The aim of the presented study was to characterize various commercially available colloidal dispersions containing various TiO2 core-shell nanoparticles in order to evaluate their potential for multi-functionally treatment of textile materials. Thus, numerous analytical skills were used such as scanning electron microscopy (SEM), dynamic light scattering (DLS), zeta potential measurement and UV/Vis spectrophotometry to determine colloidal dispersions’ morphology and structure, particle size distribution and pore size, chemical composition of the particle surface and its charge, etc. In addition, nano-sized TiO2 dispersions were applied on cotton fabric according to exhaustion procedure, and ultraviolet protection factor (UPF) was determined in order to examine the fabric functionalization as well as the influence of different shell particles and its concentrations on UV-blocking properties.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 16338710The 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 research was to employ diverse colloidal dispersions of nano-sized TiO2 hybrids in different concentration during the exhaustion procedure in order to modify cotton surface. All trials were performed on the laboratory apparatus Labomat (Mathis) at a temperature of 60°C for 110 min using liquor ratio of 1:20. Morphological characterization of the coated fibres was performed using scanning electron microscopy (SEM), and the change of textile whiteness was determined according to CIE formula. In addition, durability/bonding ability of TiO2-hybrids applications was examined after first, fifth and tenth laundering cycles as a function of UV transmittance measurements according to the Australian/New Zealand Standard (AS/NZS 4399:1996). The gained results indicated equal distribution of TiO2 core-shell nanoparticles over the surface of cotton fabric regarding the concentration of colloidal paste and the type of the shell particles. Furthermore, surface modification by nanoparticles brings about an outstanding UV protection functionality even after several washing cycles.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 16342806