engleski

The influence of polyester surface modification by cutinase to its adsorption and UV protection

Poly(ethylene-terephthalate) (PET) fabric has small absorption due to crystallinity of fiber. The conventional surface modifications, as alkali hydrolysis and aminolysis, are not eco- friendly, so the alternative methods have been researched. Since the application of enzymes is one of them, in this paper the cutinase surface modification of PET fabric was researched. The surface of light PET satin woven fabric was modified by cutinase (variation in concentration – 0.5, 1.5 and 15 g/l and temperature – 80 and 100°C) and compared to alkali hydrolysis. The adsorption of Fluorescent Brightener 135 (Ciba) was determined through fabric whiteness (WCIE) according to ISO 105- J02:1997 on remission spectrophotometer Spectraflash 300, Datacolor. Fabric’s air permeability was determined using M021S Air Permeability Tester, SDL ATLAS according to ISO 9237:1995. UV protection was determined on transmission spectrophotometer Cary 50/Solascreen, Varian according to AS/NZS 4399:1996. The cutinase treatment led to the PET fabric functionalization giving the same or even better results than alkali hydrolysis considering fabric whiteness and UV protection. The cutinase concentration of 0.5% owf proved to be enough if applied at the temperature higher than 100°C. If the temperature lower than of 80°C was applied, than the concentration of 1.5 g/l owf is optimal one.

PET, cutinase, hydrolysis, UV protection, fabric whiteness

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