Chitosan derivative (RSCTS) was obtained by chitosan with salicylaldehyde.Carboxymethyl chitosan derivative (RS-CMC) was prepared by carboxymethl reaction in alkaline condition.

• 摘要壳聚糖(CTS)与水杨醛反应制得壳聚糖衍生物(RS-CTS)，在碱性条件下羧甲基化得羧甲基壳聚糖衍生物(RS-CMC)。