Stabilized print materials

1. A print material, comprising:

a vinylic molecule;

a vinylic cross-linker molecule having a plurality of vinyl groups;

a light-scattering particle having a surface composition;

a quantum dot having a surface composition; and

a polymer dispersant having a functional group from the group consisting of a phosphate group, a phosphonate group, a phosphorus acid group, a sulfate group, a sulfinic acid group, a nitrate group, a carboxylate group, a silyl group, an acidic pendant group, or a combination thereof, wherein the polymer dispersant has a chemical affinity matched to the surface composition of the light-scattering particle and matched to the surface composition of the quantum dot.

2. The print material of claim 1 , further comprising a polymerization initiator.

3. The print material of claim 2 , wherein the polymer is a polyether, a polyester, a polyol, a polyacrylate, a poly alpha olefin, a polystyrene, a polyvinyl resin, a diolefin polymer, a polyphosphonate, a polycarbonate, a silicone, or a combination thereof.

4. The print material of claim 3 , wherein the dispersant has a multifunctional polymer backbone.

5. The print material of claim 1 , wherein the light scattering particle is a titanium dioxide particle.

6. The print material of claim 5 , wherein the vinylic molecule is an acrylate.

7. The print material of claim 1 , further comprising a plurality of light-scattering particles having the surface composition, a plurality of quantum dots, and a mass ratio of quantum dots to light-scattering particles from about 0.5 to about 45.

8. The print material of claim 1 , wherein the print material has a dynamic viscosity of about 4-40 cP at room temperature.

9. A method of making a material layer, comprising:

applying a mixture to a substrate, the mixture comprising:

a vinylic molecule;

a vinylic cross-linking agent having a plurality of vinyl groups;

a light-scattering particle having a surface composition;

a quantum dot having a surface composition; and

a polymer dispersant having a chemical affinity matched to the surface composition of the light-scattering particle and to the surface composition of the quantum dot, the polymer dispersant selected from the group consisting of a polyol, a poly alpha olefin, a polystyrene, a polyvinyl resin, a diolefin polymer, a polyphosphonate, a polycarbonate, and combinations thereof; and

polymerizing the mixture to form a material layer on the substrate.

10. The method of claim 9 , wherein the mixture further comprises a polymerization initiator.

11. The method of claim 9 , wherein the polymer dispersant has an acidic anchor group.

12. The method of claim 9 , wherein the polymer dispersant has pendant structures with carboxylic acid groups, hydroxyl groups, amine groups, or a combination thereof.

13. The method of claim 9 , wherein the polymer dispersant has alcohol groups, carboxylic acid groups, amine groups, or a combination thereof.

14. The method of claim 9 , wherein the polymer dispersant has a multifunctional polymer backbone.

15. The method of claim 9 , wherein the vinylic molecule is an acrylate.

16. The method of claim 9 , wherein the mixture is made by a process comprising:

forming a liquid medium comprising the vinylic molecule, the vinylic cross-linking agent, and the polymerization initiator;

adding a quantum dot composition comprising the quantum dot to the liquid medium;

energetically agitating the liquid medium with the quantum dot;

adding at least a portion of the polymer dispersant to the liquid medium and quantum dots to form a quantum dot precursor;

adding a light-scattering composition comprising the light-scattering particle to the quantum dot precursor to form a pre-product; and

energetically agitating the pre-product to form the mixture.

17. A method of making a print material, comprising:

blending a quantum dot material with a curable material to form a quantum dot mixture;

blending a polymer dispersant with the quantum dot mixture to form a quantum dot precursor, wherein the polymer dispersant comprises a polymer selected from the group consisting of a polyether, a polyester, a polyol, a polyacrylate, a poly alpha olefin, a polystyrene, a polyvinyl resin, a diolefin polymer, a polyphosphonate, a polycarbonate, a silicone, and a combination thereof; and

blending a light-scattering particle material with the quantum dot precursor to make a print material.

18. The method of claim 17 , wherein blending the dispersant with the quantum dot mixture comprises energetically agitating the quantum dot mixture with the dispersant, and blending the light-scattering particle material with the quantum dot precursor comprises energetically agitating the light-scattering particle material with the quantum dot precursor, and wherein the dispersant has a chemical affinity that is matched to a surface composition of light-scattering particles in the light-scattering particle material.

19. The method of claim 17 , wherein the polymer dispersant has an acidic anchor group.

20. The method of claim 17 , wherein the polymer dispersant has a functional group selected from the group consisting of a hydroxyl group, an amine group, an alcohol group, a carboxylic acid group, an acidic pendant group, a phosphate group, a phosphonate group, a phosphoric acid group, a phosphorus acid group, a phosphonic acid group, a sulfate group, a sulfinic acid group, a nitrate group, a pyridyl group, a carboxylate group, a silyl group, or a combination thereof.