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Deng S.-H.,Central South University | Yang X.,Central South University | Yang X.,Key Laboratory of Nonferrous Metal | Wang M.,Central South University | And 2 more authors.
International Journal of Structural Integrity | Year: 2015

Purpose - The purpose of this paper is to improve anti-corrosion, self-cleaning, hydrophily and sterilization properties of aluminum (Al) alloy. Design/methodology/approach - A multifunctional coating for medical external application on Al alloy had been prepared by anodic oxidation, electrolytic coloring silver (Ag) and sealed in boiling water with nano-sized titanium dioxide (TiO2) particles. The multifunctional coating was characterized by X-ray diffraction, scanning electron microscope and energy dispersive spectroscopy. Other properties such as corrosion-resistance, wipe-resistance, hydrophilicity, photochemical decomposition and bactericidal antiseptic effect were also investigated. Findings - The results demonstrate that a golden film with multi-function had been obtained for medical external application. The main phase of coating is amorphous Al2O3, and nano-sized silver particle is electrodeposited in bottom of film hole, while nano-sized TiO2 is sealed on the external surface of coating. The properties of film, such as anti-corrosion, self-cleaning, hydrophily, sterilization are better than those of Al alloy substrate. Originality/value - Considering about this usage for medical external application, a multifunctional coating which has the properties such as decoration, anti-corrosion, sterilize and self-cleaning has been first prepared on Al alloy surface in the study. This coating would meet the requirements of medical external using and provide theoretical and practical foundation about Al alloy for medical use. ©Emerald Group Publishing Limited. Source


Deng S.-H.,Central South University | Deng S.-H.,Key Laboratory of Nonferrous Metal | Chen J.,Central South University | Wang Z.-S.,Central South University | And 7 more authors.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2010

The optimum condition of heat treatment of conductive polyaniline doped by H2SO4(p-type PANI) was confirmed by orthogonal design 3 levels with 4 factors. The characterization of PANI was studied by X-ray diffraction(XRD), differential thermal analysis(DTA) and conductivity testing method. The optimum condition of heat treatment of PANI doped by H2SO4 is 175°C and 8 hours, and at this condition, the conductivity and crystallinity is reached at 4.926 S/cm and 28.94% respectively. The results show that crystallinity, conductivity, and thermal stablility of PANI are enchanced due to the change of expanding coil configuration for doped PANI molecular chain by heat treatment, which improves the performance of PANI solar cell. Source

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