Browsing by Author "Lomeda, Jay R."

Now showing 1 - 4 of 4
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    Composite materials for reversible CO2 capture
    (2016-03-15) Tour, James M.; Hwang, Garry Chih-chau; Lomeda, Jay R.; Rice University; United States Patent and Trademark Office
    Composite materials for carbon dioxide (C02) capture that include: (1) a mesoporous carbon source; and (2) an in situ polymerized polymer that is associated with the mesoporous carbon source, where the in situ polymerized polymer is selected from the group consisting of thiol-based polymers, amine-based polymers, and combinations thereof. Methods of making the composite materials for C02 capture include: (1) associating a mesoporous carbon source with monomers, where the monomers are selected from the group consisting of thiol-based monomers, amine-based monomers, and combinations thereof; and (2) polymerizing the monomers in situ to form said composite materials. Further embodiments of the present invention pertain to methods of capturing C02 from an environment by associating the environment with one or more of the aforementioned composite materials.
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    Dissolution of graphite, graphite and graphene nanoribbons in superacid solutions and manipulation thereof
    (2017-01-03) Tour, James M.; Pasquali, Matteo; Behabtu, Natnael; Lomeda, Jay R.; Kosynkin, Dmitry V.; Duque, Amanda; Green, Micah J.; Parra-vasquez, A. Nicholas; Young, Colin; Rice University; United States Patent and Trademark Office
    Methods for dissolving carbon materials such as, for example, graphite, graphite oxide, oxidized graphene nanoribbons and reduced graphene nanoribbons in a solvent containing at least one superacid are described herein. Both isotropic and liquid crystalline solutions can be produced, depending on the concentration of the carbon material The superacid solutions can be formed into articles such as, for example, fibers and films, mixed with other materials such as, for example, polymers, or used for functionalization of the carbon material. The superacid results in exfoliation of the carbon material to produce individual particles of the carbon material. In some embodiments, graphite or graphite oxide is dissolved in a solvent containing at least one superacid to form graphene or graphene oxide, which can be subsequently isolated. In some embodiments, liquid crystalline solutions of oxidized graphene nanoribbons in water are also described.
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    Graphene compositions and drilling fluids derived therefrom
    (2012-05-22) Tour, James M.; Schmidt, Howard K.; Lomeda, Jay R.; Kosynkin, Dmitry V.; Doyle, Condell D.; Rice University; United States Patent and Trademark Office
    Drilling fluids comprising graphenes and nanoplatelet additives and methods for production thereof are disclosed. Graphene includes graphite oxide, graphene oxide, chemically-converted graphene, and functionalized chemically-converted graphene. Derivatized graphenes and methods for production thereof are disclosed. The derivatized graphenes are prepared from a chemically-converted graphene through derivatization with a plurality of functional groups. Derivatization can be accomplished, for example, by reaction of a chemically-converted graphene with a diazonium species. Methods for preparation of graphite oxide are also disclosed.
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    Graphene compositions and methods for production thereof
    (2013-01-29) Tour, James M.; Schmidt, Howard K.; Doyle, Condell D.; Kosynkin, Dmitry V.; Lomeda, Jay R.; Rice University; United States Patent and Trademark Office
    Drilling fluids comprising graphenes and nanoplatelet additives and methods for production thereof are disclosed. Graphene includes graphite oxide, graphene oxide, chemically-converted graphene, and functionalized chemically-converted graphene. Derivatized graphenes and methods for production thereof are disclosed. The derivatized graphenes are prepared from a chemically-converted graphene through derivatization with a plurality of functional groups. Derivatization can be accomplished, for example, by reaction of a chemically-converted graphene with a diazonium species. Methods for preparation of graphite oxide are also disclosed.