以淀粉（strach）为原料，3-氯-2-羟丙基三甲基氯化铵（CHPTMAC）在碱性条件下进行醚化改性制备阳离子淀粉絮凝剂（MSF），采用正交单因素实验对反应条件进行优化。用环境扫描电子显微镜（ESEM）、傅立叶变换红外光谱仪（FTIR）、热分析仪（TGA）对样品结构及性能进行表征。结果表明：季铵化淀粉絮凝剂的制备条件为40％NaOH的添加量5 mL，m（starch）∶m（CHPTMAC）＝1∶1，水浴温度为55℃条件下反应5 h制备出的MSF絮凝性能最好，当MSF用量为50mg·L－1对油墨废水CODCr去除率为84.6％，并且此时的絮凝剂表征结果显示其结构规整，排列致密且拥有良好热稳定性。%A novel flocculant,denoted as MSF,was prepared using starch as raw material,3-chloro-2-hydroxypropyl trimethyl am-monium chloride as cationic etherification agent under basic condition. Orthogonal experiment and the single factor experiments were adopted to optimize the reaction conditions. The structures of MSF were characterized by FT-IR,ESEM and TGA. The optimization conditions were summarized as follows:the amount of 40%NaOH was 5mL,the mass ratio of starch to etherification agent value was 1,the reaction temperature was 55℃,and the reaction time was 5 hours. Under the above optimal conditions,the obtained flocculant showed high CODCr removal,i. e. ,84.6%for the ink wastewater. The characterization results showed that the MSF’s structure was neat,arrange compact and had good thermal stability. By ESEM,it could be seen that strach had obvious changes,conforming to the etherification of strach modification.
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