1. National Green Coating Equipment and Technology Research Centre, Lanzhou Jiaotong University, Lanzhou 730070, P. R. China
2. Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, P. R. China
3. State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
4. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China