US 11,873,383 B2
Thermochromic fenestration films containing vanadium dioxide nanocrystals
Sarbajit Banerjee, College Station, TX (US); Kate E. Pelcher, College Station, TX (US); and Nathan A. Fleer, College Station, TX (US)
Assigned to THE TEXAS A&M UNIVERSITY SYSTEM, College Station, TX (US)
Appl. No. 16/624,872
Filed by THE TEXAS A&M UNIVERSITY SYSTEM, College Station, TX (US)
PCT Filed Jun. 28, 2018, PCT No. PCT/US2018/040064
§ 371(c)(1), (2) Date Dec. 19, 2019,
PCT Pub. No. WO2019/006151, PCT Pub. Date Jan. 3, 2019.
Claims priority of provisional application 62/526,257, filed on Jun. 28, 2017.
Prior Publication US 2020/0131328 A1, Apr. 30, 2020
Int. Cl. C08K 3/22 (2006.01); C08K 7/08 (2006.01); C08K 9/02 (2006.01); C08J 5/18 (2006.01); C01G 3/02 (2006.01); E06B 9/24 (2006.01); C01G 31/02 (2006.01)
CPC C08K 3/22 (2013.01) [C01G 31/02 (2013.01); C08K 7/08 (2013.01); C08K 9/02 (2013.01); C01P 2002/72 (2013.01); C01P 2004/04 (2013.01); C01P 2004/16 (2013.01); C01P 2004/64 (2013.01); C01P 2004/84 (2013.01); C01P 2006/60 (2013.01); C08K 2201/011 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A composition comprising:
a polymeric matrix; and
a crystalline vanadium oxide nanomaterial dispersed in the polymeric matrix, wherein the crystalline vanadium oxide nanomaterial comprises an average smallest dimension between about 100 nm and about 5 nm,
wherein the crystalline vanadium oxide nanomaterial has an insulator-metal electronic transition at a temperature between about −20° C. and about 100° C.,
wherein the insulator-metal electronic transition is accompanied by a modulation of near-infrared (NIR) light transmittance,
wherein an integrated modulation of light transmittance between about 680 nm and about 2,500 nm is between about 5% and about 75%,
wherein an onset of modulation of NIR light transmittance occurs between about 680 nm and about 1750 nm, and
wherein a dried weight:weight ratio of crystalline vanadium oxide nanomaterials to polymeric matrix is between about 0.01 to about 0.6.