Superior self‐cleaning features on wool fabric using TiO₂/Ag nanocomposite optimized by response surface methodology

Abstract

Wool fabrics with superior self‐cleaning properties produced using titanium dioxide/silver nanocomposite. The TiO2/Ag nanocomposite first synthesized under ultraviolet (UV) irradiation and sonication and then applied on wool fabrics along with citric acid (CA) as a crosslinking agent to stabilize the nanoparticles on the wool surface. The optimum conditions of different properties of the treated wool fabrics obtained using response surface methodology as a statistical method. The role of three independent variables including titanium dioxide/silver nanocomposite (TiO2/Ag), CA, and sodium hypophosphite evaluated to optimize the processing conditions. Fabrics color variation determined after irradiation with three diverse UV sources including sunlight, UV‐A, and UV‐C rays. Increasing the concentration of TiO2/Ag nanocomposite increased the color removal and decreased the water absorption time. Further, increasing the concentration of CA led to increase adsorption of TiO2/Ag nanocomposite on the fabric surface improved self‐cleaning features of treated wool fabrics. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

Functional Modification with TiO2 Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process

“…8 During this process, additional carboxylic groups are introduced on wool fibre surface by acylation, which result in enhanced bonding between TiO 2 particles and the modified wool fibres 8 due to the compatibility between the anatase TiO 2 sols and wool fibres; 9 Wool fabrics are reported to be treated with citric acid as the cross-linking agent and bonded either with different concentrations of nano TiO 2 to improve its photostability 10 or with TiO 2 /Ag nanocomposites to improve self-cleaning properties. 11 The surfaces of nanoparticles are frequently modified by using chemical or physical modification. For instance, in order to obtain coated nano-TiO 2 particles having greater surface activity and higher light absorption capacity, PET/wool fabric is first treated with proteases and lipases enzymes, and then dipped into an ultrasound bath containing nano TiO 2 and butane tetracarboxylic acid, and finally cured.…”

Recent Progress in Self-Cleaning Materials with Different Suitable Applications

“…This active glass is one of the best products in self-cleaning applications and has recently been used in many different buildings in commercial and private all around the world. have investigated this technique as a suitable choice in case of semiconductor photo catalysis (Pasqui and Barbucci, 2014;Karimi et al, 2014b;Montazer et al, 2012). This potential has been measured in order to confirm the ability of stearic acid degradable.…”

Optimizing the photocatalytic properties and the synergistic effects of graphene and nano titanium dioxide immobilized on cotton fabric

“…On the other hand, the photogenerated electron-hole pairs have a flash recombination time on the order of 10 −9 s, while the time scale of chemical interactions of TiO 2 with the adsorbed dye or chemicals is in the slower range of 10 −8 -10 −3 s. This discrepancy between two time scales results in an unintended recombination of electron−hole pairs, leading to decreased efficiency in the photocatalytic activity of TiO 2 [17]. Besides, nano TiO 2 shows the photocatalytic activities just under UV rays Page 4 of 38 A c c e p t e d M a n u s c r i p t 4 which is one of the major limits in developing its usage [18]. Admittedly, modifying TiO 2 with graphene can improve the efficiency of the photocatalytic process.…”