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Electric field simulation of electrospun PVDF / PEI composite membrane and the effects of different solvent ratio on its properties

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Document pages: 8 pages

Abstract: Based on the finite element calculation theory of electric field, the electric field distribution in a representative electrospinning device is calculated. The electric field structure of needle plate electrospinning device is numerically simulated by ANSYS software. The vector distribution of the nozzle on the spinneret tube is obtained. In order to analyze the effects of different solvent ratios on the properties of a single electrospun PVDF PEI composite membrane, polyvinylidene fluoride and polyetherimide with a mass ratio of 8 2 were dissolved in a mixed solvent. The mixed solvent consists of N, N-dimethylformamide and tetrahydrofuran, which are added in different proportions. PVDF PEI composite fiber membrane was prepared by electrospinningd. Using scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and mechanical properties testing, the effects of tetrahydrofuran on the composite microstructure, crystallinity, and mechanical properties of the PVDF PEI composite fiber membranes are discussed.

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