Maryland's Defense Patent Database

The defense community in Maryland is an R&D powerhouse.

Use this database to see the innovative patents that are poised for commercialization.

Carbon nanotube fibers/filaments formulated from metal nanoparticle catalyst and carbon source

Patent image
NRL

Disclosed is a method of: providing a mixture of a polymer or a resin and a transition metal compound, producing a fiber from the mixture, and heating the fiber under conditions effective to form a carbon nanotube-containing carbonaceous fiber. The polymer or resin is an aromatic polymer or a precursor thereof and the mixture is a neat mixture or is combined with a solvent. Also disclosed are a carbonaceous fiber or carbonaceous nanofiber sheet having at least 15 wt. % carbon nanotubes, a fiber or nanofiber sheet having the a polymer or a resin and the transition metal compound, and a fiber or nanofiber sheet having an aromatic polymer and metal nanoparticles.

Inventors: 
Keller, Teddy M.; Laskoski, Matthew
Patent Number: 
US9255003
Technical domain: 
Textiles and Paper
FIle Date: 
2012-06-18
Grant Date: 
2016-02-09
Grant time: 
1,331 days
Grant time percentile rank: 
24
Claim count percentile rank: 
4
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY

Fiber modified with particulate through a coupling agent

Patent image
ARL

An article is provided that includes a polymeric fiber that has an excess number of surface active reactive moieties relative to the number of surface reactive moieties found on the fiber in a native state. A particle is bonded covalently to the fiber through an intermediate coupling agent. Multiple particles can be covalently bonded to the fiber, the multiple particles can be bonded uniformly or asymmetrically around the fiber diameter. A process for modifying a fiber includes creating surface activated reactive moieties thereon. The activated fiber is then exposed to a liquid solution containing a coupling agent to form a covalent bond. The coupling agent is also reacted with a particle in a liquid solution to form a covalent bond between the coupling agent and the particle. The coupling agent is covalently bonded to either a particle and then bonded to the fiber, or vice versa.

Inventors: 
Mcknight, Steven H.; Jensen, Robert E.; Orlicki, Joshua A.
Patent Number: 
US8575045
Technical domain: 
Textiles and Paper
FIle Date: 
2005-05-23
Grant Date: 
2013-11-05
Grant time: 
3,088 days
Grant time percentile rank: 
56
Claim count percentile rank: 
8
Citations percentile rank: 
3
'Cited by' percentile rank: 
1
Assignee: 
US ARMY

Metallized fibers and method therefor

Patent image
NRL

This invention pertains to a product and a method for preparing same. The product is an electrically conducting metallized fibers and a non-conducting composite containing the metallized fibers. In a preferred embodiment, the product is a composite of metallized cellulose fibers disposed in an electrically non-conducting matrix. The method includes the steps of hydrating cellulose fibers to prevent absorption of chemical reagents; activating the cellulose surface of the fibers for metal deposition; removing from the fibers excess activator and reagents used in the activation; drying the fibers to a free-flowing condition whereby the fibers acquire the color of the activator by virtue of its deposition on the fibers; metallizing the fibers to deposit thereon a metal capable of absorbing electromagnetic radiation; drying the metallized fibers whereby they are free-flowing; and forming a composite composed of an electrically non-conductive matrix having dispersed therein the matallized fibers.

Inventors: 
Zabetakis, Daniel; Schoen, Paul E.; Dinderman, Michael A.
Patent Number: 
US7892632
Technical domain: 
Textiles and Paper
FIle Date: 
2004-09-30
Grant Date: 
2011-02-22
Grant time: 
2,336 days
Grant time percentile rank: 
43
Claim count percentile rank: 
3
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY

Bulk synthesis of carbon nanotubes from metallic and ethynyl compounds

Patent image
NRL

A process of making carbon nanotubes comprising the steps of: providing a precursor composition comprising at least one metallic compound and at least one organic compound; wherein the organic compound is selected from the group consisting of an ethynyl compound, a metal-ethynyl complex, and combinations thereof; wherein the precursor composition is a liquid or solid at room temperature; and heating the precursor composition under conditions effective to produce carbon nanotubes. A carbon nanotube composition comprising carbon nanotubes and a metal component selected from the group consisting of metal nanoparticles and elemental metal; wherein the carbon nanotube composition is rigid.

Inventors: 
Keller, Teddy M.; Qadri, Syed B.
Patent Number: 
US7722851
Technical domain: 
Textiles and Paper
FIle Date: 
2008-02-12
Grant Date: 
2010-05-25
Grant time: 
833 days
Grant time percentile rank: 
15
Claim count percentile rank: 
5
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY

Methods of making carbon nanopipes and ductwork with nanometric walls

Patent image
NRL

A method of making a carbon nanopipe and ensemble of carbon nanopipes, comprising the steps of flowing a carbon precursor over silica fibers and thereby depositing a durable graphitizable carbon coating of tunable thickness of about 10-500 nm onto the silica fibers and etching away the silica fibers to yield a three-dimensional mat of electronically networked, hollow carbon tubules. A carbon nanopipe comprising a durable graphitizable carbon wall of tunable thickness of about 10-500 nm formed by exposing a silica fiber network to a carbon precursor vapor and thereby depositing a carbon film onto the silica fiber network at a temperature suitable for complete pyrolysis of the carbon precursor and removing the silica fibers.

Inventors: 
Lytle, Justin C.; Zimmerman, Trevor N.; Rolison, Debra R.
Patent Number: 
US8475698
Technical domain: 
Textiles and Paper
FIle Date: 
2008-08-08
Grant Date: 
2013-07-02
Grant time: 
1,789 days
Grant time percentile rank: 
32
Claim count percentile rank: 
2
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY

Carbon nanopipes and ductwork with nanometric walls and methods of making the same

Patent image
NRL

A carbon nanopipe comprising a durable graphitizable carbon wall of tunable thickness of about 10-500 nm formed by exposing a silica fiber network to a carbon precursor vapor and thereby depositing a carbon film onto the silica fiber network at a temperature suitable for complete pyrolysis of the carbon precursor and removing the silica fibers. The atmosphere of the step of depositing is controlled by a two-stage gas manifold wherein stage 1 purges the reaction chamber with pure argon and stage 2 introduces the carbon precursor.

Inventors: 
Lytle, Justin C.; Zimmerman, Trevor N.; Rolison, Debra R.
Patent Number: 
US9017780
Technical domain: 
Textiles and Paper
FIle Date: 
2012-05-25
Grant Date: 
2015-04-28
Grant time: 
1,068 days
Grant time percentile rank: 
19
Claim count percentile rank: 
3
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY

Fiber reinforcement with 1-silacyclobutane crosslink units

Patent image
NRL

Disclosed herein is a composition having a plurality of particles of a filler material and crosslinking units having the formula —(SiR—CH2—CH2—CH2)—. The silicon atom in the crosslinking unit is directly or indirectly bound to the filler material. Each R is alkyl, alkenyl, phenyl, methyl, ethyl, allyl, halogen, chloro, or bromo. Also disclosed herein is a filler material having the silicon atom of a silacyclobutane group is directly or indirectly bound thereto. Also disclosed herein is a method of crosslinking silacyclobutane groups bound to a plurality of particles of a filler material. The silicon atom of the silacyclobutane group is directly or indirectly bound to the filler material. Also disclosed herein is a composition including a plurality of fibers of a polymer having reactive oxygen atoms and siloxane groups. Coordination bonds are formed between the oxygen atoms and the silicon atoms of the siloxane groups of separate fibers.

Inventors: 
Simonson, Duane L.; Mcgill, Andrew R.; Higgins, Bernadette A.; Papantonakis, Michael
Patent Number: 
US9169400
Technical domain: 
Textiles and Paper
FIle Date: 
2009-07-08
Grant Date: 
2015-10-27
Grant time: 
2,302 days
Grant time percentile rank: 
42
Claim count percentile rank: 
2
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY