US 12,365,764 B2
Fabrication of hydrophobic, mechanically flexible and optically transparent polyimide aerogels
Hani Naguib, Toronto (CA); Omid Aghababaei Tafreshi, Toronto (CA); Shahriar Ghaffari-Mosanenzadeh, North York (CA); and Zia Saadatnia, North York (CA)
Assigned to THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO, Toronto (CA)
Filed by THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO, Toronto (CA)
Filed on Sep. 8, 2023, as Appl. No. 18/243,824.
Prior Publication US 2025/0084214 A1, Mar. 13, 2025
Int. Cl. C08G 73/10 (2006.01); C08J 3/24 (2006.01)
CPC C08G 73/1032 (2013.01) [C08J 3/24 (2013.01); C08J 2379/08 (2013.01)] 25 Claims
 
1. A polyimide aerogel, comprising:
a polyimide-based polymer of the formula 1:

OG Complex Work Unit Chemistry
wherein n is an integer in a range between about 30 to about 50, and
wherein the polymer is physically crosslinked through polymer chain entanglement, and the aerogel is formed by a process including initial gelation for about 1-10 minutes; and
wherein the aerogel is free of polyamic amide polymer.