Fully bio-based thermomechanical pulp and bleached pulp reinforced thermoplastic lignin composites: A comparative study

Antti Ojala, Lisa Wikström, Kalle Nättinen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

Fully renewable thermoplastic lignin composites were fabricated. Wood fibre reinforced soft-wood kraft lignin, plasticised with starch acetate (Ac-starch) and triethyl citrate (TEC), was processed in pilot scale using twin-screw extrusion and injection moulding techniques. Thermomechanical pulp (TMP) and bleached pulp (BP) were used as the reinforcements. Thermal properties of the materials were analysed with TGA and DSC methods and the produced tensile test specimens were mechanically tested. Based on the thermal analysis of the melt mixture of lignin, Ac-starch and TEC, the components are thermodynamically fully compatible and form a single phase upon melt mixing. Fibre reinforcements were observed to significantly improve the mechanical properties of the composites. Further, the performance of the BP reinforced composites was better than the one with TMP fibres. The developed fully bio-based thermoplastic lignin composites demonstrate comparable tensile properties with typical wood plastic composites (WPCs) i.e. wood fibre reinforced polylpropylene (PP) and polylactic acid (PLA)
Original languageEnglish
Title of host publicationProceedings for the 17th international symposium on wood, fibre and pulping chemistry
PublisherPulp and Paper Technical Association of Canada
Publication statusPublished - 2013
MoE publication typeNot Eligible
Event17th International Symposium on Wood, Fibre and Pulping Chemistry, ISWFPC 2013 - Vancouver, Canada
Duration: 12 Jun 201314 Jun 2013

Conference

Conference17th International Symposium on Wood, Fibre and Pulping Chemistry, ISWFPC 2013
Abbreviated titleISWFPC 2013
CountryCanada
CityVancouver
Period12/06/1314/06/13

Keywords

  • Thermoplastic lignin
  • thermomechanical pulp
  • bleached pulp
  • starch acetate
  • composite

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    Ojala, A., Wikström, L., & Nättinen, K. (2013). Fully bio-based thermomechanical pulp and bleached pulp reinforced thermoplastic lignin composites: A comparative study. In Proceedings for the 17th international symposium on wood, fibre and pulping chemistry Pulp and Paper Technical Association of Canada.