Functionalized Nanofibers
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Functionalized Nanofibers
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Author : Kalim Deshmukh
language : en
Publisher: Elsevier
Release Date : 2023-04-19
Functionalized Nanofibers written by Kalim Deshmukh and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-04-19 with Technology & Engineering categories.
Functionalized Nanofibers: Synthesis and Industrial Applications presents the latest advances in the fabrication, design, processing, and properties of functionalized nanofibers for a range of advanced applications. Sections introduce fabrication, mechanisms, and design of functionalized nanofibers, explaining electrospinning and non-electrospinning techniques, optimization of structural designs, surface functionalization techniques, and characterization methods. Subsequent sections focus on specific application areas, highlighting preparation methods and applications of functionalized nanofibers across biomedicine, surfaces and coatings, food, environment, energy, electronics, and textiles. Finally, environmental impact and safety and legal aspects related to the utilization of functionalized nanofibers are considered. This is a valuable resource for researchers and advanced students with an interest in nanomaterials and nanotechnology, and across other disciplines such as polymer science, chemistry, chemical engineering, and materials science and engineering. Integrates discussions of physics, chemistry, biology and materials science behind functionalized nanofibers Opens the door to a range of applications across biomedicine, surfaces and coatings, food, environment, energy, electronics and textiles Analyzes challenges and opportunities relating to environmental, health and safety issues
Electrospun Functionalized Nanofibers For The Removal Of Anionic Nitrogen Species From Drinking Water
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Author : Humberto E. Gonz̀lez Ribot
language : en
Publisher:
Release Date : 2021
Electrospun Functionalized Nanofibers For The Removal Of Anionic Nitrogen Species From Drinking Water written by Humberto E. Gonz̀lez Ribot and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with Nitrates categories.
Point source discharges from municipal treatment plants, compounded by nonpoint source runoff from excessive land application of fertilizer and manure, has produced nitrogen-impaired surface waters and groundwater across the Midwest. This contamination poses health risks to consumers who rely on drinking water sources with elevated nitrate, which has well-established acute and emerging chronic health impacts. Here, we develop surface-functionalized polymer nanofibers for the selective and high-capacity removal of nitrate from contaminated drinking water supplies, including decentralized sources like private wells. Using the material fabrication approach of electrospinning, we harnessed the properties of surface-segregating quaternary ammonium surfactants (QAS) for the dual purpose of reducing surface tension in the precursor solution to produce more uniformly distributed polyacrylonitrile (PAN) nanofibers and to enrich the PAN scaffold with ion exchange sites resembling those commonly used in nitrate-specific strong base anion exchange resins. Through tailored nanofiber synthesis, we determined the optimal nanofiber formulation for nitrate and nitrite uptake across various material properties and solution conditions representative of water treatment. Notably, work with various QAS (chloride, bromide and iodide salts of tetrabutylammonium; TBAC, TBAB, and TBAI, respectively) led us to propose that the size of the halide counterion impacts QAS surface segregation, which in turn influences the number and density of ion exchange sites on the polymer surface, with uptake greatest using TBAC. Materials with an optimal QAS loading of ~20 wt.% relative to PAN in the precursor sol gel resulted in relatively fast uptake (equilibrium time between 0.75-1.5 hours from kinetic uptake studies) with nitrite and nitrate capacity of 6 and ~8 mg/g, respectively, from isotherm experiments. Uptake was confirmed to occur via an ion exchange mechanism, with an established exchange stoichiometry of 1.3(± 0.5) and 1.5(± 0.2) for nitrate and nitrite, respectively. Materials could also be regenerated with concentrated brine, while also exhibiting selectivity (in more complex solutions with sulfate and carbonate) consistent with commercially available nitrate-selective resins. Overall, electrospinning produces surface-functionalized nanofibers with performance that is comparable to commercial nitrate selective resins while in a versatile membrane platform that may help aid integration into existing point-of-use and point-of-entry treatment devices.
Nanofibers
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Author : Ashok Kumar
language : en
Publisher: IntechOpen
Release Date : 2010-02-01
Nanofibers written by Ashok Kumar and has been published by IntechOpen this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-02-01 with Science categories.
“There’s Plenty of Room at the Bottom” ⎯ this was the title of the lecture Prof. Richard Feynman delivered at California Institute of Technology on December 29, 1959 at the American Physical Society meeting. He considered the possibility to manipulate matter on an atomic scale. Indeed, the design and controllable synthesis of nanomaterials have attracted much attention because of their distinctive geometries and novel physical and chemical properties. For the last two decades nano-scaled materials in the form of nanofibers, nanoparticles, nanotubes, nanoclays, nanorods, nanodisks, nanoribbons, nanowhiskers etc. have been investigated with increased interest due to their enormous advantages, such as large surface area and active surface sites. Among all nanostructures, nanofibers have attracted tremendous interest in nanotechnology and biomedical engineering owing to the ease of controllable production processes, low pore size and superior mechanical properties for a range of applications in diverse areas such as catalysis, sensors, medicine, pharmacy, drug delivery, tissue engineering, filtration, textile, adhesive, aerospace, capacitors, transistors, battery separators, energy storage, fuel cells, information technology, photonic structures and flat panel displays, just to mention a few. Nanofibers are continuous filaments of generally less than about 1000 nm diameters. Nanofibers of a variety of cellulose and non-cellulose based materials can be produced by a variety of techniques such as phase separation, self assembly, drawing, melt fibrillation, template synthesis, electro-spinning, and solution spinning. They reduce the handling problems mostly associated with the nanoparticles. Nanoparticles can agglomerate and form clusters, whereas nanofibers form a mesh that stays intact even after regeneration. The present book is a result of contributions of experts from international scientific community working in different areas and types of nanofibers. The book thoroughly covers latest topics on different varieties of nanofibers. It provides an up-to-date insightful coverage to the synthesis, characterization, functional properties and potential device applications of nanofibers in specialized areas. We hope that this book will prove to be timely and thought provoking and will serve as a valuable reference for researchers working in different areas of nanofibers. Special thanks goes to the authors for their valuable contributions.
Electrospun Nanofibers
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Author : Santosh Kumar Tiwari
language : en
Publisher: Springer Nature
Release Date : 2021-09-14
Electrospun Nanofibers written by Santosh Kumar Tiwari and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-14 with Science categories.
The book provides an up-to-date account of the various techniques of fabrication & functionalization of electrospun nanofibers as well as recent advancements. An overview of the advanced applications of such techniques in different areas is also presented. Both experimental and theoretical approaches related to electrospun nanofibers are covered along with a discussion on the inherent properties of electrospun nanofibers. Therefore, this book provides a unique resource not only to established researchers but also newcomers starting out in this field.
Functionalized Electrospun Nanofibers For Food Science Applications
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Author : Minhui Dai
language : en
Publisher:
Release Date : 2016
Functionalized Electrospun Nanofibers For Food Science Applications written by Minhui Dai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
This work is separated into two individual parts. The first part demonstrates the ability to electrospin reagents into water-soluble nanofibers resulting in a stable on-chip enzyme and a microphage storage format. 1a) Polyvinylpyrrolidone (PVP) nanofibers were spun incorporating the enzyme horseradish peroxidase (HRP). Scanning electron microscopy of the spun nanofibers was used to confirm the non-woven structure with an average diameter of 155±34 nm. The HRP containing fibers were tested for a change in activity following electrospinning and during storage. A colorimetric assay was used to characterize the activity of HRP reacting with the nanofiber mats in a microtiter plate and monitoring the change in absorption over time. Immediately following electrospinning, the activity peak for the HRP decreased by approximately 20%. During a 280 day storage study, the loss in activity began to stabilize at approximately 40%. 1b) We then investigated PVP fibers for T7 bacteriophage storage. The bacteriophage was added to mixtures of polyvinylpyrrolidone and water and electrospun the mixture onto a grounded plate. Trehalose and magnesium salts were added to the mixtures to determine their effect on the infectivity of the bacteriophage following electrospinning, and during storage. The fibers were stored at 20 °C in dry conditions for predetermined amounts of time. The loss of T7 infectivity was determined immediately following electrospinning and during storage using agar overlay plating and plaque counting. It was found that the addition of the magnesium salts resulted in less than a 1 log drop of infective T7 as compared to a drop of approximately 4 logs without the salts. The trehalose did not protect the T7 during the electrospinning process, but had a more significant storage effect. None of the electrospinning methods were as effective as lyophilization. The results indicate that the addition of magnesium salts protects the bacteriophage during the relatively violent and high voltage electrospinning process, but is not as effective as a protectant during storage of the dried T7. Conversely, the addition of trehalose into the electrospinning mix has little effect on the electrospinning, but a more significant role as a protectant during storage. Previous studies have attempted to encapsulate bacteriophage in water-soluble nanofibers for delivery and storage, but the treatment has typically resulted almost complete deactivation of the phage. Here we investigated the effect reagents on the activity of T7 during the electrospinning process as well as storage following the electrospinning. Electrospinning can therefore be seen as a low-cost method for rapid dehydration of viruses. 2) The second part of this work is to produce a conductive polymer electrode. The conducting polymer PEDOT(Poly (3,4-ethylenedixoythiophene) modified with a functional group, gold nanoparticles or nano-structured fibers were investigated for use as electrochemical sensing electrodes. synthesized through a vapor polymerization route. [SN1] 1) Carboxylic functionalized EDOT monomers was synthesized through electrochemical polymerization. 2) Gold nanoparticles were deposited by monomer reduction. 3) PEDOT nanofibers were synthesized by electrospinning followed by vapor phase polymerization. 4) One-step PEDOT fibers were made from wet vapor-phase polymerization. These materials and structures were characterized using TEM, FE-SEM XPS and FTIR. The advantages of these films are the potential to provide bio-probes binding sites and nano-structures for increased sensitivity. The PEDOT matrix is known to improve catalytic oxidation of the ascorbic acid and functional carboxylic groups provide bonding sites. Additionally, the nanometer-sized gold particles or fiber structures have been demonstrated to allow nanomolar sensing of analyte. Thus, these methods should provide a bio-functionalizable surface with the possibility to detect nanomolar levels of a bio-analyte.
Electrospun Hybrid Nanofibers
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Author : Viraj Pratap Nirwan
language : en
Publisher:
Release Date : 2021
Electrospun Hybrid Nanofibers written by Viraj Pratap Nirwan 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.
In this research, an emphasis was given to combine the advantages of nanofibers and immobilization of functional agents using electrospinning. Multifunctional hybrid nanofibers were fabricated using electrospinning and functionalized with agents such as inorganic nanoparticles and polymers. Nanofibers were analyzed by a selection of techniques such as microscopy, spectroscopy, and thermal analyses, beside toxicity and bio-compatibility assays. Here, multifunctional nanofibers were fabricated from polymers such as chitosan, poly(ethylene oxide) (PEO), polystyrene (PS), polycaprolactone (PCL) and further functionalized with gold nanoparticles (AuNPs), inorganic polymers, and titanium nitride nanoparticles (TiN NPs). First, PEO-chitosan blended nanofibers were electrospun and functionalized with AuNPs, synthesized via both wet-chemistry and pulsed laser ablation processes where effects of preparation conditions and functionalization agents on physico-chemical properties of functionalized nanofibers were investigated. Thereafter, pure chitosan (AuNPs) nanofibers were obtained from an improved formulation with higher concentrations of chitosan and bare laser-ablated AuNPs. Hybrid nanofibers were also fabricated by blending smart inorganic polymers namely poly (ferrocenylphosphinoboranes) with homopolymers such as polystyrene (PS) and poly (ethylene oxide) (PEO). Finally, the thesis reports the fabrication of polycaprolactone (PCL)-based nanofibers decorated with (ultra-clean) bare laser-ablated TiN NPs. The nanofibers were analyzed using usual physico-chemical techniques, while biological compatibility and toxicity studies showed no adverse effect on the cell growth.
Electrospun Polymeric Nanofibers
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Author : R. Jayakumar
language : en
Publisher: Springer Nature
Release Date : 2023-04-27
Electrospun Polymeric Nanofibers written by R. Jayakumar and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-04-27 with Technology & Engineering categories.
This volume deals with the various fabrication techniques, surface functionalization and biomedical applications of polymeric fibers possessing different scale and structure. It provides an overview of fabrication techniques such as Co-axial, Centrifugal, Melt and Yarning to procure multiscale, tubular and layered fibrous scaffold employed for biomedical applications. The chapters in this volume discusse the surface/chemical functionalization of fibers which enhance the biological properties of the fibrous scaffolds as well as the development of hybrid, layered and external stimuli-responsive fibrous scaffolds that hold potential application in biosensor and other biomedical fields. In addition, recent advances and applications of polymeric multiscale fibers in tissue engineering, regenerative medicine and drug delivery are presented. The potential use of fibrous scaffolds in bone, neural, tendon/ligament and cardiac tissue engineering, nanofibers as an antimicrobial wound dressing, employed in cancer theragnostics and in the treatment of skin/periodontal infections are discussed. The volume provides expert knowledge on the fabrication techniques, development of different scale and hybrid structure fibers, surface functionalization, layered and external stimuli responsive fibrous scaffolds. It will be beneficial to material/biomaterials scientists, bioengineering and biotechnologists by providing a better understanding on the subject of the innovative applications of fibrous scaffolds in drug delivery, tissue engineering, wound dressings and regenerative medicine.
Functionalized Electrospun Nanofibers Impregnated With Nanoparticles For Degradation Of Chlorinated Compounds
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Author : Odwa Mapazi
language : en
Publisher:
Release Date : 2014
Functionalized Electrospun Nanofibers Impregnated With Nanoparticles For Degradation Of Chlorinated Compounds written by Odwa Mapazi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Dechlorination categories.
Functional Nanofibers For Sensors
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Author : Stanislav Petrik
language : en
Publisher:
Release Date : 2019
Functional Nanofibers For Sensors written by Stanislav Petrik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Electronic books categories.
Electrospun nanomaterials and their applications have increasingly gained interest over the last decade. Nanofibers are known for their exceptional surface area and wide opportunities for their functionalization. These properties have been attractive for various sensing applications; however, mostly electric sensing principles have been reported. An overview of most frequently studied concepts will be presented. A novel approach based on optical detection will be described. Various functionalized nanofiber materials have been used to demonstrate feasibility of realization of miniature sensors of biomedical and chemical values (enzymes reactions, metal ions content, concentration, etc.). Compactness and sensitivity of the sensors are significantly enhanced through original hybrid fiber-optic/nanofiber design. The potential of the new detection principle for various applications (bio-medical, chemical, forensic, automotive, etc.) will be discussed.
Functionalized Nanomaterials For Cancer Research
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Author : Hamed Barabadi
language : en
Publisher: Elsevier
Release Date : 2024-03-29
Functionalized Nanomaterials For Cancer Research written by Hamed Barabadi and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-03-29 with Science categories.
Functionalized Nanomaterials for Cancer Research: Applications in Treatments, Tools and Devices presents an in-depth and step by step description of knowledge on functionalized nanomaterials for cancer research, including treatment and future developments as well as their impact on patients’ overall outcomes. The book discusses the functionalized nanoplatforms for cancer detection and imaging, interactions between nanomaterials and cancer cells, and drug resistant malignancies. The chapters are organized in a manner that can be readily adopted as sources for new and further studies by highlighting the main in vitro and in vivo nano-therapeutic achievements on cancer. Additionally, current trends on functionalized nanomaterials for cancer research and commercial scale opportunities are discussed. It is a valuable resource for researchers, oncologists, students, and members of the biomedical and medical fields who want to learn more about the potential of nanotechnology in cancer research and treatment. Provides comprehensive coverage on functionalized nanomaterials for cancer therapeutics and future developments Explores current trends on functionalized nanomaterials for cancer research and commercial scale opportunities Discusses real-world case studies on functionalized nanomaterials for cancer therapy and research
