Biocomposites Produced from Hardwood Particles by Equal Channel Angular Pressing: Effects of Pre-Treatment
Yu Bai, Xiaoqing Zhang, Kenong Xia
JOURNAL OF COMPOSITES SCIENCE | MDPI | Published : 2020
The benefit of using a combination of alkali pre-treatment and ball milling in processing hardwood particles into biocomposites via equal channel angular pressing (ECAP) was demonstrated. The penetration of bonding additives (polyethyleneimine and tannic acid) into hardwood structures was enhanced by the pre-treatment, resulting in plasticization and cross-linking derived from the additives during the particle processing. A significant improvement in the biocomposites’ mechanical properties was obtained, reaching flexural strength of 28–29 MPa and flexural modulus of 3650 MPa, comparable to those displayed by commercial wood fiberboard using thermosetting resins as the binding agent. This ad..View full abstract
We would like to thank Roger Curtain from the Bio 21 Advanced Microscopy Facility (the University of Melbourne), Allison Van De Meene from Biosciences Microscopy Unit, School of Biosciences (the University of Melbourne), Hao Wei from the School of Chemistry (the University of Melbourne), Weidong Yang from CSIRO, and Edward Lui from RMIT University for their valuable assistance with experiments. Y.B. acknowledges financial support from the Research Training Program (RTP) Scholarship and Melbourne Research Scholarship (MRS).