碱对部分水解聚丙烯酰胺分子聚集形态的转变影响  

Effect of alkali on transformation of aggregation morphology of partially hydrolyzed polyacrylamide

作　　者：陈灿灿 孙灵辉[2,3] 刘先贵 萧汉敏[2,3] 张志荣 冯春[1,2,3] 李博文 孙东盟 CHEN Can-can;SUN Ling-hui;LIU Xian-gui;XIAO Han-min;ZHANG Zhi-rong;FENG Chun;LI Bo-wen;SUN Dong-meng(University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Percolation Fluid Mechanics,Chinese Academy of Sciences,Langfang 065007,China;Center for Enhanced Oil Recovery Research,PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China)

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院渗流流体力学研究所,河北廊坊065007 [3]中国石油勘探开发研究院提高采收率研究中心,北京100083

出　　处：《应用化工》2023年第1期295-299,308,共6页Applied Chemical Industry

基　　金：国家重大科技专项(2016ZX05010004-006);中石油科技攻关项目(2021DJ1103);中石油基金项目(2020D-5008-11)。

摘　　要：阐明碱对部分水解聚丙烯酰胺(HPAM)分子形貌的影响规律对其在提高原油采收率中的应用具有重要意义。使用激光扫描共聚焦显微镜(LSCM)、原子力显微镜(AFM)与冷冻刻蚀透射电镜(Cryo-TEM)三种技术联用的新方法观察了碱对聚丙烯酰胺溶液宏观黏度与微观分子形态的影响规律。结果表明,碱对聚丙烯酰胺溶液宏观黏度影响较大,反映到分子微观形态中,表现为随着碱含量的增多,LSCM观察到聚丙烯酰胺分子链由初始舒展的线性状态向蜷缩状态发生转变;AFM观察到单个分子由分散细棒状形态向颗粒聚集态转化;Cryo-TEM观察到分子膜状由线性舒展状态同样向颗粒聚集态转化。The influence of alkali on molecular morphology of partially hydrolyzed polyacrylamide(HPAM) is of great significance for its application in enhanced oil recovery.The effects of alkali on the macroviscosity and molecular morphology of polyacrylamide solution were observed by a new method combining laser scanning confocal microscopy(LSCM),atomic force microscopy(AFM) and cryo-etched-transmission electron microscopy(Cryo-TEM).The results showed that the influence of alkali on the macroscopic viscosity of polyacrylamide solution was significant, which was reflected in the molecular morphology.With the increase of alkali content, LSCM observed that the polyacrylamide molecular chain changed from the initial linear state to the curled state.AFM observed the transformation of single molecule from dispersed fine rod shape to granular aggregate state.Cryo-TEM observed that the molecular membrane also transformed from linear stretch state to granular aggregation state.

关 键 词：碱 聚丙烯酰胺 微观形貌 原子力显微镜 透射电镜 

分 类 号：TQ042[化学工程] TQ013TQ022