engleski

Surface Modification of Polyester Fabric With Lipase – The Influence to Interface Phenomena

The most important phase in textile finishing processes is adsorption of chemical substances and compounds on textile materials surface and wettability as well. Interface phenomena happen between liquid and solid phase, like water solution and textile material, resulting in change of textile material surface free energy. Electrokinetic phenomena, as zeta potential and specific amount of surface charge, characterize electric charge of textile material, while contact angle characterize its wettability. The conventional processes of polyester modification, hydrolysis and aminolysis, improve properties of finished material but pollute the waste water as well. For that reason, nowadays the alternative procedures are investigated, such are treatments using ultrasound or different enzymes - lipase, catalase, etc. Therefore, the interface phenomena of polyester fabric after pre-treatment with enzymes - commercial lipase Company BioCatalysts origin from Candida cylindracea, and laboratory obtained lipase from Penicilium roqueforti was researched. This paper deals with the electrokinetic phenomena – zeta potential, isoelectric point (IEP), a point of zero charge (PZC), and specific amount of surface charge ; as well as contact angle, water and dyestuff adsorption of such modified polyester fabrics.

polyester fabric; lipase; interface phenomena; electrokinetic phenomena; adsorption

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