Download or read book Microfluidic Approaches to the Synthesis of Complex Polymeric Particles written by Dhananjay Dendukuri and published by . This book was released on 2007 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) A third approach to synthesizing particles uses elastomeric phase masks to build all-PDMS devices. Coherent laser light passing through a phase mask generates a complex 3D distribution of intensity that selectively exposes certain regions while leaving out others. This results in the formation of 3-D structures whose features can be tuned at the micron scale and below. We have attempted the formation of 3-D structures in hydrogel polymers which could have important implications in the field of tissue engineering. Finally, we have developed a simple model of the oxygen inhibited polymerization that occurs in flow lithography. This model is able to qualitatively predict the presence of a thin, uncrosslinked layer of oligomer close to the walls of the PDMS device. This layer is critical to our ability to flow out particles in flow lithography. This thesis demonstrates that microfluidics is indeed a viable and promising route to the synthesis of complex polymeric particles and structures.
Download or read book Microfluidic Reactors for Polymer Particles written by Eugenia Kumacheva and published by John Wiley & Sons. This book was released on 2011-02-14 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: The manipulation of fluids in channels with dimensions in the range from tens to hundreds of micrometers – microfluidics – has recently emerged as a new field of science and technology. Microfluidics has applications spanning analytical chemistry, organic and inorganic synthesis, cell biology, optics and information technology. One particularly promising application is the microfluidic synthesis of polymer particles with precisely controlled dimensions, and a variety of shapes, morphologies and compositions. Written as a comprehensive introduction for scientists and engineers working in microfabrication and microfluidics, Microfluidic Reactors for Polymer Particles covers topics such as: Applications and methods of generation of polymer particles Physics of microfluidic emulsification Formation of droplets in microfluidic systems High-throughput microfluidic systems for formation of droplets Microfluidic production of polymer particles and hydrogel particles Polymer capsules Synthesis of polymer particles with non-conventional shapes This book is intended for a broad audience, including students, researchers and engineers in industry, with interests in physics, chemistry, materials science, engineering or biotechnology.
Download or read book Polymer Particles written by Masayoshi Okubo and published by Springer Science & Business Media. This book was released on 2005-02-10 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this special volume on polymer particles, recent trends and developments in the synthesis of nano- to micron-sized polymer particles by radical polymerization (Emulsion, Miniemulsion, Microemulsion, and Dispersion Polymerizations) of vinyl monomers in environmentally friendly heterogeneous aqueous and supercritical carbon dioxide fluid media are reviewed by prominent worldwide researchers. In addition to the important challenges and possibilities with regards to design and preparation of functionalized polymer particles of controlled size, the topics described are of great current interest due to the increased awareness of environmental issues.
Download or read book Cell Microencapsulation written by Emmanuel C. Opara and published by Humana. This book was released on 2016-10-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a unique forum to review cell microencapsulation in a broad sense by exploring various cell types that have been encapsulated for different purposes, different approaches and devices used for microencapsulation, the biomaterials used in cell microencapsulation, the challenges to the technology, and the current status of its application in different clinical situations. This book is divided in five sections: Section I is an introductory part that discusses historical developments of the technology and its current challenges, as well as the various applications of cell microencapsulation; Section II discusses the main approaches and devices currently used in cell microencapsulation; Section III presents an overview of the various polymeric materials currently in use for cell microencapsulation and the enabling technologies to either monitor or enhance encapsulated cell function; Section IV gives specific examples of the methods used to encapsulate various cell types; and Section V provides an overview of the different clinical situations in which cell microencapsulation has been applied. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Thorough and practical, Cell Microencapsulation: Methods and Protocols is a valuable reference for researchers, engineers, clinicians, and other healthcare professionals, as well as food technologists who will find detailed descriptions of methods for the microencapsulation of specific cell types and their current of potential clinical and industrial applications. This volume also includes detailed information about the design and manufacture of different devices including large-scale production devices for use in cell microencapsulation.
Download or read book Microfluidic assisted Synthesis and Release Properties of Multi domain Polymer Microparticles Drug Carriers written by Ikram Ullah Khan and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characteristics and release properties of drug loaded microparticles depend upon material used and choice of production method. Conversely to most of the conventional ones, microfluidic methods give an edge by improving the control over droplet generation, size and size distribution. Capillary-based microfluidic devices were successfully used to obtain monodisperse drug(s) loaded microbeads, janus, core-shell and trojan particles using UV initiated free radical polymerization while keeping activity of active loaded molecules. These devices can be assembled in a short period of time and a slight change in design gives completely different microparticles morphologies. These particles were developed with the aim to address different issues experienced in oral drug delivery. For instance microbeads can be used to deliver NASIDs in a sustained release manner while janus particles can release two APIs with completely different properties (solubility, compatibility) also in a sustained release manner. Core-shell particles were designed to target colonic region of human intestine for dual drug delivery. Trojan particles were synthesized in a new semi-continuous microfluidic process, thus improving nanoparticles safety handling and release in simulated gastric fluid. Each system was fully characterized to insure batch to batch consistency and reproducibility. In general, the release of active ingredients was controlled by tuning the operating and material parameters like phases flow rates, nature and concentration of drug, (co)monomers, surfactant and crosslinker, pH of release media with the result of different particle morphologies, sizes and shapes or matrix crosslinking density.
Download or read book Nanotechnology for Microfluidics written by Xingyu Jiang and published by John Wiley & Sons. This book was released on 2020-09-08 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses on microfluidics with applications in nanotechnology. The first part summarizes the recent advances and achievements in the field of microfluidic technology, with emphasize on the the influence of nanotechnology. The second part introduces various applications of microfluidics in nanotechnology, such as drug delivery, tissue engineering and biomedical diagnosis.
Download or read book Microfluidics for Advanced Functional Polymeric Materials written by Liang-Yin Chu and published by John Wiley & Sons. This book was released on 2017-03-13 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and systematic treatment of our current understanding of the microfluidic technique and its advantages in the controllable fabrication of advanced functional polymeric materials. Introducing and summarizing recent advances and achievements in the field, the authors cover the design and fabrication of microfluidic devices, the fundamentals and strategies for controllable microfluidic generation of multiphase liquid systems, and the use of these liquid systems with an elaborate combination of their structures and compositions for generating novel polymer materials, such as microcapsules, microfibers, valves, and membranes. Clear diagrams and illustrations throughout the text make the relevant theory and technologies more readily accessible. The result is a specialist reference for materials scientists, organic, polymer and physical chemists, and chemical engineers.
Download or read book Microfluidics written by Yujun Song and published by John Wiley & Sons. This book was released on 2018-01-04 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book offering a global overview of fundamental microfluidics and the wide range of possible applications, for example, in chemistry, biology, and biomedical science. As such, it summarizes recent progress in microfluidics, including its origin and development, the theoretical fundamentals, and fabrication techniques for microfluidic devices. The book also comprehensively covers the fluid mechanics, physics and chemistry as well as applications in such different fields as detection and synthesis of inorganic and organic materials. A useful reference for non-specialists and a basic guideline for research scientists and technicians already active in this field or intending to work in microfluidics.
Download or read book Nanocomposite Materials written by Erich Kny and published by Trans Tech Publications Ltd. This book was released on 2009-04-16 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). Nanocomposite materials constitute a rapidly evolving field of science and technology, of which the first applications are already on the market and many more are expected to follow. The admixture of relatively low amounts of nanoparticles (these are, by definition, any morphology having at least one dimension in the nano-range, i.e. particles, fibres, plates) within a matrix of polymer, ceramic or metal has a dramatic increasing effect upon the resultant properties (volume, surface and functional properties). Unusual property combinations can be obtained; resulting in a new class of materials for almost every application.
Download or read book Controlling Particle Morphologies at Fluid Interfaces written by Shilpa Naidu Beesabathuni and published by . This book was released on 2014 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: The controlled generation of varying shaped particles is important for many applications: consumer goods, biomedical diagnostics, food processing, adsorbents and pharmaceuticals which can benefit from the availability of geometrically complex and chemically inhomogeneous particles. This thesis presents two approaches to spherical and non-spherical particle synthesis using macro and microfluidics. In the first approach, a droplet microfluidic technique is explored to fabricate spherical conducting polymer, polyaniline, particles with precise control over morphology and functionality. Microfluidics has recently emerged as an important alternate to the synthesis of complex particles. The conducting polymer, polyaniline, is widely used and known for its stability, high conductivity, and favorable redox properties. In this approach, monodisperse micron-sized polyaniline spherical particles were synthesized using two-phase droplet microfluidics from Aniline and Ammonium persulfate oxidative polymerization in an oil-based continuous phase. The morphology of the polymerized particles is porous in nature which can be used for encapsulation as well as controlled release applications. Encapsulation of an enzyme, glucose oxidase, was also performed using the technique to synthesize microspheres for glucose sensing. The polymer microspheres were characterized using SEM, UV-Vis and EDX to understand the relationship between their microstructure and stability. In the second approach, molten drop impact in a cooling aqueous medium to generate non-spherical particles was explored. Viscoelastic wax based materials are widely used in many applications and their performance and application depends on the particle morphology and size. The deformation of millimeter size molten wax drops as they impacted an immiscible liquid interface was investigated. Spherical molten wax drops impinged on a cooling water bath, then deformed and as a result of solidification were arrested into various shapes such as ellipsoids, mushrooms, spherulites and discs. The final morphology of the wax particles is governed by the interfacial, inertial, viscous and thermal effects, which can be studied over a range of Weber, Capillary, Reynolds and Stefan numbers. A simplified Stefan problem for a spherical drop was solved. The time required to initiate a phase transition at the interface of the molten wax and water after impact was estimated and correlated with the drop deformation history and final wax particle shape to develop a capability to predict the shape. While the microfluidic synthesis approach offers precise control over morphology and functionality, large particle throughput is a limitation. The drop impact in a liquid medium emulsion approach is limited to crosslinking or heat sensitive materials but can be extended to large scale production for industrial applications. Both approaches are simple, robust and cost effective making them viable and attractive solutions for complex particle synthesis. The choice of the approach is dependent on considerations such as particle material, size, shape, throughput and end application.
Download or read book Microsystems for Pharmatechnology written by Andreas Dietzel and published by Springer. This book was released on 2016-01-22 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive, state-of-the-art review of microfluidic approaches and applications in pharmatechnology. It is appropriate for students with an interdisciplinary interest in both the pharmaceutical and engineering fields, as well as process developers and scientists in the pharmaceutical industry. The authors cover new and advanced technologies for screening, production by micro reaction technology and micro bioreactors, small-scale processing of drug formulations, and drug delivery that will meet the need for fast and effective screening methods for drugs in different formulations, as well as the production of drugs in very small volumes. Readers will find detailed chapters on the materials and techniques for fabrication of microfluidic devices, microbioreactors, microsystems for emulsification, on-chip fabrication of drug delivery systems, respiratory drug delivery and delivery through microneedles, organs-on-chip, and more.
Download or read book Microfluidic Synthesis of Macroporous Polymer Particles and Development of Multifunctional Porous Polymer Hybrids written by Stanislav Dubinsky and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Microfluidics written by Xiao-Ying Yu and published by BoD – Books on Demand. This book was released on 2016-11-23 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing innovations and applications make microfluidics a versatile choice for researchers in many disciplines. This book consists of multiple review chapters that aim to cover recent advances and new applications of microfluidics in biology, electronics, energy, and materials sciences. It provides comprehensive views of various aspects of microfluidics ranging from fundamentals of fabrication, flow control, and droplet manipulation to the most recent exploration in emerging areas such as material synthesis, imaging and novel spectroscopy, and marriage with electronics. The chapters have many illustrations showcasing exciting results. This book should be useful for those who are eager to learn more about microfluidics as well as researchers who want to pick up new concepts and developments in this fast-growing field.
Download or read book Advances in Microfluidic Technologies for Energy and Environmental Applications written by Yong Ren and published by BoD – Books on Demand. This book was released on 2020-05-20 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microfluidics have aroused a new surge of interest in recent years in environmental and energy areas, and inspired novel applications to tackle the worldwide challenges for sustainable development. This book aims to present readers with a valuable compendium of significant advances in applying the multidisciplinary microfluidic technologies to address energy and environmental problems in a plethora of areas such as environmental monitoring and detection, new nanofluid application in traditional mechanical manufacturing processes, development of novel biosensors, and thermal management. This book will provide a new perspective to the understanding of the ever-growing importance of microfluidics.
Download or read book Emerging Technologies for Nanoparticle Manufacturing written by Jayvadan K. Patel and published by Springer Nature. This book was released on 2021-06-23 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of nanoparticle production methods, scale-up issues drawing attention to industrial applicability, and addresses their successful applications for commercial use. There is a need for a reference book which will address various aspects of recent progress in the methods of development of nanoparticles with a focus on polymeric and lipid nanoparticles, their scale-up techniques, and challenges in their commercialization. There is no consolidated reference book that discusses the emerging technologies for nanoparticle manufacturing. This book focuses on the following major aspects of emerging technologies for nano particle manufacturing. I. Introduction and Biomedical Applications of Nanoparticles II. Polymeric Nanoparticles III. Lipid Nanoparticles IV. Metallic Nanoparticles V. Quality Control for Nanoparticles VI. Challenges in Scale-Up Production of Nanoparticles VII. Injectable Nanosystems VIII. Future Directions and Challenges Leading scientists are selected as chapter authors who have contributed significantly in this field and they focus more on emerging technologies for nanoparticle manufacturing, future directions, and challenges.
Download or read book Micro Reaction Technology in Organic Synthesis written by Charlotte Wiles and published by CRC Press. This book was released on 2016-04-19 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: While continuous processes have found widespread application within chemical production, members of the research and development communities have historically favored the centuries old technique of iterative batch reactions. With the exception of combinatorial and microwave chemistry, little had been done to change the way that synthetic chemists c
Download or read book Development of Droplet Microfluidic Platforms for the Synthesis of Monodisperse Lipid Vesicles and Polymer Particles written by Shia-Yen Teh and published by . This book was released on 2010 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: This body of work presents my approaches to the design and development of microfluidic platforms for synthesizing monodisperse polymer particles and phospholipid vesicles. There is interest in both of these particles for use in a variety of biomedical applications. Poly(D, L-lactideco-glycolic acid) (PLGA) particles in particular have been sought out as vehicles for drug delivery due to their biocompatibility and because the rate of degradation - hence cargo release - can be controlled. On the other hand, liposomes possess membrane structures resembling that of cells, an ability to adopt both hydrophilic and hydrophobic molecules, and are easily functionalized, which make lipid vesicles the ideal candidate for applications ranging from targeted therapeutic delivery to formation of artificial cells. However, current methods of production for both of these particles result in a wide range of sizes and poor cargo uptake efficiency. We address these challenges by utilizing a flow focusing droplet generation design, which allows for fine control over droplet size and improves encapsulation efficiencies. The size of these droplets can be determined by channel geometry and the ratio of fluid flow rates. I will discuss the work I have done to improve upon current technologies to form nano- to micrometer sized PLGA particles and cell-sized lipid vesicles. Solvent evaporation and solvent extraction methods were implemented and tested in several device designs to optimize the formation process. The particles produced were characterized for their stability, size variation, and ability to encapsulate a model drug. The release profiles of PLGA particles were also measured to determine the length of delivery. In addition, I worked on the generation of monodisperse lipid vesicles to investigate the application of liposomes as an artificial cell. As a proof of principle, expression of green fluorescent protein (GFP) was successfully carried out in the lipid vesicles. This demonstrates the versatility of the microfluidic device for generating a range of particles of controlled size for therapeutic agent delivery and artificial cell applications.
