支化结构对树枝状聚合物静态吸附特征的影响  

Effect of Branched Structure on the Static Adsorption Characteristics of Dendronized Polymers

作　　者：赖南君[1,2,3] 张艳[1] 刘艳勤[1] 周宁[1] 李屹洋 

机构地区：[1]西南石油大学化学化工学院,四川成都610500 [2]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500 [3]聚合物分子工程国家重点实验室(复旦大学),上海200433

出　　处：《精细化工》2015年第8期921-925,共5页Fine Chemicals

基　　金：国家自然科学基金(51404208);油气藏地质及开发工程国家重点实验室(西南石油大学)开放基金(PLN1433);聚合物分子工程国家重点实验室(复旦大学)开放基金(K2013-10);西南石油大学开放课题(KSZ14072;KSZ14090)~~

摘　　要：采用浸泡法研究了不同支化程度的驱油用树枝状聚合物在石英砂上的静态吸附特征,并利用动静态激光光散射仪和环境扫描电子显微镜测定了聚合物溶液的分子尺寸和微观结构。结果表明,不同支化程度的树枝状聚合物溶液的等温吸附曲线均呈现三段式的吸附特点;在初始阶段,支化结构小的聚合物支链条数较少以及流体力学半径较小,其在固定表面积的石英砂上吸附位阻比支化结构大的聚合物小,导致吸附量较大;在吸附形式为多层吸附的Ⅱ、Ⅲ阶段,支化程度大的聚合物支化链间相互作用越强,易缠结形成网络结构,致使其在石英砂表面吸附层数多,吸附量比支化程度小的聚合物多。Static adsorption characteristics of dendronized polymers for EOR at different branching degree on quartz sand were studied via soaking method, and the molecular size, microstructure of polymer solution were investigated through dynamic and static laser light scattering instrument and environmental scanning electron microscope respectively. It was found that all of the isothermal adsorption curves of the dendronized polymer solutions presented three-stage characteristics;At the initial stage, polymers having small branching degree had smaller sterie hindrance than polymers of large branching degree on quartz sand possessing constant surface area due to its fewer number of branched chains and smaller hydrodynamic radius, resulting in its greater adsorption capacity. In the phase of multilayer adsorption, dendronized polymers having strong branching degree could and form a network structure because of the intense interaction of that its adsorption layer and adsorption quantity on the quartz sand weak branched degree. branched chain, leading surface were more easily wind to the fact than polymers of

关 键 词：树枝状聚合物 静态吸附 流体力学半径 微观结构 油田化学品与油品添加剂 

分 类 号：O647.314[理学—物理化学] TE357.46[理学—化学]