疏水缔合聚丙烯酰胺临界胶束浓度的测定及微观结构的研究  

Determination of Critical Micelle Concentration and Microstructure of Hydrophobically Associating Polyacrylamide

作　　者：田宜灵[1,2] 邱丽娟[1,2] 曹利千[1,2] 朱荣娇[1,2] 

机构地区：[1]天津大学理学院,天津300072 [2]天津化学化工协同创新中心,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2016年第1期9-14,共6页Journal of Tianjin University：Science and Technology

基　　金：天津大学自主创新基金资助项目(60302013)

摘　　要：以胜利油田提供的疏水缔合聚丙烯酰胺(HAPAM)为主要研究对象,通过电导率法和荧光光谱分析法测定了HAPAM的临界胶束浓度(CMC),用黏度法测定了HAPAM的临界缔合浓度(CAC),并分析了该聚合物的疏水缔合行为和性能.通过扫描电镜(SEM)、原子力显微镜(AFM)和冷冻蚀刻技术观察了不同质量浓度下HAPAM溶液的微观结构.结果表明:该HAPAM分子在溶液中随着质量浓度的增大,疏水缔合作用逐渐增强,进而形成超分子聚集体;随着质量浓度进一步增加,高分子链束相互碰撞、缠绕的几率增加,最终形成网孔密集的空间网络结构.Hydrophobically associating polyacrylamide（HAPAM）provided by Shengli Petroleum Administration was studied. The critical micelle concentration（CMC）of the HAPAM was determined by using the conductivity and fluorescence spectrum methods. The critical association concentration（CAC）of the HAPAM was determined by using the viscosity method. At the same time,the associating behavior and solution properties in aqueous solutions were also studied. The microstructures of the HAPAM solution at different mass concentrations were observed and investigated by using scanning electron microscopy（SEM）,atomic force microscopy（AFM）and freeze-etching techniques. The results showed that as the mass concentration of HAPAM rising,the hydrophobic association gradually increased and the supramolecule aggregate was formed. With further increasing in the mass concentration of HAPAM,the network solution structure with dense meshes was eventually built under the interaction of colliding and twining of the polymer chain.

关 键 词：疏水缔合聚丙烯酰胺(HAPAM) 临界胶束浓度(CMC) 临界缔合浓度(CAC) 微观结构 电导率 荧光光谱分析 扫描电镜(SEM) 原子力显微镜(AFM) 

分 类 号：TQ317.5[化学工程—高聚物工业]