阴离子聚丙烯酰胺/三乙醇胺超分子体系的表征及性能

Characterization and Property of Sulfonated Polyacrylamide/triethanolamine Supramolecular System

研究了水溶液和模拟矿化水溶液中带有负电荷的磺化聚丙烯酰胺(SPAM)与三乙醇胺(TEA)之间的相互作用及形成的超分子体系的结构特征,考察了超分子体系的形成对SPAM形貌、流体力学直径、zeta电位、黏度及流变学性质的影响.研究结果表明,超分子体系的形成有利于提高磺化聚丙烯酰胺的黏度、抗剪切性、剪切回复性及抗温耐盐性.

Polymer flooding technology is one of the preferred ＂enhanced oil recovery＂（ EOR） technologies used for improving oil recovery. Among the various chemical reagents for polymer flooding technology,polyacrylamide has attracted more and more attention. To explore the improving effect of triethanolamine（ TEA） on sulfonated polyacrylamide（ SPAM）,the interaction of negatively charged sulfonated polyacrylamide with triethanolamine and the structure of SPAM/TEA supramolecular system were investigated in aqueous solution and mineralized water by means of transmission electron microscopy（ TEM）,viscosity,dynamic light scattering（ DLS）, zeta potential and rheological experiments. The results indicate that, through the cooperative contribution of electrostatic and hydrogen bond interactions,SPAM and TEA can form a large supramolecular assembly with an average diameter of 780 nm measured by DLS. Significantly,the formation of SPAM/TEA supramolecular system can efficiently improve the viscosity and rheological properties of sulfonated polyacrylamide. In addition,the nearly neutral zeta potential of SPAM/TEA supramolecular system can decrease the affect of Ca2＋and Mg2＋cations in the mineralized water.