1. Key
Laboratory for Liquid-Solid Structural Evolution and Processing of
Materials (Ministry of Education), School of Materials Science and
Engineering, Shandong University, Jinan, Shandong 250061, P. R. China
2. Microcellular
Plastics Manufacturing Laboratory, Department of Mechanical and Industrial
Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada
3. Key
Laboratory of Chinese Education Ministry for Tropical Biological Resources, Hainan University, Haikou, Hainan 570228, P. R. China
4. School
of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, P. R. China