摘要:
A multilayered polymeric structure having at least two polymeric layers is provided, each layer being a mixture of a polymeric composition with carbon fibrils. The multilayer polymeric structure may include an electrically conductive material between the first and second polymeric layers. A process for making a multilayered polymeric structure for packaging electronic components is also provided. The multilayered polymeric material is used to form trays and packages for containing electrical components.
摘要:
Compositions including oxycarbide-based nanorods and/or carbide-based nanorods and/or carbon nanotubes bearing carbides and oxycarbides and methods of making the same are provided. Rigid porous structures including oxycarbide-based nanorods and/or carbide based nanorods and/or carbon nanotubes bearing carbides and oxycarbides and methods of making the same are also provided. The compositions and rigid porous structures of the invention can be used either as catalyst and/or catalyst supports in fluid phase catalytic chemical reactions. Processes for making supported catalyst for selected fluid phase catalytic reactions are also provided. The fluid phase catalytic reactions catalyzed include hydrogenation, hydrodesulfurisation, hydrodenitrogenation, hydrodemetallisation, hydrodeoxigenation, hydrodearomatization, dehydrogenation, hydrogenolysis, isomerization, alkylation, dealkylation and transalkylation.
摘要:
The general area of this invention relates to porous materials made from nanofiber packed beds. More particularly, the invention relates to altering the porosity or packing structure of a nanofiber packed bed structure by blending nanofibers with scaffold particulates having larger dimensions. For example, adding large diameter fibers to a nanotube packed bed to serve as a scaffolding to hold the smaller nanofibers apart and prevent the nanofiber bed structure from collapsing. This increases the average pore size of the mass by changing the pore size distribution and alters the packing structure of the packed bed. The increase in average pore size is caused by the creation of larger channels which improves the flow of liquids or gasses through these materials.
摘要:
In one aspect, a fibril aggregate that includes a multiplicity of carbon fibrils whose longitudinal axis have substantially the same relative orientation, each of the fibrils characterized as having graphitic layers that are substantially parallel to its longitudinal axis and being free of a continuous thermal carbon overcoat and a method for preparing such aggregates. In another aspect, an improved battery (10) having an anode (12), a cathode (14) that includes a chemically reducible material into which is incorporated an amount of electrically conductive carbon microfibers sufficient to enhance the electrical conductivity of the chemically reducible material and an electrolyte. In another aspect, an improved electrochemical cell having a catalytic electrode on which an electrochemical reaction occurs which has incorporated therein carbon microfibers having diameters less than 0.1 micron in an amount sufficient to enhance the electrical conductivity of the electrode.
摘要:
The invention relates to a volume of carbone fibrils that includes a multiplicity of fibrils (10) having a morphology consisting of vermicular tubes that are free of a continuous thermal carbon overcoat and have the graphite layers (12) that are substantially parallel to the fibril axis (16) and a process for preparing such fibrils.
摘要:
The invention relates to a volume of carbone fibrils that includes a multiplicity of fibrils (10) having a morphology consisting of vermicular tubes that are free of a continuous thermal carbon overcoat and have the graphite layers (12) that are substantially parallel to the fibril axis (16) and a process for preparing such fibrils.
摘要:
Graphitic nanotubes, which include tubular fullerenes (commonly called 'buckytubes') and fibrils, which are functionalized by chemical substitution or by adsorption of functional moieties. More specifically the invention relates to graphitic nanotubes which are uniformly or non-uniformly substituted with chemical moieties or upon which certain cyclic compounds are adsorbed and to complex structures comprised of such functionalized nanotubes linked to one another. The invention also relates to methods for introducing functional groups onto the surface of such nanotubes. The invention further relates to uses for functionalized nanotubes.
摘要:
A supported catalyst comprising a carbon fibril aggregate and a catalytically effective amount of a catalyst supported therein, a process for performing a catalytic reaction in fluid phase using the supported catalyst and a process for making the supported catalyst are disclosed.
摘要:
A non-aqueous metal catalyst comprising iron and at least one element chosen from Groups V, VI, or VII, or the lanthanides for preparing carbon fibrils, particularly carbon fibrils having a morphology consisting of vermicular tubes that are free of a continuous thermal carbon overcoat and have graphite layers that are substantially parallel to the fibril axis and a process for preparing such fibrils.
摘要:
A resin compound having superior electrical, mechanical, and molding properties that includes a synthetic resin and carbon fibrils. At least 50 wt% of the fibrils are intertwined to form fibril agglomerates whose diameter is in the range of 0.10-0.25 mm.