Mechanical behavior of carbon nanofibre-reinforced epoxy composites

• Published in: Journal of applied polymer science Vol. 118; no. 4; pp. 2276 - 2283
• Main Authors: Rana, Sohel, Alagirusamy, R, Joshi, Mangala
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15.11.2010; Wiley
• Subjects: Applied sciences; Carbon; carbon nanofibre; Carbon-epoxy composites; Composites; dispersion; epoxy; Epoxy resins; Exact sciences and technology; Forms of application and semi-finished materials; nanocomposite; Nanocomposites; Nanomaterials; Nanostructure; Polymer industry, paints, wood; Reproduction; Scanning electron microscopy; Technology of polymers; work of rupture; Solvent effect; Mixing; Dispersion degree; Epoxy resin; Surfactant polymer; Nanofiber; Dispersion reinforced material; Mineral fiber; Composite material; work of rupture; Ethylene oxide polymer; Nanocomposite; carbon nanofibre; Chemical properties; Carbon fiber; Elastic modulus; Non ionic surfactant; epoxy; Ultrasonic treatment; Mechanical properties; Experimental study; Cyclic ether polymer; Morphology; dispersion; Fracture mode
• ISSN: 0021-8995; 1097-4628; 1097-4628
• DOI: 10.1002/app.30861

Epoxy resins are widely used in a variety of applications because of their high chemical and corrosion resistance and good mechanical properties. But few types of epoxy resins are brittle and possess low toughness which makes them unsuitable for several structural applications. In this work, carbon nanofibres have been dispersed uniformly into the epoxy resin at a very low concentration (0.07 vol. %). Improvement of 98% in Young modulus, 24% in breaking stress and 144% in work of rupture was achieved in the best sample. The emphasis is on achieving uniform dispersion of carbon nanofibers into epoxy resin using a combination of techniques such as ultrasonication, use of solvent and surfactants. The fracture surfaces of the specimens were studied under scanning electron microscope to see the fracture mechanism of nanocomposites under tensile load and correlate it to the enhancement in their properties.