Optimized process for recovery of glass- and carbon fibers with retained mechanical properties by means of near- and supercritical fluids

Hülya U. Sokoli, Justine Beauson, Morten E. Simonsen, Anthony Fraisse, Povl Brøndsted, Erik G. Sogaard

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Degradation of hybrid fiber composites using near-critical water or supercritical acetone has been investigated in this study. Process parameters such as temperature (T= 260-300 ºC), pressure (p = 60-300 bar) and composite/solvent (c/s = 0.29-2.1 g/mL) ratio were varied to determine the effect on the resin degradation efficiency and the quality of the recovered glass and carbon fibers. Supercritical acetone at 260 ºC, 60 bar and a c/s ratio up to 2.1 g/mL could achieve nearly complete degradation of the resin. The glass fibers were recovered with up to 89% retained tensile strength compared to the virgin glass fibers. The use of near-critical water reduced the tensile strength of the glass fibers by up to 65%, whereas the carbon fibers were recovered with retained tensile strength compared to the virgin carbon fibers using water or acetone.
Original languageEnglish
JournalJournal of Supercritical Fluids
Volume124
Pages (from-to)80-89
ISSN0896-8446
DOIs
Publication statusPublished - 2017

Keywords

  • Hybrid composite
  • Recycling
  • Fiber recovery
  • Mechanical properties
  • Sustainability

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