E.i. Dupont De Nemours and Company

Other

University of Florida Research Foundation, Incorporated

Dupont Safety & Construction, Inc.

Steven Raymond Lustig

Anand Jagota

Siqun Wang

Hong Peng Wang

Christopher William Newton

David J Rodini

Steven R Allen

Vlodek Gabara

Joseph Lenning Lowery

Andrew J Sitter

Robert Ray Burch

Mark Andrew Harmer

Mark B Shiflett

Subramaniam Sabesan

Roger Harquail French

Timothy Dee Gierke

Pratibha Laxman Gai

Rakesh H Mehta

Paula Beyer Hietpas

Bibiana Onoa

Eric Maurice Smith

Christopher P Junk

Wallace Gregory Sawyer

Gregory Scott Blackman

Maria Spinu

Mark David Wetzel

Gary W Foggin

Eugene Michael McCarron, Iii

Alexa A Dembek

Brandon Alexander Krick

Edward B Jones

Robert Carl Agreen

Dennis A Redder

The present invention concerns fiber made from a polymer comprising imidazole groups, fiber further having: i) a halide anion, the halide anion being present in an amount of 0.05 to 20.1 weight percent, based on weight of fiber; and ii) sulfur, wherein the sulfur is present in the fiber in an amount of 0.05 to 3 weight percent; the fiber exhibiting hydrochloric acid evolution as identified by TGA-IR between 277.13&#xb0; C. to 448.19&#xb0; C.

Sulfur-containing imidazole fiber having ionically bonded halides

The present invention concerns fiber made from a polymer comprising imidazole groups, fiber further having: i) a halide anion, the halide anion being present in an amount of 0.05 to 20.1 weight percent, based on weight of fiber; and ii) sulfur, wherein the sulfur is present in the fiber in an amount of 0.05 to 3 weight percent.

A low-wear fluoropolymer composite body comprises at least one fluoropolymer and additive particles dispersed therein. Also provided is a process for the fabrication of such a fluoropolymer composite body. The composite body exhibits a low wear rate for sliding motion against a hard counterface, and may be formulated with either melt-processible or non-melt-processible fluoropolymers.

Low-wear fluoropolymer composites

The present invention concerns methods for producing a yarn comprising the steps of: (a) producing a plurality of dope filaments by spinning a polymer solution in sulfuric acid through a multi-hole spinneret, the polymer comprising imidazole groups; (b) coagulating the plurality of dope filaments into an as-spun yarn; (c) contacting the yarn with an aqueous base having a pKa less than or equal to 11; and (d) rinsing the yarn.

Process for preparing aramid copolymer yarn having low residual sulfur

The present invention concerns methods for removing sulfur from a fiber comprising the steps of: a) contacting never-dried sulfur-containing fiber in a yarn with an aqueous base having a pKa less than or equal to 11 to release at least a portion of said sulfur, said sulfur comprising, at least in part, sulfate anions and said yarn comprising fiber derived from polymer comprising imidazole groups; and b) rinsing said yarn to remove at least a portion of released sulfur.

Method for removing sulfur from fiber using a weak base

The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: contacting never-dried sulfate anion-containing polymeric-fiber with an aqueous acid having a pKa of less than 5 to displace at least a portion of the sulfate anions; and b) rinsing the fiber to remove the displaced sulfate ions.

Method for removing sulfur from fiber using an aqueous acid

The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: a) contacting never-dried sulfate anion-containing polymeric-fiber with an halide-containing acid to displace at least a portion of the sulfate ions with halide anions; and b) rinsing the fiber to remove the displaced sulfate ions.

Method for removing sulfur from fiber using halide acid ion exchange

The present invention concerns processes for producing a yarn comprising polymer comprising imidazole groups, the process having the following steps: (a) spinning a solution of polymer in sulfuric acid to give rise to a plurality of dope filaments; (b) coagulating the plurality of dope filaments into a multi-filament as-spun yarn; and (c) washing the as-spun multi-filament yarn with an aqueous acid comprising a halide or an aqueous salt comprising a halide or combination thereof.

Process for preparing yarn derived from aramid copolymer fiber having low residual sulfur

A method to synthesize choline salts to be used as inexpensive ingredients for application in ionic liquids or other applications is disclosed.

Process for the synthesis of choline salts

This invention relates to adsorbents useful for storing hydrogen and other small molecules, and to methods for preparing such adsorbents. The adsorbents are produced by heating carbonaceous materials to a temperature of at least 900&#xb0; C. in an atmosphere of hydrogen.

Storage materials for hydrogen and other small molecules

A method for selecting an operative component to combine first and second immiscible phases includes selecting a first operative component and computing the value of the free energy of mixing for it and the first and second immiscible phases. If the computed free energy is greater than zero, the sigma profile of the first candidate is mutated to define a hypothetical sigma profile of a candidate substitute operative component. The free energy of mixing for the substitute and the first and second immiscible phases is computed. The mutation and computation are repeated for a predetermined number of repetitions or until the free energy of the candidate substitute component and the first and second phases is less than zero, whichever first occurs. A material exhibiting a sigma profile corresponding to that of the candidate substitute producing a free energy of solvation less than zero is selected.

Method for the selection of an operative component for amalgamating a multiple phase system into a single phase system, dispersion or emulsion

Peptides have been generated that have binding affinity to carbon nanostructures and particularly carbon nanotubes. Peptides of or the invention are generally about twelve amino acids in length. Methods for generating carbon nanotube binding peptides are also disclosed.

Carbon nanotube binding peptides

Growing community of inventors

Landenberg, PA, United States of America

Steven Raymond Lustig