30 results about "Carbon nanotube chemistry" patented technology

The invention incorporates new processes for the chemical modification of carbon nanotubes. Such processes involve the derivatization of multi- and single-wall carbon nanotubes, including small diameter (ca. 0.7 nm) single-wall carbon nanotubes, with diazonium species. The method allows the chemical attachment of a variety of organic compounds to the side and ends of carbon nanotubes. These chemically modified nanotubes have applications in polymer composite materials, molecular electronic applications, and sensor devices. The methods of derivatization include electrochemical induced reactions, thermally induced reactions (via in-situ generation of diazonium compounds or pre-formed diazonium compounds), and photochemically induced reactions. The derivatization causes significant changes in the spectroscopic properties of the nanotubes. The estimated degree of functionality is ca. 1 out of every 20 to 30 carbons in a nanotube bearing a functionality moiety. Such electrochemical reduction processes can be adapted to apply site-selective chemical functionalization of nanotubes. Moreover, when modified with suitable chemical groups, the derivatized nanotubes are chemically compatible with a polymer matrix, allowing transfer of the properties of the nanotubes (such as, mechanical strength or electrical conductivity) to the properties of the composite material as a whole. Furthermore, when modified with suitable chemical groups, the groups can be polymerized to form a polymer that includes carbon nanotubes.

The invention provides a method for preparing a battery electrode by directly growing carbon nanotubes on a foamed nickel substrate. The method comprises the following steps of selecting foamed nickel as a catalytic and base material of a chemical vapor deposition reaction of carbon nanotubes, and performing chemical and ultrasonic cleaning on the foamed nickel substrate; setting a CVD reaction apparatus, performing direct chemical vapor deposition growth of the carbon nanotubes on the foamed nickel substrate in the CVD reaction apparatus, wherein when the growth temperature is 600-900 DEG C, the flow ratio of a hydrocarbon gas to a carrier gas is (10-40scmm) to (100-400sccm), the growth pressure is 1-760Torr, and the growth time is 1-30min. The method has the advantages as follows: a remarkable effect is played on improvement of performance of a battery device; the specific surface area and electrochemical activity of the CNT-foamed nickel substrate are greatly improved; and the cycle life of a nickel-metal hydride battery based on the CNT-foamed nickel substrate is highly prolonged.

The invention discloses a method for electroless copper plating of multi-walled carbon nanotubes, which belongs to the technical field of carbon nanotube modification; the invention uses long-time high-energy ultrasonic oscillation to short-cut multi-walled carbon nanotubes to reduce the aspect ratio and open ports; After purification, sensitization, activation, and secondary activation modification, the copper layer is continuously plated on the inner and outer walls of the multi-walled carbon nanotubes with small aspect ratio by using an electroless plating method. The method of the invention is efficient and controllable, effectively reduces the aspect ratio of multi-walled carbon nanotubes, and simultaneously coats the inner and outer walls of multi-walled carbon nanotubes with a copper layer; the plated copper layer has high purity, uniform and continuous coverage, and solves the problem The problem of agglomeration of tubes in the copper matrix, poor wettability, and low interfacial bonding strength provides a better reinforcement for the preparation of high-strength, high-conductivity carbon nanotube-reinforced copper-based composites.

The invention provides a conductive nylon masterbatch of a graphene-carbon nanotube composite structure, which uses nylon as a carrier, and after carbon nanotubes and graphene are grafted and modified, they are connected by chemical bonding to form a composite structure, which is loaded on on a nylon carrier. The conductive nylon masterbatch provided by the present invention first carries out carbon nanotube and graphene surface grafting treatment, and then through the amino group grafted on the carbon nanotube surface and the glycidyl ether oxygen group grafted on the graphene surface Carry out ring-opening reaction, chemically combine graphene and carbon nanotubes, and finally prepare conductive masterbatch. While the carbon nanotube-graphene composite structure is well dispersed in the polymer, the graphene and carbon nanotubes can also be fully overlapped to give full play to the synergistic effect of the two to efficiently build a conductive network. The masterbatch can be blended with various polymers, and the conductive filler in the prepared composite material is evenly distributed, and the conductive performance is obviously improved. Can greatly reduce the amount of carbon nanotubes / graphene.

Using immersion method, magnetron sputtering method or electroplating method prepares catalyst in use for Nano carbon tubes to be developed attached to surface or shallow layer on surface of solid electrode. Then, carbon source are developed to Nano carbon tubes in situ of electrode catalyst attached to. Advantages are: good electrochemistry performance and detection performance of electrode chemical modified by Nano carbon tubes.

Disclosed is a method of manufacturing a conductive coating film having superior chemical resistance or solvent resistance and durability by chemically bonding a resin having an amine group (—NH2) with carbon nanotubes having a carboxyl group (—COOH). The conductive material having high bondability with carbon nanotubes and superior electrical properties includes carbon nanotubes uniformly contained therein, and thus has appropriate surface resistivity, and thereby can be used for antistatic, electrostatic dissipation and electromagnetic shielding purposes and in transparent or opaque electrodes depending on the resistivity value.

The present invention relates to a dendrimer-rare earth complex / carbon nano-tube composite material and a synthesis method thereof. According to the method, a two-step click chemical reaction is adopted to sequentially modify a dendrimer and a plurality of functional groups on the surface of carbon nano-tubes, and then coordination of the functional groups on the surface of the carbon nano-tubes and one or a plurality of types of earth ions is adopted to prepare the dendrimer-rear earth complex / carbon nano-tube composite material. The nanometer composite material has good thermal stability and good dispersity in commonly used organic solvents, wherein rear earth has a certain fluorescence characteristic, such that the material can be widely used in a plurality of fields of absorption, catalysis, imaging, optoelectronic devices and the like.

The invention discloses a three-dimensional netted tin-copper-nickel-carbon nanotube alloy negative electrode and a preparation method thereof. The preparation method of the three-dimensional netted tin-copper-nickel-carbon nanotube alloy negative electrode comprises the following steps: firstly, chemically plating carbon nanotubes with a nickel layer of a certain thickness; secondly, uniformly dispersing nickle-plated CNTs (carbon nanotubes) into a tin-plating solution; thirdly, taking foamy copper as a current collector (a plating substrate), sequentially compositely plating a CU-(CNTs-Ni) composite plating layer with the thickness of 1-3 microns, and plating an Sn-(CNTs-Ni) composite plating layer with the thickness of 0.1-3 Mum; and finally, performing thermal treatment to obtain a three-dimensional composite network alloy electrode. The alloy negative electrode has the first discharge specific capacity of 620mAh / g, and after 200cycles, the specific capacity is attenuated by only 3-5%; the preparation method is simple in process; and the prepared alloy negative electrode is excellent in performance and is applicable to large-scale industrial production.

The invention discloses an electronic cigarette oil-leading rope with carbon nanotube-graphite synergetic enhancement, and a preparation method thereof. The preparation method comprises the following steps of adopting glass fiber as a raw material, using a modified carbon nanotube to modify the glass fiber, and carrying out coupling treatment, so that the carbon nanotube is chemically grafted on the glass fiber to obtain the glass fiber with carbon nanotube enhancement; on the other hand, homogenizing and smashing graphite materials, coupling the surface, and then adding into resin of a polymer to form slurry of the glass fiber; performing blend spinning the glass fiber with carbon nanotube enhancement with graphite-added resin to obtain the glass fiber / polymer composite fiber with carbon nanotube / graphite synergetic enhancement, and interwinding to form the electronic cigarette oil-leading rope. According to the electronic cigarette oil-leading rope provided by the invention, the preparation process is simple and convenient, the problems of poor elasticity, fragility, easiness in breaking, poor abrasion resistance and the like of the traditional oil-leading rope are well solved, meanwhile, the heat transmission capacity is also enhanced, and the phenomenon that an electronic cigarette element is damaged due to dry ashing is avoided.

The invention relates to a device and method for sensing detecting the chemistry molecule through the carbon nanometer tube. The device fits the single wall carbon nanometer tube on the substrate, on end of the tube deposits the base point electrode, deposits the coherent electrode on the place where the distance from the other end of the tube is the coherence length of the tube, the base point electrode and the coherent electrode are connected with the detector through the external electrode set on the substrate or connected directly, the tube has the protective coating while the unsupported is exposed as the sensing probe. The making method is: setting the single wall carbon nanometer tube scatter on the insulated substrate, preparing metal base point electrode in one end, depositing metal coherence electrode and two metal external electrodes whose area is micron size in the other end, and connects with the base point electrode and coherence electrode individually.

The invention incorporates new processes for the chemical modification of carbon nanotubes. Such processes involve the derivatization of multi- and single-wall carbon nanotubes, including small diameter (ca. 0.7 nm) single-wall carbon nanotubes, with diazonium species. The method allows the chemical attachment of a variety of organic compounds to the side and ends of carbon nanotubes. These chemically modified nanotubes have applications in polymer composite materials, molecular electronic applications, and sensor devices. The methods of derivatization include electrochemical induced reactions, thermally induced reactions (via in-situ generation of diazonium compounds or pre-formed diazonium compounds), and photochemically induced reactions. The derivatization causes significant changes in the spectroscopic properties of the nanotubes. The estimated degree of functionality is ca. 1 out of every 20 to 30 carbons in a nanotube bearing a functionality moiety. Such electrochemical reduction processes can be adapted to apply site-selective chemical functionalization of nanotubes. Moreover, when modified with suitable chemical groups, the derivatized nanotubes are chemically compatible with a polymer matrix, allowing transfer of the properties of the nanotubes (such as, mechanical strength or electrical conductivity) to the properties of the composite material as a whole. Furthermore, when modified with suitable chemical groups, the groups can be polymerized to form a polymer that includes carbon nanotubes.

The invention discloses an electronic cigarette oil-leading rope with carbon nanotube interface enhancement, and a preparation method and a product thereof. The preparation method comprises the following steps of adopting glass fiber as a raw material, and using a carbon nanotube modified by mixed acid to modify the glass fiber, so that the carbon nanotube is chemically grafted on the glass fiber; processing through a coupling agent, performing blend spinning with resin to obtain glass fiber / polymer composite fiber with carbon nanotube interface enhancement, and interwinding to form the electronic cigarette oil-leading rope. The glass fiber / polymer composite fiber with carbon nanotube interface enhancement has favorable toughness and heat-transmission capacity, and the preparation process is simple and convenient. The electronic cigarette oil-leading rope provided by the invention not only well solves the problems of poor elasticity, fragility and easiness in breaking of the traditional oil-leading rope, meanwhile, the heat transmission capacity is also enhanced, and the phenomenon that an electronic cigarette element is damaged due to dry ashing is avoided.

The invention discloses a high-thermal-conductivity organic silicon adhesive doped with multiple carbon materials and a preparation method of the adhesive, relates to an organic silicon adhesive and a preparation method thereof, and aims to solve the problem that an existing organic silicon adhesive is lower in heat conductivity coefficient. The adhesive is prepared from silicone rubber, silicone oil, carbon powder, short carbon fiber, carbon nano tubes, a surfactant, a silane coupling agent, an alkynol inhibitor and an organic solvent. The method comprises the steps of 1, weighing the silicone rubber, the silicone oil, the carbon powder, the short carbon fiber, the carbon nano tubes, the surfactant, the silane coupling agent, the alkynol inhibitor and the organic solvent; 2, chemically grafting the carbon nano tubes to the short carbon fiber; 3, performing surface treatment on a thermally conductive filler; 4, mixing the silicone rubber and the silicone oil evenly by an open mill, then adding the thermally conductive filler obtained in step 3 via a three-roller grinder, mixing evenly, and then mixing the silane coupling agent, the alkynol inhibitor and the organic solvent, thus obtaining the high-thermal-conductivity organic silicon adhesive. The method is used for preparing the organic silicon adhesive.