Aplikace iontových kapalin k úpravě textilu pro ochranu pokožky proti UV záření

Abstract

As a result of damage to the ozone layer in certain regions of the world, a greater amount of harmful UV radiation penetrates the Earth's surface, and the cotton material generally used for the production of clothing achieves low values of UV protection. As part of the work, a modification of the cotton fabric was proposed with the aim of increasing its UV protective properties. Ionic liquids (IL) were selected and prepared, which should have the ability to absorb radiation in the ultraviolet region, especially in the UVA and UVB areas, and after their impregnation on cotton fabric, better resistance of the material against UV radiation should occur. At the same time, the prepared IL must achieve low levels of toxicity to the human organism, due to their contact with the skin, and also must not dissolve the cotton fiber, so that it does not deteriorate. In the theoretical part, general information about IL, cotton, protection against UV radiation is summarized, there are also chapters dedicated to the assessment of textile protection against UV radiation and analytical methods that were used in the work. The experimental part is devoted to the synthesis, ion exchange and refining of IL, methods of characterization of IL, impregnation of cotton fabric with IL and evaluation of the effectiveness of UV protection. The prepared IL are characterized using analytical techniques such as elemental analysis, argentometric titration, Karl-Fisher titration, NMR, UV-Vis, FTIR-ATR, then they are also evaluated using acute toxicity tests using paddle testers for coliform bacteria, molds and yeasts and also on cellular metabolic activity using the MTT Assay colorimetric test. The impregnated cotton fabric is subjected to SEM, XPS techniques and subsequent evaluation using the UV protection factor (UPF). Interrelationships between the structure of the IL used and their toxicological, ecotoxicological properties and their ability to absorb UV radiation are discussed. The highest UPF = 70.6 was achieved for (C12(Chin)2)2TFSI-, excellent results regarding both the stability of impregnated cotton fabric after the washing cycles performed, and also in terms of toxicity were achieved.