一种用于处理含聚污水的共聚物P［DPM/ DC12MAAC］的合成与性能评价*

Synthesis and Evaluation of P［DPM/DC12MAAC］for Treating Polymerized Sewage

张 玮 龙卫红

ZHANG Wei LONG Weihong

首先合成了具有两个长疏水链可聚合表面活性剂双十二烷基甲基烯丙基氯化铵（DC12MAAC），通过测试 的红外光谱和核磁共振氢谱，证实了其结构。通过将DC12MAAC与N-（3-二甲氨基丙基）甲基丙烯酰胺（DPM） 进行共聚合成了一种P［DPM/DC12MAAC］共聚物絮凝剂；以单位表面积铁片增重量及浊度降低率为评价指标， 通过单因素法优化了共聚反应的条件，得到的最佳反应条件为单体质量分数为50%，单体DPM、DC12MAAC质 量比为 100∶2，引发剂质量分数为0.8%，聚合反应时间为6 h，聚合反应温度为60℃。采用P［DPM/DC12MAAC］ 处理含聚污水后浊度降低率最高为99.53%，单位表面积铁片增重量最低为43.02 g/m2，可减少絮体74.90%（油田 在用絮凝剂的处理结果为171.39 g/m2 ）。P［DPM/ DC12MAAC］的表界面活性较好，推测其清水机理为通过静电 吸附破坏油滴的扩散双电子层从而中和其表面负电荷。图11参17

Firstly，polymerizable surfactants DC12MAAC with long hydrophobic chains were synthesized，and their structures were confirmed by IR and 1 H NMR analysis. Next，the copolymer P［DPM/DC12MAAC］was synthesized by copolymerization of dimethylaminopropyl methacrylamide（DPM）with the DC12MAAC. Using weight increment of iron sheet per unit surface area and turbidity reduction rate as evaluation indexes，the reaction conditions of copolymerization were optimized by single factor method. The optimum reaction conditions were obtained as follows，the monomer concentration was 50%，the monomer ratio of DPM to DC12MAAC was 100∶2，initiator concentration was 0.8% ，the reaction time was 6 h and the reaction temperature 60℃ . The evaluation of flocculation effect of P［DPM/C12DMAAC］showed that the highest turbidity reduction rate was 99.53%，the lowest weight gain of iron sheet per unit surface area was 43.02 g/m2，which could reduce flocs by 74.90%，composed of the result of flocculant treatment in oilfield，being of 171.39 g/m2. P［DPM/DC12MAAC］had good surface and interface activity. It was speculated that the principle of clean water was to destroy the diffusion double electron layer of oil droplets through electrostatic adsorption to neutralize the negative surface charge.

10.19346/j.cnki.1000-4092.2020.03.024