BRITTO FILHO, C. O.; http://lattes.cnpq.br/0625690569373047; BRITTO FILHO, Claudio Orestes.
Résumé:
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.