Sol composition, aerogel composite, support member provided with aerogel composite, and heat insulator
The present invention relates to a sol composition for forming an aerogel composite, wherein the sol composition is a sol composition with a sufficient pot life for forming an aerogel composite superior in thermal insulation and flexibility, and comprises: at least one selected from the group consisting of a silicon compound having a hydrolyzable functional group or a condensable functional group and a hydrolysis product of the silicon compound having a hydrolyzable functional group; and a silica particle having an average primary particle diameter of 5 to 300 nm or a specific surface area of 10 to 600 m 2 /g.
1. A sol composition for forming an aerogel composite, the sol composition comprising:
at least one silicon compound selected from the group consisting of a silicon compound having a hydrolyzable functional group or a condensable functional group and a hydrolysis product of the silicon compound having a hydrolyzable functional group, and at least one polysiloxane compound having a structure represented by the following formula (B):
wherein R 1b represents an alkyl group, an alkoxy group, or an aryl group; R 2b and R 3b each independently represent an alkoxy group; R 4b and R 5b each independently represent an alkyl group or an aryl group; and m represents an integer of 1 to 50; and
a silica particle having an average primary particle diameter of 5 to 300 nm, or having a specific surface area of 10 to 600 m 2 /g.
2. An aerogel composite as a dried product of a wet gel, wherein the wet gel is a condensate of the sol composition according to claim 1 .
3. An aerogel composite comprising:
an aerogel component; and
a silica particle having an average primary particle diameter of 5 to 300 nm, or having a specific surface area of 10 to 600 m 2 /g,
wherein the aerogel composite has a ladder-type structure represented by the following formula (3):
wherein R 5 , R 6 , R 7 , and R 8 each independently represent an alkyl group or an aryl group; a and c each independently represent an integer of 1 to 3000; and b represents an integer of 1 to 50.
4. The aerogel composite according to claim 3 , having:
a three-dimensional network skeleton formed of the aerogel component and the silica particle; and
a pore.
5. The aerogel composite according to claim 2 , wherein the silica particle is an amorphous silica particle.
6. The aerogel composite according to claim 2 , having a ladder-type structure including struts and a bridge, wherein the bridge has a structure represented by the following formula (2):
wherein R 5 and R 6 each independently represent an alkyl group or an aryl group; and b represents an integer of 1 to 50.
7. The aerogel composite according to claim 6 , having a ladder-type structure represented by the following formula (3):
wherein R 5 , R 6 , R 7 , and R 8 each independently represent an alkyl group or an aryl group; a and c each independently represent an integer of 1 to 3000; and b represents an integer of 1 to 50.
8. A support member provided with an aerogel composite, the support member comprising:
the aerogel composite according to claim 2 ; and
a support member supporting the aerogel composite.
9. A heat insulator comprising the aerogel composite according to claim 2 .
10. The aerogel composite according to claim 3 , wherein the silica particle is an amorphous silica particle.
11. A support member provided with an aerogel composite, the support member comprising:
the aerogel composite according to claim 3 ; and
a support member supporting the aerogel composite.
12. A heat insulator comprising the aerogel composite according to claim 3 .
13. The aerogel composite according to claim 3 , wherein the silica particle has an average primary particle diameter of 5 to 300 nm and a specific surface area of 10 to 600 m 2 /g.
14. The aerogel composite according to claim 3 , wherein the silica particle has an average primary particle diameter of 7 to 200 nm.
15. The aerogel composite according to claim 3 , wherein the silica particle has a specific surface area of 20 to 300 m 2 /g.
16. The aerogel composite according to claim 3 , wherein the silica particle has a specific surface area of 30 to 250 m 2 /g.
17. The sol composition according to claim 1 , wherein the silica particle has an average primary particle diameter of 5 to 300 nm and a specific surface area of 10 to 600 m 2 /g.
18. The sol composition according to claim 1 , wherein the silica particle has an average primary particle diameter of 7 to 200 nm.
19. The sol composition according to claim 1 , wherein the silica particle has a specific surface area of 20 to 300 m 2 /g.
20. The sol composition according to claim 1 , wherein the silica particle has a specific surface area of 30 to 250 m 2 /g.