Temperature Sensor Ink Composition With Metal Oxide Nanoparticles

• US 20200132559A1
• Filed: 10/31/2018
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Vella, Sarah J., Song, Guiqin, Smithson, Chad, Zhu, Yujie
• Granted Patent: US 11,085,833 B2
• Time in Patent Office: Days
• CPC Class Codes: B41M 5/0023 Digital printing methods characterised by the inks used inks per se C09D11/00
• CPC Class Codes: C09D 11/033 characterised by the solvent
• CPC Class Codes: C09D 11/037 characterised by the pigment
• CPC Class Codes: C09D 11/106 containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C09D 11/322 Pigment inks
• CPC Class Codes: C09D 11/36 based on non-aqueous solvents
• CPC Class Codes: C09D 11/52 Electrically conductive inks
• CPC Class Codes: G01K 7/226 using microstructures, e.g. silicon spreading resistance

Abstract

A temperature sensitive ink composition including a metal oxide nanoparticle; a binder; a solvent; an optional dispersant; and an optional surfactant; wherein the ink composition is a thermistor ink that exhibits a change in resistance which is dependent on temperature. A process for preparing the ink composition. A process including depositing the ink composition onto a substrate to form deposited features; and optionally, heating the deposited features on the substrate to form temperature sensitive features on the substrate, wherein depositing can include ink jet printing or aerosol jet printing.

Claims

1. A temperature sensitive ink composition comprising:

a metal oxide nanoparticle;

a binder;

a solvent;

an optional dispersant; and

an optional surfactant;

wherein the ink composition is a thermistor ink that exhibits a change in resistance which is dependent on temperature.

2. The ink of claim 1, wherein the metal oxide nanoparticle is selected from the group consisting of cobalt oxide, nickel oxide, iron oxide, manganese oxide, titanium oxide, barium titanium oxide, barium titanate, lead oxide, lead titanate, strontium titanate, zinc oxide, copper oxide, tin oxide, and combinations thereof

3. The ink of claim 1, wherein the metal oxide nanoparticle is a nickel oxide nanoparticle.

4. The ink of claim 1, wherein the binder is selected from the group consisting of polyvinyl butyral, poly vinyl phenol, poly vinyl alcohol, poly(dimethylsiloxane), poly(ethylene vinyl acetate), polyethylene, polypropylene, polystyrene, poly(ethylene glycol), poly(methyl methacrylate), poly(oxymethylene), poly(vinyl phenol-co-methacrylate), poly(isoprene), poly(butadiene), poly(styrene-isoprene-styrene), poly(styrene-butadiene-styrene), polyurethane, polyurea, poly(styrene-ethylene-butylene-styrene), polyester, cellulose, and combinations thereof.

5. The ink of claim 1, wherein the binder is polyvinyl butyral.

6. The ink of claim 1, wherein the solvent is selected from the group consisting of propylene glycol monomethyl ether acetate, 1-phenoxy-2-propanol, di(propylene glycol) monomethyl ether acetate, propylene glycol methyl ether, di(propylene glycol)methyl ether, methyl isobutyl ketone, diisobutyl ketone, methyl ethyl ketone, water, and combinations thereof.

7. The ink of claim 1, wherein the solvent comprises a combination of propylene glycol methyl ether acetate and 1-phenoxy-2-propanol.

8. The ink of claim 1, wherein the metal oxide nanoparticle is present in the ink composition in an amount of from about 1 to about 65 percent by weight based upon the total weight of the ink composition;

and

wherein the binder is present in the ink composition in an amount of from about 0.1 to about 25 weight percent by weight based upon the total weight of the ink composition.

9. The ink of claim 1, wherein the metal oxide nanoparticle is present in an amount of from about 10 to about 50 percent by weight based upon the total weight of the ink composition;

wherein the binder is present in an amount of from about 0.5 to about 25 percent by weight based upon the total weight of the ink composition; and

wherein the solvent is present in an amount of from about 40 to about 99 percent by weight based upon the total weight of the ink composition.

10. The ink of claim 1, wherein a printed thermistor film prepared with the ink of claim 1 provides a β

value which approaches the theoretical value of β

(4300 K).

11. The ink of claim 1, wherein the ink has a viscosity of from about 5 to about 300 centipoise at a temperature of from about 20 to about 30°

C.

12. The ink of claim 1, wherein the metal oxide nanoparticle is a nickel oxide nanoparticle;

and wherein the binder is polyvinyl butyral.

13. The ink of claim 1, wherein the metal oxide nanoparticle is a nickel oxide nanoparticle;

wherein the binder is polyvinyl butyral; and

wherein the solvent comprises a combination of propylene glycol methyl ether acetate and 1-phenoxy-2-propanol.

14. The ink of claim 1, wherein the metal oxide nanoparticle is a nickel oxide nanoparticle;

and

wherein the nickel oxide nanoparticle and binder are present in a ratio of nickel oxide nanoparticle to binder of about 10;

1.

15. A process for preparing an ink composition comprising:

combining a metal oxide nanoparticle;

a binder;

a solvent;

an optional dispersant; and

an optional surfactant;

wherein the ink composition is a thermistor ink that exhibits a change in resistance which is dependent on temperature.

16. The process of claim 15, wherein the metal oxide nanoparticle is selected from the group consisting of cobalt oxide, nickel oxide, iron oxide, manganese oxide, titanium oxide, barium titanium oxide, barium titanate, lead oxide, lead titanate, strontium titanate, zinc oxide, copper oxide, tin oxide, and combinations thereof

17. The process of claim 15, wherein the binder is selected from the group consisting of polyvinyl butyral, poly vinyl phenol, poly vinyl alcohol, poly(dimethylsiloxane), poly(ethylene vinyl acetate), polyethylene, polypropylene, polystyrene, poly(ethylene glycol), poly(methyl methacrylate), poly(oxymethylene), poly(vinyl phenol-co-methacrylate), poly(isoprene), poly(butadiene), poly(styrene-isoprene-styrene), poly(styrene-butadiene-styrene), polyurethane, polyurea, poly(styrene-ethylene-butylene-styrene), polyester, cellulose, and combinations thereof.

18. The process of claim 15, wherein the solvent is selected from the group consisting of propylene glycol monomethyl ether acetate, 1-phenoxy-2-propanol, di(propylene glycol) monomethyl ether acetate, propylene glycol methyl ether, di(propylene glycol)methyl ether, methyl isobutyl ketone, diisobutyl ketone, methyl ethyl ketone, water, and combinations thereof.

19. A process comprising:

providing a composition comprising a metal oxide nanoparticle;

a binder;

a solvent;

an optional dispersant; and

an optional surfactant;

wherein the ink composition is a thermistor ink that exhibits a change in resistance which is dependent on temperature;

depositing the ink composition onto a substrate to form deposited features; and

optionally, heating the deposited features on the substrate to form temperature sensitive features on the substrate.

20. The process of claim 19, wherein depositing the ink composition comprises depositing using ink jet printing or aerosol printing.