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University of Sydney

1. Jiang, Haihui Joy. Structural Design of Ionic Liquids for Process Optimisation .

Degree: 2018, University of Sydney

Ionic liquids (ILs) are designer solvents with tuneable cationic and anionic structures. We propose structural factors that are key to realising the designer solvent promise of ILs. We highlight their potential for translation to new generations of low-cost and environmentally sustainable cation and anion motifs for large-scale applications. Starting from a comparison among primary and secondary ammonium ILs, the unusual liquid nanostructure of pyrrolidinium ILs explains its versatile solvent properties. In the context of biomass processing, we present a framework for the design of IL structure to minimize competition and to enhance driving forces for aromatic extraction. Choline amino-acid ILs and their water mixtures show great promise as low-cost biocompatible solvents. ILs as solvents have the rare ability to promote amphiphilic self-assembly of molecules, such as n-alkanols, that are not conventionally considered as amphiphilic surfactants in water. We investigate the structure of complex solutions using a combination of small-angle X-ray scattering (SAXS), small-angle neutron scattering (SANS), invariant analysis, and neutron diffraction combined with Empirical Potential Structural Refinement (EPSR) simulation technique. We rationalise how IL-supported self-assembly can be controlled over solute polarity, packing geometry and formulation. The design of ILs as solvents is not restricted to pure ionic species. We demonstrate new categories of ILs based on molecular complexation around metal cations. Non-ionic surfactants self-assemble in inorganic salts as they do in ILs or water, with predictable phase behaviours rationalised by the surfactant packing parameter. Further, we show mixtures of paramagnetic salts and low-volatile solvents as magnetic ionic liquids. Our structural understanding of ILs and their mixtures creates opportunities for formulating new types of nanomaterials and facilitates the design of future solvents for process optimisation.

Subjects/Keywords: amphiphilic; nanostructure; self-assembly; biomass; scattering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Jiang, H. J. (2018). Structural Design of Ionic Liquids for Process Optimisation . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/19001

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Jiang, Haihui Joy. “Structural Design of Ionic Liquids for Process Optimisation .” 2018. Thesis, University of Sydney. Accessed January 23, 2019. http://hdl.handle.net/2123/19001.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Jiang, Haihui Joy. “Structural Design of Ionic Liquids for Process Optimisation .” 2018. Web. 23 Jan 2019.

Vancouver:

Jiang HJ. Structural Design of Ionic Liquids for Process Optimisation . [Internet] [Thesis]. University of Sydney; 2018. [cited 2019 Jan 23]. Available from: http://hdl.handle.net/2123/19001.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jiang HJ. Structural Design of Ionic Liquids for Process Optimisation . [Thesis]. University of Sydney; 2018. Available from: http://hdl.handle.net/2123/19001

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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