94 results about "Carbon nanotube yarn" patented technology

A method of fabricating a long carbon nanotube yarn includes the following steps: (1) providing a flat and smooth substrate; (2) depositing a catalyst on the substrate; (3) positioning the substrate with the catalyst in a furnace; (4) heating the furnace to a predetermined temperature; (5) supplying a mixture of carbon containing gas and protecting gas into the furnace; (6) controlling a difference between the local temperature of the catalyst and the furnace temperature to be at least 50° C.; (7) controlling the partial pressure of the carbon containing gas to be less than 0.2; (8) growing a number of carbon nanotubes on the substrate such that a carbon nanotube array is formed on the substrate; and (9) drawing out a bundle of carbon nanotubes from the carbon nanotube array such that a carbon nanotube yarn is formed.

A carbon nanotube yarn includes a number of carbon nanotube yarn strings bound together, and each of the carbon nanotube yarn strings includes a number of carbon nanotube bundles that are joined end to end by van der Waals attractive force, and each of the carbon nanotube bundles includes a number of carbon nanotubes substantially parallel to each other. A method for making the carbon nanotube yarn includes soaking the at least one carbon nanotube yarn string drawn out from a carbon nanotube array in an organic solvent to shrink it and then collecting it.

A cutting mechanism includes electrodes that are utilized to cut or score a non-conductive outer material of a filament or sheet. The electrodes contact a conductive reinforcing material of the filament or sheet to complete an electric circuit. Electric current flows through and heats the conductive material to oxidize or otherwise separate/cut the conductive material and any remaining non-conductive material.

A method for making a carbon nanotube-based device includes the steps of: providing a carbon nanotube yarn; preforming the carbon nanotube yarn into a predetermined shape; and heating the preformed carbon nanotube yarn so as to enable the carbon nanotube yarn to memorize the predetermined shape.

The invention relates to a method for preparing a carbon nano tube fabric electrode and a yarn electrode and application of the electrode, and relates to an electrode preparation method and application of the electrode, and solves the problem that no conventional method can simultaneously prepare a flexible electrode based on an ordinary textile fabric and yarns. The method comprises sensitizing apolyester fiber fabric and a yarn for an ordinary textile with stannous chloride, preparing a fabric/carbon nano tube fabric electrode and a yarn/carbon nano tube yarn electrode, preparing a conductive polymer/fabric/carbon nano tube fabric electrode and a conductive polymer/yarn/carbon nano tube yarn electrode and applying the same to a flexible super capacitor. The method of the invention has the advantages of simple process, low cost and universal applicability. The planar and fiber-type symmetric super capacitors in which the fabric electrode and the yarn electrode are assembled also achieve excellent electrochemical performance.

The invention discloses a three-dimensional pressure sensing fabric with spacer woven structures and a method for preparing the three-dimensional pressure sensing fabric. The three-dimensional pressure sensing fabric comprises upper surface yarn layer and a lower surface yarn layer. The upper surface yarn layer and the lower surface yarn layer are integrally bound with each other by spacing yarns.The method includes weaving the upper surface yarn layer and the lower surface yarn layer by the aid of three-dimensional weaving processes; weaving carbon nano-tube yarns into the upper surface yarnlayer along warp and weft directions and interweaving the carbon nano-tube yarns and the upper surface yarn layer to form conductive networks which are pressure sensing layers; interweaving the uppersurface yarn layer and the lower surface yarn layer with each other by the aid of the spacing yarns to form the three-dimensional pressure sensing fabric which is a three-dimensional spacer sensing fabric. The three-dimensional pressure sensing fabric and the method have the advantages that the three-dimensional pressure sensing fabric with the spacer structures can greatly deform when pressuresare applied to the surfaces of the three-dimensional pressure sensing fabric, the carbon nano-tube yarns in the pressure sensing layers can deform, and accordingly electric resistance can be changed;the three-dimensional pressure sensing fabric is high in sensitivity under the low pressures and is good in recoverability under the high pressures, and the three-dimensional pressure sensing fabric and the method can be widely applied to engineering application and the intelligent wearable field.

The invention relates to a method of producing carbon nano-tube yarn, comprising the following steps: providing a plurality of carbon nano-tube arrays; drawing one carbon nano-tube array to obtain a first carbon nano-tube structure; drawing the other carbon nano-tube array to obtain a second carbon nano-tube structure; contacting one end of the second carbon nano-tube structure with one end of thefirst carbon nano-tube structure, which is close to the carbon nano-tube arrays, along the drawing direction to obtain a lengthened carbon nano-tube tube structure; repeatedly contacting one end of the second carbon nano-tube structure with one end of the first carbon nano-tube structure to further lengthen the carbon nano-tube tube structure; and processing the carbon nano-tube tube with organicsolvent to obtain the carbon nano-tube yarn.

The invention belongs to the capacitor preparation technology field and discloses a preparation method for super capacitor obtained by carbon nanotube yarn compositing cobaltates metallic oxide nanowire. The carbon nanotube yarn composite cobaltates metallic oxide nanowire super capacitor is a one-dimension linear structure, comprising a metal filament, carbon nanotube yarn and cobaltates metallic oxide. The preparation method comprises steps of interwining the metal filament and the carbon nanotube yarn to form an M/CNT dual-strand yarn or a covering yarn structure M-CNT yarn, in which the metal filament is a core and the surface of the core is wrapped by the carbon nanotube yarn, hydrothermally growing cobaltates metallic oxide on the surface of the M/CNT or M-CNT to obtain a composite yarn M/CNT/ACo2O4 or M-CNT-ACo2O4, 3 immersing the M/CNT/ACo2O4 or the M-CNT-ACo2O4 into a polyving akohol-potassium hydroxide collosol to form a film on the surface and then interwining the two composite yarns to obtain a super capacitor. The obtained one-dimension linear super capacitor is high in capacitance, simple in technology and is applicable to weaving a wearable power supply.

A given field emission element includes a carbon nanotube field emission wire and at least one supporting protective layer coating an outer surface of the carbon nanotube field emission wire. The carbon nanotube field emission wire is selected from a group consisting of a carbon nanotube yarn, a wire-shaped CNT-polymer composite, and a wire-shaped CNT-glass composite. A method for manufacturing the described field emission element includes the steps of: (a) providing one carbon nanotube field emission wire; (b) forming one supporting protective layer on an outer surface of the carbon nanotube field emission wire; and (c) cutting the carbon nanotube field emission wire to a predetermined length and treating the carbon nanotube emission wire to form the field emission element.

The invention discloses a preparation method of a carbon nanotube yarn-based flexible supercapacitor composite electrode material, and relates to the technical field of a supercapacitor electrode material. The preparation method comprises the steps of preparing carbon nanotube yarn by a spinning method, combing to prepare a rough product of the electrode material by an electroplating method, heating and purifying the electrode material, preparing graphene ink, performing graphene ink impregnation on the composite material, and finally obtaining a carbon nanotube (CNT)/transient-state metal oxide/graphene (GN) composite electrode material, wherein a transient-state metal oxide attached onto a carbon nanotube comprises Co3O4 nanoparticles, NiO nanoparticles or MnO2 nanoparticles. The preparation method has the characteristics of wide application prospect, excellent electrochemical performance and green and environmental-friendly process and is simple and practical, and promotion and application are easy.

The invention provides a carbon nanotube fabric with a multi-scale pore structure and a preparation method thereof. The carbon nanotube fabric with the multi-scale pore structure is characterized by consisting of carbon nanotube yarns, wherein each carbon nanotube yarn consists of carbon nanotube fiber; the carbon nanotube fiber consists of carbon nanotubes. The built carbon nanotube fabric has the multi-scale pore structure including several nanometers to tens of nanometers of pores between the carbon nanotubes, tens of nanometers to several hundreds of nanometers of pores between the carbon nanotube fiber and several micrometers to tens of micrometers of pores between the carbon nanotube yarns. The carbon nanotube fabric has the advantages of high strength, high flexibility, high electric conductivity, high specific surface area and good transparency, and is hopeful to be used in the fields of composite materials, flexible electronics and the like, such as flexible energy sources and sensing devices.

An infrared detector based on CNT yarns includes a first electrode, a second electrode and a composite film between the first electrode and the second electrode. A first end of the composite film is electrically connected to the first electrode. A second end of the composite film and the second electrode cooperatively define a gap therebetween. The composite film is capable of extending in a direction towards the second electrode and, thereby forming an electrical connection between the first and the second electrodes when the composite film is illuminated by infrared light. The composite film includes a polymer layer, a plurality of semiconducting CNT yarns dispersed in the polymer layer, and a plurality of metallic CNT yarns dispersed in the polymer layer. Each semiconducting CNT yarn includes a plurality of twisted semiconducting CNTs. Each metallic CNT yarn includes a plurality of twisted metallic CNTs.

Exemplary embodiments provide materials and devices for a corona charging. Specifically, carbon nanotube yarns can be used as corona wires (or coronode) in a corotron-type or scorotron-type charging device. The carbon nanotube yarns can provide small diameters, and desired electrical, mechanical and thermal properties. The carbon nanotube yarns can have a diameter of about 100 microns or less for a low operating voltage of the charging device.

A pixel tube for a field-emission illumination/display device includes a sealed container, an anode electrode, a cathode electrode and a shielding electrode. The sealed container has a light permeable portion. The anode electrode is disposed in the sealed container and adjacent to the light permeable portion. The cathode electrode is arranged in the sealed container facing the anode electrode and includes a cathode supporter and a carbon nanotube yarn, the carbon nanotube yarn attached to the cathode supporter and extending toward the anode electrode for emitting electrons therefrom. The shielding electrode is disposed on a surface of the sealed container and surrounds/encircles the carbon nanotube yarn.