Journal
APPLIED SURFACE SCIENCE
Volume 362, Issue -, Pages 341-347Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.11.232
Keywords
Carbon fiber; Aryl diazonium reaction; Benzoic acid group; Interfacial property; Urea
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Funding
- National Natural Science Foundation of China [21174034]
- Program for Young Teachers Scientific Research in Qiqihar University [2012k-M01]
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Using molten urea as the solvent, carbon fibers were functionalized with carboxylic acid groups via aryl diazonium reaction in 15 min to improve their interfacial bonding with epoxy resin. The surface functionalization was quantified by X-ray photoelectron spectroscopy, which showed that the relative surface coverage of carboxylic acid groups increased from an initial percentage of 3.17-10.41%. Mechanical property test results indicated that the aryl diazonium reaction in this paper could improve the interfacial shear strength by 66%. Meanwhile, the technique did not adopt any pre-oxidation step to produce functional groups prior to grafting and was shown to maintain the tensile strength of the fibers. This methodology provided a rapid, facile and economically viable route to produce covalently functionalized carbon fibers in large quantities with an eco-friendly method. (C) 2015 Elsevier B.V. All rights reserved.
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