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.
Results
Showing 1 to 12 of 12 for “"Gas Separation Membrane"”.
-
Layered graphene nanomaterials for gas separation membrane applications
Membrane-based gas separation technologies have attracted great interest because of their potential to improve separation performance, lower energy and capital costs, reduce the equipment size, minimize the environmental footprint, and provide easier operation. The performance of gas separation …
-
Synthesis and Characterization of Novel Polyimide Gas Separation Membrane Material Systems
… thermogravimetric analysis (TGA) and selective gas permeation methods, as well as other techniques. The O2 permeation and O2/N2 selectivity values obtained for materials prepared in this thesis are discussed in relation to the concept of an "upper bound", as defined in the literature concerning …
-
Post-Synthetic Chemical and Morphological Modifications of Polymer Membranes for Gas Separations
… became potential candidates for next-generation gas separation membrane materials. Over the past two decades, this potential has sparked extensive membrane material development research, resulting in a library of microporous polymers. However, despite these significant advancements in developing …
-
Phase Control and Transformations of Azole-Based Metal Organic Framework Composites
… with applications in different fields such as gas separation. In this dissertation, we explore the phase control and dynamics of zinc-azolebased MOFs in crystalline, liquid, and glassy states. We first study ZIF-7 phase control using mechanochemical synthesis. Ammonium nitrate was found to be a …
-
Synthesis and Characterization of High Performance Polymers for Gas Separation Membranes
… polybenzoxazoles and polybenzimidazoles for gas separation applications. An abundance of monomers and novel polymers were synthesized and fabricated into membranes. Thermally rearranged polybenzoxazoles and their precursor polyimides were systematically studied with regard to size of pendant …
-
High Permeability/High Diffusivity Mixed Matrix Membranes For Gas Separations
The vast majority of commercial gas separation membrane systems are polymeric because of processing feasibility and cost. However, polymeric membranes designed for gas separations have been known to have a trade-off between permeability and selectivity as shown in Robeson's upper bound curves. The …
-
Synthesis and Characterization of Toughened Thermally Rearranged Polymers, Poly(2,6-Dimethylphenylene-oxide) Based Copolymers and Polymer Blends for Gas Separation Membranes
… rearranged (TR) polymers have outstanding gas separation properties, but are limited in their industrial application due to being mechanically brittle. A series of low volume fraction of a poly(arylene ether sulfone) (PAES) block was introduced into the TR precursor polyhydroxyimide (PI) …
-
Synthesis and Characterization of High Performance Polymers for Gas Separation and Water Purification Membranes and as Interfacial Agents for Thermplastic Carbon Fiber Composites
… specifically polybenzimidazoles (PBIs) for gas separation applications and polyimides (PI) for water purification and as interfacial agents for thermoplastic carbon fiber composites. Two methods for improving the gas transport properties (for H2/CO2 separation) of a tetraaminodiphenylsulfone …
-
Melt Processable Poly(acrylonitrile)-based Precursors for Carbon Fiber Production and Advanced Polymeric Membranes for Gas Separation and Water Electrolysis Applications
… greater than 1 hour. The modification of membranes to improve gas separation properties is of considerable interest. Crosslinking is one route to modify membranes, but the resulting effects on thin membranes have yet to be investigated to understand the impact of such modification at …
-
Fabrication and characterization of poly(amide-imides)/TiO₂ nanocomposite gas separation membranes
Nanosized Ti0₂ rich domains were generated in-situ within poly(amide-imide) (PAl) and 6F-poly(amide-imide) (6FPAl) by a sol-gel process. The composite films showed a high optical transparency. The morphology of the Ti0₂ rich domains was observed by transmission electron microscopy (TEM). The Ti0₂ …
-
Synthesis and Characterization of Novel Polybenzimidazoles and Post-modifications for Membrane Separation Applications
… application areas including proton exchange membrane fuel cells, gas separation membranes, reverse osmosis and nanofiltration, and high performance coatings. The following studies are focused on the synthesis, characterization and related properties of polybenzimidazoles and polybenzimidazole …
-
Engineering nanoporous materials for application in gas separation membranes
… and nanostructured surfaces for applications in gas separation membranes. Tunable methods have been developed to create inorganic hydroxide nanostructures on zeolite surfaces, and used to control the inorganic/polymer interfacial morphology in zeolite/polymer composite membranes. The study of the …