Electrostatic spinning (Electrospinning, ES) was applied to prepare Donepezil HCl loaded nanofibers as a potential orally dissolving dosage form.Electrospinning of water solutions different polymers were performed in order fabricate consistent and removable web on the collector with ultra-fast dissolution based media.Poly(vinyl-alcohol) low molecular weight found be most appropriate for this purpose.Morphology prepared characterized by scanning electron microscope function viscosity drug...

Face masks are becoming one of the most useful personal protective equipment with outbreak coronavirus (CoV) pandemic. The entire world is experiencing shortage disposable and melt-blown non-woven fabrics, which raw material mask filter. Recyclability discarded also a big challenge for environment. Here, we introduce facile method based on electrospinning three-dimensional printing to make changeable biodegradable filters. We printed polylactic acid (PLA) polymer struts PLA nanofiber web...

Respiratory parameters, such as respiratory rate (RR), inhalation time (tin), exhalation (tex), and their ratio (IER=tin/tex), are of great importance to indicate clinical differences between healthy people those with diseases. Herein, we report a respiration monitoring triboelectric nanogenerator (RM-TENG) nanofibrous membranes, which can be used smart, changeable, self-powered mask filter high filtration efficiency for multiple indices (e.g., RR, tin, tex, IER). We created mathematical...

The aim of this work was to investigate the suitability electrospinning for biodrug delivery and develop an electrospinning-based method produce vaginal drug systems.Lactobacillus acidophilus bacteria were encapsulated into nanofibers three different polymers (polyvinyl alcohol polyvinylpyrrolidone with two molar masses).Shelf life could be enhanced by exclusion water preparing a solid dosage form, which is advantageous patient-friendly way administration.The formulations stored at -20, 7...

The advantages of green composites are including, but not limited to their environmental friendly nature, lightweight, reduction production energy and costs, recyclability. This work focuses on the mechanical, thermal, dynamic mechanical properties biocomposites. For that purpose, biosourced polymers were used, namely polylactic acid (PLA) sisal fiber, biocomposites extruded then injection molded with different contents fibers (5%, 10%, 15%). results show increase rate reinforcement improves...

In this study, we analyzed the influence of process parameters on diameter and orientation nanofibers electrospun with alternating current (AC), using surface response methodology. The design experiment was adopted four main parameters: solution concentration, collection distance, voltage speed. morphology examined a scanning electron microscope. Nanofiber characterized by fast Fourier transform method. We used Box-Behnken model to predict nanofibers, results showed good agreement measured...

Two sets of segmented polyurethane (PU) elastomers were prepared from 4,4!-methylenebis(phenyl isocyanate) (MDI), 1,4-butanediol (BD) and a polyester or polyether polyol, respectively.The molecular mass both polyols was 1000 g/mol.The stoichiometric ratio isocyanate hydroxyl groups 1 the polyol/total diol changed 0 to in 0.1 steps.One step bulk polymerization carried out an internal mixer samples compression molded for testing.The results proved that specific interactions determine phase...

The effect of polyacrylonitrile nanofibrous interlaminar layers on the impact properties unidirectional and woven carbon fabric (CF)-reinforced epoxy (EP) matrix composites was investigated.The nanofibers were produced directly surface fabrics by a needleless electrospinning method, then prepared vacuum-assisted impregnation.Interlaminar shear stress tests, three-point bending, Charpy-impact instrumented falling weight tests carried out.The fracture surfaces analyzed scanning electron...

During the COVID-19 pandemic, UV-C germicidal lamps became widely available, even for household applications. However, their long-term degradation effects on mechanical and rheological properties of polylactic acid (PLA) are still not well established. The relationship between its molecular structure macroscale hardly known. In this study, we investigated exposure to irradiation PLA interpreted results at scale. We performed gel permeation chromatography, Fourier-transform infrared...

Triple-shape memory epoxy (EP)/polycaprolactone (PCL) systems (PCL content: 23 wt %) with different structures nanoweb embedded in EP matrix and EP/PCL co-continuous phase structure) were produced. To set the two temporary shapes, glass transition temperature (Tg) of melting (Tm) PCL served during shape cycle. An attempt was made to reinforce by graphene nanoplatelets prior infiltrating through vacuum assisted resin transfer molding. Morphology analyzed scanning electron microscopy Raman...

The present paper investigates how the presence of nanofiber interleaves affects compressibility layup during manufacturing composites and hence determining theoretically attainable fiber volume fraction at given processing pressure.The results show that up to interleave areal density 10 g/m 2 per layer decrease does not exceed 3% for a laminate carbon woven fabric.Interleaves inside fabric are more compressible than plain electrospun veil.It can be explained as nanofibers penetrate between...

Polymer-based electrospun amorphous solid dispersions (ASDs) were prepared and investigated from pharmaceutical application point of view.Spironolactone (SPIR) was used as model drug mixed in various concentrations with polymers suitable for fibre formation, such vinylpyrrolidone-vinyl acetate copolymer, polyvinylpyrrolidone K30 hydroxypropyl methylcellulose.Single needle electrospinning applied at first screening the composition ASDs.Scaling-up selected polymer-drug combination accomplished...

There is an effort to use hydrogen peroxide for recycling carbon fibre from epoxy matrix composites because it ecofriendly material, and the related technology feasible. However, there little information on technoeconomic impact of this method, thus whether economically better than current techniques. Therefore, in paper, we discuss analysis using peroxide. The also includes a thermodynamic model calculate amount energy required decompose matrix. Various financial indicators, including...

The incorporation of nanomaterials into polymer melts has been widely studied in recent years with the aim improving mechanical properties 3D printed products. But it is still challenging, due to poor dispersion additives and difficult processability resulting high-viscosity material. Here, we propose a novel fabrication process enhance structure, overcome above-mentioned issues. It method based on fused filament printing application nanofiber interleaves. We used poly (lactide acid) (PLA)...

In this study, we demonstrate a novel 3D printing method and printhead capable of objects, which are combinations nano-/microfibers solid or infill layers. The is unique combination material extrusion melt-blowing: the filament can be fused then either deposited turned into ultrafine fiber mats with aid hot pressurized air. This study introduces operation prototype device, computational fluid dynamics (CFD) simulations airflow field, various tests on generated specimens. We were able to make...

This study introduces systematic and comparative investigations of various PLA fine fiber mats prepared by melt blowing. A series PLLA PDLA melt-blown fibers from L D enantiomers blends were produced. Their morphological, mechanical, thermal properties studied, their decomposition in water compost was investigated. It found that the 1:1 ratio blend with stereocomplex crystals had an 80% lower average diameter, 60% higher specific strength better stability than mats. In case composting,...

Even though electrospinning is getting more and attention, the preparation of 3D nanofibrous meshes still a big challenge that limits application electrospun materials, especially in tissue engineering. To overcome this problem, several solutions are introduced but most them focus on postprocessing meshes. This paper presents straightforward novel method utilizes joint effect addition CaCl

ABSTRACT This article presents a review of the recent findings on combination electrospun nanofibers and three‐dimensional (3D)‐printed structures for extracellular matrix (ECM) scaffolds bone tissue engineering. We explore synergy between electrospinning (ES), which produces highly porous, fibrous from materials like collagen gelatin, 3D printing, allow precise scaffold design using biopolymers. discuss selection appropriate biopolymers based their mechanical properties, biocompatibility,...