International Journal of Advances in Science Engineering and Technology, ISSN: 2321-9009, Vol-5, Iss-1, Spl. Issue-3 Mar.-2017 http://iraj.in LIKELY MECHANISM OF DYE ADHESION ON FABRICS 1D. MALOMO, 2S.A ABIMBADE, 3A.K OLUWASEUN, 4O.EGHAREBA 1,2,3Department of Industrial Chemistry, Federal University Oye Ekiti, Nigeria 4Rubber Research Institute of Nigeria, Benin City, Nigeria E-mail:
[email protected] Abstract - The mechanism of adhesion of dyes as colouring agents on different types of fabrics is hereby examined. The dyes under study include, basic dyes, acidic dyes, azo dyes, mordant dyes, and vat dyes while the fabrics are cellulosic materials, wool fabrics, nylon 6,6 fabrics, nylon 6 fabrics, silk fabrics and polyester materials. The principle of adhesion proposed leading to the fastness of the colourants is illustrated by the bonding of atoms and molecules arising from intermolecular interactions between functional groups of the dyes and the substrate materials. The functional groups involved are hydroxyl group (-OH), carboxylic group (-COOH), carbonyl group (=C=O), imino group (-NH-) ester group (- COOR), amide group (-CONH2) as well as conjugation in aromatic groups. The types of bonding proposed are ionic, covalent, dative covalent, dipole-dipole forces, and inter molecular hydrogen bonding. The study also shows that adhesion may be enhanced by physical entrapment of the colouring molecules on the substrate. Keywords - adhesion, entrapment, bonding, functional group, fabric and dye I. INTRODUCTION complex, as a member of factors must be considered. This paper set out to examine various types of dyes A dye is a colouring substance that has affinity for the and fabrics as well as present likely mechanistic substrate to which it is being applied (Popoola, 2015) processes by which some selected dyes are adhered It is usually applied in an aqueous solution and may on the surfaces of some chosen fabrics.