Showing papers in "China Wood Industry in 2014"
Journal Article•
TL;DR: In this article, a microwave-assisted liquefaction of poplar wood with polyhydric alcohols was investigated, and the results indicated that microwave heating is a promising effective alternative method for traditional heating in wood poly-hydric al- alcohol liquidefaction, and that the optimal conditions for microwave assisted wood-based PU foams were as follows:moisture content 4.7%,microwave power 500 W, polyol to wood ratio 2.5, liquefaction time 15 min.
Abstract: Poplar was liquefied using the mixed solvents of PEG 400/glycerol catalyzed by sulfuric acid under microwave heating,and liquefied wood-based polyurethane foams(PU)were prepared from the liquefied wood products and 4,4′-methylene-diphenylene isocyanate.The results indicate that microwave heating is a promising effective alternative method for traditional heating in wood polyhydric alcohol liquefaction.The optimal conditions for microwave-assisted liquefaction of poplar wood with polyhydric alcohols are as follows:moisture content 4.7%,microwave power 500 W, polyol to wood ratio 2.5,liquefaction time 15 min.The liquefied wood-based PU foams showed apparent density of 0.038g/cm3 and compressive strength of 68kPa respectively.
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