Method for forming radiation shield and related inorganic structural color paint pigments with different nanoparticle sizes and layer thicknesses

Patent metadata

Field	Value
Publication number	US-2023303865-A1
Application number	US-202318311952-A
Country	US
Kind code	A1
Filing date	May 4, 2023
Priority date	Dec 11, 2018
Publication date	Sep 28, 2023
Grant date	—

Abstract

A method is for forming a radiation shield around an object. The method includes providing an inorganic paint pigment comprising a fluid matrix, and paint flakes carried within the fluid matrix. Each paint flake includes a common aluminum mirror layer having a first major surface and a second major surface opposing the first major surface, a first plasmonic aluminum reflector layer carried by the first major surface, and a second plasmonic aluminum reflector layer carried by the second major surface. The method also includes coating an outer surface of the object with the inorganic paint pigment.

First claim

1 . A method for forming a radiation shield around an object, the method comprising:
providing an inorganic paint pigment comprising
a fluid matrix, and
a plurality of paint flakes carried within the fluid matrix, each paint flake comprising
a common aluminum mirror layer having a first major surface and a second major surface opposing the first major surface,
a first plasmonic aluminum reflector layer carried by the first major surface, and
a second plasmonic aluminum reflector layer carried by the second major surface; and

coating an outer surface of the object with the inorganic paint pigment.

2 . The method of claim 1 wherein the object comprises one of a housing structure, a vehicle, and a fabric.

3 . The method of claim 1 wherein each of the first plasmonic aluminum reflector layer and the second plasmonic aluminum reflector layer comprises an oxide layer over the common aluminum mirror layer, and a layer of self-assembled aluminum particles over the oxide layer.

4 . The method of claim 3 wherein the oxide layer comprises an aluminum oxide layer.

5 . The method of claim 3 wherein plasmon resonance within each of the first plasmonic aluminum reflector layer and the second plasmonic aluminum reflector layer is independent to an angle of incidence for incident visible radiation.

6 . The method of claim 1 wherein the fluid matrix comprises at least one of a solution and a polymer resin.

7 . The method of claim 1 wherein the fluid matrix comprises a binder fluid.

8 . The method of claim 1 wherein the fluid matrix comprises isopropyl alcohol (IPA).

9 . The method of claim 1 wherein each paint flake is symmetric about the common aluminum mirror layer.

10 . An inorganic paint pigment comprising:
a fluid matrix; and a plurality of paint flakes carried within the fluid matrix; each paint flake comprising
a common aluminum mirror layer having a first major surface and a second major surface opposing the first major surface,
a first plasmonic aluminum reflector layer carried by the first major surface, and
a second plasmonic aluminum reflector layer carried by the second major surface;
each of the first plasmonic aluminum reflector layer and the second plasmonic aluminum reflector layer comprising
an oxide layer over the common aluminum mirror layer, and
first and second layers of self-assembled aluminum particles over the oxide layer, each of the first and second layers of self-assembled aluminum particles having different thicknesses.

11 . The inorganic paint pigment of claim 10 wherein the first and second layers of self-assembled aluminum particles are vertically spaced; and wherein each of the first plasmonic aluminum reflector layer and the second plasmonic aluminum reflector layer further comprises a spacer layer between the first and second layers of self-assembled aluminum particles.

12 . The inorganic paint pigment of claim 10 wherein the first and second layers of self-assembled aluminum particles are laterally spaced over the oxide layer.

13 . The inorganic paint pigment of claim 10 wherein the common aluminum mirror layer comprises an aluminum mirror layer.

14 . The inorganic paint pigment of claim 10 wherein the oxide layer comprises an aluminum oxide layer.

15 . The inorganic paint pigment of claim 10 wherein plasmon resonance within each of the first plasmonic aluminum reflector layer and the second plasmonic aluminum reflector layer is independent to an angle of incidence for incident visible radiation.

16 . The inorganic paint pigment of claim 10 wherein the fluid matrix comprises at least one of a solution and a polymer resin.

17 . The inorganic paint pigment of claim 10 wherein the fluid matrix comprises a binder fluid.

18 . A method for making an inorganic paint pigment comprising:
forming a plurality of paint flakes, each paint flake comprising
a common aluminum mirror layer having a first major surface and a second major surface opposing the first major surface,
a first plasmonic aluminum reflector layer carried by the first major surface, and
a second plasmonic aluminum reflector layer carried by the second major surface;
each of the first plasmonic aluminum reflector layer and the second plasmonic aluminum reflector layer comprising
an oxide layer over the common aluminum mirror layer, and
first and second layers of self-assembled aluminum particles over the oxide layer, each of the first and second layers of self-assembled aluminum particles having different thicknesses; and
placing the plurality of paint flakes within a fluid matrix.

19 . The method of claim 18 wherein the first and second layers of self-assembled aluminum particles are vertically spaced; and wherein each of the first plasmonic aluminum reflector layer and the second plasmonic aluminum reflector layer further comprises a spacer layer between the first and second layers of self-assembled aluminum particles.

20 . The method of claim 18 wherein the first and second layers of self-assembled aluminum particles are laterally spaced over the oxide layer.

Assignees

• Univ Central Florida Res Found Inc

Inventors

• Chanda Debashis
• Franklin Daniel
• Cencillo Abad Pablo Manuel

Classifications

• C09D5/32 Primary

  Radiation-absorbing paints {(protection against X-, gamma- or corpuscular radiation G21F)} · CPC title

• C09D7/62 Primary

  modified by treatment with other compounds · CPC title

• C09D7/70

  characterised by shape, e.g. fibres, flakes or microspheres · CPC title

• C09D7/20

  Diluents or solvents · CPC title

• C09C1/0033

  consisting of a metal or an alloy · CPC title