engleski

Electrokinetic Phenomena of Cationized Cotton with EPTAC

The systematic study of interface phenomena, that include electrokinetic phenomena, lead to knowledge of the mechanisms in textile processes setting the base that can be used to predict fabric behaviour in the wet finishing. Textiles are characterized by its inner and outer structure and functional groups. Specific adsorption of ions or dissociation of the surface groups in aqueous solution results with their surface charge. Cotton fibres, like most textile fibres, have negative electric charge in neutral and alkali aqueous solutions. Therefore, the adsorption of anionic textile auxiliaries, dyestuffs, optical brighteners and finishing agents is quite difficult. These repulsive forces may be overcome by addition of large electrolyte amounts what is economically and ecologically unfavourable ; or by fibre modifications. Cationization of cotton change surface charge and electrokinetic potential, significantly increasing its adsorption properties. The present paper investigates the electrokinetic phenomena (electrokinetic potential and specific amount of surface charge) of cotton knitted fabric cationized with 2, 3-epoxypropyl trimethyl ammonium chloride (EPTAC) before, during and after mercerization process. Additionally, the influence of cationization to fabric sewability was investigated. By comparing mercerized and cationized cotton, it was found that cationized cotton retains all the beneficial properties of mercerized cotton with a change of surface charge that ensures further quality improvement.

cationized cotton; zeta potential; surface charge; fabric sewability

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