Physicochemical characterization of lignin recovered from microwave-assisted delignified lignocellulosic biomass for use in biobased materials

  • Authors: Xie, Jiulong; Hse, Chung-Yun; Shupe, Todd F.; Hu, Tingxing
  • Publication Year: 2015
  • Publication Series: Scientific Journal (JRNL)
  • Source: Journal of Applied Polymer Science
  • DOI: 10.1002/app.42635

Abstract

Lignocellulosic biomass (Moso Bamboo, Chinese tallow tree wood, switchgrass, and pine wood) was subjected to a novel delignification process using microwave energy in a binary glycerol/methanol solvent. The physicochemical properties of the recovered lignin were analyzed prior to its application in the fabrication of polylactic acid (PLA)–lignin composites. The results showed that the samples had a high Klason lignin content (>75%) and retained their natural structure. Thermogravimetric analysis revealed that the recovered lignin exhibited a different thermal decomposition pattern from that of commercial lignins. All the recovered lignins had good solubility in common organic solvents (acetone, 1,4-dioxane, THF, DMSO, and ethanol/water) and 1 mol/L NaOH solution. The addition of lignin into the PLA matrix resulted in the improvement in tensile properties of PLA–lignin composites. PLA films with low lignin content had good UV light-resistant properties, indicating that the recovered lignin has potential in packaging of light-sensitive products.

  • Citation: Xie, Jiulong; Hse, Chung-Yun; Shupe, Todd F.; Hu, Tingxing 2015. Physicochemical characterization of lignin recovered from microwave-assisted delignified lignocellulosic biomass for use in biobased materials. Journal of Applied Polymer Science. 132(40).
  • Keywords: lignocellulosic biomass; lignin; microwave delignification; poly lactic acid
  • Posted Date: September 14, 2015
  • Modified Date: November 16, 2016
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