Dynamics of Membrane Structure Formation in Quenched Polymer Solutions PDF Download

Author: Benjamin Fredrick Barton
Publisher:
ISBN:
Category :
Languages : en
Pages : 304

View

Book Description

Author: Naser Tavajohi
Publisher: Elsevier
ISBN: 0323956297
Category : Science
Languages : en
Pages : 462

View

Book Description
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

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 860

View

Book Description

Author: Matthew Walter Liberatore
Publisher:
ISBN:
Category :
Languages : en
Pages : 272

View

Book Description

Author: H. Lonsdale
Publisher: Springer Science & Business Media
ISBN: 1468420046
Category : Technology & Engineering
Languages : en
Pages : 496

View

Book Description
Th i s book had its orl gl n in the sympos i urn on "Polymers for Desalination" sponsored by the Division of Polymer Chemistry of the American Chemical Society and held in September, 1971 in Wash ington D. C. at the 162nd national meeting of the Society. However, the book is not simply the proceedings of that symposium. A num ber of additional papers were contributed by other workers in the field, and the original papers presented at the symposium have, for the most part, been expanded. The book thus represents a broad cross section of membrane research and development activities in the United States and abroad within the field of reverse osmosis. The purposes of the book are to bring attention to important new developments in this field, to suggest what the next generation of reverse osmosis equipment may look like, and to indicate where fur ther research and development are needed. The vast majority of the papers collected here represent work supported by the Office of Saline Water of the United States Department of the Interior, and the emphasis here is clearly on the application of the reverse os mosis process to water purification. However, many of the concepts, methods, and conclusions are expected to be useful in other areas of membrane science and technology.

Author: Anthony J. McHugh
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 3

View

Book Description

Author:
Publisher: Steinkopff
ISBN: 9783662157046
Category : Technology & Engineering
Languages : en
Pages : 293

View

Book Description
The International Symposium on Colloid and Polymer Science was held at Nagoya Institute of Technology, Nagoya, Japan, in October 1996. The program covered both the fundamental aspects as well as technological applications of micelles, microemulsions, monolayers, and biocolloids. Special emphasis was placed on formation and dynamics of self-organized structures, including technical developments, applications, general theory, and results of investigations.

Author: Enrico Drioli
Publisher: Elsevier
ISBN: 0444637966
Category : Science
Languages : en
Pages : 1709

View

Book Description
Comprehensive Membrane Science and Engineering, Second Edition, Four Volume Set is an interdisciplinary and innovative reference work on membrane science and technology. Written by leading researchers and industry professionals from a range of backgrounds, chapters elaborate on recent and future developments in the field of membrane science and explore how the field has advanced since the previous edition published in 2010. Chapters are written by academics and practitioners across a variety of fields, including chemistry, chemical engineering, material science, physics, biology and food science. Each volume covers a wide spectrum of applications and advanced technologies, such as new membrane materials (e.g. thermally rearranged polymers, polymers of intrinsic microporosity and new hydrophobic fluoropolymer) and processes (e.g. reverse electrodialysis, membrane contractors, membrane crystallization, membrane condenser, membrane dryers and membrane emulsifiers) that have only recently proved their full potential for industrial application. This work covers the latest advances in membrane science, linking fundamental research with real-life practical applications using specially selected case studies of medium and large-scale membrane operations to demonstrate successes and failures with a look to future developments in the field. Contains comprehensive, cutting-edge coverage, helping readers understand the latest theory Offers readers a variety of perspectives on how membrane science and engineering research can be best applied in practice across a range of industries Provides the theory behind the limits, advantages, future developments and failure expectations of local membrane operations in emerging countries

Author: Michael Rosario Cervellere
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

View

Book Description
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.

Author: Gerard Caneba
Publisher: Springer Science & Business Media
ISBN: 3642030254
Category : Technology & Engineering
Languages : en
Pages : 318

View

Book Description
Providing insight on the free-radical retrograde-precipitation polymerization process, this volume examines the phenomenological aspects in comparison to other materials, such as nanoscale confinement behavior and nucleated hot spots.