Photo bleaching of wool using nano TiO2 under daylight irradiation

Abstract Wool bleaching is usually carried out on raw wool through treatment with oxidizing or reducing agents. Here, nano TiO 2 as a photocatalyst was applied on raw wool fabric to decompose the naturally occurred pigments under daylight irradiation. To enhance nano particles adsorption on the fabric, it was first treated with protease and then treated with nano TiO 2 along with citric acid. The whiteness and yellowness indexes and hydrophilicity features of the treated wool fabrics indicated a reasonable whiteness with a significant improved hydrophilicity. This new wool bleaching approach was named as “ nano photo bleaching ” as a most successful bleaching application.

[1]  Liu Peng,et al.  The Envelope Damage of Tetrahymena in the Presence of TiO2 Combined with UV Light , 2010, Photochemistry and photobiology.

[2]  J. Herrmann,et al.  Photocatalytic pollutant removal in water at room temperature: case study of the total degradation of the insecticide fenitrothion (phosphorothioic acid O,O-dimethyl-O-(3-methyl-4-nitro-phenyl) ester) , 1996 .

[3]  K. Millington.  Photoyellowing of wool. Part 1: Factors affecting photoyellowing and experimental techniques , 2006 .

[4]  J. Xin,et al.  Self-cleaning cotton , 2006 .

[5]  Jinwon Park,et al.  Visible-light photocatalytic activity of TiO2−x by heat treatment and plasma-heat treatment , 2012 .

[6]  W. S. Tung,et al.  Effect of wettability and silicone surface modification on the self-cleaning functionalization of wool , 2009 .

[7]  S. H. Kim,et al.  Behavior of hydrogen evolution of aqueous sodium borohydride solutions , 2008 .

[8]  M. Montazer,et al.  Reducing Photoyellowing of Wool Using Nano TiO2 , 2010, Photochemistry and photobiology.

[9]  Xungai Wang,et al.  A morphology-related study on photodegradation of protein fibres. , 2008, Journal of photochemistry and photobiology. B, Biology.

[10]  Xungai Wang,et al.  The photostability of wool doped with photocatalytic titanium dioxide nanoparticles , 2009 .

[11]  Liang Hong,et al.  Physicochemical and electrochemical characterization of anatase titanium dioxide nanoparticles , 2005 .

[12]  Young-Seak Lee,et al.  Preparation of poly(vinyl alcohol)/poly(acrylic acid)/TiO2/carbon nanotube composite nanofibers and their photobleaching properties , 2012 .

[13]  I. Russell,et al.  Advances in Wool Technology , 2009 .

[14]  Xianzhi Fu,et al.  Effects of electron transfer between TiO2 films and conducting substrates on the photocatalytic oxidation of organic pollutants. , 2006, The journal of physical chemistry. B.

[15]  W. S. Tung,et al.  Self-cleaning keratins , 2008 .

[16]  Majid Montazer,et al.  Functionality of nano titanium dioxide on textiles with future aspects: focus on wool , 2011 .

[17]  K. Millington.  Photoyellowing of wool. Part 2: Photoyellowing mechanisms and methods of prevention† , 2006 .

[18]  Majid Montazer,et al.  Enhanced Self‐cleaning, Antibacterial and UV Protection Properties of Nano TiO2 Treated Textile through Enzymatic Pretreatment , 2011, Photochemistry and photobiology.

[19]  T. Sarna,et al.  Bleaching of melanin pigments. Role of copper ions and hydrogen peroxide in autooxidation and photooxidation of synthetic dopa-melanin. , 1990, The Journal of biological chemistry.

[20]  A. Nazari,et al.  Self-cleaning properties of bleached and cationized cotton using nanoTiO2: A statistical approach , 2011 .

[21]  S. Karmakar,et al.  Chemical technology in the pre-treatment processes of textiles , 1999 .

[22]  M. Montazer,et al.  A novel durable flame-retardant cotton fabric using sodium hypophosphite, nano TiO2 and maleic acid , 2011 .

[23]  M. Montazer,et al.  A novel technique for producing durable multifunctional textiles using nanocomposite coating. , 2010, Colloids and surfaces. B, Biointerfaces.

[24]  Majid Montazer,et al.  A review on the application of inorganic nano-structured materials in the modification of textiles: focus on anti-microbial properties. , 2010, Colloids and surfaces. B, Biointerfaces.

[25]  M. Montazer,et al.  Sodium hypophosphite and nano TiO2 inorganic catalysts along with citric acid on textile producing multi-functional properties , 2012 .

[26]  J. Kiwi,et al.  Self-cleaning of wool-polyamide and polyester textiles by TiO2-rutile modification under daylight irradiation at ambient temperature , 2005 .

[27]  Ali Nazari,et al.  Nano TiO2 photo-catalyst and sodium hypophosphite for cross-linking cotton with poly carboxylic acids under UV and high temperature , 2009 .

[28]  Min-Kyeong Yeo,et al.  Methyl orange removal over Zn-incorporated TiO2 photo-catalyst , 2008 .

[29]  S. Azizian,et al.  Enhancement of methyl violet removal by modification of TiO2 nanoparticles with AgI , 2012 .

[30]  P. Erra,et al.  XPS analysis of down stream plasma treated wool: Influence of the nature of the gas on the surface modification of wool , 2005 .

[31]  M. Montazer,et al.  The role of nano colloid of TiO2 and butane tetra carboxylic acid on the alkali solubility and hydrophilicity of proteinous fibers , 2011 .

[32]  H. Höcker,et al.  Extremozymes for improving wool properties. , 2001, Journal of biotechnology.

[33]  W. S. Tung,et al.  Understanding photocatalytic behavior on biomaterials: Insights from TiO(2) concentration. , 2009, Journal of colloid and interface science.

[34]  Thuy-Duong Nguyen-Phan,et al.  Morphological effect of TiO2 catalysts on photocatalytic degradation of methylene blue , 2011 .

[35]  José Antonio Ayllón,et al.  TIO2-photocatalyzed degradation of phenol and ortho-substituted phenolic compounds , 2001 .