Interlaminar Toughening of Epoxy Carbon Fiber Reinforced Laminates: Soluble Versus Non-Soluble Veils

Giulia Ognibene, Alberta Latteri, Salvatore Mannino, Lorena Saitta, Giuseppe Recca, Fabrizio Scarpa, Gianluca Cicala

Research output: Contribution to journalArticle (Academic Journal)peer-review

9 Citations (Scopus)
161 Downloads (Pure)


This work describes the evaluation of different interlaminar veils to improve the toughening of epoxy/carbon fiber composites manufactured by resin infusion. Three commercial veils have been used in the study: two electro spun thermoplastic nanofiber (Xantulayr® from Revolution Fibres) with different areal weight, and one micro carbon fibers veil (Optiveil® from TFP). Two laboratory made veils were also manufactured by electrospinning commercial polyethersulfone (PES) tougheners (Virantage by Solvay). The veils were selected to be either soluble or non-soluble in the epoxy resin matrix during curing. The solubility was analyzed by scanning electron microscopy and dynamic mechanical analysis testing on the cured laminates. The fracture energy was evaluated by double cantilever bending (DCB) testing under Mode I loading. The insoluble thermoplastic nanofibers showed the highest toughening efficiency, followed by the soluble nanofiber veils. The carbon fiber based veil showed no toughness improvement.

Original languageEnglish
Article number1029
Number of pages14
Issue number6
Publication statusPublished - 11 Jun 2019


  • Composites
  • Electrospinning
  • Epoxy
  • Interlaminar toughening


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