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Showing 1 to 20 of 32 for “"Electrospun fibers"”.
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Functional electrospun fibers for responsive coatings and sacrificial templates
… or coating. In this work, we explore the use of electrospun core-shell fibers to sequester healing chemistry for protective coatings. In coaxial electrospinning, two immiscible liquids are pumped through the inner (self-protective core) and outer (polymer shell wall) coaxial needles. A high …
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The Mechanical Properties of Individual Electrospun Fibers and Fibrin Fibers
Nanofibers play important mechanical roles in the body. Collagen, the most abundant protein in humans, forms fibers which comprise part of the extracellular matrix and tissues such as bone, cartilage and blood vessels, to name a few. Fibrinogen, a plasma protein, is converted into fibrin fibers …
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Nanostructured electrospun fibers : from superhydrophobicity to block copolymer self-assembly
… and robust method to make ultrafine continuous fibers with diameter on the order of -100 nm from a variety of materials. As a result, numerous applications for electrospun fibers have already been demonstrated including the commercialized ones in the areas of filtration and tissue engineering. …
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The Influence of Branching and Intermolecular Interactions on the Formation of Electrospun Fibers
… measurements that predict the onset of electrospun fiber formation and average fiber diameter. In particular, for neutral, non-associating polymer solutions, the minimum concentration required for fiber formation was the entanglement concentration (Ce), and uniform, bead-free fibers were …
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Integration of Metal-Organic Frameworks with Electrospun Fibers for Heavy Metal Removal and Carbon Dioxide Capture
… thesis investigates the integration of MOFs with electrospun polymer fibers to develop multifunctional composites for CO2 adsorption and heavy metal removal. Two approaches were explored: direct electrospinning of pre-synthesized MOFs with polymer solutions and in situ growth of MOFs on …
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Evaluation of methods to account for release from nanofiber scaffolds
… is a common technique utilized to form fibers from the micro- to nanometer range. Nanofibers form through electrospinning can be utilized as scaffolds since the fiber structures are similar to the structures within the extracellular matrix. Researchers use additives, such as growth …
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Electrospinning of polymeric nanofiber materials : process characterization and unique applications
… recently due to the ease with which fine fibers about 10 nanometers to 10 microns in diameter can be produced from both natural and synthetic polymers. Despite the large volume of publications on this technology, few publications discuss the mechanics of electrospinning. Most publications …
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Investigation of electrospun fibrous scaffolds, locally delivered anti-inflammatory drugs, and neural stem cells for promoting nerve regeneration
… illicit a severe immune response. Biodegradable electrospun fibers are an appealing material for tissue engineering scaffolds, as they strongly resemble the morphology of extracellular matrix. In this study, electrospun fibers composed of poly(L-lactic acid) (PLLA) and polycaprolactone (PCL) were …
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Electrospun nanofibers with tunable electrical conductivity
… is a convenient method to produce nanofibers with controlled diameters on the order of tens to hundreds of nanometers. The resulting nonwoven fiber mats are lightweight, highly porous, and have high specific surface areas around 1 to 100 m2/g. Combined with the high electrical …
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Photo-reactive Surfactant and Macromolecular Supramolecular Structures
… the first time nonwoven fibrous scaffolds were electrospun from a low molar mass gemini ammonium surfactant, N,N–-didodecyl-N,N,N–,N–-tetramethyl-N,N–-ethanediyl-di-ammonium dibromide (12-2-12). Cryogenic transmission electron microscopy (cryo-TEM) and solution rheological experiments revealed …
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An advanced electrospinning method of fabricating nanofibrous patterned architectures with controlled deposition and desired alignment
… the electrical field as well as charge carrying fibers could be switched shortly from one electrode’s location to another, as a result, electrospun fibers could be deposited on the designated areas with desired alignment. A wide range of nanofibrous patterned architectures were constructed using …
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Surface modification of electrospun poly(vinylidene fluoride) nanofibrous microfiltration membrane
… is capable of creating sub-micron to nanoscale fibers through an electrically charged jet of polymer solution/melt. These electrospun fibers have been explored in various applications such as scaffolds for tissue engineering, drug delivery carrier, biosensor/chemosensor, reinforced nanocomposite …
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Morphology and mechanical properties of electrospun polymeric fibers and their nonwoven fabrics
… is a straight forward method to produce fibers with diameter on the order of a few tens of nanometers to the size approaching commercial fibers (on the order of 10 prm or larger). Recently, the length scale effect on physical properties has attracted great attention because of the …
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Fabrication of nanofiber scaffolds by electrospinning and it's potential for tissue engineering
… field to control the deposition of polymer fibers on to a target substrate. This electrospinning strategy can be used to fabricate fibrous polymer mats composed of fiber diameters ranging from several microns down to tens of nanometers. This study assesses the potential of electrospinning, …
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The mechanical testing of single nanofiber
Polymer nanofibers exhibit properties that make them a favorable material for the development of tissue engineering scaffolds, filtration devices, sensors, and high strength lightweight materials. Perfectly aligned PLLA Nanofibers were fabricated by an electrospinning technique under optimum …
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Measuring the Microscale Mechanical Properties of Fibrin Fibers and Cancer Cells
… proteins in blood, is converted into fibrin fibers that perform the essential mechanical task of stemming the flow of blood. Fibrinogen fibers can be fabricated by a technique called electrospinning. We studied the mechanical properties of dry, electrospun fibrinogen fibers using a combined …
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Next generation of electrospun textiles for chemical and biological protection and air filtration
… the nucleophilic action of the amidoximes in the fibers. Bactericidal fiber mats were produced from electrospinning of blends containing a biocide chlorhexidine (CHX). A small amount of high molecular weight poly(ethylene oxide) was incorporated into the blends to facilitate the electrospinning …
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Tunability of Electrospun Scaffolds for Tissue Engineering
… fiber diameter for cell adhesion. However, electrospun scaffolds lack large pores between fibers and result in a densely packed mesh in which cells can adhere only to the surface of the material. Control of scaffold fiber size and porosity is critical to ensure scaffolds have a fiber …
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Osteogenic Scaffolds for Enhanced Graft-Bone Integration in Ligament Tissue Engineering
… rapid integration with the femur and tibia. Electrospun fiber scaffolds continue to be regularly utilized for their high tensile strength, flexibility, and ability to bend. Nevertheless, fibrous scaffolds are inert and require the incorporation of trophic factors to guide tissue regeneration. …
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Synthesis and Non-Covalent Interactions of Novel Phosphonium-Containing Polymers
… to those in the non-ionic networks. The first electrospun fibers from Michael addition crosslinking reactions are reported, and equilibrium ionic liquid uptake experimental results indicated that ionic functional networks absorb close to three times the amount of ionic liquid as non-ionic, …
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