Li M.-C.,Zhejiang University of Technology |
Yi J.-M.,Zhejiang University of Technology |
Lu J.-J.,Zhejiang University of Technology |
Li J.,Zhejiang University of Technology |
Zhao W.-J.,Zhejiang Research Institute of Chemical Industry Ltd.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2014
Micro-FTIR mapping technology was used to monitor the amount and distribution of Mg(OH)2 on the anodic coating of magnesium alloy which was immersed in the 7.3 Wt% Na2SO4 solution for different time. In the solution, part of the MgO on the surface of the Mg alloy could gradually transform into Mg(OH)2 which could be detached from the Mg alloy surface and dissolved into the solution. With immersion time of 2 h in 7.3 Wt% Na2SO4 solution 2h, FTIR mapping results showed that FTIR absorption signal of Mg(OH)2 was strongest and Mg(OH)2 was most on the surface of the anodic coating. After 4 hours, the content of Mg(OH)2 began to decrease, and the Mg alloy was etched gradually. The FTIR mapping results of another component Al2O3 with immersion time were almost similar to those of Mg(OH)2. The impedance of the oxide film was also analyzed using electrochemical impedance spectroscopy. It showed that the impedance changed with the immersion time and conformed to the corrosion law of the oxide coating. This research has a good guidance and application value for characterization of the anodic coating on magnesium alloy. Source
Zhou X.-F.,Xian Jiaotong University |
Zhao X.-M.,Xian Jiaotong University |
Guo Z.-K.,Zhejiang Research Institute of Chemical Industry Ltd. |
Liu Z.-G.,Xian Jiaotong University
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2012
A program was developed to calculate volumetric adiabatic exponent and temperature adiabatic exponent based on P-R equation. This program was used to calculate adiabatic exponent of HFC-161, HC-290 and HC-600a, graph lines which describe the relationships between volumetric adiabatic exponent, temperature adiabatic exponent and reduced pressure, reduced temperature were drawn. After comparison and analysis, both adiabatic exponents of HC-600a were smaller, thus it is more suitable for alternative refrigerant under the same import and export condition of compressor. Source
Yao C.-Q.,Xian Jiaotong University |
Zhao X.-M.,Xian Jiaotong University |
Guo Z.-K.,Zhejiang Research Institute of Chemical Industry Ltd.
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2014
According to the transient hot wire method, a new apparatus was designed for measurement of thermal conductivity. The experiment system was tested with the standard matter nitrogen. And it indicated that the results measured by the new apparatus were accurate and reliable. The thermal conductivity of gaseous HFC161 was measured over the temperature range from 253 K to 373 K and at pressure from 139.9 kPa to 4470.3 kPa. The results were fitted by a polynomial as a function of temperature and pressure for future research. Source
Zhao W.,Zhejiang Research Institute of Chemical Industry Ltd.
Asian Journal of Chemistry | Year: 2014
Electrochemical reductive dehalogenation reactions of ortho-halogenated phenols, namely, o-iodophenol (OIP), o-bromphenol (OBP) and o-chlorophenol (OCP) on Ag electrode in alkaline medium have been studied by in situ FTIR combined with cyclic voltammetry and computational calculations. The Ag electrode showed a high electrochemical activity for dehalogenation reactions of OBP and OIP in contrast with OCP under the similar conditions and the dehalogenation potential of OIP was more positive than OBP, reflecting more facile reduction of OIP on Ag electrode. On the basis of in situ FTIR of OCP on Ag electrode, it was not obvious and the electrochemical reduction reaction was quite weak. Therefore, the order of electrochemical reductive dehalogenation was OIP > OBP > OCP. Source
Su C.,Cooperation Technology |
Yang F.,Cooperation Technology |
Ye Y.,Cooperation Technology |
Xu L.,Zhejiang Research Institute of Chemical Industry Ltd. |
And 2 more authors.
Journal of the Electrochemical Society | Year: 2013
In this work, two poly[tris(thienylphenyl)amine] derivatives, poly[tris(4-(2-thienyl)phenyl)amine] (PPT1N) and poly[4,4,4- tris(bithienylphenyl)amine] (PPT2N) are successfully synthesized. And the chemical structure and electrochemical performance of the prepared materials are characterized by 1H NMR, UV-vis, FT-IR spectra and galvanostatic charge-discharge testing by simulated lithium ion half-cell method. The results show that the introduction of thiophene units as both electrochemically redox active moieties and "bridge" linkage into polytriphenylamine benefits the charge carrier transportation along molecular chain and optimizes the particle morphology of the resulting polymers. As a result, the obtained polymers, as cathode materials for lithium ion batteries exhibit improved specific capacity, cycling stability and rate capability, compared to that of polytriphenylamine-based cathode. Especially, the PPT1N-based electrode demonstrates a higher specific capacity of 129.3 mAh g-1 and retains over 83% of the initial capacity with a 10 times increase in the current from 50 to 500 mA g-1. These enhanced electrochemical performances are partly attributed to the introduction of electrochemically redox active thiophene units, the improved charge carrier transportation and the improved spherical micro-morphology. © 2013 The Electrochemical Society. Source