The purpose of the presented research was to investigate the impact of two chemically different dyestuffs (acid and disperse) in two colours (red and blue) and two concentrations (1 and 4%), together with application of various UV absorbers (TiO2, lignin and extract from pine wood) on blocking properties against UV radiation of two structurally different fabrics made from PA and PES fibres for summer cloths. Study was focused also on colour changes of dyed fabrics after application of different UV absorbers. The obtained results indicated important impact of dyestuffs in concentration of 1% on materials' protective properties. Selected absorbers have also great influence on UPF values and, therefore, the combination of both, absorbers and dyestuffs offer maximum protection to solar UV radiation of studied fabrics.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 14553878Invention is related to treatment of various textiles by solution of red pine extract with the intention to attain excellent UV protective properties. It is impregnation procedure in ethanol dissolved extract. During the impregnation using 6 g/l, at 70-80% squeezing, 1 min drying at 100°C, and 50 s fixation at 160°C, superior UV protection was obtained on diverse materials. Advantage of this procedure in comparison to others is in the fact that the red pine extract is a secondary product during cellulose manufacturing. Also, the procedure is easy to accomplished on conventional machinery. Fabrics, with the exception of cotton, attain an exellent protection with UPF 50+.
F.06 Development of a new product
COBISS.SI-ID: 15704854The goal of this research was to investigate the possibility of combining the application of TiO2- SiO2 nanoparticles and reactive dyeing in one-bath exhaustion procedure in order to enhance fabricsć blocking ability against harmful UV-rays. Cotton fabric was dyed using reactive dye Bezaktiv Red S-3B 150% in concentration of 0.5% owf and 3, 6 or 9% owf TiO2-SiO2 paste (0.1,0.2 or 0.3% pure TiO2) under three different operational temperatures (60, 80 or 98°C), 70 min. The morphological structures of colloidal dispersionas well as nano-upgraded cotton fabrics were characterized by scanning electron microscopy, and the UV protection ability by spectrophotometry. Treated samples were also colorimetrically evaluated by means of CIE colour system. The obtained results indicate that the incorporation of TiO2-SiO2 into the dyebath reactive dyes included brought about an outstanding UV protection functionality of the dyed fabrics with a negligible negative impact on colour depending on nanoparticles concentration and treatment temperature.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 16098326The purpose of the presented research was to determine UV protective properties of cotton fabric treated with several concentrations of TiO2-SiO2 core-shell nanoparticles. Application of nanoparticles’ colloidal dispersion was carried-out according to exhaustion procedure with varied operational parameters, i.e. treatment time, auxiliaries, chemicals, pH and temperature. Nano-modified cotton fabrics were characterized by ATR-FTIR spectroscopy and scanning electron microscopy. The UV-blocking ability of TiO2-SiO2 coated and washed samples was evaluated by measuring UV-A and UV-B transmittance, and by calculating an ultraviolet protection factor. The obtained results indicated hydrogen bonding of the synthesized TiO2–SiO2 core-shell nanoparticles onto the cotton fabrics and equal distribution of nanoparticles trough surface. Furthermore, surface modification by nanoparticles brings about an outstanding UV protection functionality of the cotton fabric depending on the concentration of TiO2-SiO2 nanoparticles as well as on the bath composition and treatment temperature.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 16339222The aim of the presented paper was to assess the effect of dyes and natural (bio) UV absorbers, particularly lignin and other derivatives extracted from pine wood on UV protection properties of various fabrics for summer cloths. Also, the oxidized hydroxymatairesinols such as oxo-matairesinol, ArMe.X-lignin and their derivatives, which have high absorption capacity in the UVB region, as well as pynosylvines with conjugated double bonds that are important for the UVA region, were examined closely.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 14467350