Journal
COMPOSITES PART B-ENGINEERING
Volume 116, Issue -, Pages 451-458Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2016.10.088
Keywords
Carbon fiber; Hydrogen plasma treatment; Carbon fiber reinforced plastics; Carbon bond restructure
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The surfaces of carbon fibers were modified by hydrogen plasma treatment to investigate the consequent effects on reinforcement of polyetherimide (PEI) composites. The structural surface properties were characterized by Raman spectroscopy, XPS, FT-IR and SEM. The effectiveness of hydrogen and oxygen plasma treatments in improving the surface roughness, structure and mechanical properties of the composites was demonstrated. The results indicated that hydrogen and oxygen plasma treatment modified the carbon bonding structure and the surface roughness differently. Both an increase in the density of functional groups and changes in the carbon bonding contributed to the enhancement of the PEI matrix. SEM imaging confirmed decreased fiber pull-out for PEI reinforced with plasma-treated carbon fibers because of the enhanced adhesion between the carbon fibers and the PEI. Thus, hydrogen plasma treatment of the carbon fibers led to an enhancement of tensile properties at both room temperature and high temperature (150 degrees C). This study demonstrates that hydrogen plasma treatment is a promising technique for improving the mechanical properties of carbon-fiber-reinforced polymer composites. (C) 2016 Elsevier Ltd. All rights reserved.
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