Abstract
Disk refining and ultrasonication treated sugarcane bagasse residues reclaimed from the waste stream of a simplified bioethanol process after fermentation were used to fabricate biobased composites with poly(vinyl alcohol) (PVA) by film casting. The morphologies and the size distributions of residue particles were characterized by scanning electronic microscopy and various particle size analyzers. The results showed that the residue particle sizes were about hundreds nanometers to tens microns after disk refining treatment. After further treatment by ultrasonication, the particle sizes ranged from about tens of nanometers to several microns. The treated residues were expected to have a large surface area to reinforce PVA. The results indicated that the addition of treated fermentation residues significantly increased the tensile modulus of neat PVA with minimal impact on tensile strength. Furthermore, the PVA composites had higher thermal degradation temperature compared to neat PVA.
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Acknowledgments
This project was supported by Biomass Research & Development Initiative Competitive Grant no. 2011-10006-30358 from the USDA National Institute of Food and Agriculture and Institute of Food and Agricultural Sciences (IFAS) Start-up funding at the University of Florida. The authors also thank the experimental help from Dr. Wade Yang about ultrasonication process at the Department of Food Science and Human Nutrition, Dr. Eric McLamore about Multisizer analysis at the Department of Agricultural and Biological Engineering, and SEM measurements at the Major Analytical Instrumentation Center, University of Florida. We also would like to acknowledge Qianqian Wang, a visiting Ph.D. student at US Forest Service, Forest Products Laboratory, from South China University of Technology, for carrying out disk refining of the bagasse residue.
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Cheng, Q., Tong, Z., Dempere, L. et al. Disk Refining and Ultrasonication Treated Sugarcane Bagasse Residues for Poly(Vinyl Alcohol) Bio-composites. J Polym Environ 21, 648–657 (2013). https://doi.org/10.1007/s10924-012-0562-y
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DOI: https://doi.org/10.1007/s10924-012-0562-y