Abstarct
In this paper, the study on synthesis, characterization and application of nano-chitosan on cotton fabric has been reported. The nano-chitosan treated fabrics are then tested for appearance, tensile, absorbency, stiffness, dyeing behaviour, wrinkle recovery and antibacterial properties. Low molecular weight chitosans are prepared by nitrous acid hydrolysis method; the molecular weights are determined viscometrically. Nano-chitosans are synthesized by ionic gelation of pentasodium tripolyphosphate and chitosan, and then characterized by particle size determination. The fabric samples are pretreated with normal and nano-chitosan solutions by pad-dry-cure technique. The surface morphology of treated cotton fabric has been studied by SEM analysis. The treated fabrics have also been dyed and their whiteness, yellowness and brightness indices are evaluated. It is found that the particle size and polydispersity of chitosan in solution are affected by the variation in molecular weight. The dye uptake and wash fastness of nano-chitosan treated fabrics are found to be improved. An enhanced antibacterial property is observed with the reduction of nano-chitosan particles and when coupled with nano silver colloid
Contents
1. Introduction
2 Materials and Methods2.1 Materials
2.2 Synthesis and Characterization of Nano-chitosan
2.3 Treatment of Fabric with Nano-chitosan
2.4 Test Methods
3 Results and Discussion
3.1 Synthesis and Characterization of Nano-chitosan
3.2 Effect of Nano-chitosan Application on Surface Morphology
3.3 Effect of Nano-chitosan on Fabric Appearance
3.4 Effect of Nano-chitosan on Tensile Properties
3.5 Effect of Nano-chitosan on Absorbency
3.6 Dyeing Behaviour of Nano-chitosan Treated Cotton Fabric
3.7 Effect of Nano-chitosan on Crease Recovery
3.8 Effect of Nano-chitosan on Antibacterial Effect
4 Conclusions