Supercritical CO2 Assisted TiO2 Preparation to Improve the UV Resistance Properties of Cotton Fiber

Abstract

Cotton fiber is favored by people because of its good moisture absorption, heat preservation, soft feel, comfortable wearing and other excellent performance. In recent years, due to the destruction of the ozone layer, the intensity of ultraviolet radiation at ground level has increased. Cotton fiber will degrade under long time ultraviolet irradiation, which limits the outdoor application of cotton fiber. In this study, titanium dioxide (TiO2) particles were prepared on the surface of cotton fibers with the help of supercritical carbon dioxide (SCCO2) to improve the UV resistance of cotton fibers. The effects of SCCO2 treatment on the morphology, surface composition, thermal stability, photostability and mechanical properties of TiO2 were studied by Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, thermogravimetric analysis, UV-VIS spectroscopy, and single fiber test. The results showed that TiO2 particles were generated on the fiber surface, which reduced the photo-degradation rate of cotton fiber. This is because TiO2 can absorb UV rays and reduce the absorption of UV rays by the cotton fiber itself. The synthesis process of SCCO2 is simple and environmentally friendly, which provides a promising technology for the synthesis of metal nitrogen dioxide on natural plant fibers.

Using deep eutectic solvent dissolved low-value cotton linter based efficient magnetic adsorbents for heavy metal removal

“…12 . 62 Initially, Fe 3 O 4 molecules were loaded onto the surface of CL, and the abundant O atoms in the molecular structure of Fe 3 O 4 formed hydrogen bonds with the hydroxyl groups in CL molecules, thus stabilizing Fe 3 O 4 on CL. Subsequently, the adsorption of Cu 2+ on Fe 3 O 4 was primarily driven by an ion exchange reaction, while the chelation reaction was mainly observed on the surface and interface of CL.…”

Morphological Dependence of Metal Oxide Photocatalysts for Dye Degradation

“…Among the many different photocatalysts, TiO 2 has received the most attention and has been utilized in the most applications. This is due to its potent oxidizing properties [65][66][67][68], its ability to degrade organic pollutants [69], its superhydrophilicity [70], its chemical stability, long durability, nontoxicity, low cost, and transparency to visible light [62,71], as well as its good anti-corrosion performance, high mechanical strength, low density, and a competitive price. TiO 2 exhibits photocatalytic properties by producing photogenerated charge carriers upon absorption of UV light which correspond to the energy band gap of TiO 2 .…”