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Polybenzimidazole compounds, polymeric media, and methods of post-polymerization modifications

United States Patent

August 21, 2007
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
A PBI compound includes imidazole nitrogens at least a portion of which are substituted with an organic-inorganic hybrid moiety. At least 85% of the imidazole nitrogens may be substituted. The organic-inorganic hybrid moiety may be an organosilane moiety, for example, (R)Me.sub.2SiCH.sub.2-- where R is selected from among methyl, phenyl, vinyl, and allyl. The PBI compound may exhibit similar thermal properties in comparison to the unsubstituted PBI. The PBI compound may exhibit a solubility in an organic solvent greater than the solubility of the unsubstituted PBI. The PBI compound may be included in separatory media. A substituted PBI synthesis method may include providing a parent PBI in a less than 5 wt % solvent solution. Substituting may occur at about room temperature and/or at about atmospheric pressure. Substituting may use at least 5 equivalents in relation to the imidazole nitrogens to be substituted or, preferably, about 15.
Klaehn; John R. (Idaho Falls, ID), Peterson; Eric S. (Idaho Falls, ID), Wertsching; Alan K. (Idaho Falls, ID), Orme; Christopher J. (Shelley, ID), Luther; Thomas A. (Idaho Falls, ID), Jones; Michael G. (Pocatello, ID)
Battelle Energy Alliance, LLC (Idaho Falls, ID)
10/ 862,921
June 7, 2004
GOVERNMENT RIGHTS This invention was made with Government support under Contract DE-AC07-99ID13727 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.