液界面的扩张粘弹性.pdf

《液界面的扩张粘弹性.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~(WuliHuaxueXuebao1MayActaP．一Chim．Sin．2016，32(5)，1227—12351227[Article]doi：10．3866／PKU．WHXB201602223WWW．whxb．pku．edu．cn眯唑基表面活性离子液体在气／液界面的扩张粘弹性李燕柴金岭(山东师范大学化学化工与材料科学学院，山东高校化学成像功能探针协同创新中心，济南250014)摘要：合成了两种咪唑基表面活性离子液体，通过界面膨胀流变法研究了其在气／液界面的聚集行为，考察了咪唑基表面活性离子液体浓

2、度、无机盐和温度对聚集行为的影响。研究发现，咪唑基表面活性离子液体在吸附过程中吸附控制占主导作用，而弛豫过程不是单一指数函数；加入无机盐或升高温度可以提高咪唑基表面活性离子液体的表面活性、增强其在界面的吸附能力、降低表面张力。扩张流变结果显示扩张模量、弹性模量和粘性模量随震荡频率增加而增加；随表面活性离子液体浓度增大，扩张模量先增大后减小。扩张模量随温度升高或无机盐(NaBr或CaBr2)的加入而降低。表面活性离子液在气，液界面形成的吸附膜以弹性模量为主，而且CmimBr的界面膜弹性模量大于C，：mimBr的界面

3、膜弹性模量。关键词：吸附动力学；扩张模量；气，液界面；咪唑基表面活性离子液体中图分类号：0647DilationalViscOeIasticityofImidazole-BasedSurfaceActiveIonicLiquidsattheAir／WaterInterfaceLlYlanCHAIJin—Ling(CollaborativeInnovationCenterofFunctionalizedProbesforChemicallmaginginUniversitiesofShandong,Collegeo

4、fChemistry,ChemicalEngineeringandMaterialsScience,ShandongNormalUniversity,Jinan250014,PR．China)Abstract：Twoimidazole—basedsurfaceactiveionicliquids(mimBr)weresynthesized，andtheiraggregationbehaviorattheair／waterinterfacewasstudiedv／aanoscillatingbubblemethod

5、．TheeffectsoftheCmimBrconcentration，inorganicsalts(NaBrandCaBr2)，andtemperatureontheaggregationbehaviorwereinvestigated．Theresultsoftheadsorptiondynamiceshowedthattheadsorption．controlledprocessdominated，buttherelaxationprocesswasnotpurelymono—exponentia1．The

6、additionofinorganicsaltorincreaseintemperatureimprovedthesurfaceactivityoftheCmimBrandloweredthedynamicsurfacetension．ThedilationalrheologicaIresultsrevealedthatthedilationaImodulus，elasticmodules，andviscousmoduleslncreasedwithincreasingoscillatingfrequencies

7、．andthemodulusreachedamaximumvaluewithincreasingCmImBrcOncentratiOn．Increasingthetemperatureoraddinginorganicsalts(NaBrorCaBr2)decreasedthedilationalmodulus．TheelasticmoduluswasdominantfortheCmimBrlayer,andtheelasticmodulusofC14mimBrwasIargerthanthatOfC12mimB

8、KeyWords：Adsorptiondynamics；Dilationalmodulus；Air／waterinterfaceImidazole-basedsurfaceactiveionicliquid1Introduction(ororganic)anion，possessmanyexcellentproperties，suchasIonicliquids(ILs)