【摘 要】
：
Hardwood residue (HR), a byproduct of paper industry, was liqueifed by using polyethylene glycol 400 (PEG400) and ethylene carbonate (EC) as the liquefaction solvents, and concentrated sulfuric acid as the catalyst to produce bio-polyols (HRLP), which wer
【机 构】
：
College of Materials Science and Engineering, Fuzhou University, Fuzhou 350116, China
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
Hardwood residue (HR), a byproduct of paper industry, was liqueifed by using polyethylene glycol 400 (PEG400) and ethylene carbonate (EC) as the liquefaction solvents, and concentrated sulfuric acid as the catalyst to produce bio-polyols (HRLP), which were used to synthesize polyurethane (PU) foams. The effects of conditions on the properties of HRLP and modiifed PU foams were investigated and the mechanism of biomass liquefaction was discussed. The optimum conditions of liquefaction were obtained as follows: reaction temperature of 160 °C, reaction time of 60 min, ratio of PEG400/EC of 8:2 (w/w), and ratio of liquid/solid of 5:1 (w/w). The characterization of HRLP modiifed PU foams suggested that HRLP could partially replace the petroleum polyols to synthesize PU foams. With the increase of the replacement percentage of HRLP, the apparent density and compressive strength of the foams increased ifrstly, and then decreased. Meanwhile, the thermal stability was improved slightly.
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