31results about How to "Conductivity regulation" patented technology

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 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 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 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.