The Preparation And Study Of Silicone Dielectric Elastomer Composites

The rare-earth complexes have been found excellent fluorescent performence and be widespread used in many applications such as lighting device, imaging materials, sensors and so on. However, with the rapid increase of economy and society, traditional rare earth complexes have been showing its limitations and deficiencies gradually. Therefore, on the one hand, people study new rare earth complexes for more excellent fluorescent performance, and on the other hand, people improve the overall performance of materials through the combination of rare earth complexes and polymer composite. Rare earth organic complexes with good fluorescent performence were synthesized. And then rare earth organic complex/rubber composites were prepared by in-situ reaction and electrospinning process. Besides, two new types of rare earth complexes, graphene oxide-rare earth complexes and graphene quantum dots-rare earth complexes were synthesized. The details are as followed:1. Rare earth organic complex/rubber coaxial fibers were prepared by electrospinning process. Rare earth organic synthesis process, the relationship between the structure and performance of the coaxial fibers and electrostatic spinning process conditions, vulcanization process conditions was studied. And then rare earth organic complexes/rubber nano fibers was prepared successfully. At last, the relationship between the fluorescence properties and content of rare earth complexes of coaxial fibers wwas discussed combined with Judd-Ofelt theory.2. Unsaturated rare earth organic complex/silicone rubber composites and unsaturated rare earth organic complex/nitrile rubber composites were prepared by in-situ reaction process. The influence of self-polymerization reaction and grafting reaction on the structure and luminescent property of the composites were studied. Moreover, the in-situ reaction mechanism of the influence on fluorescence performance of the composites was discussed.3. A graphene oxide-Europium (GO-Eu) organic complexes series was prepared by a solution method. The X-ray photoelectron spectroscopy analyzes verified a coordination between GO and Eu3+ions. According to the observed transmission electron microscope images and energy dispersive spectrometer analyzes, Eu3+ions could disperse uniformly on the graghene oxide nanosheets and lead to crumpled nanosheets. The introduction of appropriate organic ligand may have a positive impact on fluorescent intensity and lifetime of GO-Eu organic complexes series. 4. Graphene quantum dots-rare earth complexes were synthesized. And then the fluorescence performance was studied and the influence of rare earth ions on the fluorescence performance of graphene quantum dots was discussed.