1. a Advanced Engineered Wood Composites (AEWC) Center, University of Maine, Orono, ME 04469, USA; Centro de Investigación de Polímeros Avanzados-CIPA, Universidad de Concepción, Edmundo Larenas 234, Concepción, Chile
2. b Advanced Engineered Wood Composites (AEWC) Center, University of Maine, Orono, ME 04469, USA
3. c Laboratory for Surface Science and Technology, University of Maine, Orono, ME 04469, USA
4. d Department of Chemical and Biological Engineering, University of Maine, Orono, ME 04469, USA