Synthesis Of Noval Surfactant-based Ionic Liquids And Their Application In Control Preparation Of Nanomaterials

With the rapid development of social economy, a lot of functional materials such as hydroxyapatite (HA), metal organic frameworks (MOFs) have received extensive attention due to their widespread use. Ionic liquid has been widely applied in electrochemistry, organic synthesis, catalysis, separation, and other fields, duo to its non-volatile, non-flammablility, high conductivity, small vapor pressure, stably and good solubility for a lot of inorganic salts and organic compounds.In this paper, three novel surfactant ionic liquids were synthesized and characterized and their properties were studied, then HA nano wires, HA nanorods, HA hollow nanospheres and Ca-metal organic frameworks (MOFs) were obtained by using it as template instead of the traditional anion surfactants. The details are as follows:Firstly, three surfactant-based ionic liquid(SBIL) (4[C4N]AOT,4[C4N]DS and 4[C4N]AES) have been synthesized through ion exchange method using tetrabutyl ammonium chloride and traditional anion surfactants (AOT, SDS and AES)as raw materials, they were characterized by nuclear magnetic resonance instrument and mass spectrometer. Their aggregation behavior in solutions was studied by electrical conductivity measurements, the critical micelle conentration (cmc) values of the three SBILs are 0.0012 mol/L,0.0024 mol/Land 0.0023 mol/L, respectively. All these cmc values are lower than the values of the corresponding traditional anion surfactants. According to the results of dynamic light scattering (DLS) and transmission electron microscopy (SEM), all of them can assemble to form spherical micelles with diameters of 1-3 nm. Furthermore, HA nanowires and nanorods can be controlled synthesized by hydrothermal method using 4[C4N]DS as modifier.Secondly, hollow nanoplate-assembled sphere-like HA have been obtained by gaseous diffusion method using ionic liquid 4[C4N]AES as modifier. During the process, the value of pH of aqueous solution was adjusted by the diffusion and dissolution of ammonia. The transformation of the morphologies and structure were investigated by SEM and XRD during the formation process. Based on the synthesis of spherical HA, a new strategy has been developed for the removal of heavy metal ions such as Pb2+, Cu2+, and Zn2+. The experimental results indicate that nanoplate-assembled sphere-like HA has the best capture selectivity for Pb2+ ion. The maximum removal ratio of Pb2+ ion was 99.9%. At the same time the different concentrations of HA and pH on the absorption of Cu2+were studied, with the increase of the concentration of HA and the pH of solution, the absorption rate of Cu2+ increased.MOFs have attracted considerable attention over the last decade due to their facile preparation, tunable pore metrics and the ease of functionalisation of their internal surfaces, such that designer frameworks with exceptional properties for application in gas-storage, separation of small molecules, heterogeneous catalysis and drug delivery are becoming commonplace. So nanorods and nanospheres of Ca-MOFs have been successfully produced by hydrothermal method using 4[C4N]DS as modifier. For drug delivery of nimesulide, the Ca-MOFs, displays hierarchical structure and large surface-area-to-volume ratio to increase the drug payload. Nimesulide release from Ca-MOFs was efficiently controlled to enhance the pesticide effect.