Gefei Wu Phones & Addresses
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408 Whitfield Dr, Lexington, KY 40515 (859) 971-6400
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1550 Trent Blvd, Lexington, KY 40515 (859) 971-6400
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1827 Park Pl, Milwaukee, WI 53211 (414) 961-2634
Publications
Us Patents
Shock Absorber Fluid Composition Containing Nanostructures
View pageUS Patent:
7470650, Dec 30, 2008
Filed:
Oct 15, 2004
Appl. No.:
10/966825
Inventors:
Zhiqiang Zhang - Lexington KY, US
Gefei Wu - Lexington KY, US
Frances E. Lockwood - Georgetown KY, US
Daniel J. Dotson - Lexington KY, US
Gefei Wu - Lexington KY, US
Frances E. Lockwood - Georgetown KY, US
Daniel J. Dotson - Lexington KY, US
Assignee:
Ashland Licensing and Intellectual Property LLC - Dublin OH
International Classification:
C10M 125/02
US Classification:
508113, 508116, 508117, 508482, 508491, 516 32
Abstract:
The introduction of nanostructures in a liquid provides a means for changing the physical and/or chemical properties of the liquid. Improvements in heat transfer, electrical properties, viscosity, and lubricity can be realized upon dispersion of nanotubes in liquids. Stable dispersions of nanostructures are described and surfactants/dispersants are identified which can disperse nanostructures in petroleum liquid medium. The appropriate dispersant is chosen for the selected nanostructure material and the oil based medium and the dispersant is dissolved into the liquid medium to form a solution. The nanostructure is added to the dispersant containing the solution with agitation, ultrasonication, and/or combinations thereof. Nanostructures dispersed in a fluid form a nanofluid utilized as a shock absorber oil whereby the nanostructures serve to improve the viscosity index of the fluid or more particularly the shock absorber oil in the form of a lubricant additive.
Nano Gel Wax
View pageUS Patent:
7976624, Jul 12, 2011
Filed:
Nov 12, 2010
Appl. No.:
12/945329
Inventors:
Hida Hasinovic - Lexington KY, US
Gefei Wu - Lexington KY, US
Gefei Wu - Lexington KY, US
International Classification:
C09D 191/06
C09G 1/02
C09G 1/08
C09G 1/02
C09G 1/08
US Classification:
106272, 106 3, 106 10, 106270, 106271, 51307, 51308, 51309
Abstract:
An aqueous gel wax formulation includes a cationic wax microemulsion and an anionically charged polishing agent having a particle size less than about 200 nanometers and optimally a quaternary ammonium substituted silicone and an amino functional silicone. The components combine to form a gel wax formulation which can be applied without buffing.
Peelable Coating Composition
View pageUS Patent:
20050027024, Feb 3, 2005
Filed:
Mar 25, 2004
Appl. No.:
10/809199
Inventors:
Zhiqiang Zhang - Lexington KY, US
Richard Baumgart - Paris KY, US
Michael Dituro - Huntington WV, US
Frances Lockwood - Georgetown KY, US
Daniel Dotson - Lexington KY, US
Wen-Chen Su - Lexington KY, US
Gefei Wu - Lexington KY, US
Richard Baumgart - Paris KY, US
Michael Dituro - Huntington WV, US
Frances Lockwood - Georgetown KY, US
Daniel Dotson - Lexington KY, US
Wen-Chen Su - Lexington KY, US
Gefei Wu - Lexington KY, US
International Classification:
C08J009/00
US Classification:
521050000
Abstract:
This invention relates generally to water resistant peelable protective and decorative clear or pigmented foam coating compositions and, more specifically, to aqueous, polymeric coating compositions which form a protective and/or decorative coating and removably adhere to a variety of substrates, including automotive paints, metals, glass, vinyl, plastics, concrete, natural and synthetic elastomers, and ceramics. The coatings present a three-dimensional expandable foamy structure, and can be readily peeled off from the substrate as a whole piece. The coatings may be formulated for temporary or long-term protection depending upon the application. The peelable coatings can be applied as expandable foam cord, and as a film, paste, gel, paint, etc. as well, whereby the expansion of the foam can be controlled by the formulation and applicator.
Lubricant And Additive Formulation
View pageUS Patent:
20050124504, Jun 9, 2005
Filed:
Aug 10, 2004
Appl. No.:
10/915251
Inventors:
Zhigiang Zhang - Lexington KY, US
Thomas Smith - Lexington KY, US
Gefei Wu - Lexington KY, US
Frances Lockwood - Georgetown KY, US
Richard Baumgart - Paris KY, US
Michael Dituro - Huntington WV, US
Thomas Smith - Lexington KY, US
Gefei Wu - Lexington KY, US
Frances Lockwood - Georgetown KY, US
Richard Baumgart - Paris KY, US
Michael Dituro - Huntington WV, US
International Classification:
C10M125/02
US Classification:
508128000, 508185000, 508113000, 508118000, 508116000
Abstract:
A lubricant composition for use as a concentrate and motor oil having an enhanced thermal conductivity. One preferred composition contains a lubricant composition, nanomaterial, and a dispersing agent or surfactant for the purpose of stabilizing the nanomaterial. One preferred nanomaterial is a high thermal conductivity graphite, exceeding 80 W/m in thermal conductivity. Carbon nano material or nanostructures such as nanotubes, nanofibrils, and nanoparticles formed by grounding and/or milling graphite to obtain a mean particle size less than 500 nm in diameter, and preferably less than 100 nm, and most preferably less than 50 nm. Other high thermal conductivity carbon materials are also acceptable. To confer long-term stability, the use of one or more chemical dispersants or surfactants is useful. The graphite nanomaterials contribute to the overall fluid viscosity and providing a very high viscosity index. Particle size and dispersing chemistry is controlled to get the desired combination of viscosity and thermal conductivity increase from the lubricant. The resulting fluids have unique properties due to the high thermal conductivity and high viscosity index of the suspended particles, as well as their small size.
Use Of Nanomaterials As Effective Viscosity Modifiers In Lubricating Fluids
View pageUS Patent:
20070293405, Dec 20, 2007
Filed:
Aug 1, 2005
Appl. No.:
11/194507
Inventors:
Zhiqiang Zhang - Lexington KY, US
Gefei Wu - Lexington KY, US
Frances Lockwood - Georgetown KY, US
Thomas Smith - Lexington KY, US
Gefei Wu - Lexington KY, US
Frances Lockwood - Georgetown KY, US
Thomas Smith - Lexington KY, US
International Classification:
C10M 169/04
US Classification:
508113000
Abstract:
Nanomaterials have been used as a supplement or replacement of traditional polymer-based viscosity modifiers for lubricants and other related fluids. Compared with traditional polymer-based viscosity modifiers, nanomaterials possess better viscosity-index modification functions, i.e., more even viscosity increase across the whole temperature range. Meanwhile, a cost-effective way of making nanomaterials have been developed based on commercially available graphite materials, and the resulting nanoparticles of graphite are nanodisks (nanoplates). Furthermore, it provides a viscosity modifier which exhibits temporary shear loss, which can contribute to fuel economy, but no permanent shear loss.
Gear Oil Composition Containing Nanomaterial
View pageUS Patent:
20080242566, Oct 2, 2008
Filed:
Mar 7, 2006
Appl. No.:
11/370118
Inventors:
Frances E. Lockwood - Georgetown KY, US
Zhiqiang Zhang - Lexington KY, US
Gefei Wu - Lexington KY, US
Thomas R. Smith - Lexington KY, US
Zhiqiang Zhang - Lexington KY, US
Gefei Wu - Lexington KY, US
Thomas R. Smith - Lexington KY, US
International Classification:
C10M 169/04
US Classification:
508113
Abstract:
The present invention relates to a novel use of nanomaterials as a viscosity modifier and thermal conductivity improver for gear oil and other lubricating oil compositions. The gear oils of the instant invention have a higher viscosity index, higher shear stability, and improved thermal conductivity compared to currently available gear oils. The preferred nanoparticles also impart a reduction in the coefficient of friction, including reduced friction in the boundary lubrication regime. These properties are obtained by replacing part or all of the polymer thickener or viscosity index improver or some other part of the composition normally used in gear oils with nanomaterials of suitable shape, size, and composition.
Lubricants With Enhanced Thermal Conductivity Containing Nanomaterial For Automatic Transmission Fluids, Power Transmission Fluids And Hydraulic Steering Applications
View pageUS Patent:
20080287326, Nov 20, 2008
Filed:
Oct 31, 2007
Appl. No.:
11/981720
Inventors:
Zhiqiang Zhang - Lexington KY, US
Gefei Wu - Lexington KY, US
Frances E. Lockwood - Georgetown KY, US
Gefei Wu - Lexington KY, US
Frances E. Lockwood - Georgetown KY, US
International Classification:
C10M 169/04
US Classification:
508113
Abstract:
A lubricant composition having an enhanced thermal conductivity, up to 80% greater than its conventional analogues, and methods of preparation for these fluids are identified. One preferred composition contains a base oil, nanomaterial, and a dispersing agent or surfactant for the purpose of stabilizing the nanomaterial. One preferred nanomaterial is a high thermal conductivity graphite, exceeding 80 W/m in thermal conductivity. The graphite is ground, milled, or naturally prepared to obtain a mean particle size less than 500 nm in diameter, and preferably less than 100 nm, and most preferably less than 50 nm. The graphite is dispersed in the fluid by one or more of various methods, including ultrasonication, milling, and chemical dispersion. Carbon nanostructures such as nanotubes, nanofibrils, and nanoparticles are another type of graphitic structure useful in the present invention. Other high thermal conductivity carbon materials are also acceptable. To confer long-term stability, the use of one or more chemical dispersants or surfactants is useful. The thermal conductivity enhancement, compared to the fluid without graphite, is proportional to the amount of nanomaterials added. The graphite nanomaterials contribute to the overall fluid viscosity, partly or completely eliminating the need for viscosity index improvers and providing a very high viscosity index. Particle size and dispersing chemistry is controlled to get the desired combination of viscosity and thermal conductivity increase from the base oil while controlling the amount of temporary viscosity loss in shear fields. The resulting fluids have unique properties due to the high thermal conductivity and high viscosity index of the suspended particles, as well as their small size.
High Temperature Shear Stable Nanographite Dispersion Lubricants With Enhanced Thermal Conductivity And Method For Making
View pageUS Patent:
20100022422, Jan 28, 2010
Filed:
May 15, 2007
Appl. No.:
11/803715
Inventors:
Gefei Wu - Lexington KY, US
Zhiqiang Zhang - Lexington KY, US
Frances E. Lockwood - Georgetown KY, US
Stephanie M. McCoy - Lexington KY, US
Thomas R. Smith - Lexington KY, US
Zhiqiang Zhang - Lexington KY, US
Frances E. Lockwood - Georgetown KY, US
Stephanie M. McCoy - Lexington KY, US
Thomas R. Smith - Lexington KY, US
International Classification:
C10M 125/02
C10M 129/26
C10M 133/00
C10M 129/00
C10M 145/14
C10M 129/26
C10M 133/00
C10M 129/00
C10M 145/14
US Classification:
508118, 508113, 508122, 508128, 508130, 508131, 977775
Abstract:
A process for producing a nanographite dispersion in a fluid wherein the thermal conductivity of the dispersion is enhanced from the base fluid by more than 10% for a 1% graphite dispersion. A high purity graphite with high crystallinity and reduced surface damage and oxidation is selected as the starting material. The starting material is subjected to a process of wet media milling in the presence of dispersant and solvent fluid. The mill temperature is controlled to control and reduce surface damage to yield a nanographite with flake shape and controlled aspect ratio until a particle size average of 300 nm diameter and 50 nm is obtained. The process recycles a portion of the milled material to increase the ratio of small particle distribution to large particles in an intermediate product with small and large particle bi-modal distribution. The large particle distribution is removed by a separation process such as centrifugation or filtration.