The Study Of The Aggregation Of Fluorinated Ionic Liquid Surfactant In Ionic Liquid

The aggregates formed by fluorinated ionic liquid surfactant and ionic liquid solvent can provide the nanoscale reactor for material synthesis,chemical reaction and other processes.As a part of the project supported by the National Natural Science Foundation of China?No.21473050?,a series of fluorinated surface-active ionic liquids and ionic liquids as self-assembly media were synthesized.The structure and properties of the self-assembly aggregates constructed from these ILs have been studied.The major content of this work mainly has the following points:1.A series of surface-active ionic liquids with the anions of[C_nF_2n+1COO]^-?n=5,7?and the cations of⁺N?C₂H₅?₄?⁺N?C₄H₉?₄?⁺N?CH₃?₃C₂H₄OH and⁺N?CH₃?₃CH₂C₆H₅ were synthesized.In addition,a series of surface-active ionic liquids with the cations of[C_nH₄F_?2n-3?mim]⁺?n=6,8?and the anions of NO₃^-and DCN^-were also synthesized.The structures of these fluorinated surface active ionic liquids were characterized by NMR method.The physical and chemical properties of the ionic liquid such as thermal decomposition temperature and melting point/glass transition temperature were determined.2.Some self-assembly systems based on perfluorinated carboxylic acid surface active ionic liquids and ionic liquids solvent were constructed,and the critical micelle concentration of perfluorinated carboxylic acid ionic liquids in ILs media was studied by the surface tension and ¹⁹F NMR methods.The size distribution of the micelles was characterized by dynamic light scattering,small angle x-ray scattering and cryo-TEM methods.In addition,a ternary microemulsion system based on perfluorinated carboxylic acid ionic liquids+EAN+[P₄₄₄₁₄][Tf₂N]was constructed.3.The self-assembly systems based on 1,1,2,2-tetrahydroperfluoroalkyl imidazolium surface-active ionic liquid and ionic liquid solvents EOAN/EAN/[C₂mim]EtSO₄ was constructed.The aggregation behavior of such systems were studied by the surface tension method.The surface properties and the thermodynamic parameters of the formation process were calculated.In addition,the size distribution of the micelles was characterized by dynamic light scattering.