Preparation of Bio-polyols by Liquefaction of Hardwood Residue and Their Application in the Modification of Polyurethane Foams
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2016年第4期
论文作者：鹿现哲 WANG Yingchun ZHANG Yizhuan CHENG Xiansu 于岩 靳艳巧
文章页码：918 - 924
摘 要：Hardwood residue（HR）,a byproduct of paper industry,was liquefied 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 modified 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 modified 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 firstly,and then decreased.Meanwhile,the thermal stability was improved slightly.
鹿现哲1,2，WANG Yingchun1,2，ZHANG Yizhuan1，CHENG Xiansu1，于岩1,2，靳艳巧1,2
1. College of Materials Science and Engineering,Fuzhou University2. Key Laboratory of Ecomaterials Advanced Technology(Fuzhou University)
摘 要：Hardwood residue（HR）,a byproduct of paper industry,was liquefied 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 modified 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 modified 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 firstly,and then decreased.Meanwhile,the thermal stability was improved slightly.
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