Highly compatible wood thermoplastic composites from lignocellulosic material modified in ionic liquids: Preparation and thermal properties

Haibo Xie, Paula Jarvi, Mikko Karesoja, Alistair King, Ilkka Kilpelainen, Dimitris S. Argyropoulo

Research output: Contribution to journalArticleScientificpeer-review

40 Citations (Scopus)

Abstract

A study of converting chemically modified wood into thermoplastic materials was undertaken to develop a new technology platform for the effective utilization of wood-based lignocellulosic materials. Highly substituted benzoylated spruce thermomechanical pulp (TMP) and lauroylated spruce TMP were used as components for thermoplastic composites of poly(styrene) and poly(propylene). Scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and dynamic mechanical thermal analysis (DMTA) were used to characterize the interfacial morphology and thermal properties of the resultant composite filaments. The coupling of the interfacial morphology effort and that of torque analysis applied during processing indicated that the thorough modification of wood fibers by benzoylation and/or lauroylation reactions can improve the compatibility betwee the wood-based lignocellulosic materials and poly(styrene) and poly(propylene). Thermal analysis showed that, with the addition of wood derivatives into poly(styrene) and poly(propylene) matrices, a slight decrease in their Tgs was observed. Furthermore, all of the prepared composites showed improved thermal stability, as revealed by TGA. The resultant thermoplastic wood composites exhibited good melting properties and were readily extruded into filaments or sheets.

Original languageEnglish
Pages (from-to)2468-2476
Number of pages9
JournalJournal of Applied Polymer Science
Volume111
Issue number5
DOIs
Publication statusPublished - 5 Mar 2009
MoE publication typeA1 Journal article-refereed

Keywords

  • Cellulose
  • Differential scanning calorimetry
  • Dynamic mechanical thermal analysis
  • Ionic liquids
  • Lignin
  • Lignocellulose
  • Materials
  • Melt extrusion
  • Polymer composites
  • Thermal analysis
  • Thermogravimetric analysis

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