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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 17 of 17 for “"membrane fabrication"”.
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Modelling and simulation of drying process for ceramic membrane fabrication
… green body of ceramic is crucial especially in membrane fabrication that has a multilayer structure to ensure the efficiency of its applications. Thus, every step of ceramic membrane preparation and fabrication needs careful control and monitoring to fulfil these aims. Drying is one of the main …
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Synthesis, Characterization, Membrane Fabrication and Gas Transport Behavior of Liquid Crystal Polymer Materials
… (LC) materials have been examined as potential membrane separation materials. The order present in the LC phases has measurable effects on solute sorption, diffusivity, permeability, and selectivity, and can thus be used to tune the transport and separation of different species. The current work …
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Application of the Vortex Fluid Device (VFD) in Polysulfone Synthesis and Ultra-filtration Membrane Fabrication for water treatment purposes
… to improve key properties of filtration membranes via controlling the fabrication process conditions as well as physical and/or chemical modification of the polymers used in membrane fabrication. The Vortex Fluid Device (VFD) is a newly invented platform which has found many applications …
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Exploring transport and phase behavior in nanoporous carbon materials
… a substantial impact on applications involving membrane fabrication, single-molecule detection, oil reservoir modeling, and drug delivery. While transport and phase behavior in larger nanopores (>50 nm) approach bulk or are well-described by continuum models, much less is known about much …
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Graphene supported hafnium oxide nanopores for DNA sensing
… transistors for localized detection, ultra-thin membrane fabrication using graphene, and the exploration of alternative nanopore materials for biosensing applications. In this work, the development of a new solid-state nanopore sensor consisting of hafnium oxide suspended by functionalized …
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Vertically-aligned carbon nanotube membranes for water desalination and ultrafiltration
… performance and comparatively low prices, membrane technology is widely applied in many fields such as medical science, environmental science and many more. Despite its benefits such as energy efficiency and high performance, they are susceptible to fouling. Such drawbacks encourage the …
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Simulations of polymeric membrane formation in 2D and 3D
… process makes most commercial polymeric membranes, which enjoy widespread use in water filtration and purification. In this work, a ternary Cahn-Hilliard formulation incorporating a Flory-Huggins homogeneous free energy function is used to model both initial diffusion and the …
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Surface modification of polymer membranes by self-organization
Water filtration processes employing polymer membranes have become increasingly important over the past forty years. Due to their high efficiency and modularity relative to conventional processes, membrane separations are among a suite of emerging water treatment technologies which will make …
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Development of in situ synthesis of silver polysulfone membrane for water separation
Water treatment using membrane filtration is one of the common methods that can generate higher amount of quality water in future. However, polymer blending method via ex-situ synthesis method shows some weaknesses on membrane modification such as membrane prone to fouling and hydrophobic. In this …
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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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Development of macroscopic nanoporous graphene membranes for gas separation
… For such applications, gas separation membranes are attractive because they offer relatively low energy costs but can be limited by low flow rates and low selectivities. Nanoporous graphene membranes have the potential to exceed the permeance and selectivity limits of existing gas …
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Nanoporous monolayer graphene membranes for water purification : from concept to realization
… foundation for a new class of highly permeable membranes for water purification and desalination. Though atomically thin, graphene exhibits both exceptional mechanical strength and imperviousness to atoms as small as helium. High-density, subnanometer pores within graphene have the potential for …
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Assessing graphene oxide for water desalination applications
… will play a role in improving the economics. The membranes used in today's reverse osmosis plants are made from polymers that are fragile, limited in the flux, and typically operate at 70% of their rated performance due to biofouling. Following the exciting proposition of using graphene as a …
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Characterization of polymeric membranes: sulfonated polysulfones
… for use as a reverse osmosis desalination membrane. In this work, an extensive of dense membranes made from sulfonated polysulfone having 0.2, 0.4, 0.5, 0.6, 0.8, and 1.0 degree of sulfonation is described. The degree of sulfonation (D.S.) was maintained during the membrane fabrication …
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Use of polymeric membranes for the treatment of oily wastewater: Modification using inorganic nanoparticles and optimization of filtration parameters
Polymeric membranes have proven to be an effective method for the treatment of contaminated waters. Many factors influence their performances including the operating parameters, fabrication process and conditions, and modifications using different additives. Introduced as additives, nanoparticles …
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Microporous polymeric membranes via melt processing
Novel ultraporous and microporous membranes from immiscible polymer blends were produced via melt processing and post-extrusion treatments. Polystyrene (PS)/polypropylene (PP) and poly(ethylene terephthalate) (PET)/polypropylene (PP) blend systems with different rheological properties were studied. …
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Synthesis and Characterization of Poly(arylene ether sulfone)s for Reverse Osmosis Water Purification and Gas Separation Membranes
… the salt rejection of water purification membranes and the selectivity of gas separation membranes. An abundance of monomers, telechelic oligomers, and novel polymers were synthesized for use as separation membranes. These materials were often imbued with crosslinking functionalities to …