2.3. Synthesis of TM-GN-chitosan
TM-chitosan (1 g) was dissolved in 100 mL of 1% (v/v) lactic acid solution at RT overnight until completely dissolved. The requiredamount of GLU (0.25, 0.5, 0.75 or 1 g) was then added to give the final desired (w/w) ratio of TM-chitosan: GLU (1:0.25–1:1) andallowed to react for 24 h at 60◦C with stirring. The reaction mix-ture was then neutralized with 1 M NaOH and precipitated withan excess volume of acetone. The product was filtered and residualfree lactic acid and unreacted GLU were removed by dialysis againstdistilled water. The product was obtained after freeze-drying.