| The grafted-copolymers of chitosan with (meth)acrylates, such as (dimethylamino)ethyl methacrylate (DMAEMA), methyl methacrylate (MMA), methyl acrylate (MA) and 2-hydroxyethyl methacrylate (HEMA), were synthesized by radical polymerization, using ceric ammonium nitrate as an initiator in acetic acid solution. The effects of reaction variables including the amounts of monomer and initiator, reaction time and reaction temperature on the grafting percentage (G%) and grafting efficiency (E%) have been investigated. The effects of molecular weight of chitosan and the amount of chitosan, as well as pH value, on particle size and size distribution index of grafted products have been discussed. Grafted copolymers were characterized by FTIR, solid-state 13C NMR, TEM. The thermal stability of chitosan and grafted products were studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC).Surface tension measurement fluorescent study and conductance measurement confirmed that the grafted copolymer Chitosan-g-PDMAEMA exhibited an amphiphilic structure and aggregation in aqueous solution.In addition, we applied grafted products in fabric treatment to protect the silk textile from shrinking and being attacked by bacteria. |
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