Composite material
Disclosed herein are engineered composite materials suitable for applications that can benefit from a composite material capable of interacting with or responding to, in a controlled or pre-determined manner, changes in its surrounding environment, such as to attenuate a compression wave. The composite material generally includes a plurality of repeating units, with each repeating unit including a first layer of particles having a first mean diameter, and a second layer of particles having a second mean diameter, and an intermediary material that allows mobility of and contact between the first particles within the first layer and mobility of and contact between the second particles within the second layer; the contact allowing momentum transfer between the particles. The first mean diameter and second mean diameter are different and are less than 500 nm. The first or second particles may be core-shell particles having a core that is partly or completely filled with a liquid, a gas and/or a gel, such as a fire suppressant, a medically active agent or a dye.
1. A composition comprising:
a plurality of repeating units, wherein each of the plurality of repeating units comprises:
a first layer of first particles having a first mean diameter, and
a second layer of second particles having a second mean diameter; and an intermediary material selected from the list consisting of ionomers, polymers, polymerizable monomers, resins, cyclodextrins or combinations thereof,
wherein said intermediary material allows mobility of and contact between the first particles within the first layer and mobility of and contact between the second particles within the second layer, whereby said contact allows momentum transfer between said particles, and
wherein the first mean diameter and the second mean diameter are different and are less than 500 nm; and
wherein the first particles or the second particles are core-shell particles having a core that is partly or completely filled with a liquid, a gas and/or a gel; and
wherein the composition attenuates a compression wave.
2. The composition of claim 1 , wherein the first particles or the second particles are polystyrene.
3. The composition of claim 1 , wherein the first particles or the second particles are silica.
4. The composition of claim 3 , wherein the first particles or the second particles are polarized.
5. The composition of claim 1 , wherein the first particles or the second particles contain metal.
6. The composition of claim 5 , wherein the first particles or the second particles are copper.
7. The composition of claim 1 , wherein a composition of the first particles and a composition of the second particles are different.
8. The composition of claim 1 , wherein at least a portion of the first particles in the first layer contact at least a portion of the second particles in the second layer.
9. The composition of claim 1 , wherein at least a portion of the first particles or the second particles of a repeating unit are in contact with at least a portion of adjacent first particles or adjacent second particles of an adjacent repeating unit.
10. The composition of claim 1 , further comprising a binding layer between a repeating unit and an adjacent repeating unit.
11. The composition of claim 1 , wherein at least one of the plurality of repeating units is in contact with a substrate.
12. The composition of claim 11 , wherein the substrate is at least a portion of an electronic device.
13. The composition of claim 11 , wherein the substrate is glass.
14. The composition of claim 1 , wherein the first mean diameter and the second mean diameter are less than 250 nm.
15. The composition of claim 1 , wherein at least one of the plurality of repeating units comprises a third layer of third particles of a third mean diameter.
16. The composition of claim 1 , wherein the first particles or the second particles comprise a binding coating.
17. The composition of claim 16 , wherein the binding coating is hydrophobic.
18. The composition of claim 1 , wherein the composition is transparent.
19. The composition of claim 1 , wherein the core-shell particles are partly or completely filled with a fire suppressant, a foaming agent, a medically active agent or a dye.