Caracterização e avaliação de tecidos sintéticos com propriedades de proteção solar.

Abstract

Ultraviolet (UV) radiation is a small part of the radiation emitted by the sun. Clothing, glasses and hats are easily available accessories and effective for defending the body against the harmful effects of UV radiation. Synthetic fabrics, especially polyamide, have attracted interest in confection of these materials by the ability to protect against UV rays. Polyamide fibers have superior sun protection capability when compared to natural fibers and mineral particles may be incorporated (eg Ti02) in order to increase protection against the harmful effects of UV radiation. Therefore, this study aimed to evaluate and to characterize two types of commercial fabrics: non-function polyamide fabric radiation protection material, identified as Commercial Fabric I and of polyamide with UV radiation protection function, identified as Commercial Fabric II. Samples from both tissues were characterized by the techniques of Optical Microscopy (MO), Scanning Electron Microscopy (SEM), Dispersive Energy Spectroscopy (EDS) Spectroscopy in the region Fourier Transform Infrared (FTIR), X-ray Diffraction (XRD) and Differential Exploratory Calorimetry (DSC). At MO it was possible Note that Commercial Fabric II presented smaller pore size when compared to Commercial Fabric I. Through SEM it was seen that the Commercial Fabric II presented higher number of yarns per fiber (higher density), as well as Ti02 particles scattered between their fibers. At EDS Commercial II fabric showed high Ti02 content. In XRD Analysis it was possible to detect the presence of Ti02 in the anatase phase in the piano (101). Through the FTIR technique it was possible to observe that the peak of the two samples overlap, except in the 800 cm-1 region, characteristic of Ti02 (anatase). According to the results obtained, it can be concluded that the tissues analyzed (Commercial I and Commercial II), presented from the physicochemical and morphological, chemical and crystallographic composition typical of a polyamide.