Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Hybrid Membranes"”.
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Polyimide-Organosilicate Hybrid Materials: Part I: Effects of Annealing on Gas Transport Properties; Part II: Effects of CO2 Plasticization
… effects of annealing polyimide-organosilicate hybrid membranes on gas transport. In addition, the effects of carbon dioxide pressure on the gas transport of unannealed polyimide-organosilicate hybrid membranes were evaluated. The membranes in both studies consisted of sol-gel derived …
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Pressure Driven Desalination Utilizing Nanomaterials
… desalination. The first project is to prepare hybrid membranes with amyloid fibrils intercalated with graphene oxide sheets. The addition of protein amyloid fibrils expands the interlayer spacing between graphene oxide nanosheets and introduces additional functional groups in the diffusion …
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Polymeric and Polymer/Inorganic Composite Membranes for Proton Exchange Membrane Fuel Cells
Several types of novel proton exchange membranes which could be used for both direct methanol fuel cells (DMFCs) and hydrogen/air fuel cells were investigated in this work. One of the main challenges for DMFC membranes is high methanol crossover. Nafion, the current perfluorosulfonic acid copolymer …
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Porous Graded Materials Derived From Block Copolymer Self-Assembly For Water And Energy Applications
… It has been utilized to make ultrafiltration membranes for water treatment and selective separation. In the first part, further development on SNIPS polymeric membranes is discussed. In situ grazing incidence small-angle X-ray scattering (GISAXS) was employed to study the structure evolution …
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POLYELECTROLYTE NANOPARTICLE MEMBRANES AT WATER-WATER INTERFACES
… route to assemble functional, stimuli-responsive membranes. The aim of this thesis is to identify the membrane self-assembly mechanism of such systems. We study two PE/NP systems in a dextran/PEG ATPS and find very different growth behaviors. In one case, PE/NP membranes can grow continuously to …
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Development of novel catalysts coated non-fluorinated proton exchange membranes for water electrolysis
… of poly perfluorosulfonic acid (PFSA)-based membranes. These membranes offer high proton conductivity, exceptional chemical stability, and mechanical strength under vari-ous conditions, thanks to the strong C–F bonds in their molecular structure. However, PFSA mem-branes face several …
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Self-assembly of nanostructured amphiphiles onto surfaces: Design principles for substrate mediated biomedical applications
… new structures of composite lipid-polymer hybrid films that augment the functionality of drug-eluting substrates for substrate-mediated delivery applications. Concurrent self-assembly of lipids and polymers into the same membrane resulted in hybrid membranes showing peculiar phase behavior. …
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Silica-based nanocomposite membranes via the sol gel process of polyethoxysiloxane within a sulfonated poly(ether-ether-ketone) matrix: morphology and proton mobility
… with the preparation and characterization of hybrid organic/inorganic membranes obtained from solutions, where the organic phase is the sulfonated poly(ether ether ketone) (SPEEK) and the inorganic phase are silica nanoparticles obtained from the in situ "water free" sol-gel process of …
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Synthesis and characterisation of proton conducting membranes for direct methanol fuel cell (DMFC) applications
… the high methanol permeability achieved by these membranes, they are very expensive and contribute greatly to theoverall cost of fuel cell set up. The high cost of the DMFC components is one of the main issues preventing its commercialization. The main objective of this study was thus to produce …
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Characterization of the nano- and meso-scale hierarchic assembly in biomimetic membranes and living systems
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01