1. School of Electromechanical Engineering
2. Key Laboratory of Polymer Material Advanced Manufacturing’s Technology of Shandong Province
3. Qingdao University of Science and Technology
4. Qingdao
5. China
6. College of Sino-German Science and Technology
7. Qingdao 266061
8. P. R. China
9. State Key Laboratory Base of Eco-chemical Engineering
10. School of Chemistry and Molecular Engineering