Preparation And Physicochemical Properties Of Imidazolium Acetates And Volumetric Properties Of Binary System

The imida zo lium acetates belo ng to more gree n and sa fe ionic liq uids. Withuniq ue che mica l properties, imidazo lium acetates were used widely in so me fie lds,such as bioche mica l ind ustry and environme nt etc. By the research on thephys icoche mica l properties and binary solutio ns of imida zo lium acetates, theparticular properities and disso lvant characteristic can be comprehe nded in deep,for the research of the relevant fields, the Theoretical Bases can be provided.Now, with respect to the io nic liquids o f imidazo lium acetates, coverliterature was nothing muc h.The date of phys icoche mica l properties and theproperties o f b inary so lutions o f imida zo lium acetates lack suffic iently. So thisthesis mainly concluded the following works:（1） The ionic liq uids1-methylimidazo lium acetate （[Mim]Ac）,1,3-dimethy-limida zo lium acetate （[Mmim]Ac）, and1-ethyl-3-methylimida zo lium acetate（[Emim]Ac） were prepared. The ana lytica l approach of them were IR spectra, UVspectra and Elemental analysis.（2） The ir dens ities, conductivit ies, and the abso lute viscosities of [M im]Ac,[Mmim]Ac and [Emim]Ac were measured at te mperatures ranging fro m293.15to338.14K, then the correspond ing mo lar conductivities and the kine maticviscosities were also ca lculated. The dependences of the dens ities, conductivit ies,mo lar cond uctivities, absolute viscos ities, and the k ine matic viscos ities v stemperatures were obtained respective ly by the least-square method. Theinfluences o f the a lk yl cha ins at3-positio n N atom o f imidazo le ring on the abovefive phys icoche mica l properties of imida zo lium acetates were discussedrespectively.（3） The dens ities o f b inary so lutions o f [M im]Ac {or [M mim]Ac or[Emim]Ac}（1）-H₂O （or EtOH）（2） at293.15K were measured by use of thehydro metermethod, the mo lar fractions of benzene for the binary solutio n is fro m0to1. The apparent mo lar vo lumes, the excess molar vo lumes and the solventrelaxatio n coeffic ient of The densities of binary solutio ns were separately calculated fro m the dens ity data, and the optimized dependences between apparentmo lar vo lumes and mo lar fractions were also determined, respective ly, by thenonlinear least-square Regress ion. Another the excess mo lar vo lumes for thebinary solutio n were fitted by the fourth-order Redlich-Kister equat ion we ll, so theRedlich-Kister coefficients and the excess molar volume extremum obtained.（4） The dens ities and conductivities of dilute solutio ns of [Mim]Ac {or[Mmim]Ac or [Emim]Ac}（1）-H₂O （or EtOH）（2） at293.15K were meas ured, andthe correspond ing mo lar conductivities were a lso ca lculated. The concentratio n o fdilute solutio ns would be limited into necessary scope, the dependences betweenconductivities and the square root of conce ntration were also determined,respective ly, by Kohlrausc h coeffic ie nts and the no nlinear least-squareRegress ion, so the the e xcess mo lar cond uctivities obtained. The cond uctivities o fbinary so lutio ns of [M im]Ac {or [Mmim]Ac or [Emim]Ac}（1）-H₂O （or EtOH）（2）at293.15K were meas ured over the full mo le fractions, and the correspondingmo lar conductivities o f the three imida zo lium acetates in the six binary solutio nswere also calc ulated. The influences of the polarity so lvent s ize on the aboveconductivities and mo lar conductivities of imida zo lium acetates were discussedrespectively.（5） Using1-ethyl-3-methylimidazo lium acetate （[Emim]Ac） processed cottonfabric, researched on the [Emim]Ac dye ing effect of the preliminary exploratio nthe imidazolium acetate in textiles with the application.