The principle of high voltage electrospinning

At present, there are more and more laboratories and enterprises using high-voltage electrospinning to prepare and produce nanofiber membranes. Electrospinning is an important technology that is simple to operate and can directly and continuously prepare polymer nanofibers.
Electrospinning, referred to as electrospinning (English: Electrospinning), is a process of extracting nanofibers (generally 200-1000nm) from a polymer solution using a high-voltage electrostatic field. Electrospinning is different from traditional fiber preparation methods. It does not require chemical coagulation or high temperature to produce solid fibers from liquids, and is particularly suitable for the production of polymers or composite molecular fibers.
The reason why high-voltage electrospinning is highly valued by researchers and product development engineers is that the principle of high-voltage electrospinning is simple. It has a certain molecular weight and is soluble in water, inorganic solvents or organic solvents at room temperature. A liquid with a certain viscosity can be used to produce nanofiber membrane-like materials by electrospinning.

The relationship between molecular weight, viscosity and nanofibers:
The higher the molecular weight and viscosity, the easier it is to form fibers; the lower the molecular weight and viscosity, the more difficult it is to form fibers. Nanoparticle membranes can also be prepared by electrostatic spraying. A certain molecular weight and viscosity can prepare an amorphous intermediate film material. The film material of this amorphous intermediate state is often relatively brittle.

Influencing factors of fiber membrane thickness:
The factors that affect the thickness of the fiber membrane are: the main factors such as the design of the electrospinning machine, the spinning time, and the molecular weight of the polymer. Generally, to prepare a fiber membrane with a thickness of <100 microns, good control can be achieved by adjusting the spinning time; to prepare a fiber membrane with a thickness of >100 microns, it is necessary to use a spinning equipment with a good structural design. The equipment requires both positive and negative high-voltage power supplies; there is no extra electric field interference inside the equipment as much as possible. Since the electrostatic field is invisible and intangible, it is very difficult to ensure that there is no additional electric field interference. Through more than ten years of experience accumulation, KONE Micronano engineers have designed a series of laboratory and mass production equipment, all of which can easily prepare nanofiber membranes with a thickness of >500 microns. For specific equipment, please refer to TL-Pro, TL-Pro-BM, TL-OMNI, TL-BM and other series of products.

Influencing factors of fiber membrane output and uniformity:
Electrospinning is a very convenient method for producing nanofiber membranes. However, due to the limitation of the process principle, the yield of the prepared fiber membranes is low, and the uniformity of the membrane is difficult to control. In order to solve the above problems, KONE Micronano has designed and manufactured a series of multi-nozzle heads to ensure that while increasing the output of fiber membranes, reduce or eliminate the electric field repulsion between the needles and ensure that the prepared fiber membranes are highly uniform. Refer to linear multi-nozzle, annular multi-nozzle, array multi-nozzle, coaxial multi-nozzle, etc. For mass production of multi-nozzle equipment, please refer to: TL-20M-500.