Sammanfattning

The objective of this study was to investigate the effect of pectin and hemicellulose removal from hemp fibres on the mechanical properties of hemp fibre/epoxy composites. Pectin removal by EDTA and endopolygalacturonase (EPG) removed epidermal and parenchyma cells from hemp fibres and improved fibre separation. Hemicellulose removal by NaOH further improved fibre surface cleanliness. Removal of epidermal and parenchyma cells combined with improved fibre separation decreased composite porosity factor. As a result, pectin removal increased composite stiffness and ultimate tensile strength (UTS). Hemicellulose removal increased composite stiffness, but decreased composite UTS due to removal of xyloglucans. In comparison of all fibre treatments, composites with 0.5% EDTA + 0.2% EPG treated fibres had the highest tensile strength of 327 MPa at fibre volume content of 50%. Composites with 0.5% EDTA + 0.2% EPG -> 0% NaOH treated fibres had the highest stiffness of 43 GPa and the lowest porosity factor of 0.04. (C) 2016 Elsevier Ltd. All rights reserved.

Nyckelord

Natural fibres; Polymer-matrix composites (PMCs); Mechanical properties; Porosity

Publicerad i

Composites Part A: Applied Science and Manufacturing
2016, Volym: 90, sidor: 724-735
Utgivare: ELSEVIER SCI LTD

SLU författare

• Fernando, Dinesh

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

• Daniel, Geoffrey

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Trävetenskap


Publikationens identifierare

DOI: https://doi.org/10.1016/j.compositesa.2016.08.037

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/78192