1. State Key Laboratory of Heavy Oil Processing College of Chemical Engineering China University of Petroleum (East China) Qingdao 266580 P. R. China
2. Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province School of Materials Science and Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
3. Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry & Chemical Engineering Shaanxi Normal University Xi'an Shaanxi 710062 P. R. China
4. Institute of New Energy China University of Petroleum (East China) Qingdao 266580 P. R. China