Nanofiber membrane preparation device

Nanofiber membrane preparation device

Nanofiber membrane preparation device

This process is initiated by applying a high voltage, which generates an electric field between the droplets of the polymer solution and the collector. Spherical solution droplets elongate due to the accumulation of charges on the droplet surface and form a cone shape with the increase of electrostatic force. Once the force reaches a certain limit and overcomes the surface tension of the droplet, the polymer solution will form a jet that moves towards the collector. During this movement, the solvent evaporates and the dried nanofibers deposit on the collector, forming a static net.

In order to maintain the desired morphology of nanofibers, three main parameters should be optimized before and during the static refinement process. They are: environmental conditions; Solution properties; And operational parameters. The properties of a solution are given by the molecular weight, viscosity, surface tension, and electrical conductivity of the polymer material and the polymer solution. In addition, current also has a detectable effect on fiber morphology. The operating parameters are applicable to flow rate, high pressure, and the distance between the nozzle and the collector. The solidification process during fiber formation is related to the evaporation rate of the solvent and depends on environmental conditions, which means that changes in relative humidity and temperature can also alter the characteristics of the fibers.