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This book provides an application-oriented approach for pH responsive membranes and types of stimuli-responsive membranes and their applications in the biomedical field including initial development and recent use. It explains types, modes, and modification methods of membranes, along with membrane usage in applications such as drug delivery, hemodialysis, chemical sensing, and so forth. pH Responsive Membranes: Biomedical Applications explores recent research carried out in the area as well as the future outlook, and provides deeper insight for readers on the subject, ranging from the basics to advanced levels on the topic. Features Describes preparation, characterization, and applications of pH responsive membranes in biomedical applications Introduces theoretical understanding of pH responsiveness Covers development of advanced techniques regarding pH responsive membranes Provides insight into development of new materials and membranes Discusses advancements in drug delivery, hemodialysis, antibodies and enzyme production, chemical sensing, and selective ionic transport using pH responsive membranes This book is aimed at graduate students and researchers involved in membrane and chemical engineering/polymer exploration, and medical researchers.
This book provides an application-oriented approach for pH responsive membranes and types of stimuli-responsive membranes and their applications in the biomedical field including initial development and recent use. It explains types, modes, and modification methods of membranes, along with membrane usage in applications such as drug delivery, hemodialysis, chemical sensing, and so forth. pH Responsive Membranes: Biomedical Applications explores recent research carried out in the area as well as the future outlook, and provides deeper insight for readers on the subject, ranging from the basics to advanced levels on the topic. Features Describes preparation, characterization, and applications of pH responsive membranes in biomedical applications Introduces theoretical understanding of pH responsiveness Covers development of advanced techniques regarding pH responsive membranes Provides insight into development of new materials and membranes Discusses advancements in drug delivery, hemodialysis, antibodies and enzyme production, chemical sensing, and selective ionic transport using pH responsive membranes This book is aimed at graduate students and researchers involved in membrane and chemical engineering/polymer exploration, and medical researchers.
Stimuli Responsive Polymeric Membranes: Smart Polymeric Membranes explains the fundamentals and advances in topics relating to the field of membrane science. It elaborately explains concepts relating to stimuli responsive membranes, with special importance given down to minute details. Material selection, preparation, characterization and applications of various stimuli responsive membranes are extensively addressed, and their relevance (including examples) is included. The book covers history and development, merits and demerits, mechanisms of transport and fouling, applicability of membranes to various diverse areas, and preparation and characterization techniques of membranes. Next, the concept of fouling and its remedial actions is discussed. Finally, promising fields of research in the membrane science and future perspectives of membrane science field are explored. Provides basic and advanced knowledge of smart membranes, considering their morphological, physicochemical and separation characteristics Written in a clear and lucid style, keeping a diverse audience in mind Based on the state-of-art research of the authors
The development of new multifunctional membranes and materials which respond to external stimuli, such as pH, temperature, light, biochemicals or magnetic or electrical signals, represents new approaches to separations, reactions, or recognitions. With multiple cooperative functions, responsive membranes and materials have applications which range from biopharmaceutical, to drug delivery systems to water treatment. This book covers recent advances in the generation and application of responsive materials and includes: Development and design of responsive membranes and materials Carbon nanotube membranes Tunable separations, reactions and nanoparticle synthesis Responsive membranes for water treatment Pore-filled membranes for drug release Biologically-inspired responsive materials and hydrogels Biomimetic polymer gels Responsive Membranes and Materials provides a cutting-edge resource for researchers and scientists in membrane science and technology, as well as specialists in separations, biomaterials, bionanotechnology, drug delivery, polymers, and functional materials.
Smart Polymers and Their Applications, Second Edition presents an up-to-date resource of information on the synthesis and properties of different types of smart polymers, including temperature, pH, electro, magnetic and photo-responsive polymers, amongst others. It is an ideal introduction to this field, as well as a review of the latest research in this area. Shape memory polymers, smart polymer hydrogels, and self-healing polymer systems are also explored. In addition, a very strong focus on applications of smart polymers is included for tissue engineering, smart polymer nanocarriers for drug delivery, and the use of smart polymers in medical devices. Additionally, the book covers the use of smart polymers for textile applications, packaging, energy storage, optical data storage, environmental protection, and more. This book is an ideal, technical resource for chemists, chemical engineers, materials scientists, mechanical engineers and other professionals in a range of industries. - Includes a significant number of new chapters on smart polymer materials development, as well as new applications development in energy storage, sensors and devices, and environmental protection - Provides a multidisciplinary approach to the development of responsive polymers, approaching the subject by the different types of polymer (e.g. temperature-responsive) and its range of applications
Advanced Nanomaterials for Membrane Synthesis and Its Applications provides the academic and industrial communities the most up-to-date information on the latest trends in membrane nanomaterials and membrane nanotechnology used in wastewater treatment, environmental technology and energy. The rapid advances in nanomaterials and nanotechnology development over the past decade have resulted in significant growth of the membrane business for various industrial processes, particularly in nanotechnology-based membrane processes. While membrane technology is increasingly being used for liquid and gas separations, it has great potential in a variety of additional applications. As the worldwide academic community has a strong interest in advanced membrane processes, particularly membrane nanotechnology for specific separations, this book provides a timely update on the topic. - Presents a unique focus on the use of advanced nanomaterials in membrane fabrication/modification, and in the description of membrane nanotechnologies, such as nanofiltration, thin film nanocomposites and nanofibers for various applications - Describes next generation membranes, providing first resource details on the development and commercialization stages of these new membranes - Represents the state-of-the-art on the use of nanomaterials in membrane science
Preparation of some smart PAm-ZTS pH-responsive membranes, via reactions between ZTS and PAm under different conditions, was conducted for testing pressure-driven reverse osmosis membranes (PDROMs) in active rejection of Ce4+, Pr3+, Sm3+, Gd3+, Dy3+, and Ho3+ ionic lanthanide species in their 3+ and 4+ states. Recent theoretical models to designate the membrane operations were mathematically itemized, after selective characterization of the PDROMs. The pH scale response of the membrane was confirmed using static adsorption and hydraulic pervasion result estimations. The flux across the PAm-ZTS membrane decreased with the lowering pH value, with drastic decreases between pH 4 and 7, and was both reversible and durable with pH shifts between ~3 and ~8. At lower pH 3, the individual pores were in a closed-state due to the prolonged structure of the amide chains on the porous surfaces. In contrast, at pH 8, the higher pH value, the membrane pores were in an open-state format, because of the collapsed structures of the amide chains. This grants a clear possible approach for manufacturing some pH-responsive composite membranes and inspires further design for their stimuli-responsive actions by incorporating molecularly designed macromolecules, synthesized by controlled polymerization.
“Smart Membrane Materials and Systems: From Flat Membranes to Microcapsule Membranes" comprehensively and systematically treats modern understanding of smart or intelligent membranes with environmental stimuli-responsive functions. The contents range from flat membranes to microcapsule membranes with various response properties, such as thermo-response, pH-response, glucose-response, molecular-recognition, and dual-/multi-stimuli-response. While chapters may be read as stand-alone, together they clearly describe cover design concepts, fabrication strategies and methods, microstructures and performances of smart membranes. Vivid schematics and illustrations throughout the book enhance accessibility to the theory and technologies. The book is intended for researchers and postgraduate students in membrane science and technology, separations and controlled-release. Dr. Liang-Yin Chu is a professor at the School of Chemical Engineering, Sichuan University, China. He is a Distinguished Young Scholar of the National Natural Science Foundation of China and a Distinguished Professor of "Chang Jiang Scholars Program" of the Ministry of Education of China.
We report the fabrication of microporous thin film membranes with two-dimensionally arranged submicron pores whose size can be varied by changing pH of aqueous medium. A solution containing poly(2-vinylpyridine) partially quaternized with 1,4-dilodobutane (qP2VP) and unreacted 1,4-diodobutane (DIB) was used for the formation and deposition of the membranes on solid substrates. The membranes were spin-coated on to solid substrates in a controlled humid environment. The presence of water vapor in air was found to be a necessary condition for the pore formation. We studied the influence of relative humidity on the membrane morphology and proposed a mechanism of pore formation. Cross-linking the qP2VP membranes with DIB made them insoluble (stable) in organic solvents and acidic water. The cross-linked membranes demonstrated pH-dependent swelling, which had a strong influence on the pore size.
The efficient and safe delivery of complex biological agents offers great potential for the challenges of our time. Polymers offer considerable advantages in this regard, not only because of their low risk for immunogenic reactions, their comparatively inexpensive large-scale production and their long shelf life. The biological properties of organisms, organs, tissues and cells determine the design of safe and efficient delivery systems and should be considered as inspiration for new attempts to create effective materials. In addition to the balance between hydrophobicity and hydrophilicity, the degree of charge of a nanocarrier is also critical for efficient delivery and overcoming the endosome. Cationic charges do not only enhance cellular uptake but can also mediate a crossing of the endosomal barrier due to membrane interactions. The introduction of hydrophobic or even lipophilic components can further significantly increase membrane interactions. Besides the interaction with the cell membrane, it is important to consider that both the degree of charge and the hydrophobic-hydrophilic balance also affect the packaging and protection of sensitive biological cargo such as genetic material. However, cationic charges and hydrophobic components introduce some disadvantages, as electrostatic and hydrophobic interactions may disrupt the integrity of other cellular membranes, triggering toxic effects. Fine adjustment of the degree of charge and the hydrophobic-hydrophilic balance offer the possibility of balancing the requirements for a safe, yet efficient delivery process. In the present dissertation, various polymer systems with adjustable charge density and hydrophobic-hydrophilic balance were investigated with respect to their delivery efficiencies. A particular focus was set on the key step in delivery, the endosomal release.