Interlaminar improvement of carbon fiber/epoxy composites via depositing mixture of carbon nanotubes and sizing agent

- COOH-CNTs can react with sizing agent, and the optimum reaction ratio was 1:20.
- Carbon fibers were dipped into the mixture bath of CNTs and sizing agent.
- SEM results indicate that fibers surfaces were coated with CNTs and sizing agent.
- ILSS was increased by 67.01% for the composites after the mixture coating process.
- Single fibers tensile strength was maintained after the deposited process.