title: Atmospheric pressure liquefaction of dried distillers grains (DDG) and making polyurethane foams from liquefied DDG.
abstract: In this study, dried distillers grains (DDG) was liquefied in acidic conditions at atmospheric pressure, and polyurethane foams were subsequently prepared from the liquefied DDG. Liquefaction was examined over a range of conditions including liquefaction time of 1-3 h, temperature of 150-170 degrees C, sulfuric acid (as catalyst) concentration of 1.0-3.0 wt%, and liquefaction solvent (ethylene carbonate) to DDG ratio of 3:1-5:1. The bio-polyols in the liquefied DDG were rich in hydroxyl groups, which can react with methylene diphenyl diisocyanate (MDI) to form cross-linked polyurethane networks. The biodegradability of the prepared polyurethane foams was also evaluated. This study strives to broaden the application of DDG as a feedstock for bio-polyurethane preparation.
authors.affiliation: Department of Forest Products, Mississippi State University, Box 9820, Mississippi State, MS, 39762, USA.
authors.forename: Fei
authors.initials: F
authors.lastname: Yu
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Le
authors.forename: Paul
authors.initials: P
authors.lastname: Chen
authors.forename: Yuhuan
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Lin
authors.forename: Roger
authors.initials: R
authors.lastname: Ruan
mesh_terms: D001274:Atmospheric Pressure; D005591:Chemical Fractionation / Q000379:methods*; D002523:Edible Grain / Q000737:chemistry*; D005740:Gases / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D012996:Solutions
chemical_list: D005740:Gases; D011140:Polyurethanes; D012996:Solutions