1. College of Materials Science and Engineering Chongqing University Chongqing 400030 P. R. China
2. Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology Yangtze Normal University Chongqing 408000 P. R. China
3. College of Pharmaceutical and Biological Engineering Shenyang University of Chemical Technology Shenyang 110020 P. R. China