Pyridinium dioctadecyldithiophosphate(PyDDP) modified nickel nanoparticles were prepared by chemical reduction method in water toluene mixing solution. Byusing FT IR, TG, XRD and TEM, the resultant surface modified Ni...Pyridinium dioctadecyldithiophosphate(PyDDP) modified nickel nanoparticles were prepared by chemical reduction method in water toluene mixing solution. Byusing FT IR, TG, XRD and TEM, the resultant surface modified Ni particles were characterized. The results show that the nano Ni core has an average diameter of 12nm with a fcc structure. The hydrophobic groups formed by the organic layer on the surface of Ni particles make the nanoparticles have good stability andoil solubility.展开更多
PS/TiO2 composite nanospheres were prepared in situ by seed emulsion polymerization,and the structure characterization was carried out by TEM、 UV-Vis、 FTIR、 DSC＆ TGA.The tribological behaviors of PS/TiO2 nanospher...PS/TiO2 composite nanospheres were prepared in situ by seed emulsion polymerization,and the structure characterization was carried out by TEM、 UV-Vis、 FTIR、 DSC＆ TGA.The tribological behaviors of PS/TiO2 nanospheres as additives in paraffin oil were evaluated on a four-ball machine.Experimental results indicate that the PS/TiO2 composite nanospheres have a good anti-wear performance.展开更多
Porous anodic aluminum oxide（AAO） templates, obtained by anodization of aluminum sheets at relatively high voltages, were used for fabricating branched platinum nanowires which copy the three-dimensional branching s...Porous anodic aluminum oxide（AAO） templates, obtained by anodization of aluminum sheets at relatively high voltages, were used for fabricating branched platinum nanowires which copy the three-dimensional branching structure of the nanochannels in the template. The formation of these branched nanochannels is the characteristic of AAO templates grown at 60 V in 0.15 mol/L H2C2O4 solution. When AAO templates are grown at 40 V or lower, straight channels and platinum nanowires are obtained. Platinum nanowires array was alter-current（AC）-electrodeposited in AAO at a lower frequency（20 Hz） and increasing voltage（5-15 V）. Compared with traditional AC electrodeposition condition, the deposition rate of platinum nanowires under this condition is slower and more controllable. Therefore, the platinum nanowires can perfectly copy the structure of the template. The as-obtained Al/AAO/Pt composite and branched platinum nanowires were characterized by X-ray diffraction（XRD） and transmission electron microscope（TEM）, respectively.展开更多
Oleate/PSt/TiO 2 nanosphere composites were prepared by seeding polymerization and characterized by TEM、FTIR、DSC and TGA. The antiwear ability of the oleate/PSt/TiO 2 nanospheres as additives in base oil was evaluat...Oleate/PSt/TiO 2 nanosphere composites were prepared by seeding polymerization and characterized by TEM、FTIR、DSC and TGA. The antiwear ability of the oleate/PSt/TiO 2 nanospheres as additives in base oil was evaluated. The results indicate the oleate/PSt/TiO 2 nanosphere composites have good wear and extreme pressure resistance.展开更多
文摘Pyridinium dioctadecyldithiophosphate(PyDDP) modified nickel nanoparticles were prepared by chemical reduction method in water toluene mixing solution. Byusing FT IR, TG, XRD and TEM, the resultant surface modified Ni particles were characterized. The results show that the nano Ni core has an average diameter of 12nm with a fcc structure. The hydrophobic groups formed by the organic layer on the surface of Ni particles make the nanoparticles have good stability andoil solubility.
文摘PS/TiO2 composite nanospheres were prepared in situ by seed emulsion polymerization,and the structure characterization was carried out by TEM、 UV-Vis、 FTIR、 DSC＆ TGA.The tribological behaviors of PS/TiO2 nanospheres as additives in paraffin oil were evaluated on a four-ball machine.Experimental results indicate that the PS/TiO2 composite nanospheres have a good anti-wear performance.
文摘Porous anodic aluminum oxide（AAO） templates, obtained by anodization of aluminum sheets at relatively high voltages, were used for fabricating branched platinum nanowires which copy the three-dimensional branching structure of the nanochannels in the template. The formation of these branched nanochannels is the characteristic of AAO templates grown at 60 V in 0.15 mol/L H2C2O4 solution. When AAO templates are grown at 40 V or lower, straight channels and platinum nanowires are obtained. Platinum nanowires array was alter-current（AC）-electrodeposited in AAO at a lower frequency（20 Hz） and increasing voltage（5-15 V）. Compared with traditional AC electrodeposition condition, the deposition rate of platinum nanowires under this condition is slower and more controllable. Therefore, the platinum nanowires can perfectly copy the structure of the template. The as-obtained Al/AAO/Pt composite and branched platinum nanowires were characterized by X-ray diffraction（XRD） and transmission electron microscope（TEM）, respectively.
文摘Oleate/PSt/TiO 2 nanosphere composites were prepared by seeding polymerization and characterized by TEM、FTIR、DSC and TGA. The antiwear ability of the oleate/PSt/TiO 2 nanospheres as additives in base oil was evaluated. The results indicate the oleate/PSt/TiO 2 nanosphere composites have good wear and extreme pressure resistance.
