Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 52, Issue -, Pages 151-158Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2012.07.008
Keywords
Carbon fibre; Interface/interphase; Micro-mechanics; Surface treatments
Funding
- Defense Acquisition Program Administration
- Agency for Defense Development (ADD) [UD070009AD]
- BK21 program
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A novel process of atmospheric pressure plasma treatment was performed, on powdered carbon nanotube (CNT) in water, to modify reinforcing effects and interfacial adhesion in carbon fiber reinforced CNT-phenolic composites. The change in chemical functional groups, as result of the plasma-treatment, was analyzed using Fourier transform infrared (FT-IR) spectroscopy. A significant enhancement in the wettability of plasma-treated CNT was also confirmed by static contact angle measurements. The advancing contact angle indicated a change in the surface from hydrophobic to hydrophilic. The interfacial adhesion between the carbon fibers and the plasma-treated CNT-phenolic matrix also improved, as evidenced by an increase in the apparent modulus. Due to the brittle nature of the phenolic matrix, dual matrix composites (DMC) were used in a modified fragmentation test. The different microfailure modes (phenolic matrix cracking and carbon fiber breaking) were investigated by acoustic emission and electrical resistance measurements. (C) 2012 Elsevier Ltd. All rights reserved.
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