title: Chitosan as a potential stabilizing agent for titania nanoparticle dispersions for preparation of multifunctional cotton fabric.
abstract: Titania (TiO2) nanoparticle dispersions in water were prepared using chitosan (CS) as the stabilizing agent. The dispersion stability was evaluated with respect to storage time, hydrodynamic particle size, and zeta potential. The effect of the molecular weight of CS and presence of non-ionic polymers (poly(vinyl alcohol) and poly(ethylene glycol)) as co-dispersants was investigated. Despite the increase in size of dispersed particles, the long-term storage stability of the dispersions improved with increasing concentration and molecular weight of CS. The TiO2/CS dispersions were applied on cotton fabric and characterized. The presence of CS did not seriously affect the photocatalytic self-cleaning activity (SCA) of TiO2; with CS, a SCA of 89% was achieved compared with a value of 96% without CS. In addition, the TiO2/CS-treated cotton fabrics provided UV protection and significant antimicrobial activity.
authors: Department of Fabric and Apparel Science, Lady Irwin College, University of Delhi, New Delhi 110001, India.
authors: Nidhi
authors: N
authors: Goyal
authors: Department of Fabric and Apparel Science, Lady Irwin College, University of Delhi, New Delhi 110001, India.
authors: Deepali
authors: D
authors: Rastogi
authors: SMITA Research Lab, Department of Textile Technology, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India. Electronic address: manjeet.jassal@smita-iitd.com.
authors: Manjeet
authors: M
authors: Jassal
authors: SMITA Research Lab, Department of Textile Technology, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India. Electronic address: ashwini@smita-iitd.com.
authors: Ashwini K
authors: AK
authors: Agrawal
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D032561:Cotton Fiber; D008970:Molecular Weight; D053758:Nanoparticles / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013211:Staphylococcus aureus / Q000254:growth & development; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D000890:Anti-Infective Agents; C009495:titanium dioxide; D011092:Polyethylene Glycols; D048271:Chitosan; D014025:Titanium
keywords: Chitosan; Cotton; Dispersion stability; Self-cleaning activity; Titania