以餐厨废油制备了生物基两性表面活性剂,应用界面张力和动态光散射方法,研究了该生物基两性表面活性剂体系的油水界面性能及在溶液中的聚集行为.在无外加碱条件下,由餐厨废油制备的表面活性剂表现出良好的界面性能,在50～70℃以及pH值为7～12的条件下,均可以将油水界面张力降至超低值(＜10-3 mN/m),在不同的油藏模拟地层水中均保持较好的界面活性;分别在50、-20和4℃下保存,其界面活性均未受到明显影响.在水溶液中形成的聚集体的平均流体力学半径为10 ～ 30 nm,无机盐离子的加入可使聚集体的粒径上升.基于其优良的界面性质和可再生来源,由餐厨废油制备的生物基两性表面活性剂在三次采油方面具有重要的应用价值.
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