Preparation of oxidized cotton fabric grafted with HBP-NH_2

The HBP-NH2 grafted oxidized cotton fabrics(HGCF)were prepared by the reaction of cotton fabrics oxidized with sodium periodate and water-soluble amino-terminated hyperbranched polymer(HBP-NH2)as a grafting agent in aqueous solution.The influence factors,which may affect the dyeing behavior of the HBP-NH2 grafted oxidized cotton fabrics in salt-free reactive dyeing,such as the aldehyde content of oxidized cotton fabrics,concentration of HBP-NH2 aqueous solution,pH value,reaction temperature and time were discussed.As a result,prepared under the optimum condition,the aldehyde content of oxidized cotton fabrics about 8mmol/g,HBP-NH2 10g/L,pH value 7.0～8.0,60°C for 5 min and then rinsed with tap water,the HBP-NH2 grafted oxidized cotton fabrics showed satisfied dyeing properties when dyed with reactive dyes without salt.