Journal
APPLIED SURFACE SCIENCE
Volume 276, Issue -, Pages 190-197Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2013.03.064
Keywords
PBO fibers; Atmospheric air plasma treatment; Surfaces; Interfacial adhesion
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Funding
- Youth Foundation of the 4th Academy of China Aerospace Science and Technology Corporation
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Poly(p-phenylene benzobisoxazole) (PBO) fiber was modified by atmospheric air plasma treatment. The effects of plasma treatment power and speed on both surface properties of PBO fibers and interfacial properties of PBO/epoxy composites were investigated. Surface chemical composition of PBO fibers were analyzed by X-ray photoelectron spectroscopy (XPS). Surface morphologies of the fibers and interface structures of the composites were examined using scanning electron microscopy (SEM). Interfacial adhesion property of the composites was evaluated by interlaminar shear strength (ILSS). Mechanical properties of PBO multifilament were measured by universal testing machine. The results indicate that atmospheric air plasma treatment introduced some polar or oxygen-containing groups to PBO fiber surfaces, enhanced surface roughness and changed surface morphologies of PBO fibers by plasma etching and oxidative reactions. The plasma treatment also improved interfacial adhesion of PBO/epoxy composites but has little effect on tensile properties of PBO multifilament. The ILSS of PBO/epoxy composites increased to 40.0 MPa after atmospheric air plasma treatment with plasma treatment power of 300 W and treatment speed of 6 m/min. (c) 2013 Elsevier B.V. All rights reserved.
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