Title: CHARACTERIZATION OF CARBON NANOFIBRE REINFORCED EPOXY COMPOSITE USING NANOINDENTATION AND AFM/UFM TECHNIQUES
Page Range: p.549-562
Author(s): Lee H; Mall S; Nalladega V; Sathish S; Roy A; Lafdi K
File size: 371K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 14
Issue No: No. 6
Abstract
The characterisation of carbon nanofibre-reinforced epoxy composites by the use of Nanoindentation, atomic force microscopy and ultrasonic force microscopy is described. These tests were supplemented with ultrasonic wave propagation and three-point bend test methods. The carbon nanofibres were functionalised with oxygen to improve dispersion and adhesion in the epoxy matrix. Improvements in modulus and hardness were found with the carbon nanofibre-reinforced epoxy as compared to the neat epoxy resin. These were dependent o the functionalisation treatment time. However, the increase was of a different magnitude when measured by the three methods of Nanoindentation, wave propagation and three-point bend tests. The indentation test technique is claimed to be capable of providing mechanical property data from a limited size and/or quantity of nanocomposites. The atomic force microscopy and ultrasonic force microscopy were able to characterise the behaviour of carbon nanofibres in nanocomposites, with the latter providing clearer information than the former. It is concluded that atomic force microscopy and ultrasonic force microscopy have the potential to provide a technique for the analysis of nanocomposites at nanoscale and for the mapping of the local surface stiffness at nanoscale. 27 refs.
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