CAJ | 학술논문

合成了1-丁基咪唑醋酸盐([Bim]Ac)离子液体，通过1H-NMR、13C-NMR和IR对其结构进行了表征。在303.15 K和常压下，采用U形振荡管密度计测定了[Bim]Ac+甲醇、乙醇和正丙醇二元体系的密度，用乌氏黏度计测定了体系的黏度。由密度数据计算得到了体系的超额摩尔体积(VE)、表观摩尔体积(Vfi )、偏摩尔体积(V m,i )和超额偏摩尔体积( EV m,i )，由黏度数据获得了体系的混合黏度变化(?h)，并采用Redlich-Kister方程分别关联了VE、?h与组成的关系。结果表明：上述体系的VE在全浓度范围内均为负值，且在[Bim]Ac摩尔分数x1=0.3~0.4处出现极小值；Δη在全浓度范围也均为负值，在x1=0.4~0.5处出现极小值；[Bim]Ac+醇体系VE或?h的极值大小为：[Bim]Ac+甲醇<[Bim]Ac+乙醇<[Bim]Ac+正丙醇，表明[Bim]Ac与醇之间的相互作用随着醇极性的增加而增大。Redlich-Kister方程能较好地关联上述体系VE、?h与组成的关系。
합성료1-정기미서작산염([Bim]Ac)리자액체，통과1H-NMR、13C-NMR화IR대기결구진행료표정。재303.15 K화상압하，채용U형진탕관밀도계측정료[Bim]Ac+갑순、을순화정병순이원체계적밀도，용오씨점도계측정료체계적점도。유밀도수거계산득도료체계적초액마이체적(VE)、표관마이체적(Vfi )、편마이체적(V m,i )화초액편마이체적( EV m,i )，유점도수거획득료체계적혼합점도변화(?h)，병채용Redlich-Kister방정분별관련료VE、?h여조성적관계。결과표명：상술체계적VE재전농도범위내균위부치，차재[Bim]Ac마이분수x1=0.3~0.4처출현겁소치；Δη재전농도범위야균위부치，재x1=0.4~0.5처출현겁소치；[Bim]Ac+순체계VE혹?h적겁치대소위：[Bim]Ac+갑순<[Bim]Ac+을순<[Bim]Ac+정병순，표명[Bim]Ac여순지간적상호작용수착순겁성적증가이증대。Redlich-Kister방정능교호지관련상술체계VE、?h여조성적관계。
1-Butylimidazolium acetate ([Bim]Ac) ionic liquid was synthesized, and the structure was characterized by1H-NMR,13C-NMR, and IR spectroscopy. Density and viscosity of [Bim]Ac+methanol, [Bim]Ac+ethanol, and [Bim]Ac+1-propanol binary mixtures were measured over an entire range of molar fraction at T=303.15 K under atmospheric pressure using a vibrating U-shaped sample tube densimeter and Ubbelohde Suspended-level viscometer, respectively. Excess molar volumes (VE), apparent molar volumes (Vfi), partial molar volumes (Vm,i), and excess partial molar volumes (VEm,i) of the studied systems were calculated with the density data. Viscosity deviations (Δη) of the studied systems were obtained from the viscosity data.VE andΔηwere fitted by Redlich-Kister equation, respectively. The results show that theVE values of the three studied systems are negative over the entire composition range, and a minimum value is reached with mole fraction of [Bim]Acx1=0.3~0.4. TheΔηvalues of the above-mentioned systems are also negative over the entire composition range, and a minimum value is reached withx1=0.4~0.5. TheVE orΔη values of the studied systems follow an order of [Bim]Ac+methanol < [Bim]Ac+ethanol < [Bim]Ac+1-propanol, which indicates that the interaction between [Bim]Ac and alkanol increases with the increase of alkanol polarity. TheVE andΔη values can be well fitted with Redlich-Kister equation.