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时间:2020-03-26
《支状嵌段聚醚的界面聚集行为及对原油乳状液的破乳作用.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学~(WuliHuaxueXuebao)JuneActaP.一Chim.Sin.2013,29(6),1253-12591253[Article]doi:10.3866/PKU.WHXB201303251Ⅵr、删.whxb.pku.edu.cn支状嵌段聚醚的界面聚集行为及对原油乳状液的破乳作用翟雪如’刘腾’徐桂英檀国荣吕鑫张健(山东大学胶体与界面化学教育部重点实验室,济南250100;中海油研究总院技术研发中心,海洋石油高效开发国家重点实验室,北京100027)摘要:合成了三种不同聚氧丙烯,聚氧乙烯(PPO/PEO)比例的含苯环支状嵌段聚醚,通过界面张力、界面流变、表面压
2、以及对原油乳状液的破乳脱水效果的测定。考察了其界面聚集行为和破乳作用对PEO含量和分子量的依赖性,并且对比研究了三种支状聚醚分子交联前后的破乳性能.结果表明,PEO含量高且分子量大者,其单分子界面占据面积大,在油,水界面达到吸附平衡的时间短,其油/水界面扩张模量及扩张弹性均高于PEO含量较少者.但是对原油乳状液的破乳脱水效果则是PEO含量居中的聚醚最好.温度影响和交联与否的研究表明,交联并不能提高分子量较大的聚醚对原油乳状液的破乳效果,温度对聚醚分子交联前后的破乳效果有不同的影响规律.本研究可为原油集输过程中化学品的选择与应用提供一定的依据.关键词:支状嵌段聚醚:界面活性:界面流
3、变性:破乳作用中图分类号:0648AggregationBehaviorofBranchedBlockPolyethersatInterfaceandTheirDemulsificationforCrude0ilEmulsionZHAIXue—Ru’LIUTeng’XUGui-Ying’。TANGuo-RongLUXinZHANGJian(KeyLaboratoryofColloidandInterfaceChemistry,MinistryofEducation,ShandongUniversity,Jinan250100,PR.China;StateKeyLaboratory
4、ofOffshoreOilExploitation,TechnologyResearchDept.CNOOCResearchCentecBeijing100027,PR.China)Abstract:Threepoly(propyleneoxide)-poly(ethyleneoxide)branchedblockpolyetherscontainingabenzeneringmoletyweresynthesized,withdiferentmolecularweightsandpropyleneOxide/e廿1yIeneoxide(PPO/PEO1compositions.
5、Theiraggregationbehaviorsataiflwaterandoil/waterinterfaceswereinvestigatedbyinterfaciaItension.surfacepressureandinterfaciaIdilationalrheologymethods.Aggregationandtheemulsionbreakingproperties(demulsification)forcrudeoilwerestudiedbasedonthepolymerPEOcontentandmolecularweight.Thedemulsificat
6、ionperformanceofthesepolyethersandtheircrosslinkedcounterpartswerecomparedatdiferenttemperatures.TheresultsshowedthatapolyetherwithahigherproportionofPEOgroupsandlargermolecularweightoccupiedalargerareaattheair/waterinterface.reachedequilibriumfaster,andfeaturedaIargerdilationalmodulusattheoi
7、l/waterinterface.However,thedemulsificationexperimentsshowedthatthepolyetherwithamoderateIevelofPE0contentgavebetterperformance.ThecrossIinkingmethoddidnotimprovedemulsificationabilityinthepolyetherwithlargemolecularweights.Temperaturewasalso
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