US 12,281,202 B1
Organic and metallic aerogels, composition for the organic and metallic aerogels, and method for manufacturing the organic and metallic aerogels
Nicholas Leventis, Rolla, MO (US); Chariklia Sotiriou-Leventis, Rolla, MO (US); Suraj Donthula, Rolla, MO (US); Gitogo Churu, Dallas, TX (US); Hongbing Lu, Plano, TX (US); Shruti Mahadik-Khanolkar, Portland, OR (US); Abhishek Bang, Portland, OR (US); and Clarissa Wisner, Rolla, MO (US)
Filed by AeroSylent, LLC, Plano, TX (US)
Filed on Aug. 30, 2021, as Appl. No. 17/461,556.
Application 17/461,556 is a division of application No. 14/681,984, filed on Apr. 8, 2015, granted, now 11,104,764.
Claims priority of provisional application 61/977,083, filed on Apr. 8, 2014.
Int. Cl. C08G 73/02 (2006.01); B22F 9/20 (2006.01); C08J 9/28 (2006.01); C08J 9/35 (2006.01); C21D 1/26 (2006.01); C21D 1/74 (2006.01); C21D 9/00 (2006.01)
CPC C08G 73/0233 (2013.01) [B22F 9/20 (2013.01); C08J 9/28 (2013.01); C08J 9/35 (2013.01); C21D 1/26 (2013.01); C21D 1/74 (2013.01); C21D 9/0068 (2013.01); C08J 2201/038 (2013.01); C08J 2205/026 (2013.01); C08J 2205/042 (2013.01); C08J 2379/02 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for producing acid catalyzed Polybenzoxazine (“PBO”) nanoporous Aerogels comprising the steps of:
a) Creating Benzoxazine (“BO”) monomers;
b) Polymerizing the BO monomers using HCL as a catalyst by:
i) Combining the BO monomers in a solvent containing HCL to form a sol;
ii) pouring the sol into molds;
iii) allowing gelation to form wet-gels;
iv) Aging the gels for from six hours to 1.2 days, at room temperature;
v) Washing the gels with DMF;
vi) Drying the gels with super critical fluid CO2, said CO2 then being removed while a supercritical fluid (SCF), thereby forming PBO nanoporous Aerogels;
vii) Step-curing the PBO nanoporous Aerogels in the air at successive temperatures of 160° C. for 1 hr; and then at 180° C. for 1 hr; and then at 200° C. for 24 hrs; and
c) Carbonizing the PBO nanoporous Aerogels by pyrolysis in Ar at 800° C.