Preparation of bio-polyols by liquefaction of hardwood residue and their application in the modification of polyurethane foams

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• 作者：Xianzhe Lu 鹿现哲 ; Yingchun Wang ; Yizhuan Zhang…
• 刊名：Journal of Wuhan University of Technology--Materials Science Edition
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：31
• 期：4
• 页码：918-924
• 全文大小：960 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Chinese Library of Science
  
• 出版者：Wuhan University, co-published with Springer
• ISSN：1993-0437
• 卷排序：31

文摘

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.Key wordsliquefactionbio-polyolsbiomass residueslignocellulosenatural polymerpolyurethane foams