Aerogel composite, and supporting member and heat insulation material provided with aerogel composite

1. An aerogel composite comprising:

an aerogel component; and

silica particles, wherein at least a part of the silica particles is coated with the aerogel component,

wherein a content of the silica particles in the aerogel composite is 1 to 25 parts by mass with respect to the total amount of the aerogel composite as 100 parts by mass, and a thermal conductivity coefficient of the aerogel composite at atmospheric pressure and 25° C. is 0.03 W/m·K or less.

2. The aerogel composite according to claim 1 having a three-dimensional network skeleton formed from the aerogel component and the silica particles, and pores.

3. An aerogel composite comprising silica particles as a component constituting a three-dimensional network skeleton, wherein at least a part of the silica particles is coated with an aerogel component, and wherein a content of the silica particles in the aerogel composite is 1 to 25 parts by mass with respect to the total amount of the aerogel composite as 100 parts by mass, and a thermal conductivity coefficient of the aerogel composite at atmospheric pressure and 25° C. is 0.03 W/m·K or less.

4. The aerogel composite according to claim 3 , wherein aerogel composite comprises a plurality of the silica particles arranged in a cluster coated with the aerogel component.

5. The aerogel composite according to claim 1 prepared by drying a wet gel formed from a sol comprising silica particles, and at least one selected from the group consisting of a silicon compound having a hydrolyzable functional group in a molecule and a hydrolysis product of the silicon compound.

6. The aerogel composite according to claim 5 , wherein the sol further comprises at least one selected from the group consisting of a polysiloxane compound having a reactive group in a molecule and a hydrolysis product of the polysiloxane compound.

7. The aerogel composite according to claim 1 , wherein an average primary particle diameter of the silica particles is 1 to 500 nm.

8. The aerogel composite according to claim 1 , wherein a shape of the silica particles is spherical.

9. The aerogel composite according to claim 1 , wherein the silica particles are amorphous silica particles.

10. The aerogel composite according to claim 9 , wherein the amorphous silica particles are at least one selected from the group consisting of a fused silica particles, fumed silica particles, and colloidal silica particles.

11. The aerogel composite according to claim 5 , wherein the drying is conducted at a temperature less than a critical point of a solvent used for the drying, and at an atmospheric pressure.

12. A supporting member with an aerogel composite, comprising the aerogel composite according to claim 1 , and a supporting member carrying the aerogel composite.

13. A heat insulating material comprising the aerogel composite according to claim 1 .

14. The aerogel composite according to claim 1 , wherein the silica particles are coated with the aerogel component in a film form.

15. The aerogel composite according to claim 1 , wherein aerogel composite comprises a plurality of the silica particles arranged in a cluster coated with the aerogel component.

16. The aerogel composite according to claim 15 , wherein the aerogel component coats the entire cluster.

17. The aerogel composite according to claim 4 , wherein the aerogel component coats the entire cluster.