Abstract:

Chitosan-g-N-carboxymethyl-2-sulfo-4,5-2H imidazolinone (CSIDZ)with different grafting ratios polymers were synthesized ith 2-bromoacetic acid、Chitosan、2-sulfo imidazolinone as raw materials .Their physical and chemical characteristics were studied. Adsorption of synthesized polymers for metal ions such as: Cd²⁺，CrO4^2-,Fe³⁺,Cu²⁺,Pb²⁺ were determined with EDTA complex titration; The antibacterial activity of the grafted polymer was examined against a series of test microorganism by quantitative suspension method; corrosion inhibition efficacy of the synthesized polymer in 1 mol/L HCl solutions for N80 steel panel was measured by weight-loss method. Results from the experiments indicate that the partially grafted CSIDZ made the adsorption action of partially grafted CSIDZ to most tested metal ions to retain higher thermal stability than small molecule-CSIDZ, the grafted polymer  bears a relatively strong antibacterial activity, its MIC(minimal inhibited concentration )is 5.10 g/L and it has  a higher thermal stability than small molecule inhibitor-CSIDZ. Its inhibition efficiency still amounts to 71.1％ when temperature reaches to 90 ℃ and its amount is only 1/2 that of CSIDZ.   

Key words: N-carboxymethyl-2-sulfo-4,5-2H imidazolinone grafting polymerization Chitosan antibacterial activity metal ions adsorption corrosion inhibition