摘要
采用表面张力法测定了辛烷磺酸钠(SOS)/溴化1-癸基-3-甲基咪唑鎓([C_(10)mim]Br)以及SOS/溴化1-十四烷基-3-甲基咪唑鎓([C_(14)mim]Br)复配体系的表面活性,得到了临界胶束浓度(cmc)、平衡表面张力(γ_(cmc))、表面压(Π_(cmc))、饱和吸附量(Γ_(max))和气液界面吸附分子的最小截面积(A_(min))等参数。应用Rubingh正规溶液理论,计算了混合胶束的组成(X_(1)^|(m))、活度系数(f_(1)^(m)和f_(2)^(m))及分子相互作用参数(β^(m)),所研究的体系均表现出了强协同增效作用,与[C_(10)mim]Br相比,SOS与[C_(14)mim]Br间的相互作用更强。热力学参数的计算结果也表明了混合胶束是自发形成的,且为热力学稳定体系。利用分光光度法测定了体系的浊度,结合目视观察与吸光度数值绘制了各体系的相图,SOS与[C_(10)mim]Br和[C_(14)mim]Br的复配体系均存在3个浓度区,即低均相溶液区、两相区和高均相溶液区。
Two mixed systems consisting of an anionic surfactant and a cationic surface-active ionic liquid were studied.The mixture of sodium octanesulfonate(SOS)and 1-decyl-3-methylimidazolium bromide([C_(10)mim]Br),and the mixture of SOS and 1-tetradecyl-3-methylimidazolium bromide([C_(14)mim]Br),were both investigated using surface tension measurement.The parameters,such as critical micelle concentration(cmc),surface tension at cmc(γ_(cmc)),surface pressure at cmc(Π_(cmc)),maximum surface excess(Γ_(max))and minimum area per molecule(A_(min)),were obtained.The mixed micellar parameters including micellar mole fraction(X_(1)^(m)),micellar interaction parameters(β^(m))and activity coefficients(f_(1)^(m)and f_(2)^(m))were calculated by applying Rubingh’s regular solution theory.The calculated parameters confirmed that there were strong synergy in all these mixed systems,and the interaction of SOS with[C_(14)mim]Br was stronger than that with[C_(10)mim]Br.Thermodynamic parameters for mixed monolayers and mixed micelles were calculated and discussed,which indicated that the mixed micelles were spontaneously formed and were thermodynamically stable systems.Turbidity measurement was conducted using spectrophotometry.The phase diagrams were plotted for each system based on visual observations and absorbance values.The mixed systems of SOS/[C_(10)mim]Br and SOS/[C_(14)mim]Br all exhibited three concentration regions:a low-concentration homogeneous solution region,a two-phase region,and a high-concentration homogeneous solution region.
作者
赵学艳
黄静宜
肖瑞杰
曹桂荣
Xueyan Zhao;Jingyi Huang;Ruijie Xiao;Guirong Cao(Institute of Disaster Prevention,Sanhe,Hebei 065201,China;Hebei Key Laboratory of Resource and Environmental Disaster Mechanism and Risk Monitoring,Sanhe,Hebei 065201,China)
出处
《日用化学工业（中英文）》
CAS
北大核心
2024年第8期887-894,共8页
China Surfactant Detergent & Cosmetics
基金
廊坊市科技局科学技术研究与发展计划项目(2022013089)
大学生创新创业训练计划项目(X202411775023)。
关键词
表面活性离子液体
混合胶束
聚集行为
协同作用
surface-active ionic liquid
mixed micelle
aggregation behavior
synergism
