1. Key Lab of Biobased Polymer Materials of Shandong Provincial Education Department, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
2. Gastroenterology Department, The Affiliated Hospital of Qingdao University, Qingdao 266000, P.R. China
3. College of Material Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
4. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China