31results about How to "Conductivity regulation" patented technology

The invention discloses general electronic paste based on graphene filler. The electronic paste contains graphene-containing conductive filler, an organic carrier, a solvent and an auxiliary agent. Because the graphene has good electronic conductivity and a unique two-dimensional laminar nano structure, the graphene forms a conductive network in the organic carrier more easily, and the electric conductivity of the electronic paste is improved by adding the graphene. Further, the conductive filler also contains a conductive material with relatively high electric conductivity, so that the electric conductivity of the electronic paste is further improved. Because the graphene and the conductive material are compounded to form the conductive filler, the electronic paste has good electric conductivity. The electronic paste can obtain a relatively wide electric conductivity range by changing the category of the conductive material mixed with the graphene and adjusting the relative proportion of the graphene to the conductive material of different category. The electric conductivity of the electronic paste is 1*10<-3>S / cm to 1*10<3>S / cm. The paste can be widely applied, and can be particularly used as a conductive coating or adhesive.

The invention relates to a two-dimensional transition metal carbon (nitrogen) compound and two-dimensional transition metal sulfide nano-composite powder, and a preparation and application thereof. The nano-composite powder is formed by the uniform scattered recombination of a two-dimensional transition metal carbon (nitrogen) compound nanosheet and a two-dimensional transition metal sulfide nanosheet, wherein the percentage of the mass of the two-dimensional transition metal sulfide to the total mass of the nano-composite powder is 10%-99%. The method comprises the steps: enabling the steady suspension liquid of the two-dimensional transition metal carbon (nitrogen) compound nanosheet and the suspension liquid of the two-dimensional transition metal sulfide nanosheet are mixed according to a proportion; carrying out cooling and drying after supersonic mixing, and then obtaining the nano-composite powder. The nano-composite powder is simple in preparation, is safe and high in efficiency, is low in cost, remarkably irons out the defects of conductivity of the two-dimensional transition metal sulfide, and can regulate the conductivity through proportion change. The nano-composite powder serves as a negative electrode of a lithium ion battery and the electrode material of a supercapacitor, is good in application prospect in the field of energy storage devices, and is better in electrochemical performance than the two-dimensional transition metal sulfide.

The invention provides a layer-by-layer self-assembly composite conductive fiber bundle and a preparation method thereof. The method comprises the following steps that firstly, a fiber bundle is subjected to oxygen plasma pretreatment to finish physical modification of fibers, so that the surface of the fiber bundle has a certain active group; and then, through a layer-by-layer self-assembly method, electropositive substances and electronegative substances are alternately deposited on the surface of the fiber bundle through the combination of electrostatic forces of positive charges and negative charges to form a composite conductive coating, in this way, the layer-by-layer self-assembly composite conductive fiber bundle formed by compositing a fiber bundle body and the composite conductive coating deposited on the fiber bundle body is prepared. The preparation method is simple and controllable, and the conductivity of the composite conductive fiber bundle can be regulated and controlled by controlling the self-assembly time, the number of self-assembly layers and the type and concentration of electropositive / electronegative substances; and the conductive coating of the prepared composite conductive fiber bundle is uniform and compact in structure and excellent in conductivity, and can be widely applied to the fields of wearable electronic devices, energy storage, sensing and the like.

The invention provides an ultrahigh-elasticity wire and a preparation method thereof. The ultrahigh-elasticity wire is in a helical structure, and the ultrahigh-elasticity wire comprises a bottom elastic substrate, flexible conductive fibers adhered to the surface of the bottom elastic substrate and in a helical structure, and a flexible filling substrate embedded in the flexible conductive fibers.

The invention relates to the field of a macromolecular membrane material, in particular to a polymer capable of being used as a crosslinking proton exchange membrane material, and a preparation method and a purpose thereof. The invention provides the polymer, wherein the polymer is sulfonated polyether ether ketone grafted by crosslinking tertiary amine functional groups. The crosslinking proton exchange membrane has low methanol and vanadium ion seeping performance, excellent oxidation stability and high proton conductivity. The preparation method provided by the invention can improve the integral performance of the sulfonated polyether ether ketone resin; in addition, the prepared crosslinking proton exchange membrane cannot generate phenomena of cracking, deformation or stripping in the membrane electrode preparation processing process, so that the stability of a direct methanol fuel battery and an all vanadium flow battery can be ensured.

The invention discloses a graphene crystal film with high conductivity and a preparation method thereof. The graphene crystal film is formed by subjecting an organic polymer containing micro-nano-sized metal catalyst particles to laser irradiation. The mass ratio of the metal catalyst particles to the organic polymer is 1:1 to 1:10000. The micro-nano-sized metal particles induce a conversion process from polymer to graphene, provide a large number of free electrons for the graphene crystal film, and finally achieve extremely high conductivity in combination with the extremely high electron mobility of graphene, thereby improving the quality of the graphene. In addition, the reduction of graphene avoids the oxidation of the metal particles under laser irradiation so that the reaction can becarried out under an air atmosphere and the preparation process of the graphene crystal film is simple and easy. The graphene crystal film prepared by the method has excellent performance, simple operation and easy availability of raw materials, and can meet the requirements of different applications, especially in the field of electronic devices. Thus, the graphene crystal film is convenient forpopularization.

The invention discloses a conductive polymethyl methacrylate composite material and a preparation method of the conductive polymethyl methacrylate composite material. The conductive polymethyl methacrylate composite material is mainly prepared by mixing polymethyl methacrylate, polyaniline and carbon nano tubes in a certain weight ratio. The conductivity of the conductive polymethyl methacrylate composite material can be regulated by changing the content of the added modified carbon nano tubes; the compatibility of the modified carbon nano tubes and the polymethyl methacrylate is good, therefore the combination is firm, dissipation or losing can not be caused by friction and washing, and the durability is excellent; the modified carbon nano tubes are not apt to agglomerate and is dispersed uniformly in the polymethyl methacrylate, therefore the conductivity is remarkable and the conductive polymethyl methacrylate composite material can be used for a long time in low-temperature and low-humidity environment; and the preparation technology of the conductive polymethyl methacrylate composite material is simple and easy to control, and various plastic molding technologies and techniques are suitable to apply.

The invention discloses a chemical synthesis method for polyaniline using ball milling, belonging to the technical field of macromolecular materials, which comprises the following steps: firstly, milling aniline monomers, dopants, and oxidants in a ball mill, initiating polymerization reaction, wherein, the molar ratio of the dopants and the aniline monomers is 0.2 to 2; secondly, washing, separating, and drying the products of the ball milling reaction, obtaining doped state polyaniline after removing oligomeric products and residual reactants; and thirdly, using alkali to detract doping to the doped state polyaniline, obtaining doping-polyaniline. The chemical synthesis method for polyaniline using ball milling has the advantages of easily available materials, wide adaptability, high efficiency, environment-friendly, and easy for mass production.

The invention discloses a polymer-coated carbon nano-tube composite material, a preparation method and applications thereof. The preparation method comprises: carrying out a reaction on a monomer containing an aldehyde functional group and aminated carbon nano-tubes through a Schiff base reaction; adding a proper molar weight of a monomer containing an amino functional group, and preparing a macromolecule polymer coated carbon nano-tube composite material through chemical reaction and hydrogen bond acting force; and applying the prepared composite material in an electrode material, and researching the electrochemical behavior of the macromolecule polymer coated carbon nano-tube composite material.

The invention relates to a large-scale soilless culture nutrient solution management system. The large-scale soilless culture nutrient solution management system comprises a nutrient solution circulating tank, a nutrient solution state detecting device, a nutrient solution state regulating device and a control system and is characterized in that the nutrient solution circulating tank is used for providing a nutrient solution for a soilless culture facility; the nutrient solution state detecting device is mounted in the nutrient solution circulating tank and used for detecting the nutrient solution state in the nutrient solution circulating tank and transmitting the detected value to the control system; the nutrient solution state regulating device is communicated with the nutrient solutioncirculating tank, and the control system controls the nutrient solution regulating device to regulate the nutrient solution state in the nutrient solution circulating tank according to the detected value. The large-scale soilless culture nutrient solution management system has the advantages that by detecting the nutrient solution state in the nutrient solution circulating tank and using the nutrient solution state regulating device to regulate the nutrient solution state, automatic omnibearing management and control of the nutrient solution of the soilless culture system of fruit and vegetables of different varieties can be achieved, and stable and efficient production of the large-scale soilless culture device can be achieved.

The invention provides a preparation method of a graphene-based polymer composite nerve conduit. The preparation method comprises the following steps: (1) preparing graphene oxide: at a first stage, preparing expanded graphite; at a second stage, preparing high-concentration graphene oxide dispersion liquid; (2) preparing printing ink, wherein a sodium alginate solution is printing ink I; an ethylenediamine solution is added into the graphene dispersion liquid to obtain printing ink II; (3) carrying out 3D printing of the rGO catheter: adopting a coaxial bi-material 3D printing needle, enabling the ink I to flow out through a main printing needle of a 3D printer and the ink II to flow out through an auxiliary printing needle, and forming the macroscopic three-dimensional rGO catheter and freeze-drying for standby application; and (4) preparing a graphene-based polymer tube: burning and reducing the rGO conduit, dissolving the polymer in dichloromethane, soaking the rGO conduit in the liquid, fishing out the rGO conduit after soaking for a period of time, and air-drying under natural conditions to complete preparation of the graphene-based polymer composite nerve conduit.

The invention relates to the field of atomizing core ceramics, and particularly discloses a preparation method of a medium-temperature co-fired atomizing core, wherein the preparation method comprises the following steps: step 1, preparing a green body: carrying out injection molding on a porous ceramic injection material to prepare a ceramic green body; step 2, printing oxide printing slurry: printing the oxide printing slurry on the ceramic green body to prepare a green body printed with an electrode, wherein the sintering shrinkage difference range of the oxide printing slurry and the porous ceramic injection material is 0-0.5%; and step 3, co-firing: sintering the green body printed with the electrode prepared in the step 2 at the sintering temperature of 950-1250 DEG C to obtain the atomizing core. The atomizing core can be used in the field of electronic cigarettes or beauty instruments, and since the ceramic green body and the oxide printing slurry form a solid solution layer in the co-firing process, the bonding force between the electrode of the product and the surface of the porous ceramic is good, and the electrode is not prone to falling off.

The invention provides a conductive polyaniline blend fiber and a preparation method and application thereof. The conductive polyaniline blend fiber comprises polyaniline and other polymers, wherein the mass percentage of the polyaniline is 50-80 wt% when the total mass of the conductive polyaniline blend fiber is calculated as 100%; the other polymers are selected from any one or a combination ofat least two of polystyrene, polyacrylonitrile and polyvinylpyrrolidone. The provided conductive polyaniline blend fiber has good mechanical performance when the conductivity can be up to 10<-3> or above.

The invention discloses general electronic paste based on graphene filler. The electronic paste contains graphene-containing conductive filler, an organic carrier, a solvent and an auxiliary agent. Because the graphene has good electronic conductivity and a unique two-dimensional laminar nano structure, the graphene forms a conductive network in the organic carrier more easily, and the electric conductivity of the electronic paste is improved by adding the graphene. Further, the conductive filler also contains a conductive material with relatively high electric conductivity, so that the electric conductivity of the electronic paste is further improved. Because the graphene and the conductive material are compounded to form the conductive filler, the electronic paste has good electric conductivity. The electronic paste can obtain a relatively wide electric conductivity range by changing the category of the conductive material mixed with the graphene and adjusting the relative proportion of the graphene to the conductive material of different category. The electric conductivity of the electronic paste is 1*10<-3>S / cm to 1*10<3>S / cm. The paste can be widely applied, and can be particularly used as a conductive coating or adhesive.

The invention discloses a graphene crystal film with high conductivity and a preparation method thereof. The graphene crystal film is formed by subjecting an organic polymer containing micro-nano-sized metal catalyst particles to laser irradiation. The mass ratio of the metal catalyst particles to the organic polymer is 1:1 to 1:10000. The micro-nano-sized metal particles induce a conversion process from polymer to graphene, provide a large number of free electrons for the graphene crystal film, and finally achieve extremely high conductivity in combination with the extremely high electron mobility of graphene, thereby improving the quality of the graphene. In addition, the reduction of graphene avoids the oxidation of the metal particles under laser irradiation so that the reaction can becarried out under an air atmosphere and the preparation process of the graphene crystal film is simple and easy. The graphene crystal film prepared by the method has excellent performance, simple operation and easy availability of raw materials, and can meet the requirements of different applications, especially in the field of electronic devices. Thus, the graphene crystal film is convenient forpopularization.

The invention relates to a high-content heavy element doped beta-FeSi2-based thermoelectric material and a preparation method thereof. The chemical composition of the beta-FeSi2-based thermoelectric material is Fe1-xMxSi2, M is at least one of Ta, W, Re, Os, Ir and Pt, and x is greater than 0 and less than or equal to 0.50.

The invention belongs to the technical field of ionic liquids, and in particular relates to a photoresponsive ionic liquid capable of dissolving cellulose, a preparation method and application thereof. Under nitrogen protection, 1,3-dichloropropane, acetone, KOH and KI were stirred and refluxed to obtain a mixed solution; 4-hydroxyazobenzene was dissolved in acetone and then added to the mixed solution to continue the stirring reaction; petroleum ether was added and allowed to stand After cooling, precipitate, filter, collect and dry the filter residue to obtain 1-chloro-3-(4-oxygenazobenzene) propane; 1-chloro-3-(4-oxygenazobenzene) propane, 1-methyl ‑1H‑imidazole and ethanol were refluxed under nitrogen protection to obtain a photoresponsive ionic liquid that can dissolve cellulose. The photoresponsive ionic liquid prepared by the invention has photoisomerization and can dissolve cellulose, and its hydrophilicity and hydrophobicity can be adjusted by light to realize the effective separation of the ionic liquid and water, so that the ionic liquid can be easily recycled and reused.

The invention discloses an organic white light-emitting device based on a stepped multi-reaction intersystem crossing process and a preparation method thereof. The light-emitting layer is formed of at least two of MCP, DMAC-DPS, 4CzPNPh and PO-T2T materials The composition of exciplexes, the light-emitting layer has a light-emitting layer structure with a stepwise multi-transverse intersystem crossing process. The anti-intersystem crossing rate of excitons is effectively improved, the utilization rate of excitons is greatly improved, and the fluorescence quantum yield of the device is improved at the same time, which improves the problem of low exciton utilization rate of traditional all-fluorescent devices. The advantages of fluorescence, high anti-system crossing rate, and high fluorescence quantum yield effectively improve the luminous efficiency of white light devices.

The invention discloses a silver nanowire with a core-shell structure and a preparation method and application thereof, the silver nanowire comprises a silver nanowire core layer and a polymer shell layer coating the outer side of the silver nanowire core layer, and the polymer shell layer is doped with silver nanoparticles. According to the preparation method, one-step polyol is blended to serve as a solvent and a reducing agent, and under the condition that PVP and Cl <-> ions exist, silver source reactants are subjected to a liquid-phase reduction reaction to prepare the silver nanowires. The preparation cost is low, the preparation method is simple, the silver nanoparticles doped in the polymer shell layer induce and strengthen the behavior that the conductivity of the nanowire network changes along with the time sequence change of pulse voltage, and the memristive characteristics of double-pulse simplification, nonlinear response, dynamic attenuation and the like are achieved; silver nanoparticles spontaneously doped into the PVP layer in the silver nanowire preparation process are used as'island bridges' for silver migration and diffusion, the nonlinear dynamic attenuation speed can be increased, and the reservoir scale of a reservoir calculation system is increased.

The invention belongs to the technical field of ionic liquids, and particularly relates to a photoresponse ionic liquid capable of dissolving cellulose as well as a preparation method and applicationthereof. The preparation method comprises the following steps: under the protection of nitrogen, stirring and refluxing 1,3-dichloropropane, acetone, KOH and KI to obtain a mixed solution; dissolving4-hydroxyazobenzene into acetone, adding a dissolved solution into the mixed solution, and continuing stirring for reaction; adding petroleum ether, performing standing, cooling, precipitating and filtering, and collecting and drying filter residues to obtain 1-chloro-3-(4-oxyazobenzene) propane; and carrying out reflux reaction on 1-chloro-3-(4-oxyazobenzene) propane, 1-methyl-1H-imidazole and ethanol under the protection of the nitrogen to obtain the photoresponse ionic liquid capable of dissolving cellulose. The photoresponsive ionic liquid prepared by the method has photoisomerization andcan dissolve cellulose, and the hydrophilicity and hydrophobicity of the photoresponsive ionic liquid are regulated and controlled by light so as to realize effective separation of the ionic liquid and water, so that the ionic liquid is easy to recycle.

The invention relates to a transparent self-adhesion conductive hydrogel electrode and a preparation method thereof. The electrode comprises: a protective film layer, a conductive hydrogel layer and abacking layer, wherein the protective film layer, the conductive hydrogel layer and the backing layer are arranged in order from top to bottom, the protective film layer is a polyethylene film, the conductive hydrogel layer is a chemical crosslinking type hydrogel, the chemical crosslinking type hydrogel is obtained by subjecting polyvinyl alcohol and polyvinyl pyrrolidone to a ketal reaction through acid catalysis under a heating condition, the hydrogel is a three-dimensional network structure formed by polyvinyl alcohol and polyvinyl pyrrolidone, and the backing layer is a non-woven fabric.The transparent self-adhesion conductive hydrogel electrode provided by the invention is good in biocompatibility, high in transparency, high in adhesion, simple and convenient in preparation process, low in material cost and suitable for large-scale production.

The invention discloses an organic white light emitting device based on a stepped multi-reflection intersystem crossing process and a preparation method of the organic white light emitting device. A light-emitting layer is composed of an exciplex formed by at least two of MCP, DMAC-DPS, 4CzPNPh and PO-T2T materials, and the light-emitting layer has a light-emitting layer structure in the stepped multi-reflection intersystem crossing process. According to the present invention, the inverse intersystem crossing rate of excitons is effectively improved, the utilization rate of the excitons is greatly improved, at the same time, the fluorescent quantum yield of the device is improved; the problem that the exciton utilization rate of a traditional full-fluorescent device is low is solved, and the organic white light emitting device has the advantages of full fluorescence, high reverse intersystem crossing rate, high fluorescent quantum yield and the like, and the luminous efficiency of thewhite light device is effectively improved.