A process for the production of a carbon nanotube product comprises: introducing sequentially or concurrently a metal catalyst precursor, a source of carbon and a sulphur-containing additive into a continuous flow of a hydrogen-containing carrier gas in a temperature-controlled flow-through reactor; exposing the metal catalyst precursor in the flow of the carrier gas to a first temperature zone sufficient to generate particulate metal catalyst; exposing the catalyst, the source of carbon and the sulphur-containing additive to a second temperature zone downstream from the first temperature zone that can produce a carbon nanotube aggregate; discharging the aggregate as a continuous discharge through a discharge outlet of the reactor; collecting the continuous discharge in the form of a carbon nanotube product; and recycling continuously an exhaust stream of hydrogen by-product exhausted from the outlet to progressively replace the continuous flow. A temperature-controlled flow-through reactor for the production of a carbon nanotube product is also described.
The present invention relates to a method for the production of a carbon nanotube structure which has substantially aligned carbon nanotubes (CNTs) and to a temperature-controlled flow-through reactor.
A process for the production of a carbon nanotube product is described comprising: (a) introducing sequentially or concurrently a metal catalyst precursor, a source of carbon and a sulphur-containing additive into a continuous flow of a hydrogen- containing carrier gas in a temperature-controlled flow-through reactor; (b) exposing the metal catalyst precursor in the flow of the hydrogen-containing carrier gas to a first temperature zone sufficient to generate particulate metal catalyst; (c) exposing the particulate metal catalyst, the source of carbon and the sulphur- containing additive to a second temperature zone downstream from the first temperature zone, wherein the second temperature zone is sufficient to produce a carbon nanotube aggregate; (d) discharging the carbon nanotube aggregate as a continuous discharge through a discharge outlet of the temperature-controlled flow-through reactor; (e) collecting the continuous discharge in the form of a carbon nanotube product; and (f) recycling continuously an exhaust stream of hydrogen by-product exhausted from the discharge outlet into step (a) to progressively replace the continuous flow of the hydrogen-containing carrier gas. A temperature-controlled flow-through reactor for the production of a carbon nanotube product is also described.
The present invention relates to a filter comprising a self-supporting body of non-woven carbon nanotubes useful in the sequestration of an airborne virus.
The present invention relates to an electromagnetic waveguide comprising an electromagnetic interference shielding gasket which includes a self-supporting body of non-woven carbon nanotubes adapted to incorporate one or more apertures and to the electromagnetic interference shielding gasket per se.
The present invention relates to a method for the production of a carbon nanotube structure which has substantially aligned carbon nanotubes (CNTs) and to a temperature-controlled flow-through reactor.
The present invention relates to a filter comprising a self-supporting body of non-woven carbon nanotubes useful in the sequestration of an airborne virus.
The present invention relates to an electromagnetic waveguide comprising an electromagnetic interference shielding gasket which includes a self-supporting body of non-woven carbon nanotubes adapted to incorporate one or more apertures and to the electromagnetic interference shielding gasket per se.
B32B 5/18 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer containing foamed or specifically porous material
H05K 9/00 - Screening of apparatus or components against electric or magnetic fields
9.
Method for the production of carbon nanotube structures
The polymerisation of material contained within and/or added to high temperature reactor produced carbon nanotube fibre wherein the contained material is crosslinked.
Provided is a gas isolation valve which separates reactive materials, principally gases, contained in a high temperature reactor from the surrounding atmosphere. The valve is of modular construction with each module having a gas providing section and a gas removal section. Any number of modules can be provided in series. A central chamber, open at each end gives unimpeded access to the high temperature reactor. It is through the central chamber that the product of the reactor is removed and harvested. In the case of Ilas invention the product is carbon nanotubes.
A method for the preparation of carbon nanotube modified fluids such, that the dispersion of nanotubes in such fluids, exampled by those which are oil based is enhanced through the combined use of mechanical, sonic and ultrasonic devices.
C10M 177/00 - Special methods of preparation of lubricating compositionsChemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
A continuous process whereby carbon nanotubes, usually in the form of an aerogel are harvested from a high temperature reactor by means of an adhesive substrate that is passed across an outlet port at a predetermined rate whereby the carbon nanotube aerogel is fixed and transported away from the reactor and associated apparatus for suitable storage.
A method of increasing the density of carbon nanotube fibres or films containing carbon nanotubes to at least 50% w/w, said method including the steps of exposing the fibre or film to suitable density enhancing agent, or to electromagnetic radiation, or by applying heat, or by mechanical compaction.
D06M 13/00 - Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials with non-macromolecular organic compoundsSuch treatment combined with mechanical treatment
D06M 10/00 - Physical treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents or magnetic fieldsPhysical treatment combined with treatment with chemical compounds or elements
D01F 9/127 - Carbon filamentsApparatus specially adapted for the manufacture thereof by thermal decomposition of hydrocarbon gases or vapours
The present invention relates to the addition of carbonaceous material, advantageously in the form of carbon nanotubes, filled or otherwise and/or carbon nanotube fibres to magnetic substances such that the intrinsic magnetism of the magnetic substances is enhanced. The mixture so produced can, if required be fixed through the addition of suitable fixing mediums such as epoxy resin. The resulting fixed, nanotube enhanced, permanent magnets are suitable for use in applications beyond the scope of non-enhanced permanent magnets.
H01F 1/42 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of organic or organo-metallic materials
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