Using Supercritical CO₂ as an Assistant Method to Optimize the Permeability and Fixation of Nano-TiO₂ in PP Non-Woven

Abstract:

In order to solve the difficulty of how nanoTiO₂ could penetrate and fixate in polypropylene fiber, the study was carried out by using supercritical CO₂ as an assistant method. According to the experiments, the stable nanoTiO₂ dispersion could be obtained by the following process. Mixed nanoTiO₂, penetrant JFC, polyethylene glycol and ethanol together under the mass ratio of 10:2:1:600, adjusted the pH value to 11, and ultrasonic dispersed for 30mins. Then the PP non-woven fabric was immersed in this solution for 10mins, followed by the treatment with the assistance of supercritical CO₂. The optimum process was achieved after three single factor experiments. The reaction time was 40mins, pressure was 30MPa and temperature was 100°C. After treatment, the content of nanoTiO₂ in 100g PP non-woven fabric could reach 4.43g, the percentage of the washed residue was 3.42g and the loss rate was 26.3%. nanoTiO₂ could penetrate and fixate very well in PP fiber.

• Periodical: Advanced Materials Research (Volume 1081)
• Pages: 151-155
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1081.151
• Online since: December 2014
• Authors: Cheng Wei Luo, Ying Chao Ji, Ying Wang, Zhi Hua Yu
• Keywords: Nano-TiO₂, PP Non-Woven, Supercritical CO₂

References

[1] Fujishima A, Honda K. Electrochemical photolysis of water at a semiconductor electrode. Nature, 1972, 238(5358): 37-38.

DOI: 10.1038/238037a0

[2] Yang Xu. The surface deposition of nano-TiO2 textile material preparation and performance research. Jiangnan University, 2009, 12.

[3] Wilmington D E. DuPont unveils TiO2-based light stabilizer, extends antistat additives RangeAdditives for Polymers, 2008, (1): 5-6.

DOI: 10.1016/s0306-3747(07)70241-5

[4] Mingyong Wang, Zhiping Mao, Rui Li. In situ nano anatase type TiO2 on cotton growth and anti ultraviolet properties . Journal of textile, 2007, 28(2): 71-75.

[5] Yuranova T, Laub D, Kiwi J. Synthesis, activity and characterization of textiles showing self-cleaning activity under daylight irradiation. Catalysis Today, 2007, 122(1-2): 109-117.

DOI: 10.1016/j.cattod.2007.01.040

[6] Bozzi A, Yuranova T, Guasaquillo I, et a1. Self-cleaning of modified cotton textiles by TiO2 at low temperature under daylight irradiation. Journal of Photochemistry and Photobiology A Chemistry, 2005, 174(2): 156-I 64.

DOI: 10.1016/j.jphotochem.2005.03.019

[7] Takeda S, Suzuki S, Odaka H, et a1. Photocatalytic TiO2 thin film deposited onto glass by DC magnetron sputtering. Thin Solid Films. 2001, 392(2): 338-344.

DOI: 10.1016/s0040-6090(01)01054-9

[8] Hequan Wang, Hui Shen, Dechun Ba, et al. The oxygen flow rate of TiO2 films prepared by DC reactive magnetron sputtering on the optical properties of the impact. Journal of Sun Yat-sen University , 2005, 44(6): 36-39.