Influence of pulp bleaching and compatibilizer selection on performance of pulp fiber reinforced PLA biocomposites

Research output: Contribution to journalArticle

Researchers

Research units

  • VTT Technical Research Centre of Finland
  • University of Jyvaskyla

Abstract

This article focuses on the effect of pulp bleaching and emerging commercial compatibilizers on physical performance of pulp fiber reinforced poly(lactic acid) (PLA) biocomposites. Industrially bleached and unbleached hardwood kraft pulp fibers are treated with several additive types, and compounded with PLA to fiber content of 30 wt %. After injection molding, the produced biocomposites are evaluated by their mechanical performance and fiber–matrix adhesion. For selected materials, fiber surface and fiber properties are reflected to composite performance by analyzing the compositions, dimensions, and lignin coverage of original fibers, as well as fiber dispersion and dimensions after melt processing. As a conclusion, unbleached kraft pulp fibers provide significant improvement in physical properties of PLA/pulp fiber composites. Of the screened compatibilizers, epoxidated linseed oil has a clear positive effect on performance when bleached kraft pulp fibers are used. The improvements correspond to enhanced fiber–matrix adhesion and differences in remaining fiber length distributions.

Details

Original languageEnglish
Article number47955
JournalJournal of Applied Polymer Science
Volume136
Issue number37
Publication statusPublished - 1 Jan 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • adhesion, biocomposite, poly(lactic acid), pulp fibers, wood-based fibers

ID: 34379412