HPAM在油水界面的吸脱附作用研究

Research of Adsorption and Desorption Behavior of HPAM in the Oil-water Interface

陈文娟 张健 靖波 檀国荣 王虎 段明

CHENWenjuan ZHANG Jian JING Bo TAN Guorong WANG Hu DUAN Ming

为了弄清聚合物HPAM油水界面的吸附规律，利用双偏振干涉测量（DPI）技术研究聚合物HPAM在油水界面的吸脱附行为，建立了热力学和动力学模型，揭示聚合物的吸脱附作用并探究其机理。研究结果表明，HPAM在油水界面呈现快速吸附-慢速脱附的化学吸脱附过程。最大平衡吸附量随着聚合物浓度、相对分子质量、疏水 单体含量的增加显著增大。吸附动力学参数符合伪一级动力学方程。不同浓度下，聚合物的伪一级反应速率常数K 变化不大，约为0.029 s-1。经过较长时间脱附后，油水界面上仍然有残留聚合物，且残余量随浓度的增大而增加。图8 表5 参27

In order to understand the laws of HPAM adsorption and desorption，the dual polarization interferometry （DPI） technology was introduced to study the microcosmic adsorption and desorption behavior of polymer in the oil-water interface，the thermodynamic and kinetic model for polymer adsorption was established，and then the mechanism of the polymer adsorption in oil-water interface could be revealed from molecular level，providing new ideas and theoretical basis in the treatment of polymer-contained water. It was demonstrated that polymer displayed fast adsorption-slow desorption process in the oil-water interface. The maximum adsorption showed a linear relationship with the polymer concentration. The polymer adsorption capacity was significantly affected by the polymer molecular weight，hydrolysis degree and hydrophobic monomer content. Absorption kinetic parameters conformed to the pseudo-first order kinetic rule. Under different concentration，the corresponding reaction rate constant K was 0.029 s-1. After long time desorption，there were still residual polymer in the oil-water interface. The residual quantity increased with the increase of polymer concentration.

10.19346/j.cnki.1000-4092.2017.02.019