Phase Field Modeling Of The Polymer Membrane Formation Process For Micro And Ultra Filtration
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Phase Field Modeling Of The Polymer Membrane Formation Process For Micro And Ultra Filtration
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Author : Michael Rosario Cervellere
language : en
Publisher:
Release Date : 2021
Phase Field Modeling Of The Polymer Membrane Formation Process For Micro And Ultra Filtration written by Michael Rosario Cervellere and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Porous polymer membrane filters are widely used in separation and filtration process. Micro- and ultra-filtration membranes are commonly used in biopharmaceutical applications such as filtering viruses and separating proteins from a carrier solution. The formation of these membrane filters via phase inversion is a complex and interconnected process where varying casting conditions can have a wide variety of effects on the final membrane morphol- ogy. Tailoring membrane filters for specific performance characteristics is a tedious and time consuming process. The time and length scales of membrane formation make it extremely difficult to experimentally observe membrane formation. Modeling the membrane formation process allows one to slow down time and closely observe the formation of complex pore net- works. This allows new understanding and visual representations of the effects of different casting conditions and the resulting pore networks that form. This dissertation presents two separate models for two different membrane formation processes - thermally induced phase separation (TIPS) and non-solvent induced phase sepa- ration (NIPS). The Phase-Field method is employed to model the mesoscopic morphological structures that emerge during membrane formation. The Cahn-Hilliard equation is used to capture the diffusive nature of membrane formation and the Flory-Huggins free energy of mixing describes the thermodynamic equilibriums of the polymer solutions. Large-scale two- and three-dimensional simulations are used for capturing the resulting pore morphology under various casting conditions. The model for TIPS evaluated different casting conditions for the membrane forming system PVDF/DPC (polyvinylidene fluoride/diphenyl carbonate). The effects of casting surface temperature, thermal conductivity, quench rate, and polymer concentration were in- vestigated. Isotropic thermal quenches were used to analyzed pore size and interconnectivity while varying the quench rate and polymer concentration. Anisotropic thermal quenches in which a constant temperature cooling surface is imposed at the top surface were used to an-alyze the pore size and formation of a dense pore region near the casting surface. Different polymer concentrations, casting surface temperatures, and polymer thermal conductivities were used to characterize their effects on pore morphology. The formation of a dense pore region occurs near the top surface and the thickness of this dense pore region is dependent on the previous mentioned casting conditions. The model for NIPS evaluated the effects of coagulation bath composition and polymer concentration on final membrane morphology for PES/NMP/Water (polyethersulfone/n- methyl-2-pyrrolidone/water). These simulations were then compared to handcast mem- branes of a similar membrane forming system for comparison the simulated structures. The NIPS model evaluated coagulation bath composition and polymer concentration and the resulting morphologies. Two and three dimensional simulations were used to look at cross section and top surface morphology respectively. The concentration of NMP in the co- agulation bath was varied to verify the predictive capabilities of the model. The resulting simulations of cross sections and top surfaces had good agreement with handcast membranes when NMP is added to the coagulation bath.
Polymeric Membrane Formation By Phase Inversion
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Author : Naser Tavajohi
language : en
Publisher: Elsevier
Release Date : 2024-01-01
Polymeric Membrane Formation By Phase Inversion written by Naser Tavajohi and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-01-01 with Science categories.
Polymeric Membrane Formation by Phase Inversion brings together for the first time analysis of all the four main phase inversion techniques. Effective parameters in each technique are covered together with the methodologies needed to prepare advanced membranes for specific separations in both liquid and gas phases. Roll-to-roll casting, spinning hollow fiber, and electrospinning nanofibers are presented, along with an analysis of the impact of solvent toxicity, membrane production, and the source of raw materials on the environment. Describing a road map for designing different morphological characteristics to prepare specific membranes for special applications, the merits and disadvantages of each method are thoroughly explored and outlined along with the sustainability, scalability and economic perspectives of membrane formation. Providing easy reference for academic and industry professionals working in membrane engineering this is an essential resource.
Polymeric Membranes For Water Purification And Gas Separation
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Author : Rasel Das
language : en
Publisher: Materials Research Forum LLC
Release Date : 2021-11-25
Polymeric Membranes For Water Purification And Gas Separation written by Rasel Das and has been published by Materials Research Forum LLC this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-25 with Technology & Engineering categories.
Various organic and synthetic polymers are important materials for the removal of organic and inorganic pollutants from wastewater and the separation of gases. The book discusses various types of membranes for microfiltration, ultrafiltration, nanofiltration, reverse osmosis, forward osmosis etc. A number of nanomaterials are available for the modification of polymeric membranes. Keywords: Polymeric Membrane, Water Purification, Water Softening, Water Desalination, Gas Separation, Osmosis Membranes, Microfiltration, Ultrafiltration, Nanofiltration, Carbon Nanotube, Nanosheets, MOFs, Porous Organic Cages, Titanium Dioxide, Zinc Oxide, Mesoporous Silica Nanoparticles, O2/N2 Separation, CO2/CH4 Separation, H2/N2 Separation.
Membrane Filtration
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Author : Greg Foley
language : en
Publisher: Cambridge University Press
Release Date : 2013-07-04
Membrane Filtration written by Greg Foley and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-07-04 with Technology & Engineering categories.
Focusing on the application of membranes in an engineering context, this hands-on computational guide makes previously challenging problems routine. It formulates problems as systems of equations solved with MATLAB, encouraging active learning through worked examples and end-of-chapter problems. The detailed treatments of dead-end filtration include novel approaches to constant rate filtration and filtration with a centrifugal pump. The discussion of crossflow microfiltration includes the use of kinetic and force balance models. Comprehensive coverage of ultrafiltration and diafiltration processes employs both limiting flux and osmotic pressure models. The effect of fluid viscosity on the mass transfer coefficient is explored in detail, the effects of incomplete rejection on the design and analysis of ultrafiltration and diafiltration are analysed, and quantitative treatments of reverse osmosis and nanofiltration process analysis and design are explored. Includes a chapter dedicated to the modelling of membrane fouling.
Modeling Study Of Thermally Induced Phase Separation Tips Membrane Formation Process
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Author : Dongmei Li
language : en
Publisher:
Release Date : 1999
Modeling Study Of Thermally Induced Phase Separation Tips Membrane Formation Process written by Dongmei Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Membranes (Technology) categories.
Mathematical Modeling And Experimental Study Of Thermodynamic And Transport Processes In The Formation Of Structured Polymer Membranes
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Author : Gerard Marcelino Tablada Caneba
language : en
Publisher:
Release Date : 1985
Mathematical Modeling And Experimental Study Of Thermodynamic And Transport Processes In The Formation Of Structured Polymer Membranes written by Gerard Marcelino Tablada Caneba and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.
Ultrafiltration Membranes From A Polymer Blend
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Author : Ingrid Maria Wienk
language : en
Publisher:
Release Date : 1993
Ultrafiltration Membranes From A Polymer Blend written by Ingrid Maria Wienk and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Modeling Of The Solid Liquid Thermally Induced Phase Separation Tips Membrane Formation Process
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Author : Dongmei Li
language : en
Publisher:
Release Date : 2003
Modeling Of The Solid Liquid Thermally Induced Phase Separation Tips Membrane Formation Process written by Dongmei Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Membranes (Technology) categories.
Polymeric Membrane Formation By Phase Inversion
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Author : Naser Tavajohi
language : en
Publisher: Elsevier
Release Date : 2024-03-19
Polymeric Membrane Formation By Phase Inversion written by Naser Tavajohi and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-03-19 with Science categories.
Polymeric Membrane Formation by Phase Inversion brings together for the first time analysis of all the four main phase inversion techniques. Effective parameters in each technique are covered together with the methodologies needed to prepare advanced membranes for specific separations in both liquid and gas phases. Roll-to-roll casting, spinning hollow fiber, and electrospinning nanofibers are presented, along with an analysis of the impact of solvent toxicity, membrane production, and the source of raw materials on the environment. Describing a road map for designing different morphological characteristics to prepare specific membranes for special applications, the merits and disadvantages of each method are thoroughly explored and outlined along with the sustainability, scalability and economic perspectives of membrane formation. Providing easy reference for academic and industry professionals working in membrane engineering this is an essential resource. Analyzes membrane formation by phase inversion and modeling Includes state-of-the-art membrane formation methods and related characterization techniques Discusses solvent toxicity and sustainability issues of membrane production
Microfiltration And Ultrafiltration
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Author : Zeman
language : en
Publisher: Routledge
Release Date : 2017-11-22
Microfiltration And Ultrafiltration written by Zeman and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-22 with Medical categories.
Integrates knowledge on microfiltration and ultrification, membrane chemistry, and characterization methods with the engineering and economic aspects of device performance, device and module design, processes, and applications. The text provides a discussion of membrane fundamentals and an analytical framework for designing and developing new filtrations systems for a broad range of technologically important functions. It offers information on membrane liquid precursors, fractal and stochastic pore space analysis, novel and advanced module designs, and original process design calculations.