Methods and systems for electrospinning using low power voltage converter

Patent metadata

Field	Value
Publication number	US-12480228-B2
Application number	US-202318370777-A
Country	US
Kind code	B2
Filing date	Sep 20, 2023
Priority date	Feb 5, 2018
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

An electrospinning system, method, and apparatus comprises a dual polarity high voltage power supply with much less power out for safe operation, a solution dispensing assembly held at high positive potential by the dual polarity power supply, a Corona discharge assembly held at high negative potential by the dual polarity power supply, and a drum collector held at ground potential wherein a solution is drawn from the solution dispensing assembly to the drum collector thereby forming a fiber mat.

First claim

What is claimed is:

1 . An electrospinning system comprising:
a power supply; a spooling assembly configured to spool a substrate; a wire held at a voltage above the spooling assembly; a bar held at an opposite voltage below the spooling assembly the bar comprising:
a projection portion;
a first trough on a first side of the projection portion; and
a second trough on a second side of the projection portion; and
a slider for distributing solution on the bar, wherein solution is drawn from the bar to the substrate via a potential difference between the wire and the bar, forming a fiber mat on the substrate.

2 . The electrospinning system of claim 1 wherein the spooling assembly comprises:
a rotating substrate spool;
at least one spinning spool; and
nanofiber substrate spool.

3 . The electrospinning system of claim 1 wherein the slider comprises:
a slider frame, wherein the bar is mounted below the slider frame;
a bottom rail of the slider frame;
a pulley configured in the bottom rail; and
a motor operably connected to the pulley configured to change a position of the slider frame.

4 . The electrospinning system of claim 1 further comprising:
a solution tank configured to supply solution to a syringe fitted with a needle.

5 . The electrospinning system of claim 4 wherein the solution comprises a polymer solution.

6 . The electrospinning system of claim 1 wherein the substrate comprises a non-woven melt-blown polypropylene.

7 . The electrospinning system of claim 1 further comprising:
at least one reflector plate, positioned below the bar.

8 . The electrospinning system of claim 7 wherein the at least one reflector plate is held at a voltage matching that of the bar.

9 . The electrospinning system of claim 1 wherein the power supply comprises a dual polarity power supply.

10 . An apparatus comprising:
a dual polarity power supply; a spooling assembly configured to spool a substrate; a wire held at a voltage above the spooling assembly; a bar held at an opposite voltage below the spooling assembly the bar comprising:
a projection portion;
a first trough on a first side of the projection portion; and
a second trough on a second side of the projection portion; and
a syringe attached to a needle for distributing solution on the bar, wherein solution is drawn from the bar to the substrate via a potential difference between the wire and the bar, forming a fiber mat on the substrate.

11 . The apparatus of claim 10 wherein the apparatus comprises:
a solution tank;
a pump; and
tubing connecting the pump to the syringe.

12 . The apparatus of claim 10 wherein the spooling assembly comprises:
a rotating substrate spool;
at least one spinning spool; and
nanofiber substrate spool.

13 . The apparatus of claim 10 further comprising a slider, wherein the slider comprises:
a slider frame, wherein the bar is mounted below the slider frame;
a bottom rail of the slider frame;
a pulley configured in the bottom rail; and
a motor operably connected to the pulley configured to change a position of the slider frame.

14 . The apparatus of claim 13 further comprising:
a pair of risers connecting the bottom rail to a top dispenser bar mount.

15 . The apparatus of claim 10 wherein the substrate comprises a non-woven melt-blown polypropylene.

16 . The apparatus of claim 10 further comprising:
at least one reflector plate, positioned below the bar.

17 . The apparatus of claim 16 wherein the at least one reflector plate is held at a voltage matching that of the bar.

18 . An electrospinning system comprising:
a dual voltage power supply; a spooling assembly configured to spool a substrate; a wire connected to the dual voltage power supply and held at a voltage above the spooling assembly; a bar connected to the dual voltage power supply and held at an opposite voltage below the spooling assembly; at least one reflector plate, positioned below the bar and held at a voltage matching that of the bar; and a slider for distributing solution on the bar, wherein solution is drawn from the bar to the substrate via a potential difference between the wire and the bar, forming a fiber mat on the substrate.

Assignees

• Fermi Res Alliance Llc
• Fermi Forward Discovery Group Llc

Inventors

• Bidhar Sujit

Classifications

• D01D5/0069

  characterised by the spinning section, e.g. capillary tube, protrusion or pin · CPC title

• D01D5/0061 Primary

  characterised by the electro-spinning apparatus · CPC title

• D01D10/00

  Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected (finishing D02J) · CPC title

• D01D5/0092

  characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields · CPC title

• D01D5/0076

  characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid (D01D5/0046 takes precedence) · CPC title