Photo bleaching of wool using nano TiO2 under daylight irradiation

Montazer, Majid; Morshedi, Somaye

doi:10.1016/j.jiec.2013.04.023

Cited by 38 publications

(13 citation statements)

References 35 publications

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“…Most of the reported experimental works have been performed in aqueous aerated acidic or alkaline solutions. The decrease of absorbance with irradiation, bleaching, suggests that it can be use as a chemical dosimeter [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Tartrazine Solution as Dosimeter for Gamma Radiation Measurement

Gobara¹,

Baraka²

2014

ILCPA

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In this study, Tartrazine aqueous solution was investigated as a simple low-dose dosimeter in the range of 20-500 Gy for the high ionizing radiation, gamma ray. Gradual bleaching of Tartarzine solution was observed with dose by measuring the absorbance of Tartarzine-solutions at specified wavelength, λ max = 428 nm. Tartrazine concentration (10 -4 , 5 ×10 -4 and 10 -3 M) and solution-initial pH value (5, 7 and 9) were considered as factors affecting degree of bleaching. It was found that Tartarzine-solution color was diminished gradually with selected dose range due to breakdown of the azo bond. The rate of bleaching increases with the increase of solution-initial pH. Increase of Tartarzine-concentration causes widening of range to which solution is susceptible. The post-irradiated effect (24 hours) was found to cause more bleaching. The sensitivity of Tartrazine solution is not regular with the Tartarzine-concentration and regular with pH.

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Section: Introductionmentioning

confidence: 99%

Tartrazine Solution as Dosimeter for Gamma Radiation Measurement

Gobara¹,

Baraka²

2014

ILCPA

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“…The W2 specimens' behavior is much better than the W1 specimens. Similarly, the UVA rays and visible light have little infl uence on the whiteness indices of wool fi bers, except the whiteness index of the W2 specimens, which increase slightly at the late period of UVA irradiation primarily because of the photo-bleaching of TiO 2 [38]. Therefore, the results confi rm that the TiO 2 fi lm makes a little contribution to the photo-yellowing of wool fi bers against UVB rays.…”

Section: Yellowness and Whiteness Indicesmentioning

confidence: 65%

“…The alkali solubility of the nano-TiO 2 -coated wool fabrics can be reduced while the fabric becomes more hydrophilic [37]. TiO 2 nano-photo-bleaching has been applied to the scoured and protease pretreated wool fabrics; thus, the improved whiteness index and hydrophilicity can be obtained [38].…”

Section: Introductionmentioning

confidence: 99%

Photostability of TiO₂-Coated Wool Fibers Exposed to Ultraviolet B, Ultraviolet A, and Visible Light Irradiation

Tang

Zhang

Han

et al. 2021

Autex Research Journal

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This study is to investigate the role of the coating of TiO2 nanoparticles deposited on wool fibers against high-intensity ultraviolet B (UVB), ultraviolet A (UVA), and visible light irradiation. The properties of tensile and yellowness and whiteness indices of irradiated TiO2-coated wool fibers are measured. The changes of TiO2-coated wool fibers in optical property, thermal stability, surface morphology, composition, molecular structure, crystallinity, and orientation degree are characterized using diffuse reflectance spectroscopy, thermogravimetric analysis, scanning electronic microscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction techniques. Experimental results show that the tensile properties of anatase TiO2-coated wool fibers can be degraded under the high-intensity UVB, UVA, and visible light irradiation for a certain time, resulting in the loss of the postyield region of stress–strain curve for wool fibers. The coating of TiO2 nanoparticles makes a certain contribution to the tensile property, yellowness and whiteness indices, thermal stability, and surface morphology of wool fibers against high-intensity UVB, UVA, and visible light irradiation. The high-intensity UVB, UVA, and visible light can result in the photo-oxidation deterioration of the secondary structure of TiO2-coated wool fibers to a more or less degree. Meanwhile, the crystallinity and orientation degree of TiO2 coated wool fibers decrease too.

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“…Herein, a limited number of studies have focused on both the evaluation of newly gained functional properties after several washings and the eventual side-effect after prolonged light exposure, like yellowness, bleaching, polymer degradation, reduction of newly-obtained functionalities, etc. Montazer et al [11] studied the photo bleaching of wool using a nanoTiO 2 catalyst, in order to decompose the naturally-occurring pigments. The obtained results confirmed excellent hydrophilicity and reasonable whiteness even after five washings, regarding the amount of applied TiO 2 , although the textile degradation was not investigated.…”

Section: Introductionmentioning

confidence: 99%

Washing Durability and Photo-Stability of NanoTiO2-SiO2 Coatings Exhausted onto Cotton and Cotton/Polyester Fabrics

Ojstršek

Fakin

2019

Coatings

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The purpose of this study was to assess and compare the durability of TiO2-SiO2 coatings applied in three concentrations onto two lightweight cellulose-based fabrics diverse in the composition against two external factors, repeated washings and prolonged intensive UV irradiation, by observing the changes in surface morphology, investigation of optical properties, and identification of specific molecular vibrations. The scanning electron microscopy (SEM) micrographs, diffuse reflectance spectroscopy (DRS) profiles and fourier transform-infrared (FT-IR) spectra implied equal distribution of TiO2-SiO2 nanoparticles over the surfaces of both fabrics after exhaustion procedures, regarding the concentration of colloidal paste and the type of material used, followed by a slight reduction of nanoparticles after twenty washing cycles. Moreover, the newly gained, good to very good UV protective functionality proved the suitability of the employed procedure and the sufficient durability of the selected coatings. Additionally, UV irradiation mainly caused damages to the cotton. Cotton/polyester became yellower under UV, although the application of TiO2-SiO2 protected the material against yellowness.

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Photo bleaching of wool using nano TiO2 under daylight irradiation

Cited by 38 publications

References 35 publications

Tartrazine Solution as Dosimeter for Gamma Radiation Measurement

Tartrazine Solution as Dosimeter for Gamma Radiation Measurement

Photostability of TiO₂-Coated Wool Fibers Exposed to Ultraviolet B, Ultraviolet A, and Visible Light Irradiation

Washing Durability and Photo-Stability of NanoTiO2-SiO2 Coatings Exhausted onto Cotton and Cotton/Polyester Fabrics

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Photo bleaching of wool using nano TiO2 under daylight irradiation

Cited by 38 publications

References 35 publications

Tartrazine Solution as Dosimeter for Gamma Radiation Measurement

Tartrazine Solution as Dosimeter for Gamma Radiation Measurement

Photostability of TiO2-Coated Wool Fibers Exposed to Ultraviolet B, Ultraviolet A, and Visible Light Irradiation

Washing Durability and Photo-Stability of NanoTiO2-SiO2 Coatings Exhausted onto Cotton and Cotton/Polyester Fabrics

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Product

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Photostability of TiO₂-Coated Wool Fibers Exposed to Ultraviolet B, Ultraviolet A, and Visible Light Irradiation