United States of America As Represented by the Administrator of Nasa

The United States of America As Represented by the Administrator of the

The Boeing Company

The United States of America As Represented by the United States

National Institute of Aerospace Associates

Rtx Corporation

The United States of America As Represented by the Administrator

The United States of America As Represented by the Administrator of

Analytical Mechanics Associates, Inc.

Elecon, Inc.

John W Connell

Paul M Hergenrother

Joseph G Smith, Jr

Kent A Watson

Christopher J Wohl, Jr

Sayata Ghose

Yi Lin

Emilie J Siochi

John W Hopkins

Marcus Anthony Belcher

Frank L Palmieri

Donavon Mark Delozier

Cheol Park

Joycelyn S Harrison

Jae-Woo Kim

Zoubeida Ounaies

Peter Wolf

Kristopher E Wise

William T Yost

Russell A Wincheski

Dennis C Working

Stephen J Havens

Ya-Ping Sun

Kenneth L Dudley

Robert G Bass

Robin E Southward

Mark S Sinsky

Lucia Monica Veca

Jereme R Doss

Rodolfo I Ledesma

Craig M Thompson

Holly A Elliott

R Gerald Bass

Brandon Moitoso

Terry L St Clair

John D Riehl

Dieter Freitag

Christopher J Hertel

Daniel F Perey

Adrian Andrew Dorrington

Pin Go

Xiaomei Fang

Paul M Danehy

John M Gardner

Nancy M H Holloway

Thomas W Jones

Joshua L Brown

Timothy W Towell

Stephen S Tompkins

Paul Petzar

Gary A Wainwright

Robert C Andrews

Martin Eckhard Zander

Michael R Funk

Caroline J Campbell

Jae Woo Kim

Allison M Crow

Robin L Cravey

William T Kim

Donovan M Delozier

Michael J Fallbach

Richard S Pappa

W Keith Belvin

Frank M Palmieri

Wendell Keith Belvin

David W Sleight

Thomas J Burns

A probe for collecting optically stimulated electron emission to inspect chemical reactions of a surface includes a light source to emit light on the surface, a collector, and a controller. The light source emits light on the surface. The collector is configured to detect photoelectrons emitted from the surface in response to the light from the light source impinging on the surface. The collector is further configured to provide a photocurrent based on the detected photoelectrons. The controller includes at least one processor and is operably coupled to the light source and the collector. The controller is configured to cause the light source to emit light on the surface, receive the photocurrent from the collector, and determine at least one chemical reaction of the surface based on the received photocurrent.

Adsorbate analysis using optically stimulated electron emission

Methods and systems for the laser surface treatment on stainless steel alloys and nickel alloys may include a computer may be programmed to set a laser path corresponding to a predetermined geometric pattern. A laser may be coupled to the computer and apply a pulsed laser beam to a contact surface of the substrate along the predefined geometric pattern. The pulsed laser beam may have a laser power between 0.1 W and 100 W, single pulse fluence 1 mJ/mmand 1025 mJ/mmand a laser speed between 25.4 cm/s and 127 cm/s. The laser may generate an open pore oxide layer on the contact surface of the substrate with a thickness of 0.1-1 μm, an open pore distance of 0.05-1 μm. The open pore oxide layer may have a topography corresponding to the predefined geometric pattern. The topography may contain open pore structures and promote adhesive bond performance.

Laser surface treatment on stainless steel and nickel alloys for adhesive bonding

Compositions including a polyamide, and compaction rollers for an automated fiber placement machine incorporating the composition are provided. The polyamide may be a reaction product of at least one diamine and an aromatic dicarboxylic acid, a hydroxy benzoic acid, or their respective ester or acyl halide derivatives. The at least one diamine may include an amino terminated perfluorinated alkyl ether polymer or oligomer. The composition may have a thermal conductivity of from about 0.2 to about 50 Watts per meter Kelvin (WmK).

Polyamide compositions and articles incorporating the same

Copoly(imide oxetane) materials are disclosed that can exhibit a low surface energy while possessing the mechanical, thermal, chemical and optical properties associated with polyimides. The copoly(imide oxetane)s are prepared using a minor amount of fluorinated oxetane-derived oligomer with sufficient fluorine-containing segments of the copoly(imide oxetane)s migrate to the exterior surface of the polymeric material to yield low surface energies. Thus the coatings and articles of manufacture made with the copoly(imide oxetane)s of this invention are characterized as having an anisotropic fluorine composition. The low surface energies can be achieved with very low content of fluorinated oxetane-derived oligomer. The copolymers of this invention can enhance the viability of polyimides for many applications and may be acceptable where homopolyimide materials have been unacceptable.

Anisotropic copoly(imide oxetane) coatings and articles of manufacture, copoly(imide oxetane)s containing pendant fluorocarbon moieties, oligomers and processes therefor

Compositions including a polyimide and one or more thermally conductive fillers, and compaction rollers for an automated fiber placement machine incorporating the compositions are provided. The polyimide may be a polymeric reaction product of a dianhydride and one or more diamines. The one or more diamines may include a fluorine-containing alkyl ether diamine. The one or more thermally conductive fillers may include one or more of a carbon-based filler, boron nitride, a metal, or combinations thereof. The compositions may have a thermal conductivity of from about 0.2 to about 50 Watts per meter Kelvin (WmK).

Polyimide compositions and articles incorporating the same

Compositions including a poly(arylene ether), and compaction rollers for an automated fiber placement machine incorporating the composition are provided. The poly(arylene ether) may be a reaction product of at least one disubstituted benzophenone and at least one polyol. The at least one polyol may include at least one fluorinated diol. The composition may have a thermal conductivity of from about 0.2 to about 50 Watts per meter Kelvin (WmK).

Poly(arylene ether) compositions and articles incorporating the same

Systems, methods, and devices of the various embodiments provide for the creation of holey graphene meshes (HGMs) and composite articles including HGMs. Various embodiments provide solvent-free methods for creating arrays of holes on holey graphene-based articles formed from dry compression (such as films, discs, pellets), thereby resulting in a HGM. In further embodiments, a HGM can used as part of a composite, such as by: 1) embedding a HGM into another matrix material such as carbon, polymer, metals, metal oxides, etc; and/or (2) the HGM serving as a matrix by filling the holes of the HGM or functionalizing the HGM body with another one or more materials. In various embodiments, HGM can also be made as a composite itself by creating holes on dry-compressed articles pre-embedded with one or more other materials.

Holey graphene mesh and solvent-free manufacturing and composites thereof

A method allows for preparation of CNT nanocomposites having improved mechanical, electrical and thermal properties. Structured carbon nanotube forms such as sheet, yarn, and tape are modified with &#x3c0;-conjugated conductive polymers, including polyaniline (PANT), fabricated by in-situ polymerization. The PANI modified CNT nanocomposites are subsequently post-processed to improve mechanical properties by hot press and carbonization.

Polyaniline/carbon nanotube sheet nanocomposites

Various embodiments provide random copolyimides that may possess the mechanical, thermal, chemical and optical properties associated with polyimides yet achieve a low energy surface. In various embodiments, the copolyimides may be prepared using a minor amounts of a diamino terminated fluorinated alkyl ether oligomer and a diamino terminated siloxane oligomer. The various embodiments include processes for making the copolyimides containing fluorine and silicon surface modifying agents and anisotropic coatings and articles of manufacture from them. Thus the coatings and articles of manufacture made with the copolyimides of the various embodiments may be characterized as having an anisotropic fluorine and silicon composition and low surface energy.

Synthesis of copolyimides containing fluorine and silicon surface modifying agents

Various embodiments provide epoxy modified fluorinated urethane compositions that may provide desirable bulk mechanical properties of conventional coatings, adhesives, or structural matrix resins, while simultaneously exhibiting surface properties that may reduce surface contamination. Various embodiments provide formulations comprising epoxy modified fluorinated alkyl ether including urethane oligomer or polymer resins that may possess the requisite thermal, mechanical, chemical, and optical properties while achieving a low surface energy. In various embodiments, such resins may be prepared from random urethane oligomer compositions including fluorinated alkyl ether segments, in which the oligomers may be terminated with amino groups and subsequently reacted with epoxy including monomers or oligomers.

Synthesis and development of polyurethane coatings containing flourine groups for abhesive applications

Systems, methods, and devices of the various embodiments may enable simultaneous preparation of a substrate for adhesive bonding and detection of minute contaminants on the substrate. Various embodiments may enable detection of contaminants on a surface of a substrate while the surface of the substrate is being prepared for adhesive bonding by laser ablation. Various embodiments may provide an integrated laser treatment and measurement system.

Laser surface treatment and spectroscopic analysis system

Anisotropic copoly(imide oxetane) coatings and articles of manufacture, copoly (imide oxetane)s containing pendant fluorocarbon moieties, oligomers and processes therefor

A method for bonding composite substrates includes coupling a first co-cure prepreg layer having a first off-set amine to epoxide molar ratio onto a surface of a first composite substrate and coupling a second co-cure prepreg layer having a second off-set amine to epoxide molar ratio onto a surface of a second composite substrate. The first and second composite substrates are cured to the first and second co-cure prepreg layers, respectively, using a first cure cycle (including B-stage and cure temperatures) to form a first and a second co-cure prepreg layer portion. The method further includes coupling the first co-cure prepreg layer portion to the second co-cure prepreg layer portion and applying a second cure cycle to cure the first co-cure prepreg layer portion of the first composite substrate to the second co-cure prepreg layer portion of the second composite substrate to form a monolithic covalently bonded composite structure.

Off-set resin formulations and blocking/deblocking resin systems for use as a 'co-cure-ply' in the fabrication of large-scale composite structure

Growing community of inventors

Yorktown, VA, United States of America

John W Connell