The effect of surface treatment on the interfacial properties in carbon fibre/epoxy matrix composites

• Published in: Journal of materials science Vol. 30; no. 13; pp. 3543 - 3546
• Main Authors: BOGOEVA-GACEVA, G, BUREVSKI, D, DEKANSKI, A, JANEVSKI, A
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01-07-1995
• Subjects: Applied sciences; Composites; Exact sciences and technology; Forms of application and semi-finished materials; Polymer industry, paints, wood; Technology of polymers; Epoxy resin; Interface properties; Composite material; Surface treatment; Carbon fiber
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/BF00349908

Carbon fibres with different degrees of surface oxidation, as well as epoxy-sized fibres, were used to prepare epoxy composites in order to compare the effects of the fibres surface chemistry on the interfacial properties. X-ray photoelectron spectroscopy, water vapour adsorption measurements and contact angle examination were applied to characterize the carbon fibre surfaces. A correlation was found between the content of primary adsorption sites on the fibre surface and interlaminar shear strength (ILSS) of the composites. Higher values of ILSS obtained for the oxidized fibres containing composites are proposed to be due to the higher concentration of carboxylic groups created on the oxidized fibres surface and to the creation of chemical bonds at the fibre/epoxy matrix interface. Enthalpy of cure, reaction peak temperature and glass transition temperature of the composites were determined by differential scanning calorimetry.