Estudo da influência da luz ultravioleta no alvejamento de malha de algodão

Abstract

The textile processing is divided into three stages, one of which is the primary beneficiary, which has a series of chemical and / or mechanical operations that have the common objective of preparing the textile article for dyeing and finishing processes. One of these operations is performed, or what is the function of degrading the existing pigments in the fiber by chemical, using the white textile substrate, and the conventional process is performed by using a hydrogen peroxide at high temperatures. However, a search for new methodologies for these beneficiation processes is constant, as they can contribute to improvements both for the technological advancement of the process and also for the quality of the final article. Thus, an alternative that may contribute to conventional whitening is the performance of this procedure with the use of ultraviolet light (UV), which may have the function of activating the oxidizing agent present in the solution. Based on this, the objective of this work was to investigate the influence of some process parameters (H2O2 concentration, time and distance of UV light with a sample) without change with UV radiation through a factorial design 23. From the results It was found that all the factors analyzed were used, and the distance between the UV light and the sample was the factor that had the greatest contribution in the degree of whiteness, being the smallest as the distance between the UV light and the sample. , the largest was the degree of white used. It was also performed or conventionally bleached without interference of any light on the bleached solution and, this experiment, resulted in a lower degree of white when compared with bleaching performed with the aid of UV light emission. In view of this, it is not possible to use ultraviolet radiation in the textile socket effectively contributed to a good result in the whiteness of the targeted mesh.