Thickness-limited electrospray deposition

Patent metadata

Field	Value
Publication number	US-12343935-B2
Application number	US-202418942840-A
Country	US
Kind code	B2
Filing date	Nov 11, 2024
Priority date	Jun 12, 2018
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

Self-limiting electrospray compositions including a non-charge-dissipative component and/or a charge-dissipative component. Self-limiting electrospray composition including a plurality of charge-dissipative components and excluding a non-charge-dissipative component. Methods for forming layers of self-limiting thickness. Methods for determining a conductivity of a material. Methods for repairing a flaw in a layer on a surface of an object.

First claim

What is claimed is:

1. A method of thickness-limited, electrospray deposition comprising:
exposing an electrically conductive target to an incident spray comprising a thermo-responsive polymer solution, in the presence of an electric field,
wherein the electrically conductive target has a surface temperature,
wherein the thermo-responsive polymer solution comprises a non-conductive polymer,
wherein the thermo-responsive polymer solution has a solution temperature;
allowing the solution temperature to deviate toward the surface temperature to a deposited temperature at which the non-conductive polymer is immobile; and
allowing the non-conductive polymer to accumulate on the electrically conductive target to form a layer, having a thickness sufficient to repulse the incident spray.

2. The method according to claim 1 , wherein the layer has a spherical shell surface morphology.

3. The method according to claim 1 , wherein allowing the solution temperature to deviate toward the surface temperature to the deposited temperature at which the non-conductive polymer is immobile prompts a spinodal decomposition of the thermo-responsive polymer solution.

4. The method according to claim 1 , wherein non-conductive polymer is selected from the group consisting of poly(n-isopropylacrylamide) and methylcellulose.

5. The method according to claim 1 , wherein the thermo-responsive polymer solution further comprises water in an amount of from about 0.0001 to about 80 percent by weight.

Assignees

• Univ Rutgers

Inventors

• Singer Jonathan P
• Lei Lin

Classifications

• C09D177/06

  Polyamides derived from polyamines and polycarboxylic acids (C09D177/10 takes precedence) · CPC title

• C09D163/00

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• C09D5/26

  Thermosensitive paints · CPC title

• C09D5/24

  Electrically-conducting paints {(conductive materials H01B1/00)} · CPC title

• B05D2601/20

  used for non-pigmentation effect · CPC title