Energy absorbing nanocomposite materials and methods thereof

Patent metadata

Field	Value
Publication number	US-11754374-B2
Application number	US-201514676257-A
Country	US
Kind code	B2
Filing date	Apr 1, 2015
Priority date	Apr 1, 2014
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

Composite materials capable of absorbing and dissipating high energy forces such as ballistic impacts and explosive blasts. Composites of elastomers and reinforcing nanoparticle materials are configured to absorb and dissipates high energy forces. Composites can be configured as nonwoven webs, and can be layered. Methods of making a ballistic resistant composite material capable of absorbing and dissipating high energy forces.

First claim

What is claimed is:

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 carbon 60 ,
wherein the composite material absorbs and dissipates ballistic forces having a strain rate ranging from 10 4 Hz to 10 6 Hz.

2. The composite material of claim 1 , wherein the nanoparticle material is coated on the nonwoven web via ultrasonic spray coating at 0.2 add on wt %, and wherein the composite material absorbs and dissipates high energy forces due to an at least 15 times increase in storage modulus and loss modulus as compared to the elastomer alone or the reinforcing nanoparticle material alone, wherein the high energy forces absorbed and dissipated have a strain rate of at least 10 4 Hz.

3. The composite material of claim 1 , wherein the nanoparticle material is present at 0.2 add on wt % and wherein the composite material has a damping ratio of at least 0.3 at a frequency range of about 600 to about 700 Hz.

4. The composite material of claim 1 , wherein the nanoparticle material is present at 0.2 add on wt % and wherein the composite material has a damping ratio of at least 0.2 at a frequency range of about 1200 to about 1340 Hz.

5. An article capable of absorbing and dissipating high energy forces comprising:
the composite material of claim 1 ; and
an article,
wherein the article, when paired with the composite material, absorbs and dissipates high energy forces more than the article alone.

6. The article of claim 5 , wherein the article is ballistic resistant.

Assignees

• Univ Tennessee Res Found

Inventors

• Bhat Gajanan
• Fogle Josh
• Mays Jimmy W
• Srivastava Vikram

Classifications

• F41H5/0471 Primary

  Layered armour containing fibre- or fabric-reinforced layers (in combination with ceramic layers F41H5/0428, with metal layers F41H5/0457) · CPC title

• F41H1/02 Primary

  Armoured or projectile- or missile-resistant garments; Composite protection fabrics {(F41H5/04 takes precedence)} · CPC title

• F42D5/045

  Detonation-wave absorbing or damping means · CPC title

• B32B5/022

  Non-woven fabric · CPC title

• B32B5/26

  another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)} · CPC title