实验及模拟研究两性疏水缔合聚合物增黏机理

两性疏水缔合水溶性聚合物具有良好的耐温、耐盐、耐剪切性能,在三次采油、酸化压裂等领域具有较大的应用潜力。室内合成了一种新型两性疏水缔合水溶性聚合物,分别研究了其水溶液在不同浓度、剪切和温度条件下的黏度变化情况。同时,利用耗散粒子动力学模拟(DPD)方法对其水溶液在不同浓度、剪切和温度条件下的水珠子扩散速率和疏水缔合聚合物的自组装结构进行了模拟研究。实验和模拟结果基本一致,利用耗散粒子动力学方法进一步证明了两性疏水缔合聚合物在水溶液的增黏机理和微观自组装结构。

Thickening mechanism of amphoteric hydrophobically associating polymer by experimental study and simulation

Amphoteric hydrophobically associating polymers possessing good temperature resistance, salt tolerance, and shear stability have great potential in applications on tertiary oil recovery, acidizing, fracturing, et al. A novel amphoteric hydrophobically associating polymer was prepared and the effects of concentration, shear rate, and temperature on the viscosity of polymer solution were investigated. Meanwhile, the diffusivity rates of water beads and self-assembly structures of amphoteric hydrophobically associating polymer in solution were investigated under different concentration, shear rate, and temperature by Dissipative particle dynamics simulations. Experimental results accord with simulations, which increasingly testifies the thickening mechanism and self-assembly structures of amphoteric hydrophobically associating polymer in solution.