磁性二氧化硅复合纳米粒子的合成及其与青铜器的相互作用研究

Synthesis of Magnetic Nanocomposites and Its Adsorption Performance on Bronze Wares

采用反相微乳液法,合成了以PVP分散的磁性Fe3O4纳米粒子为核、SiO2为壳并复合有荧光标记物钌联吡啶的核壳型复合功能纳米粒子.在对该功能型二氧化硅复合纳米粒子进行TEM、荧光特性和磁性等特性表征的基础上,重点研究了水溶性高聚物PVP溶液对Fe3O4纳米粒子的分散性,并将其均匀的包入SiO2壳中,基于此研究了该功能型二氧化硅复合纳米粒子与青铜器之间的相互作用、以功能型复合纳米粒子为材料对青铜器腐蚀机理进行了在线、无损、实时监测以及将复合纳米材料从被分析体系中无损去除的方法,发展了适合于去除吸附于青铜器文物表面的功能型纳米粒子的新方法.这一研究结果为以该纳米粒子为基质构建适合于青铜器表面成分分析的纳米传感器奠定了基础.

The nanocomposite of Fe3O4 with silica as well as fluorescent dye was synthesized via a modified water-in-oil reverse microemulsion method in this paper. Thereafter,transmission electron microscopy,fluorescence spectrum method and super-paramagnetic experimental etc.,were used to investigate the prop-erties of these nanocomposites. The relating results showed that the introduction of PVP in the proposed synthesis system could greatly assistant the formation of well-dispersed Fe3O4 nanoparticles in the nanoomposites. Furthermore,interaction between the nanocomposites and bronze wares was investigated,and the related results showed that this multifunction nanocomposite can be real time,in-situ and non-destructive used to study the corrosion mechanism of bronze wares.