AM/[APy]Br共聚物粘土抑制剂的制备及性能评价

Preparation and Properties of AM/[APy]Br Copolymer as Clay Inhibitor

摘要:

以丙烯酰胺（AM）和溴化N-烯丙基吡啶（[APy]Br）为单体，制备了一种离子液体聚合物黏土抑制剂AM/[APy]Br。通过单因素实验法确定了最佳反应条件为：m(AM) : m([APy]Br)=15:1，w(引发剂)=0.8%，其中，n(K2S2O8) : n(NaHSO3)=1:1，反应温度50 oC。并对AM/[APy]Br进行了FT-IR和1H NMR表征，对其性能进行了评价。结果表明：在室温下，2000 mg/L AM/[APy]Br溶液防膨率为80.90%，当温度为90 oC时，其防膨率仍达77.97%；2000 mg/L AM/[APy]Br溶液与0.3 mol/L KCl溶液复配后，防膨率可达96.20%；与0.2 mol/L KCl溶液复配后，防膨率高于0.3 mol/L KCl溶液，复配溶液经4次冲刷，防膨率仍可达76.17%；占溶液总质量3.0% AM/[APy]Br与3.0% KCl复配溶液浸泡后的Na-MMT晶层间（1.57 nm）明显优于单独使用同等浓度KCl浸泡后的Na-MMT晶层间距（1.62 nm）。

Abstract:

An ionic liquid polymer was synthesized using acrylamide (AM) and bromide N-allylpyridine ([APy]Br) as clay inhibitor. The optimum synthetic conditions were investigated by single factor method. The results were as follows: m(AM):m([APy]Br)=15:1, w(initiator)=0.8%, the molar ratio of K2S2O8 and NaHSO3 was 1:1, the reaction temperature was 50 oC. The polymer was characterized by FT-IR and 1H NMR. It was found that the anti-swelling rate was 80.90% under 2000 mg/L of AM/[APy]Br solution at room temperature, and the anti-swelling rate could remain 77.97% at 90 oC. When 2000 mg/L polymer solution was combined with 0.3 mol/L KCl, the anti-swelling rate could reach 96.09%. 0.2 mol/L KCl combined with 2000 mg/L AM/[APy]Br gave higher anti-swelling rate than 0.3 mol/L KCl solution, and when it was scoured four times, the anti-swelling rate was still 76.17%. The d-spacing of sodium montmorillonite (Na-MMT) was 1.57 nm when soaked in the mixed solution which contained 3.0% AM/[APy]Br and 3.0% KCl, which was less than the d-spacing of Na-MMT soaked in KCl solution(1.62 nm).