AM/[APy]Br共聚物粘土抑制剂的制备及性能评价

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(Na HSO3)=1∶1,反应温度50℃。并对AM/[APy]Br进行了FTIR和1HNMR表征,对其性能进行了评价。结果表明,在室温下,2 000 mg/L AM/[APy]Br溶液防膨率为80.90%,当温度为90℃时,其防膨率仍达77.97%;2 000 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晶层间距(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)。

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

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).