Stable multi-jet electrospinning with high throughput using the bead structure nozzle

Abstract

A modified bead structure nozzle for the electrospinning process was developed to improve the production efficiency of nanofibers and facilitate the cleaning of equipment. The effects of the flow rate, voltage and receiving distance on the number of jets were studied. The results indicate that the number of stable jets can be effectively controlled by spinning conditions. The rotating spinning phenomenon, which occurred during spinning, was subjected to force analysis. The COMSOL Multiphysics model was applied to simulate the electric field to show that the bead structured nozzle does not change the overall spinning electric field compared with traditional spinning. The results indicate that the bead structure nozzle can produce a stable multi-jet using a curved surface structure and improve the production efficiency of nanofibers. Compared with the high-voltage conditions of needleless spinning, the beadtype nozzle helps to save energy and facilitate cleaning, so as to avoid the production of waste in experimental research and industrial production.

Improvement of PAN separator properties using PVA/malonic acid by electrospinning in lithium ion‐batteries

“…Probably, the observed changes in the blend peaks are related to PVA and MA effects on the blended polymer. 30,33,34 For all separators, the absorption peak at 2,244 cm −1 corresponds to the stretching vibration of the nitrile group. 14 Sharp intense absorptions at 2,932 and 1,452 cm −1 can be assigned to CH asymmetric and symmetric stretching, respectively, these two peaks are the most characteristic peaks of pure PAN.…”

“…As noted above, by increasing the amount of hydrophilic PVA, the fiber interconnection increases. 33 Even though an increase in the concentration of PVA and MA increases the viscosity of the solution and results in thicker fibers. 40 The addition of MA as a good cross-linker has helped to build the network structure, which is also shown in Figure 2.…”

“…The higher wettability, porosity and roughness of the surface will result in greater electrolyte uptake. 29,33 For this reason, the electrolyte uptake in all separators has increased significantly compared to PAN. It is worth noting that the electrolyte uptake of F3 and F4 separators are 810% and 1,150%, respectively, while the electrolyte uptake of the PAN separator is 430%.…”

Electrospun Functional Materials toward Food Packaging Applications: A Review

“…According to the electrospinning raw materials, it can be divided into melt electrospinning [46][47][48], solution electrospinning [49,50] and mixed electrospinning [51][52][53]. According to the design of the spray head, it can be classified as needleless electrospinning [54][55][56], coaxial or triaxial electrospinning [57][58][59][60][61][62], multi-jet electrospinning [63][64][65], etc. The application of electrospinning technology will be described below according to different situations.…”

Electrospinning from a convex needle with multiple jet toward better controlling and enhanced production rate

“…Scaling up the production rate so as to fulfill the industrial needs has been the bottleneck in commercializing electrospinning. Research efforts have been put on developing multiple needle electrospinning and inventing needleless electrospinning . Needleless electrospinning has attracted extensive attention due to its capacity in mass production.…”