bola型组氨酸基表面活性剂h2d及其复配体系的气液界面吸附

《bola型组氨酸基表面活性剂h2d及其复配体系的气液界面吸附》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、优秀毕业论文张燕：Bola型纽氨酸基表面活性剂(H2D)及其复配体系的气／液界面吸附AbstractThewidespreaduseofsurfactantsinthehugevarietyoffields(suchasdetergency，moistening，emulsification，dispertionandfoamformation)，istypicallybasedontheiradsorptionbehaviorattheair—waterinterface，andhence，thestudyofthisbehaviori

2、sanimportantsubjectthatscientistsalwaysconcern．Forbolaformsurfactants，thestudyofadsorptionbehaviorcurrentlyisonlyabouttheadsorptionequilibriumstate，andthestudyonthedynamicadsorptionprocessandadsorptionintheexternalperturbationhasneverbeenreported．Inthispaper，anovelbolafor

3、msurfactant，1，12-dihistidinediaminododecane(H2D)，withbiodegradabilityandbiologicalcompatibility，wasselectedastheresearchobject．Theadsorptionbehaviorsattheair-waterinterfaceofH2DandthemixedsystemsofHzD／smallsurfactant(CTAB)andH2D／polymer-basedsurfactant(chitosan—basedsurfa

4、ctant)werestudiedbysurfacetension，dynamicsurfacetension，surfacedilationalviscoelasticityandothermethods．Thefollowedarethemainresults．1．InH2D／saltsystem，H2DadoptedareversedU—shapedconformationoncetheadsorptionsaturationstatewasreached．TworelaxationprocesseswereobserveforH2

5、D，whicharefastprocessandslowprocess．TheformeronewascausedbythemoleculardiffusionfrombulktointerfaceandthelatteronewascausedbytherelaxationofH2Dmoleculesatinterface．Moreover，thedynamicadsorptionbehaviorofH2Dwasrelatedtotheagingtime，solutionconcentration，electricofH2D，thety

6、peandconcentrationofelectrolyte，andtemperature．Intherangeoftheexperimentalconditions，thestabilityofH2Dmembranewasthebestwhentheconcentrationofsaltwas0．3mol／LandpHvaluewas8．2．2．ForH2D／CTABmixedsystem，thecriticalmicelleconcentration(cmc)wasslightlylowerthanthatofpureCTABsys

7、temandaminimumsurfacetensionwasappeared．Moreover，whentheconcentrationofthemixedsolutionislessthancmc，itsabilitytoreducethesurfacetensionwasimproved，andthesurfacedilationalviscoelasticityandIII精品参考文献资料优秀毕业论文扬州人学硕：I：学位论义relaxationprocessweredifferentfrompuresystem，suggestin

8、gboththeH2DandCTABaffecttheinterfacepropert_ies．Howerver，whentheconcentrationofmixedsolutionwash