38results about How to "Conductivity recovery" patented technology

The invention discloses a preparation method of a hydrogel electrode with high mechanical property and self-healing property, and belongs to the technical field of biological materials. The preparation method comprises the following steps of firstly, preparing a polydopamine-modified conductive nanometer material in a solution; then, adding a water-soluble monomer into the solution; adding an initiator, a crosslinking agent and an additive, and uniformly mixing; initiating and polymerizing by free radicals to form the hydrogel electrode. The prepared hydrogel electrode has the advantages that the good conductive property and mechanical property are realized; under the non-covalent bond action of polydopamine chains, the self-healing capability is good; the conductivity and mechanical property can be healed by self in short time after accidental damaging; the biocompatibility is good, so that the hydrogel electrode is expected to be applied into modern clinical detection and biomedical measurement.

The invention relates to a preparation method of a modified graphene nano filling material and an application of the modified graphene nano filling material in a nylon 6 material. According to the preparation method, through selection of a reducer and a modifier, optimization of process conditions and the like, graphite oxide is partially reduced, electrical conductivity of the graphite oxide is recovered, and then, residual oxygen-containing groups on the surface of a graphene sheet layer are modified, grafted and endowed with special performance. By comparison with a method adopting first grafting and second reduction in the prior art, compatibility of graphene and polymers can be improved while the graphene conductivity is not damaged, and the modified graphene nano filling material has certain inflaming retarding synergy. When the modified graphene nano filling material is applied to nylon 6, the thermal stability of the nylon 6 material can be improved to a certain extent, the conductivity of a graphene/nylon 6 nanocomposite material is improved by about 4 orders of magnitudes by comparison with that of graphite oxide. Therefore, compared with an existing graphene filling material, the modified graphene nano filling material can improve the conductivity of a polymer substrate, and the anti-static function of the polymer material is improved.

The invention discloses a process for preparing graphene by a cryochemical method, belonging to the technical field of chemical synthesis of graphene. The process uses graphene oxide prepared by chemical oxidation as a raw material, and comprises the step of reducing reaction in which graphene oxide is reduced into graphene. The reducing reaction step implements reduction of the graphene oxide at80-150 DEG C by using sodium borohydride as a reducer by the aid of a catalyst, oxygen-containing functional groups (epoxy group, hydroxy group, carboxy group and carbonyl group) on the graphene oxide are removed, and the electric conductivity of the graphene is thoroughly recovered, thereby preparing the graphene. The process disclosed by the invention is suitable for large-scale industrial production. The process has the advantages of low reduction temperature, mild and controllable reaction, thorough reduction, environment friendliness and the like, and is suitable for industrial production.

The invention discloses a preparation method of high-electroconductivity graphene, belonging to the field of nano graphite electroconductive materials. The method comprises the following steps: dispersing low-oxidation-degree graphite oxide in a solvent containing aromatic alcohol to obtain a low-oxidation-degree graphene oxide dispersion solution, and carrying out solvothermal reduction on the dispersion solution to obtain the high-electroconductivity graphene, wherein the mol ratio of oxygen to carbon in the low-oxidation-degree graphene oxide is lower than 1:2, and the low-oxidation-degree graphene oxide does not have any characteristic diffraction peak in an X-ray diffraction pattern. The preparation method disclosed by the invention has the characteristics of high speed, high efficiency and no toxicity. The graphene disclosed by the invention has high electroconductivity, and is applicable to the fields of battery materials, energy storage materials, electronic devices, electroconductive/thermoconductive materials, electromagnetic shielding materials, antistatic materials and the like.

The invention discloses a method for preparing Cu-Cr alloy powder by means of vacuum gas atomization. The method comprises the following steps that 1, a smelting chamber and an atomizing chamber in avacuum atomizing furnace are vacuumized; 2, Cu and Cr are put into a graphite crucible in the smelting chamber, N2 is fed into the smelting chamber to serve as protective gas, the graphite crucible isheated, an alloy solution is obtained, heat preservation is conducted to enable the superheat degree of the alloy solution to reach 50 DEG C to 250 DEG C, and then atomization is prepared and started; and 3, the atomization pressure is adjusted to range from 4 MPa to 6 MPa, the alloy solution obtained in the second step is sprayed into the atomizing chamber through a graphite nozzle, atomizationcrushing is conducted, and then the Cu-Cr alloy powder is obtained. The oxygen content of the obtained powder is lower than 0.08% and much smaller than that of powder obtained through ordinary atmospheric atomization; and in the vacuum gas atomization process, the yield of fine powder smaller than 50 micrometers can reach 60% or above.

The invention discloses a novel high-strength heat-resistant aluminium-alloy conductor. According to the invention, commercial-purity aluminium is used as a raw material, and traces of boron, antimony, manganese, copper and zirconium elements are added at 800+/-10 DEG C. the novel high-strength heat-resistant aluminium-alloy conductor comprises components of, by weight, 0.01-0.30% of boron, 0.05-0.60% of antimony, 0.02-0.80% of manganese, 0.05-2.30% of copper, 0.05-0.90% of zirconium and the balance pure aluminium and unavoidable impurities. The novel high-strength heat-resistant aluminium-alloy conductor is manufactured by a conventional alloy smelting technology. The prepared aluminium-alloy conductor has high strength, good heat resistance and excellent conductivity. Comprehensive performance of the conductor is raised effectively. The aluminium-alloy conductor can be widely applied in national electric transmission lines, especially a long-span long-distance transmission and transformation project.

The invention belongs to the intelligent electronic device technical field and relates to a self-healing stretchable light-emitting device and a preparation method thereof. The method of the inventionincludes the following steps that: a light-emitting active layer having a self-healing function and a transparent electrode are prepared by using transparent self-healing polyurethane elastomer as amatrix material; the light-emitting active layer is made of electroluminescent powder, and the unique dispersion structure of the electroluminescent powder allows the healing of the light-emitting layer to be achieved by the healing of the self-healing matrix; and the electrode is made of an oriented carbon nanotube array, and a pre-stretching method is used to make the electrode material have a wrinkle structure when the electrode is in an un-stretched state, such kind of structure can ensure the stability of the resistance of the device during a stretching process, and the interaction of Vander Waals' forces between carbon nanotubes allow the conductivity of the electrode to be better restored. The maximum brightness of the device can achieve 121.2 cd/m<2>; the maximum stretching quantity of the device can achieve 400%; the stability of the device is excellent when the device is stretched cyclically under 200% of strain; and the device can withstand 10 times of cutting and can be finally healed each time with the brightness of the device not attenuated.

The invention discloses a copper alloy for a high-strength and high-conductivity lead and a preparation method of the copper alloy, belonging to the technical field of copper alloy preparation. The copper alloy for the high-strength and high-conductivity lead is prepared from the following components in percentage by weight: 0.05% of lead, 0.7% of iron, 0.04% of magnesium, 0.4-0.5% of chromium, 0.55-0.70% of zirconium and the balance of copper. The preparation method comprises the following steps: mixing and smelting the above components in percentage by weight, casting ingots, thermal-rolling, performing solid solution, cold-rolling and pickling, thereby obtaining the copper alloy. The conductivity of the copper alloy is 91-95% IACS, the ductility of the copper alloy is 12-20%, and the tensile strength of the copper alloy is 620-655MPa. The requirements on properties of a copper alloy material for leads of the electronic industrial field can be relatively well met, and the alloy copper can be also used in the field of copper alloy materials with high requirements on conductivity and ductility and further has the advantages of simple process and low cost.

The invention relates to the technical field of liquid metal sintering fusion, and particularly relates to a method for inducing liquid fusion sintering of metal micro-nano liquid drops through solvent evaporation. The method comprises the steps of evaporating and drying a liquid metal micro-nano droplet dispersion liquid or a liquid metal micro-nano droplet dispersion liquid containing an auxiliary agent, and realizing sintering fusion by utilizing capillary acting force generated in the evaporation and drying process. The method for sintering the liquid metal micro-nano liquid drops has theadvantages of being easy and convenient to operate, low in cost, capable of being achieved at normal temperature and normal pressure and the like, and can be applied to the fields of circuit packaging, the 3D printing electronic technology, sensors, drivers, electromagnetic shielding and the like.

According to the polymer-metal-MOF-ionic liquid composite alkaline anion exchange membrane and the preparation method thereof, from the perspective of structural design, the mechanical advantages of a polymer, the structural advantages of MOFs and the combined action of multiple materials are integrated, high-alkali-resistance porous MOF serves as a container, an OH-conduction carrier is introduced into holes of the container, and high OH-conduction is achieved; a high-molecular polymer monomer is introduced as a film forming substrate, the mechanical property of the film is regulated and controlled, the defect that the film forming property of an MOF crystalline material is poor is overcome, and the high OH <-> conductivity with the highest OH <-> conductivity reaching 0.122 S/cm is obtained. And the material can realize rapid recovery of OH <-> conduction performance through a simple copper ion soaking method, breaks through the fate that the performance of an alkaline anion exchange membrane is attenuated along with time and is disposable, and is expected to prolong the service life of a fuel cell.

The invention discloses a sludge dewatering container and a dewatering method by adopting the container. The sludge dewatering container comprises an insulating container body, wherein the insulatingcontainer body comprises container side walls, a bottom, a top, and electrode materials respectively arranged at the bottom and the top, the anode material is arranged at the top, and the cathode material is arranged at the bottom; an alkali adding device is further arranged on the insulating container body, wherein the alkali adding device comprises a detection unit used for detecting electric conductivity of sludge and a liquid outlet for supplying a liquid to the electrode material at the top, the supplied liquid of the liquid outlet is controlled by the detection unit, and every time whenthe electric conductivity of the sludge is reduced by a preset value A, the liquid outlet is opened for liquid supply. The alkali adding device is introduced, and the electric conductivity of the sludge is detected through the detection unit; after electroosmosis is carried out for a period of time, the electric conductivity of the sludge is reduced, and then, a bit of an alkaline solution is added to the electrode material at the top for ensuring the electric conductivity of the sludge and the dewatering effect of electroosmosis.

The invention relates to the technical field of lithium ion battery electrode materials, in particular to a NiS/graphene and carbon composite material and a preparation method and application thereof. Nickel sulfide, graphene oxide and a carbon source are compounded, porous carbon is obtained after gel carbonization, the porous carbon has a large specific surface area, and attachment of graphene oxide and nickel sulfide is achieved; the porous carbon has a cross-linked pore structure, and after the porous carbon is compounded with the nickel sulfide, the nickel sulfide is attached to the porous carbon, so that the synergistic effect of the nickel sulfide and the porous carbon is improved, and the conductivity is further improved; the porous carbon is adopted to replace graphene, under the combined action of the reduced graphene oxide, the nickel sulfide and the porous carbon, the conductivity of the electrode material is close to that of a NiS-graphene material, and then the electrode material with excellent conductivity is obtained while the use amount of the graphene is reduced and the cost is saved to a certain extent.

The invention discloses a manufacturing method of an aluminum alloy material special for high-voltage power transmission and transformation. The method involves the following raw materials comprising,by mass, 2%-10% of silicon, 0.1%-1.5% of manganese, 0.1%-0.3% of zirconium, 0.2%-0.6% of copper, 0.1%-1.5% of rare earth alloy, 0.2%-0.6% of graphene and the balance industrial pure aluminum alloy. The method includes the following specific operating steps that first, the industrial pure aluminum alloy is added into a melting furnace for fusion, and the temperature is kept to be 800 DEG C; then the silicon raw material is added into molten aluminum after being ground, stirring is conducted continuously in the adding process, and the temperature is kept to be continuously stirred for 30 minutes after the silicon is added; and afterwards, the temperature is lowered to 780 DEG C. According to the manufacturing method, the internal structure of the aluminum alloy is changed by adding the raremetal and graphene materials; Compared with the prior art, the overall performance of the aluminum alloy material manufactured through the method is remarkably improved, and particularly the electrical conductivity, the heat dissipation performance and the flexibility are remarkably improved.

The invention discloses copper alloy for a guide wire with high conductivity and high elongation and a preparation method of the copper alloy, belonging to the technical field of copper alloy preparation. The copper alloy material for the guide wire comprises the following components in percentage by weight: 0.04-0.06% of lead, 0.6-0.7% of iron, 0.06% of cerium and the balance of copper. The preparation method of the guide wire with high conductivity and high elongation comprises the following steps: mixing and melting the components in percentage by weight, then, ingoting, thermally rolling, performing solid solution treatment, performing cold rolling and pickling to obtain the guide wire with high conductivity and high elongation. The guide wire has conductivity of 97-102% IACS and the elongation of 15-19%. The copper alloy disclosed by the invention can be used for meeting the performance needs of the guide wire in the electronic industrial field on the copper alloy material very well, and also can be used for the field of copper alloy materials with high requirements, high conductivity and high elongation. The copper alloy disclosed by the invention further has the advantages of simple process and low cost.

A method for forming a wire portion of a liquid crystal chromic device. The method includes: a) preparing a liquid crystal chromic device by forming a transparent electrode on a substrate, and forming an alignment film on the transparent electrode; b) forming two or more etching lines spaced apart by a constant interval by irradiating the alignment film with a laser; and c) applying a conductive paste to a valley region of each of the two or more etching lines. The liquid crystal chromic device includes: a substrate; a transparent electrode provided on the substrate; an alignment film provided on the transparent electrode; and two or more etching lines provided on the alignment film. The two or more etching lines are spaced apart by a constant interval, and a valley region of each of the two or more etching lines is coated with a conductive paste.

The invention discloses a protection device capable of detecting and repairing a conductive contact. The protection device comprises a protection cover; a protection cavity is formed in the protectioncover; a contact electric wire is connected into the upper wall of the protection cavity in an up-and-down sliding manner; the upper end of the contact electric wire extends to the upper side of theprotection cover; a base electric wire of which the lower end extends to the lower side of the protection cover is fixedly arranged in the lower wall of the protection cavity; a conductive base is fixedly arranged on the upper end surface of the base electric wire; a connecting cavity with an upward opening is formed in the conductive base; a conductive contact is fixedly arranged on the lower endsurface of the contact electric wire; the conductive contact can enter the connecting cavity; whether the conductive contact works normally or not can be judged according to the current of a circuit,when the current is small, the contact and the base can be automatically separated, then polishing treatment is conducted, an oxide layer is obtained by removing the surface of the contact, and the conductive performance of the contact is recovered.