Journal
BIORESOURCES
Volume 13, Issue 2, Pages 3346-3361Publisher
NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI
DOI: 10.15376/biores.13.2.3346-3361
Keywords
Thermal stability; Polyurethane foam; Liquefaction; Microwave liquefaction; Solid residue
Categories
Funding
- Fundamental Research Funds for the Central Non-profit Research Institution of Chinese Academy of Forestry [CAFYBB2018MA006]
- USDA Forest Service Wood Innovations Funding Opportunity program [15-DG-11083150-054]
- USDA National Institute of Food and Agriculture, McIntire-Stennis project [94118]
- China Scholarship Council
- National Natural Science Foundation of China [31700578]
- Open Fund of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, China [KF201722]
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The thermal stabilities of bio-based polyurethane (PU) foams made from liquefaction bio-polyols with and without solid residue were analyzed by thermogravimetric analysis (TGA) and Fourier transform infrared spectrometry (FTIR). Yaupon holly (Ilex vomitoria) was subjected to microwave liquefaction at different reaction temperatures to characterize the variations of bio-polyol and solid residue with temperature. The results indicated that the solid residue decreased when the temperature increased from 120 degrees C to 160 degrees C, while it increased slightly when further increasing temperature to 200 degrees C. The hydroxyl number decreased with increased reaction temperature. The TGA of PU foams demonstrated that the use of liquefaction bio-polyol with and without solid residue to produce PU foam increased the thermal stability of biofoams as compared with petro-based foam. Moreover, the presence of solid residue in bio-polyol enhanced the thermal stability of biofoams. The FTIR analysis of PU foams suggested that the solid residue had a negative effect on the formation of urethane bonds.
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