Journal
BIORESOURCES
Volume 12, Issue 4, Pages 8653-8671Publisher
NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI
DOI: 10.15376/biores.12.4.8653-8671
Keywords
Polyurethane foam; Lignin; Cross-linking; Mechanical properties; Kinetic model
Categories
Funding
- China Postdoctoral Science Foundation [2017T100633, 2016M602472]
- National Natural Science Foundation of China [31600471]
- Natural Science Foundation of Guangdong Province [2015A030310369, 2015A030313221]
- National Key Research and Development Plan [2017YFB0307902]
- 111 Plan and Guangdong Provincial Science and Technology Plan Projects [2015B020241001]
- Science and Technology Plan Projects of Guangzhou city [201504010013]
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Lignin was extracted from wheat straw and used for its crosslinking function in the synthesis of polyurethane foam (PUF). The effects of lignin's addition on the cross-linking structure and macroscopic properties of the PUFs were investigated. A morphological examination, Fourier transform infrared (FT-IR) spectroscopy, and thermogravimetric analysis (TGA) were conducted to measure the performance of the polyurethanes. Kinetic models were simulated to analyze the oily solvent adsorption mechanism of the polyurethane. The results showed that an increase in the cross-linking density was conducive to an improvement of the physical properties of the polyurethane. Moreover, the process of oily solvent adsorption was in accordance with the quasi-second-order kinetic model. Both physical and chemical adsorption occurred during the adsorption process. This work demonstrated a highly effective method for imparting PUFs with an excellent performance and proper lignin content.
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