reaction between the silanol group on silica and the carboxyl group of N-(p-carboxyphenyl)maleimide( p-CPM). The chemical structures of the prepared materials were characterized with FT-IR and ESCA. We synthesized the particles with core-shell structures by ozone-mediated functionalization and free radical addition reaction. The inner silica of core-shell nanoparticles was etched by hydrofluoric acid, and the nano-scaled hollow spheres were formed. The structure of the hollow spheres was characterized with FT-IR, thermal analysis and elemental analysis. In addition, the core-shell structure can be clearly observed by SEM and TEM. Then the hollow spheres were injected into N2 gas, and the gas-filled hollow spheres show ultrasound-induced imaging behavior. The fluorescent properties and fluorescence enhancement were observed about Si-p-CPM-FDP-FBz. The phenomenon of fluorescent generated can be observed by UV / Vis spectroscope and photoluminescence spectroscopy. The Si-p-CPM-FDP-FBz was added into PMMA polymer matrix to prepare composite membranes which show fluorescent properties, and also the fluorescence phenomenon was characterized by UV / Vis spectroscope and photoluminescence spectroscopy. The composite membranes show the fluorescent emission under UV irradiation with 365 nm.