Fire-class reinforced aerogel compositions
The current disclosure provides reinforced aerogel compositions that are durable and easy to handle, have favorable performance in aqueous environments, have favorable insulation properties, and have favorable, reaction to fire, combustion and flame-resistance properties. Also provided are methods of preparing or manufacturing such reinforced aerogel compositions. In certain embodiments, the composition has a silica-based aerogel framework, reinforced with an open-cell macroporous framework, and includes one or more fire-class additives, where the silica-based aerogel framework comprises at least one hydrophobic-bound silicon and the composition or each of its components has desired properties.
1. A reinforced aerogel composition comprising:
a reinforced silica-based aerogel material that includes:
a reinforcement material comprising an open-cell macroporous framework (OCMF) material;
a silica-based aerogel material incorporated with the reinforcement material; and an endothermic fire-class additive incorporated with the reinforced aerogel composition; wherein:
the reinforced silica-based aerogel material has an onset of thermal decomposition temperature; and
the endothermic fire-class additive has an onset of thermal decomposition temperature that is within 50° C. of the onset of thermal decomposition temperature of reinforced silica-based aerogel material.
2. The reinforced aerogel composition of claim 1 , wherein the endothermic fire-class additive is present in the reinforced aerogel composition in about 5 wt % to 70 wt %.
3. The reinforced aerogel composition of claim 1 , wherein the OCMF material comprises a melamine based OCMF material.
4. The reinforced aerogel composition of claim 1 , wherein the OCMF material comprises a sheet of OCMF material.
5. The reinforced aerogel composition of claim 1 , wherein the OCNI material comprises a foam material.
6. The reinforced aerogel composition of claim 1 , wherein the reinforced silica-based aerogel material further comprises a hydrophobe.
7. The reinforced aerogel composition of claim 6 , wherein the OCMF material comprises a flammable material, a combustible material, or both.
8. The reinforced aerogel composition of claim 1 , wherein the reinforced aerogel composition has an onset of thermal decomposition of from 280° C. to 390° C.
9. The reinforced aerogel composition of claim 1 , wherein the endothermic fire-class additive comprises halloysite clay.
10. The reinforced aerogel composition of claim 1 , wherein the endothermic fire-class additive does not include kaolin or hydrated alumina.
11. The reinforced aerogel composition of claim 1 , wherein the onset of thermal decomposition temperature of the endothermic fire-class additive corresponds to dehydration or dihydroxylation.
12. The reinforced aerogel composition of claim 1 , wherein the reinforced aerogel composition is characterized by:
i) a liquid water uptake of 20 wt % or less;
ii) a thermal conductivity of 30 mW/M*K or less according to ASTM C518 standard at a temperature of about 37.5 ° C., in an ambient environment, at atmospheric pressure, and at a compression load of about 2 psi.
13. A reinforced aerogel composition comprising:
a reinforced silica-based aerogel material that includes:
a reinforcement material comprising an open-cell macroporous framework (OCMF) material;
a silica-based aerogel material incorporated with the reinforcement material; and an endothermic fire-class additive incorporated with the reinforced aerogel composition; wherein:
the reinforced silica-based aerogel material has a first exothermic heat of decomposition; and
the endothermic fire-class additive has a second exothermic heat of decomposition that is at least 30% of the first exothermic heat of decomposition.
14. The reinforced aerogel composition of claim 13 , wherein the endothermic fire-class additive is present in the reinforced aerogel composition in about 5 wt % to 70 wt %.
15. The reinforced aerogel composition of claim 13 , wherein the OCMF material comprises or is a melamine based OCMF material.
16. The reinforced aerogel composition of claim 13 , wherein the OCMIF material comprises a sheet of OCMF material.
17. The reinforced aerogel composition of claim 13 , wherein the OCMF material comprises a foam material.
18. The reinforced aerogel composition of claim 13 , herein the reinforced silica-based aerogel material further comprises a hydrophobe.
19. The reinforced aerogel composition of claim 18 , wherein the OCMIF material comprises a flammable material, a combustible material, or both.
20. The reinforced aerogel composition of claim 13 , wherein the reinforced aerogel composition has an onset of thermal decomposition of from 350° C. to 390° C.
21. The reinforced aerogel composition of claim 13 , wherein the endothermic fire-class additive comprises halloysite clay.
22. The reinforced aerogel composition of claim 13 , wherein the first exothermic heat of decomposition of the reinforced silica-based aerogel material is from 625 cal/g to 700 cal/g according to EN ISO 1716 standard.
23. The reinforced aerogel composition of claim 13 , further comprising at least two fire-class additives, wherein the respective onsets of thermal decomposition of the at least two fire-class additives are at least 10° C. apart.
24. The reinforced aerogel composition of claim 13 , wherein the endothermic fire-class additive does not include kaolin or hydrated alumina.