Influence of DBD plasma pretreatment on the deposition of chitosan onto UHMWPE fiber surfaces for improvement of adhesion and dyeing properties

The combination treatment of dielectric barrier discharge (DBD) plasma and chitosan coatings was performed on ultrahigh molecular weight polyethylene (UHMWPE) fibers in order to improve the wettability, dyeability and adhesion properties. The properties of UHMWPE fibers coated with chitosan, after being pretreated by DBD plasma, were evaluated through scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The interfacial shear strength (IFSS) between the fiber and the epoxy resin was determined using the single fiber pull-out test technique. The modified UHMWPE fibers were dyed with reactive dyes after the combined treatment. Surface wettability and dyeability were investigated by water contact angle and K/S measurement, respectively. SEM images confirmed that the chitosan was induced onto the surfaces of the UHMWPE fibers after the combined treatment. The XPS analysis showed that the oxygen and nitrogen contents of the UHMWPE fiber surfaces after the combined treatment were higher than that of the fiber modified by chitosan without DBD plasma pretreatment. Meanwhile, the UHMWPE fibers treated with combination of DBD plasma and chitosan treatment had better wettability, dyeability and adhesion property than those of the non-plasma pretreated surfaces, indicating that DBD plasma pretreatment facilitated the deposition of chitosan onto the UHMWPE surfaces. (C) 2016 Elsevier B.V. All rights reserved.