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The visualization analysis of dispersion state of the filler m silicone rubber was based on the fluorescent labeling and the laser scanning confocal microscope. The fluorescent silica microspheres were modified by different silane coupling agents, and the contact angle analysis, thermogravimetnc analysis and fluorescence spectroscopy were used to describe its surface properties. Both hydrophobic effect and bound rubber content of modified fluorescent silica microspheres are KH-570>KH-560>KH-550. Visual analysis results show that the aver- age size of aggregates and network connectivity of KH-570 modified fluorescent silica microspheres were 2.61 ̡m and 47%, KH-560 modified it were 2.95 /im and 43% and KH-550 modified it were 3.32 f(m and 41 %. The visual analysis method of the modified fluorescent SiO2 microsphere is beneficial to observe the dispersion state of it m the silicone rubber, and this method can statistically analyze the particle size of the modified fluorescent SiO2 microsphere aggregates. This method is helpful to evaluate the dispersion state of the filler m the silicone rubber. [ABSTRACT FROM AUTHOR]

Fe3O4 nanoparticles were synthesized by co-precipitation method. 3D graphene was modified on the surface of Fe3O4 nanoparticles, and then covered with tetraethyl orthosilicate(TEOS) and vinyltrimethoxysilane (VTMO). Finally, the magnetic functional material Fe3O4@3DG@VTMO@MPS was synthesized by the polymerization of functional monomer 3-mercapto-1-propanesulfonate(MPS) on the surface using "thiol-ene" click chemistry. The structure, morphology and thermal stability of the functional materials were characterized by scanning electron microscopy(SEM), energy dispersive spectroscopy (EDS), dynamic light scattering (DLS), Fourier transform infrared spectroscopy(FLlR) and thermogravimetric analysis(TGA), respectively. The adsorption properties of this functional material for Lysozyme were studied by static adsorption experiments. The results show that the magnetic functional materials had nice adsorption capacity (the maximum adsorption capacity was 162.1 mg/g) and fast adsorption kinetics(the adsorption equilibrium could be reached in 150 min). The pseudo-second-order kinetic model was suitable for describing the adsorption kinetics of lysozyme on functional materials, and the adsorption process of functional materials on lysozyme was more in line with Langmuir adsorption model, indicating that adsorption is monolayer adsorption. Fe3O4@3DG@VTMO@MPS as solid phase extraction materials as solid phase extraction materials could be used for separation and enrichment of lysozyme, then combined with high performance liquid chromatography (HPLC) to detect honey in actual samples. [ABSTRACT FROM AUTHOR]

The filler network structure of the silica-reinforced silicone rubber was simulated by using the rare earth europium complex sensitized fluorescence enhancement technique. The filler network structure, curing performance and dynamic mechanical properties of the silica-reinforced silicone rubber were characterized by scanning electron microscopy, laser scanning confocal microscopy, rubber processing analyzer and solid rheological analyzer. The filler network connection rates of 30-60 parts of silica-filled silicone rubber were 31 %, 41 %, 58% and 70%, respectively, visualized by laser scanning confocal microscopy. The minimum torque (ML), characterization of filler-filler interaction, during the vulcanization process, the Payne effect and the shear storage modulus difference ΔG'(G'0--G'∞) in the strain sweep process were gradually increased. The results show that the filler network structure is gradually formed inside the silicone rubber with the increase of fillers, which is consistent with the obtained filler network connection rate, indicating that the combination of fluorescent labeling and laser scanning confocal microscopy can realize the visualization of the filler network structure in the silicone rubber. [ABSTRACT FROM AUTHOR]