原子力显微镜与动态光散射研究疏水缔合聚丙烯酰胺微观结构  

Study on Microstructure of Hydrophobic Associating Polyacrylamide by Atomic Force Microscopy and Dynamic Light Scattering

作　　者：曲彩霞 李美蓉 曹绪龙[2] 张继超[2] 陈翠霞 黄漫 

机构地区：[1]中国石油大学(华东)理学院,青岛266580 [2]中国石化胜利油田地质科学研究院,东营257015

出　　处：《高分子通报》2013年第6期57-63,共7页Polymer Bulletin

基　　金：国家重大专项(2011zx05011-004);国家重大科技专项基金(No:2008ZX05011);国家"863"项目(No:2008AA092801)资助项目

摘　　要：驱油用疏水缔合聚丙烯酰胺(HAP)性能优劣由其微观结构决定,优选研究HAP微观结构的方法,方便现场准确筛选功能良好的驱油聚合物。本文通过原子力显微镜(AFM)和扫描电镜(SEM)观察了不同浓度HAP溶液的微观结构,动态光散射(DLS)与AFM分析了粒径分布。结果表明,随着聚合物浓度的增加,DLS测得粒径增大,粒径分布由单峰变为双峰;SEM观察到由无空间网络结构,到相对松散、易被盐破坏空间网络结构,再到不易被盐破坏的完整、致密的网络结构;AFM可以同时得到一定空间结构以及与DLS相符的粒径大小,三种方法综合比较发现,结合三种不同的表征手段能够较好的、较全面的表示HAP在溶液中的微观结构。The efficiency of hydrophobic associating polyacrylamide （HAP） used for polymer flooding is determined by its microstructure. The study on analysis means of the microstructure can contribute to screening good functional polymer systems for EOR. The atomic force microscopy （AFM） and scanning electron microscope （SEM） are used to observe the microstructures of HAP solutions at different concentrations, while dynamic light scatter （DLS） and AFM are iased to analyze particle size distribution. The DLS results show that as the concentration increases particle size is larger and double peaks appear~ the relatively loose network with weak salt resistant ability is replaced by dense network structure that is less susceptible to salt. Both the particle size by DLS and the microstructures can be measured by the AFM at the same time. The comparisons of three means at various solution conditions provide comprehensive characterization revealing the relation of structure and properties of HAP.

关 键 词：疏水缔合聚丙烯酰胺 微观结构 扫描电镜 原子力显微镜 动态光散射 

分 类 号：TE39[石油与天然气工程—油气田开发工程]