Polyacrylonitrile (PAN) is one of the few waterproof polymers that can be spun from relatively safe solvents, facilitating use PAN nanofi bre mats in diverse medical and biological applications, such as tissue engineering cell growth promotion.PAN, on other hand, signifi cantly harder to electrospinning than polyethylene glycol water-soluble biopolymers.In our recent study, we thus varied spinning material parameters for dissolved dimethyl sulfoxide (DMSO) studied spinnability, well...

Electrospun nanofiber mats may serve as new hardware for neuromorphic computing. To enable data storage and transfer in them, they should be magnetic, possibly electrically conductive able to respond further external impulses. Here we report on creating magnetic mats, consisting of magnetically doped polymer nanofibers beads containing larger amounts nanoparticles purposes. Using magnetite iron nickel oxide nanoparticles, a broad range doping ratios could electrospun with needleless...

Magnetic nanofibers are of great interest in basic research, as well for possible applications spintronics and neuromorphic computing. Here we report on the preparation magnetic nanofiber mats by electrospinning polyacrylonitrile (PAN)/nanoparticle solutions, creating a network arbitrarily oriented with high aspect ratio. Since PAN is typical precursor carbon, were stabilized carbonized after electrospinning. The properties containing magnetite or nickel ferrite nanoparticles found to depend...

The combination of textiles and three-dimensional printing offers a wide range research application areas, but only publications in with fused deposition modeling processes can be found so far. In this article the possibility resin directly on stereolithography process is presented. A broad spectrum surfaces examined to clearly present feasibility. It was that most performed without major difficulties, while problems were observed smooth coatings textiles.

Casein is a natural milk protein that has been investigated for various applications. nanofibers are of great interest tissue engineering. Spinning casein alone proven difficult due to its unsuitable viscoelasticity and extensive intermolecular interactions. Our study aims at optimizing casein/poly(ethylene oxide) (PEO) spinning solutions needleless electrospinning. For this purpose, PEO with different molecular weights was mixed caseins in ratios processed parameters. Scanning electron...

Due to their large inner surface, nanofiber mats are often used in tissue engineering and examined with respect cell adhesion, e.g., for cultivation of fibroblasts. The combination different polymers a contact area, however, could also be growth plants including green microalgae. Here, the microalga <em>Chlamydomonas reinhardtii</em> on polymer substrates was examined. We investigated two consisting polyamide (PA6) polyacrylonitrile (PAN) polypropylene (PP) microfiber mat as substrates,...

Textile-based dye-sensitized solar cells (DSSCs) can be created by building the necessary layers on a textile fabric or around fibers which are afterwards used to prepare layer, typically weaving. Another approach is using electrospun nanofiber mats as one more layers. In this work, polyacrylonitrile (PAN) coated conductive polymer poly(3,4-ethylenedioxythiopene) polystyrene sulfonate (PEDOT:PSS) were produce counter electrodes for half-textile DSSCs. The obtained efficiencies comparable...

Due to their electrical and mechanical properties, carbon nanofibers are of large interest for diverse applications, from batteries solar cells filters. They can be produced by electrospinning polyacrylonitrile (PAN), stabilizing the gained nanofiber mats, afterwards, carbonizing them in inert gas. The electrospun base material stabilization process crucial results carbonization process, defining whole fiber morphology. While blending PAN with gelatin gain highly porous has been reported a...

Electrospinning can be used to create nanofibers from diverse polymers in which also other materials embedded. Inclusion of magnetic nanoparticles, for example, results preparation are usually isotropically distributed on the substrate. One method a preferred direction is using spinning cylinder as substrate, not always possible, especially commercial electrospinning machines. Here, another simple technique partly align investigated. Since works strong electric field and fibers thus carry...

Abstract Highly magnified micrographs are part of the majority publications in materials science and related fields. They often basis for discussions far-reaching conclusions on nature specimen. In many cases, reviewers demand researchers deliver only bare minimum to substantiate research hypothesis at hand. this work, we use heterogeneous poly(acrylonitrile) nanofiber nonwovens with embedded nanoparticles demonstrate how an insufficient or biased micrograph selection may lead erroneous...

Nanofi brous mats can be used as a substrate for eukaryotic cell growth in biotechnology, tissue engineering, etc.Several adherent cells (e.g.human fi broblasts) have been shown to grow well on ne bres.For most applications, it is necessary sterilize nanofi before adding the cells.Another possibility would addition of antibiotics and antimycotics culture medium prevent microbial infection.However, are disadvantageous since they might promote resistant bacteria possible future medical...

Electrospun nanofiber mats can be used, e.g., as filter materials, in biotechnological and medical applications, precursors for the preparation of carbon nanofibers, etc. In most cases, large surface-to-volume ratio correspondingly contact area with environment is utilized. This even further increased by introducing nanostructures into nanofibers. One possibility to modify morphology nanofibers or whole based on introduction water-soluble additions spinning solutions insoluble polymers...

To overcome the long-term stability problems of dye-sensitized solar cells (DSSC) due to solvent evaporation and leakage, gelling electrolyte with polymers is an appropriate option. Especially for future applications textile-based DSSCs, which require cost-effective environmentally friendly materials, such improvement necessary. Therefore, temporal progressions efficiencies fill factors non-toxic glass-based DSSCs resulting from different gel electrolytes poly(ethylene oxide) (PEO) are...

Polyacrylonitrile (PAN) nanofiber mats are typical precursors for carbon nanofibers. They can be fixed or even elongated during stabilization and subsequent carbonization to gain straight, mechanically robust These processes necessitate additional equipment are—if the just at edges—prone resulting in specimens breaking, due an uneven force distribution. Hence, we showed a previous study that electrospinning PAN on aluminum foils stabilizing them these substrates, is suitable solution keep...

The electrolyte for dye-sensitized solar cells (DSSCs) is subject of constant innovation, as the problems leakage and drying greatly reduce long-term stability a device. One possible way to solve these use gel polymer electrolytes (GPEs) with gelling structure, which offer different advantages based on used polymers. Here, potential GPE systems dimethyl sulfoxide (DMSO) solvent low-cost, non-toxic environmentally friendly DSSCs were investigated comparatively. In order observe improvement in...

Carbon nanofibers are used for a broad range of applications, from nano-composites to energy storage devices. They typically produced electrospun poly(acrylonitrile) by thermal stabilization and carbonization. The nanofiber mats usually placed freely movable in an oven, which leads relaxation internal stress within the nanofibers, making them thicker shorter. To preserve their pristine morphology they can be mechanically fixated, may cause break. In previous study, we demonstrated that...

Electrospinning allows producing fine polymer fibers with diameters in the range of several hundred nanometers up to some micrometers. While a large amount polymers necessitates spinning either from melt or solutions which are hazardous health and environment, biopolymers other materials water-soluble thus can be spun pure water similar uncritical (i.e. non-toxic, non-hazardous) solutions. aqueous solutions, however, is technological point view often more complicated than using solvents,...

Polyacrylonitrile (PAN) nanofibers, prepared by electrospinning, are often used as a precursor for carbon nanofibers. The thermal carbonization process necessitates preceding oxidative stabilization, which is usually performed thermally, i.e., carefully heating the electrospun nanofibers in an oven. One of typical problems occurring during this strong deformation fiber morphologies—the fibers become thicker and shorter, show partly undesired conglutinations. This problem can be solved...

Polyacrylonitrile belongs to the most often used precursors for carbon fibers. Using electrospinning, polyacrylonitrile nanofiber mats can be prepared and afterwards stabilized carbonized prepare which, by adding other materials, will useful several applications. One of these materials is TiO 2 , which has photocatalytic properties thus as a photocatalyst photodegradation dyes. Here, we report on detailed study stabilization, carbonization electrospun polyacrylonitrile/TiO with varying...

Polyacrylonitrile (PAN) belongs to the group of polymers that are often used for electrospinning, as it can be applied a pre-cursor carbon nanofibres and is spinnable from low-toxic solvent dimethyl sulfoxide (DMSO). While influence different spinning parameters on fibre morphology mass per unit area was investigated in previous study, here we report impact solution, using DMSO wire-based (needleless) electrospinning. Our results show broad range solid contents applied, providing opportunity...

Alongside efficiency, long-term stability of dye-sensitized solar cells (DSSCs) is a key factor regarding their commercialization. One suitable and cost-effective method to increase the prevent leakage evaporation electrolyte by gelling it with polymers such as poly(ethylene oxide) (PEO) gaining gel polymer (GPE). In this study, GPE based on PEO glycerol investigated for first time environmentally friendly DSSCs natural dyes. To evaluate novel glycerol/PEO GPE, ionic conductivity resulting...

Electrospun poly(acrylonitrile) (PAN) nanofibers are typical precursors of carbon nanofibers. During stabilization and carbonization, however, the morphology pristine PAN is not retained if as-spun nanofiber mats treated without an external mechanical force, since internal stress tends to relax, causing whole shrink significantly, while individual fibers thicken curl. Stretching during thermal treatment, in contrast, can result fractures due inhomogeneous stress. Previous studies have shown...

Chitosan is of special interest for biotechnological and medical applications due to its antibacterial, antifungal other intrinsic physical chemical properties. The biopolymer can, e.g., be used purposes, as a filter medium, in products, etc. In all these applications, the inner surface should maximized increase contact area with filtered medium thus chitosan's efficacy. dissolves acidic solutions, opposite neutral water. Electrospinning possible, by co-spinning PEO (poly(ethylene oxide))....

Polyethylene glycol (PEG) is used in a variety of applications, from medicine and pharmaceutics to green wood stabilization skin creams toothpaste.PEG often as coating or supplement for fibres created other materials spun composite fibre combination with materials, such cellulose, collagen PVDF.However, reports about spinning pure PEG are scarce.This why recent project the possibilities nano were examined.Using needleless electrospinning machine "NanoSpider Lab" (Elmarco), we produced mats...