US 12,264,207 B2
Water-responsive materials and uses therefor
Xi Chen, New York, NY (US); Rein V. Ulijn, New York, NY (US); Zhi-Lun Liu, New York, NY (US); Yi-Ren Wang, San Jose, CA (US); Daniela Kroiss, New York, NY (US); and Haozhen Wang, New York, NY (US)
Assigned to Research Foundation of the City University of New York, New York, NY (US)
Filed by Research Foundation of the City University of New York, New York, NY (US)
Filed on Mar. 26, 2021, as Appl. No. 17/214,132.
Application 17/214,132 is a continuation in part of application No. 16/376,493, filed on Apr. 5, 2019, granted, now 10,961,988.
Claims priority of provisional application 63/161,190, filed on Mar. 15, 2021.
Claims priority of provisional application 62/781,240, filed on Dec. 18, 2018.
Claims priority of provisional application 62/653,844, filed on Apr. 6, 2018.
Prior Publication US 2021/0214469 A1, Jul. 15, 2021
Int. Cl. C08B 37/00 (2006.01); B25J 9/00 (2006.01); B25J 9/10 (2006.01); C09D 105/00 (2006.01); F03G 7/06 (2006.01)
CPC C08B 37/0081 (2013.01) [B25J 9/0015 (2013.01); B25J 9/1075 (2013.01); C09D 105/00 (2013.01); F03G 7/06 (2013.01); B25J 9/1095 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for actuating an artificial muscle, the method comprising:
exposing a flexible substrate to air with a first humidity, wherein the flexible substrate comprises a surface that is coated with a peptidoglycan from a bacterial cell wall; and
exposing the substrate to air with a second humidity, different than the first humidity, wherein the second humidity causes a change in hygroscopic expansion or contraction of the peptidoglycan, thereby actuating the substrate.