Preparation of chitosan-grafted-polyvinyl acetate metal nanocomposite for producing multifunctional textile cotton fabrics.

Chitosan-g-polyvinyl acetate (Cs-g-PVAc) was synthesized successfully using redox copolymerization using potassium persulfate as initiator. TiO2 and TiO2 doped ZnO which previously prepared by sol-gel technique added for preparing emulsion from polymer – metal oxide nanocomposites. Cotton fabrics were treated with prepared emulsions using citric acid and sodium hypophosphite. XRD measurements prove that the prepared TiO2 nanoparticles corresponded to anatase phase with average crystallite size d = 15.98 nm where the crystallinity and crystallite size decreased for Zn doped TiO2 where d = 11.7 nm. FTIR indicates that the exhibition of grafting process and formation polymer metal oxide nanocomposite. Samples treated with Copolymer showed the highest antibacterial properties. However, the copolymer doped with TiO2 and TiO2/ZnO showed lowest contact angle and affects positively on its photocatalytic performance. SEM and TEM micrographs confirmed that the prepared metal oxides are in nano scales, where TiO2 is smaller than TiO2/ZnO which effects on the band gap of TiO2/ZnO to be larger than TiO2 and consequently decreased on the photocatalytic properties TiO2/ZnO of samples compared to TiO2 sample under the halogen lamp.