Anti‐ultraviolet and physical properties of woolen fabrics cured with citric acid and TiO₂/chitosan

Abstract

This experiment is to research the chemical compositions of the crosslink of the woolen, oxidized with H 2 O 2 of various concentrations and temperatures, cured with the citric acid and TiO 2 /chitosan liquid of different proportions, and then observed by means of Fourier Transfer Infrared Spectrometer (FT-IR), Scanning Electronic Microscope (SEM), Energy Dispersive Spectrometer (EDS), and Thermo-Gravity Analyzer (TGA). Its antishrinkage, antimicrobes, antiultraviolet, strength, elasticity, softness, and yellowness are also investigated to study the changes in its physical properties. From the result, we can see, under the SEM, the sign of disappearance of woolen scales owing to the destruction by H 2 O 2 oxidization; the more H 2 O 2 and its oxidization temperature, the more serious their destruction. The phenomenon of crosslink is not obvious after oxidization and curing treatment with TiO 2 /chitosan, but it somehow apparently happens to the woolen surface. Because TiO 2 /chitosan does not intertwine with the woolen well, which has few effects of heat, the woolen shrinks less with more H 2 O 2 and oxidization temperatures. Its antishrinkage is better. But the more wash, the more shrinkage. However, TiO 2 covered with chitosan catches less sunlight, and thus cannot suppress or even kill microbes. The woolen processed with nanometer TiO 2 enhances the effect of antiultraviolet, which is better as the density of TiO 2 increases. The strength and elasticity of the woolen are worse for more H 2 O 2 and the higher temperature destroy scales and make the woolen coarse, yellow,and less soft.

A review on the application of inorganic nano-structured materials in the modification of textiles: Focus on anti-microbial properties

“…Zhao et al have reported that adding an optimum weight ratio of hydroxyl propyl cellulose (HPC) to TiO 2 nano-particles can improve the photoinduced hydrophilicity and the photo-catalytic activity of the TiO 2 film [95]. Anti-UV and other physical properties of TiO 2 /chitosan nano-composite have been reported by Hsieh et al [105].…”

“…The production of Pt/TiO 2 [100], TiO 2 /chitosan nano-composites [105], TiO 2 /SiO 2 [106], CNTs-TiO 2 composites [107][108][109], TiO 2 -hydroxyapatite [110] and many others has also been reported.…”

Optimization of cotton crosslinking with polycarboxylic acids and nano TiO2using central composite design

“…This is because of their ability to absorb ultraviolet irradiation and act as photo catalyst. Furthermore, nano TiO 2 particles on the fabric surfaces will not affect their breathability or handle 1–9. Various methods can be used to apply finishing materials on fabrics, including spraying, transfer printing, foaming, and padding among which padding is the most commonly used 10–17…”

Photocatalytic effects of wool fibers modified with solely TiO2 nanoparticles and N-doped TiO2 nanoparticles by using hydrothermal method

“…Compared with the spectrum of the untreated wool fibers, the O-H band of the TiO2 coated wool fibers shifts from 3425 to 3443 cm -1 . This is ascribed to the surface absorbed water induced by the TiO2 coating [25], which might make the TiO2 coated fiber generate much stronger oxidative free radicals than those of untreated one [26]. …”