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Synthesis of Imidazolium Ionic Liquids and Their Application in the Preparation of Functional Materials

Author: WuShuYing
Tutor: DingYunSheng
School: Hefei University of Technology
Course: Materials Science
Keywords: Imidazolium -based ionic liquids Soft template Ag / C nanocomposites Catalytic Microemulsion polymerization
CLC: O626.23
Type: Master's thesis
Year: 2009
Downloads: 274
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Abstract


This paper mainly discusses with long alkyl side chains (tetradecyl chain) imidazole-based ionic liquids in functional materials synthesis and preparation of the application. Synthesis of ionic liquids include traditional imidazole ionic liquid - tetradecyltrimethylammonium imidazolium salts ([C 14 mim] BF 4 and [C 14 mim] Br) and the new Gemini-type imidazole ionic liquid. Using Fourier transform infrared spectroscopy (FT-IR), 1H NMR ( 1 HNMR) to characterize them, confirming the resulting product is the target product. Imidazolyl ionic liquid synthetic lipophilic and hydrophilic alkyl chain of the imidazole ring, and similar to the conventional quaternary ammonium salt having the characteristics of a surfactant. So we tried to apply it as a surfactant in the preparation of functional materials. The synthetic ionic liquids as \Using XRD, TEM (HRTEM), SEM, X-ray energy dispersive spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy (Raman) on the structure and composition of the product were characterized by analysis. Investigated the reaction parameters, including reaction time, reaction temperature, the concentration of ionic liquids as well as reducing glucose AgNO 3 addition on the product structure. The results showed that the reaction parameters on the structure of the product has a great influence, and the structure of product from the ionic liquid control action, that is, by changing the ionic concentration of the liquid synthetic optional Ag / C nano cables and Ag / C hollow spheres. Finally examine this Nanoparticles butanol oxidation catalytic properties and found the synthesized Ag / C composites have some catalytic oxidation of butanol. In addition, Gemini ionic liquids will be used as an emulsifier in the emulsion polymerization of styrene. The polymerization kinetics and polymer latex particle size and its distribution were investigated to study the emulsifier concentration, the amount of monomer polymerization the polymerization rate and particle size of the latex particles and distribution. The results showed that, in a certain concentration range can be achieved without the styrene micro-emulsion emulsifier, the average particle diameter of emulsion particles of about 45nm, and with increasing concentration of emulsifier, and the resulting emulsion particle size reduced, the polymerization rate with an increasing trend, can achieve a higher monomer content (35%) of the micro-emulsion polymerization of styrene. Additionally, respectively, compared to [C 14 mim] Br and HTAB as emulsifier emulsion styrene performance. It was found that, in order to [C 14 mim] Br as emulsifier, the resulting latex particle mean size, the maximum rate of polymerization, emulsion stability is best, HTAB second, and with Gemini ionic liquids The resulting emulsion is emulsifier performance than the first two.

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Heterocyclic compounds > Containing five pairs or more different atoms of heterocyclic > Between the two nitrogen -mao ( imidazole) and its derivatives
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