Abstract
This study focuses on the influence of electrospinning processes on the properties of electrospun fibres. We have optimised the parameters: distance, voltage, concentration of electrospinning to analyse the influence of these parameters on the properties, in particular the structure and morphology of the nano-fibres. The mass of the required polyamide was measured using an analytical balance and dissolved in formic acid to obtain a homogeneous mixture. The solution was stirred for 24 hours and then cooled and inserted into the syringe to be electro-threaded. The concentration of the solution played a decisive role during the spinning process and influenced in particular the determination of the diameter but also the morphology of the nanofibres. A concentration of 15% PA-6 and a low viscosity solution of 266 mPa allowed us to obtain higher quality fibres. The results obtained by the SEM show that the increase in the electric field causes the fibre diameter to increase from 170nm to 234nm. The structures, nano-fibre morphologies and thermal properties of PA-6 have been characterised using scanning electron microscopy (SEM), differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). Defect-free fibres with extremely small diameters and a large specific surface area were produced. Which we will use to manufacture photo deformable textiles. After spinning the flawless fibres, we can continue this study in the near future by adding a fire retardant active ingredient to the polyamide solution, to improve the resistance of the fibres and their morphology.
Highlights
Many methods have been used to prepare polymer nanofibers in recent years, such as template synthesis [1,2], phase separation [3], self-assembly [4, 5], and electrospinning [6, 7]
A design of experiment (DoE) based on the response surface method has been developed to determine the impact of key electrospinning parameters on the morphology of nano-fibers
The morphology of the fiber structures was studied by scanning electron microscopy (SEM)
Summary
Many methods have been used to prepare polymer nanofibers in recent years, such as template synthesis [1,2], phase separation [3], self-assembly [4, 5], and electrospinning [6, 7]. Its concentration is adjusted to obtain regular fibers This concentration must be sufficient to obtain a continuous jet of solution, ensuring the polarization of the electrospinning solution, the other electrode being fixed to the collector, usually grounded [10]. From a mechanical point of view, in order to ensure the electrospinning process, a high voltage (14-20 kV) is applied in order to create a jet, electrically charged, of the polymer solution out of the needle. The control of electrospinning parameters strongly influences the results of the experiments and is critical to preserve homogeneous fiber morphology
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