Wolfgang M Sigmund

US Patent:

6489017, Dec 3, 2002

Filed:

Apr 10, 2000

Appl. No.:

09/445433

Inventors:

Fritz Aldinger - Leinfelden-Echterdingen, DE
Wolfgang Sigmund - Gainesville FL
Joseph Yanez - North Huntingdon PA

Assignee:

Max-Planck-Gesellschaft zur Fulderung der Wissenschaften E.V. - Munich

International Classification:

B32B 516

US Classification:

428323, 428332, 428357, 428402, 428403, 295275, 264301, 264636, 264637, 264651, 264669, 264670

Abstract:

The invention relates to a method for producing a solid molded article, in particular a ceramic and/or metallic article made of pulverized particles. The invention also relates to stable dispersions of pulverized particles in an aqueous fluid medium, solid molded articles made of pulverized particles, and sintered ceramic and/or metallic molded articles.

US Patent:

7541509, Jun 2, 2009

Filed:

Aug 31, 2005

Appl. No.:

11/216303

Inventors:

Wolfgang M. Sigmund - Gainesville FL, US
Sung-Hwan Lee - Seoul, KR
Benjamin Koopman - Gainesville FL, US
Brij Moudgil - Gainesville FL, US
Georgios Pyrgiotakis - Gainesville FL, US
Vijay Krishna - Gainesville FL, US

Assignee:

University of Florida Research Foundation, Inc. - Gainsville FL

International Classification:

A62D 3/00
A62D 3/17
A62D 3/10
B01J 37/00

US Classification:

588299, 588301, 588306, 502129

Abstract:

A photocatalyst nanocomposite which can be used to destroying biological agents includes a carbon nanotube core, and a photocatalyst coating layer covalently or ionically bound to a surface of the nanotube core. The coating layer has a nanoscale thickness. A method of forming photocatalytic nanocomposites includes the steps of providing a plurality of dispersed carbon nanotubes, chemically oxidizing the nanotubes under conditions to produce surface functionalized nanotubes to provide C and O including groups thereon which form ionic or covalent bonds to metal oxides, and processing a metal oxide photocatalyst sol-gel precursor in the presence of the nanotubes, wherein a nanoscale metal oxide photocatalyst layer becomes covalently or ionically bound to the nanotubes.

US Patent:

7851056, Dec 14, 2010

Filed:

Jun 9, 2005

Appl. No.:

11/149006

Inventors:

Wolfgang M. Sigmund - Gainesville FL, US
Joachim Spatz - Heidenheim, DE

Assignee:

University of Florida Research Foundation, Inc. - Gainesville FL

International Classification:

B32B 29/00

US Classification:

4282951, 4282974, 4282981, 428403, 428500, 427212

Abstract:

Ultralyophobe interfaces that are substantially inert to contaminants, thereby resulting in surfaces that are hydrophobic and/or lyophobic. The substrates include a substrate surface and have a bonding layer and a plurality of flexible fibers bound to the bonding layer. The flexible fibers have an elastic modulus and an aspect ratio, wherein as the elastic modulus of the fiber increases, the aspect ratio increases such that the flexible fibers bend upon contact of a liquid surface.

US Patent:

8585795, Nov 19, 2013

Filed:

Mar 12, 2008

Appl. No.:

12/530703

Inventors:

Wolfgang M. Sigmund - Gainesville FL, US
Vasana Maneeratana - Gainesville FL, US
Paolo Colombo - Padua, IT
Chang-Yu Wu - Gainesville FL, US
Hyoungjun Park - Gainesville FL, US
Qi Zhang - Gainesville FL, US

Assignee:

Univesity of Florida Research Foundation, Inc. - Gainesville FL

International Classification:

B01D 39/06
B01D 39/14
B01D 24/00
B01D 50/00
D02G 3/00
B32B 5/16
F16J 15/20
B32B 9/00

US Classification:

55523, 55522, 55524, 422169, 422170, 422171, 422172, 422177, 422178, 422179, 422180, 422181, 422182, 428359, 428360, 428361, 428362, 428363, 428364, 428365, 428366, 428367

Abstract:

In accordance with the invention there are devices and processes for making ceramic nanofiber mats and ceramic filters for use in high temperature and in corrosive environments. The process for forming a ceramic filter can include electrospinning a preceramic polymer solution into a preceramic polymer fiber having a diameter from about 10 nm to about 1 micron and forming a preceramic polymer fiber web from the preceramic polymer fiber onto a collector. The process can also include pyrolyzing the preceramic polymer fiber web to form a ceramic nanofiber mat having a diameter less than the diameter of the preceramic polymer fiber, the ceramic nanofiber mat comprising one or more of an oxide ceramic and a non-oxide ceramic such that the ceramic fiber mat can withstand temperature greater than about 1000 C.

US Patent:

20050115658, Jun 2, 2005

Filed:

Nov 4, 2004

Appl. No.:

10/980997

Inventors:

Amit Daga - Gainesville FL, US
Wolfgang Sigmund - Gainesville FL, US

International Classification:

C03B029/00

US Classification:

156089110, 156089160

Abstract:

A method of joining components includes the steps of providing a slurry including a solvent, a ceramic, metal or cermet powder and at least one binder selected from natural monomers or cross linkable polymer compositions. The binder is crosslinked to form a gel. The gel is then placed between the first and at least a second component to be joined. The gel is then sintered to form an article having a gelcast joint binding the first and second components. The resulting joint region will generally have the same strength as the first and second components.

US Patent:

20100172994, Jul 8, 2010

Filed:

Nov 23, 2007

Appl. No.:

12/445299

Inventors:

Wolfgang M. Sigmund - Gainesville FL, US
Yi-Yang Tsai - Brandon FL, US
Ioannis Constantinidis - Gainesville FL, US
Jenny Dorley - Gainesville FL, US
Carol Ann Sweeney - Micanopy FL, US
Nicholas Edward Simpson - Alachua FL, US
Mark A. Atkinson - Gainesville FL, US

Assignee:

UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC. - GAINESVILLE FL

International Classification:

A61K 9/14
A61K 35/12
A61K 33/24

US Classification:

424489, 424 937, 424617, 435375, 977773, 977904

Abstract:

The present invention concerns metal oxide semiconductor nanoparticles with free radical scavenging activity, compositions comprising such nanoparticles, methods for their use, and methods for their production. In one aspect, the invention concerns a method for enhancing the survival or viability of transplanted cells, comprising administering an effective amount of metal oxide semiconductor nanoparticles to a target anatomical site of a subject before, during, or after administration of transplant cells to the subject. Preferably, the metal oxide nanoparticle is a cerium oxide (ceria) nanoparticle.

US Patent:

20110003142, Jan 6, 2011

Filed:

Mar 3, 2009

Appl. No.:

12/920790

Inventors:

Masahiro Asuka - Osaka, JP
Wolfgang M. Sigmund - Gainesville FL, US

Assignee:

University of Florida Research Foundation, Inc. - Gainesville FL

International Classification:

B32B 5/16
B05D 3/12
B05D 1/40
B05D 3/02

US Classification:

428329, 427331, 427356, 427240, 427359, 427368, 4273977, 428323, 428328, 977775

Abstract:

A composite hybrid coating having a thick highly transparent hard coating with excellent barrier properties is described. The hybrid coating is the gelled dispersion of nanoparticles in a sol with least one hydrolyzable silane and at least one hydrolyzable metal oxide precursor. In one embodiment a composite hybrid coating is formed by the curing of a dispersion formed by the addition of a suspension of boehmite nanoplatelets in a sol prepared by the hydrolysis of tetraethoxysilane, γ-glycidoxypropyltrimethoxysilane and titanium tetrabutoxide in ethanol. A plastic substrate can be coated with the dispersion and the dispersion gelled to a thickness of at least 5 μm with heating to less than 150 C.

US Patent:

20110206831, Aug 25, 2011

Filed:

Sep 11, 2009

Appl. No.:

13/126206

Inventors:

Masahiro Asuka - Mount Laurel NJ, US
Wolfgang M. Sigmund - Gainesville FL, US

Assignee:

UNIVERSITY OF FLORIDA RESEARCH FOUNDATION INC. - GAINESVILLE FL

International Classification:

C08L 83/06
C08K 3/38
C08K 3/22
C08K 3/28
C08K 3/34
C08K 3/14
B05D 5/12

US Classification:

427 58, 524837, 524701, 524786, 524787, 524789, 977779

Abstract:

A sol to form an inorganic-organic hybrid coating having a thick highly transparent hard coating is described. The hybrid coating is formed from a combined aqueous sol with least one hydrolyzable silane and at least one hydrolyzable metal oxide precursor where the only organic solvents present are those liberated upon hydrolysis of the silanes and metal oxide precursors. In one embodiment an inorganic-organic hybrid coating is formed by combination of a sol, prepared by the hydrolysis of tetraethoxysilane and γ-glycidoxypropyltrimethoxysilane with an excess of water, and a sol, prepared by the hydrolysis of titanium tetrabutoxide and γ-glycidoxypropyltrimethoxysilane with a deficiency of water. A plastic substrate can be coated with the combined sol and the combined sol gelled to a thickness of at least 5 μm with heating to less than 150 C.