Ut-battelle, Inc.

Lockheed Martin Energy Research Corporation

Lockheed Martin Energy Systems, Inc.

Claude Clifford Eberle

Amit Kumar Naskar

Gerard Michael Ludtka

Felix Leonard Paulauskas

Soydan Ozcan

Tomonori Saito

Christopher James Janke

Frederick S Baker

Gail Mackiewicz Ludtka

Jonathan Richard Mielenz

Joseph M Pickel

Mohamed Gabr Abdallah

Robert E Norris

John Daniel Kennedy Rivard

David H Howell

Method for the preparation of carbon fiber from fiber precursor, wherein the fiber precursor is subjected to a magnetic field of at least 3 Tesla during a carbonization process. The carbonization process is generally conducted at a temperature of at least 400&#xb0; C. and less than 2200&#xb0; C., wherein, in particular embodiments, the carbonization process includes a low temperature carbonization step conducted at a temperature of at least or above 400&#xb0; C. or 500&#xb0; C. and less than or up to 1000&#xb0; C., 1100&#xb0; C., or 1200&#xb0; C., followed by a high temperature carbonization step conducted at a temperature of at least or above 1200&#xb0; C. In particular embodiments, particularly in the case of a polyacrylonitrile (PAN) fiber precursor, the resulting carbon fiber may possess a minimum tensile strength of at least 600 ksi, a tensile modulus of at least 30 Msi, and an ultimate elongation of at least 1.5%.

Magneto-carbonization method for production of carbon fiber, and high performance carbon fibers made thereby

The present invention relates to a crosslinked lignin comprising a lignin structure having methylene or ethylene linking groups therein crosslinking between phenyl ring carbon atoms, wherein said crosslinked lignin is crosslinked to an extent that it has a number-average molecular weight of at least 10,000 g/mol, is melt-processible, and has either a glass transition temperature of at least 100&#xb0; C., or is substantially soluble in a polar organic solvent or aqueous alkaline solution. Thermoplastic copolymers containing the crosslinked lignin are also described. Methods for producing the crosslinked lignin and thermoplastic copolymers are also described.

Lignin-derived thermoplastic co-polymers and methods of preparation

An object comprised of a curable material and formed by stereolithography or another three-dimensional prototyping method, in which the object has undergone initial curing, is subjected to post-curing by ionizing radiation, such as an electron beam having a predetermined beam output energy, which is applied in a predetermined dosage and at a predetermined dose rate. The post-cured object exhibits a property profile which is superior to that which existed prior to the ionizing radiation post-curing.

Ionizing radiation post-curing of objects produced by stereolithography

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Knoxville, TN, United States of America

Claude Clifford Eberle