US 11,754,374 B2
Energy absorbing nanocomposite materials and methods thereof
Gajanan Bhat, Knoxville, TN (US); Josh Fogle, Orangeburg, SC (US); Jimmy W. Mays, Knoxville, TN (US); and Vikram Srivastava, Atlanta, GA (US)
Assigned to University of Tennessee Research Foundation, Knoxville, TN (US)
Filed by University of Tennessee Research Foundation, Knoxville, TN (US)
Filed on Apr. 1, 2015, as Appl. No. 14/676,257.
Claims priority of provisional application 61/973,654, filed on Apr. 1, 2014.
Prior Publication US 2016/0200882 A1, Jul. 14, 2016
Int. Cl. F41H 1/02 (2006.01); F42D 5/045 (2006.01); F41H 5/04 (2006.01); C08L 75/08 (2006.01); B32B 5/02 (2006.01); C08L 75/06 (2006.01); B32B 5/26 (2006.01); B32B 27/40 (2006.01)
CPC F41H 1/02 (2013.01) [B32B 5/022 (2013.01); B32B 5/26 (2013.01); B32B 27/40 (2013.01); C08L 75/06 (2013.01); C08L 75/08 (2013.01); F41H 5/0471 (2013.01); F42D 5/045 (2013.01); B32B 2250/20 (2013.01); B32B 2262/02 (2013.01); B32B 2262/0215 (2013.01); B32B 2264/02 (2013.01); B32B 2264/025 (2013.01); B32B 2264/10 (2013.01); B32B 2264/108 (2013.01); B32B 2307/536 (2013.01); B32B 2307/54 (2013.01); B32B 2307/56 (2013.01); B32B 2571/00 (2013.01); B32B 2571/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A composite material capable of absorbing and dissipating ballistic forces, the composite material consisting of:
a plurality of layers, wherein each layer of the plurality of layers consists of a nonwoven web and a reinforcing nanoparticle material, wherein the nonwoven web in each layer consists of an elastomer, wherein the elastomer is a thermoplastic polyurethane polymer having a shore A hardness value of 90, wherein the nanoparticle material is coated on the web via ultrasonic spray coating or incorporated in the web via melt blowing, wherein the nanoparticle material is present at an add on weight percent from about 0.2 wt % to about 0.4 wt %, and wherein the nanoparticle material consists of carbon60,
wherein the composite material absorbs and dissipates ballistic forces having a strain rate ranging from 104 Hz to 106 Hz.