Cotton fabric coated with nano TiO ₂ -acrylate copolymer for photocatalytic self-cleaning by in-situ suspension polymerization

Two kinds of nano TiO ₂ -polyacrylate hybrid dispersions, TBM-w and TBM-e were synthesized by in-situ suspension polymerization and solution polymerization respectively, in order to fix the nano TiO ₂ on fabrics. The photocatalytic self-cleaning fabrics have received much attention in recent years for its water-saving and environment-protection advantages. However, the fixation of the photocatalyst on fabrics is still a key problem that inhibits industrialization of these eco-friendly fabrics. The cotton fabric was treated by the two hybrid dispersions. The photocatalytic self-cleaning property was characterized. Infrared spectroscopy, burning loss test and thermogravimetry showed that some copolymer chains entangled with the nano TiO ₂ . Transmission electron microscope illustrated that there was a polymeric layer on the surface of nano TiO ₂ . The average diameter of TBM-w was smaller than that of TBM-e based on size analysis. The photocatalytic decoloration of the grape syrup indicated that the fabric with TiO ₂ -polymer hybrid had excellent self-cleaning property.