Investigation into the Effect of UV/Ozone Irradiation on Dyeing Behaviour ‎of Poly(Lactic Acid) and Poly(Ethylene Terephthalate) Substrates

T ‎ he effect of UV/Ozone irradiation ‎together with the pretreatments ‎using distilled water, hydrogen ‎peroxide, and hydrogen ‎peroxide/sodium silicate solutions ‎on the dyeing depth of the ‎poly(lactic acid), PLA, and ‎poly(ethylene terephthalate), PET, ‎fabrics by the application of ‎disperse dyes were investigated ‎and the results were compared ‎with that of untreated fabrics. The ‎results showed that the reflectance ‎and the L* of the treated fabrics ‎decreased and these reductions ‎maximized by the pretreatment of ‎the fabrics with the hydrogen ‎peroxide/sodium silicate solution. ‎The SEM images of the fabrics ‎showed a change in the surface ‎morphology of the treated fabrics ‎which is attributed to the ‎intensified etching effect of the ‎UV/Ozone irradiation. Prog. Color ‎Colorants Coat. ‎‏5‏‎(2012), 15-22. © ‎Institute for Color Science and ‎Technology.‎