Producing colored cotton fabrics with functional properties by combining silver nanoparticles with nano titanium dioxide

Abstract

In this study, functional cotton fabrics were prepared by applying titania as a photocatalyst and using silver nanoparticles as both a novel class of colorant for coloration and an agent capable of modifying the TiO 2 nanoparticles. Silver colloids with different colors were primarily synthesized through reduction of silver nitrate and then coloration of cotton fabrics and synthesis of Ag/TiO 2 nanocomposite on fabric surface was performed by adding titanium dioxide nanoparticles (P25) in an ultrasonic bath. The treated cotton fabrics were characterized by field emission scanning electron microscope, energy-dispersive X-ray spectroscopy, X-ray diffraction and UV-Vis reflectance spectroscopy. The color effect, self-cleaning property, antibacterial efficiency, ultraviolet (UV) blocking activity and hydrophobicity of the samples were also studied. The results indicated that all properties of the treated cotton fabric with Ag/ TiO 2 nanocomposite were superior compared to the treated sample with TiO 2 alone. Moreover, the photocatalytic activity of titanium dioxide has no negative effect on fabric color and the color variation of treated fabric after UV irradiation was negligible.

Surface Functionalization of Cotton Fabrics by Photo-Grafting for pH Sensing Applications

“…In particular, negative and positive values of a represent the position in green and red color regions, similarly negative and positive values of b are associated to blue and yellow color regions, respectively. Generally, samples with CIE E value from 2 to 4 have perceivable color difference, those between 4 and 5 have significant color difference, and above 12 belong to a different color space (Wyszecki and Fielder, 1971;Jafari-Kiyan et al, 2017). In this work, in addition to E, the value of b was also monitored due to the characteristic color changes of the GMA-NY system, mainly taking place in the yellow-blue color region.…”

Recent advances in the ultraviolet protection finishing of textiles

“…Simultaneous UV blocking properties and antimicrobial and self-cleaning activities were generated for protective clothing, sportswear and medical textiles. To this end, Ag was used in combination with TiO 2 and applied to cellulose fibres by diff erent application processes [50,52,[59][60][61]. Commercial Ag/TiO 2 nanocomposites were applied to cotton fabric during the exhaustion dyeing process to simultaneously load Ag/ TiO 2 and reactive dye on cotton [59].…”

“…Th e presence of reactive dyes enhanced the adsorption of Ag/ TiO 2 nanocomposite, resulting in excellent antimicrobial and UV protective properties that were retained aft er multiple domestic washings. Furthermore, the simultaneous colouration and function fi nishing of cotton fabric were performed using Ag colloids of diff erent colours in combination with TiO 2 NPs in an ultrasonic bath [61]. Th e UV blocking activity, antimicrobial effi ciency and selfcleaning property of the cotton fabric treated with the Ag/TiO 2 composite were superior compared with the sample treated with TiO 2 NPs alone.…”

“…ZnO/Ag nanocomposites were also used to generate simultaneous UV blocking, self-cleaning and antimicrobial properties of textiles [57,63,64]. Similar to the case of the Ag/TiO 2 nanocomposite [61], simultaneous colouration and functional fi nishing of the cotton fabric was carried out with the use of Ag/ZnO nanocomposite colloids under ultrasound irradiation, and vivid coloured multifunctional cotton fabric samples were prepared [63]. Th e photocatalytic activity of ZnO in the presence of Ag did not cause colour fading of the treated samples irrespective of the colour of the Ag NPs, which was very similar to the results obtained for the Ag/TiO 2 nanocomposite.…”

Homogeneous Coatings of Titanium Dioxide Nanoparticles on Corona-Treated Cotton Fabric for Enhanced Self-Cleaning and Antibacterial Properties

“…In recent decades, surface functionalization has been proven particularly effective in realizing unique textiles with desired properties such as self-cleaning, antibacterial, antifungal, fl ame retardancy, ultraviolet blocking and superhydrophobic [1][2][3][4][5][6]. In view of the close relationship with our daily life, the self-cleaning and antibacterial textiles are especially attractive.…”