复合网络絮凝剂的合成及性能研究

Synthesis and properties of composite network flocculants

采用反相乳液聚合法获得大分子量的聚合物,以煤油和氯化石蜡作为分散相,用丙烯酰胺(AM)构筑大分子骨架的基础上,引入阳离子单体二甲基二烯丙基氯化铵(DMDAAC)形成大分子链,再引入水玻璃和铁离子,形成多核络合离子。研究了油水比、引发剂用量、单体浓度、聚合反应温度等因素对产物处理污水能力的影响。结果表明,最佳反应条件为:油水比为1∶2,引发剂用量为0.4%,单体浓度为45%,反应温度为40℃,当絮凝剂加量为25 mg/L时,处理后的污水透光率达到98.5%,具有较好的絮凝效果。

Adopted inverse emulsion polymerization method to obtain a high molecular weight polymer, with kerosene and paraffin as dispersed phase;using acrylamide （AM） construct molecular skeleton, and then leading cationic monomer dimethyl diallyl ammonium chloride （DMDAAC） into it to make macromo lecular chains ; adding water glass and iron ions to form polynuclear complex ions. Based on the capacity of treatment, some factors were studied, such as the ratio of volume of oil to water, the initiator dosage, the concentration of monomer, polymerization temperature and so on. The result shows that the optimum reac tion condition are as follows ：the ratio of volume of oil to water is 1：2, the initiator dosage is 0.4%, the concentration of monomer is 45%, polymerization temperature is 40 ℃ ;it has the best treatment result, whose treated wastewater transmission rate reached 98.5% ,when the flocculant dosage is 25 mg/L.