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The multi-needle electrospinning system is a convenient way to produce fibers with special structures such as core-shell morphologies at a high production rate. In this paper, a specially designed multi-needle electrospinning system is presented. The spinnerets were built-up with an equilateral hexagon array. Each set of 3 needles of the spinnerets were distributed as an equilateral triangle. A coaxial...
The electrospinning system mainly has vertical type and horizontal type according to the geometrical arrangements of ejecting capillary and collection target, where vertical type includes shaft type and converse type. The fibers were obtained in several kinds of typical electrospinning parameters by using three different electrospinning systems. The SEM was used to observe the morphology of fibers,...
The melt-electrospinning setup was designed in this paper. The temperature of every part in the setup,, including injector, nozzle, spinning space and collection target can be measured accurately by thermocouple or infrared radiation thermometers. The study on phenomena and properties of exploration for melt-electrospinning based on the novel device was conducted. The polypropylene was chosen for...
The poly (vinylidene fluoride) (PVDF)/ N, N-dimethylformamide (DMF) solution was taken for example to fabricate insulated membrane by electrospinning in this paper,. It was found experimentally that in the process of electrospinning, the area of membrane collected was bigger and bigger and the fiber diameter was increasing from the bottom to the surface, but the fiber diameter of every layer was uniform...
The electrostatic force from the electric field and the Coulomb force between charges are key forces to overcome the surface tension and viscoelastic force. In this paper, we report the results of a systematic investigation of the effect of variation of the solution rate on the electrospinning of poly (ethylene oxide) water solution. The effect of solution rate on E range on the nozzle, the effect...
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