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Preparation and Application of Polyacrylamide-Grafted Starch Flocculant

机译：聚丙烯酰胺接枝淀粉絮凝剂的制备及应用

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A polyacrylamide-grafted starch (St-g-PAM) flocculant for the coal slurry wastewater, was prepared by using corn starch and acrylamide (AM) as monomers through solution polymerization. The structure of the synthesized St-g-PAM was characterized by FT-IR and TG. The effects of initiator concentration, reaction temperature, and monomer concentration on percentage of grafting and the grafting efficiency were investigated. The results show that the optimal conditions of the polymerization are as follows: the monomer to substrate ratio of 2.5, potassium persulfate of 0.08 g/mL, reaction time of 3h, the reaction temperature of 65°C. The additional dosage of St-g-PAM is varying between 35 and 45 mg/L to obtain good flocculation capability, better flocculation capability with the addition of 30mg/L of FeCl_3.
机译：通过使用玉米淀粉和丙烯酰胺（AM）作为单体通过溶液聚合制备用于煤浆料废水的聚丙烯酰胺接枝淀粉（ST-G-PAM）絮凝剂。合成的ST-G-PAM的结构特征在于FT-IR和Tg。研究了引发剂浓度，反应温度和单体浓度对接枝百分比和移植效率的影响。结果表明，聚合的最佳条件如下：基板比的单体为2.5，过硫酸钾，0.08g / ml，反应时间为3小时，反应温度为65℃。 ST-G-PAM的额外剂量在35至45mg / L之间变化，以获得良好的絮凝能力，并在添加30mg / L的FECL_3中获得更好的絮凝能力。

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