1. Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China
3. CREPEC, Department of Chemical Engineering, École Polytechnique de Montréal, Montréal, Québec H3C 3A7, Canada