Adhesion promotion by ESI deposition of thin polymer layers onto carbon fibers

作者：Friedrich Joerg F^*; Wettmarshausen Sascha; Altmann Korinna; Hidde Gundula

来源：Surface Innovations, 2015, 3(4): 215-227.

DOI：10.1680/jsuin.15.00012

• adhesion
• coating
• composite materials

Thin coatings of high-molecular weight poly(acrylic acid) (PAA) and poly(hydroxyethyl methacrylate) were deposited onto carbon fibers by means of atmospheric electrospray ionization (ESI) as adhesion promoters in carbon fiber-epoxy resin composites. The carbon fibers were completely wrapped by pinhole-free polymer coatings in the upper 10 plies of a carbon fiber roving (corresponding to 50-100 mu m) as verified with scanning electron microscopy ('electrophoretic effect'). The polymer films have either a granular or a smooth structure depending on the absence or presence of residual solvent in the deposit. The ESI-deposited PAA films did not show any changes in composition and structure referenced to commercial PAA as analyzed by X-ray photoelectron spectroscopy and matrix-assisted laser desorption ionization time-of-flight mass spectrometry. Single fiber pull-out tests demonstrated significantly increased adhesion of coated carbon fibers to epoxy resin. It is assumed that chemical bonds between carbon fiber-PAA and epoxy resin contribute significantly to the improved interactions.

• 出版日期2015-12