| In recent years, with the rapid development of nanotechnology and nanomaterial, nano-structured materials have been widely used in chemical, biological, environmental monitoring, medical diagnostics, materials science and many other fields. Among them, the silica fluorescent nanocomposites had following advantages:(1) Silica had chemical inert, optical transparency and good stability;(2) silica plays a protective effect on the stability of the doped dyes, leading a less susceptible to photodegradation or bleaching;(3) At the same time, silica nanoparticles are good chemically active, biocompatible and easy to surface modification, so at the present stage they have shown great promise in applications of biosensor, chemical biology micro-analysis, medical diagnostics and so on. However, few reports in the literature about silica nanoparticles provides a nondestructive and general way on the cultrual relics surface. Research purpose of this thesis was using the excellent characteristics of the silica nanoparticles and incorporated functional polymer materials into them, its conquered the shortcomings that the single silica nanoparticles can not be removed easily from the surface of culture heritage, this method as well as broadened the application fields of the silica nanoparticles.Two parts were included in this thesis:review and the research paper. The first part was review, this part evaluated the some kinds of fluorescent nanomaterials. In additional, the preparation methods and wildly analytical applications progress research of silica nanoparticles were also introduced importantly in this chapter. The second part was research report, we used two different methods to design and synthesis the functional fluorescent nanocomposite and the non-destructive applications on the suface of culture heritage was researched.In this thesis, we focused our interests on the synthesis of the functional fluorescent nanocomposite film and PVA doped silica nanoparticles and at the same time discussed the non-destructive analysis application on cultural relics. The works are included in the followings:1. The Fabrication of Fluorescent Nanocomposite Film and Its Application for Imaging Chloride Ions on the Surface of Bronze Wares The nanocomposite film was synthesized by the silica fluorescent ratiometric nanosesors and PVA thin, and successfully applied for fluorescent sensing chloride ions on the surface of bronze wares. Thereafter, Transmission electron microscopy, Scanning electron microscope, Fluorescence spectrum method and Digital fluorescence images experimental etc., were used to investigate the properties of chloride nanosensors, interaction between the nanocomposites film and bronze wares. Furthermore, non-destructive scheme for fluorescent sensing chloride ions on the surface of bronze wares was investigated. Based on these findings, the fluorescent nanocomposite film were successfully used to detect the activity of chlorine ion on the surface of copper coins.2. The Synthesis of PVA-Chitosan-SiO2Fluorescent Nanocomposites and Its Application on the Surface of PaperThe nanocomposite of PVA-Chitosan with silica was successfully synthesized via a water-in-oil reverse microemulsion method in this paper. Thereafter, Transmission electron microscopy, Fluorescence spectrum method etc., were used to characterize the nanocomposites, it was found that the water-soluble and chemical stability were improved because of the PVA was added into silica nanocomposites. In addition, the interaction between the nanocomposites and paper was investigated, and the nanocomposite was easily removed from the paper with water. Accordingly, we provided a kind of new method of synthesizing silica nanocomposites which doped functional polymer materials, and also the fluorescence composite nanoparticles applications has been widen. |
PDF Full Text Request