羧甲基壳聚糖降尘剂的制备及性能研究

Preparation of carboxymethyl chitosan and their dust falling properties

以氯乙酸改性壳聚糖制备羧甲基壳聚糖(CMCS)降尘剂的最佳反应条件为m(壳聚糖)/m(NaOH)=1.0,m(氯乙酸)/m(壳聚糖)=1.25,50℃下反应7h;用IR、XRD表征了CMCS;CMCS投加量0.8g/L,在pH值为3.5、温度21℃时,对于煤尘的去除率高达95.3%,且具有低残留、易降解、无污染等独特优点,在降尘领域中有着良好的应用前景。

In this paper,a carboxymethyl chitosan dust fall agent（chloroacetic acid modified chitosan,abbreviated as CMCS）has been prepared and characterized by FT-IR,XRD.The optimal synthetic condition was obtained as follows：m（chitosan）∶m（sodium hydroxide）=1.0,m（chloroacetic acid）∶m（chitosan）=1.25,reaction temperature was 50 ℃,reaction time was 7h.When the dosage was 0.8g/L,pH was 3.5,temperature is21 ℃,its dust fall rate could reach 95.3%,and it has low residue,easy degradation and no pollution.The CMCS dust fall agent has good application prospect in the field of dust.