Biocomposite from polylactic acid and lignocellulosic fibers: Structure-property correlations

G. Faludi, G. Dora, K. Renner, J. Móczó, B. Pukánszky

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

PLA biocomposites were prepared using three corn cob fractions and a wood fiber as reference. The composites were characterized by tensile testing, scanning electron microscopy (SEM) and polarization optical microscopy (POM). Micromechanical deformation processes were followed by acoustic emission measurements. The different strength of the components was proved by direct measurements. Two consecutive micromechanical deformation processes were detected in composites containing the heavy fraction of corncob, which were assigned to the fracture of soft and hard particles, respectively. The fracture of soft particles does not result in the failure of the composites that is initiated either by the fracture of hard particles or by matrix cracking. Very large particles debond easily from the matrix resulting in catastrophic failure at very low stresses. At sufficiently large shear stresses large particles break easily during compounding, thus reinforcement depending on interfacial adhesion was practically the same in all composites irrespectively of initial fiber characteristics.

Original languageEnglish
Pages (from-to)1767-1775
Number of pages9
JournalCarbohydrate Polymers
Volume92
Issue number2
DOIs
Publication statusPublished - Feb 15 2013

Fingerprint

Acids
Fibers
Composite materials
Tensile testing
Acoustic emissions
Optical microscopy
Shear stress
Wood
Reinforcement
Adhesion
Polarization
Scanning electron microscopy
poly(lactic acid)

Keywords

  • Agricultural waste
  • Failure mechanism
  • Fiber structure
  • Local deformations
  • PLA/wood biocomposites

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Biocomposite from polylactic acid and lignocellulosic fibers : Structure-property correlations. / Faludi, G.; Dora, G.; Renner, K.; Móczó, J.; Pukánszky, B.

In: Carbohydrate Polymers, Vol. 92, No. 2, 15.02.2013, p. 1767-1775.

Research output: Contribution to journalArticle

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