摘要
为揭示化学驱体系中聚合物以及油相中活性物质对甜菜碱降低界面张力作用的影响规律,研究了部分水解聚丙烯酰胺和疏水缔合聚合物对甜菜碱溶液与正癸烷间动态界面张力的影响,考察了正癸烷中加入油酸对甜菜碱及甜菜碱与聚合物二元复配体系界面张力的影响。研究结果表明,甜菜碱类表面活性剂的亲水基团尺寸大于疏水基团,相应体系与正构烷烃间的界面张力较高;油相中的油酸与甜菜碱混合吸附,能明显降低界面张力。部分水解聚丙烯酰胺通过混合吸附使得甜菜碱溶液与正癸烷的界面张力总体上呈升高趋势;而疏水缔合聚合物与甜菜碱形成界面混合聚集体,造成界面张力升高。在油酸存在的条件下,两类聚合物对模拟油与甜菜碱间界面张力的影响趋势与正癸烷相近。
To expound the effect rules of polymers in chemical flooding systems and active components in oil on the interfacial tension （IFT） reduction by betaine, the influences of partially hydrolyzed polyacrylamide and hydrophobically associating polymer on the dynamic IFT between betaine solution and n-decane were investigated. The influences of oleic acid in n-decane on IFT of betaine solution and betaine/polymer binary systems were studied. The experiment results showed that the hydrophilic part of betaine molecule was larger than hydrophobic part, which resulted in higher IFT against n-decane. The compact film formed by the mixed adsorption of betaine and oleic acid molecules resulted in the decrease of IFT. The addition of partially hydrolyzed polyacrylamide made the dynamic IFT between betaine solution and n-decane increase in general by the formation of mixed films. The interracial aggregates formed by hydrophobic associated polymer and betaine molecules resulted in the increase of IFT values. The two types of polymers showed similar influence trends on the IFTs between betaine solution and model oil in the presence of oleic acid to those of n-decane.
出处
《油田化学》
CAS
CSCD
北大核心
2017年第1期155-158,164,共5页
Oilfield Chemistry
基金
国家科技重大专项资助项目"高温高盐油田化学驱提高采收率技术"(项目编号2016ZX05011003)
关键词
甜菜碱
部分水解聚丙烯酰胺
疏水缔合聚合物
油酸
界面张力
betaine
partially hydrolyzed polyacrylamide
hydrophobically associating polymer
oleic acid
interfacial tension
