105 results about "Polyaniline composite" patented technology

The invention provides a polyaniline / modified graphene oxide composite material and a preparation method thereof. The preparation method comprises the following steps: dispersing purified graphene oxide, performing ultrasonic treatment, heating, adding a modifier for modification, centrifuging, taking precipitate, freezing, drying and grinding to obtain modified graphene oxide powder; mixing the powder with an aniline solution in doped acid to form a modified graphene oxide / aniline acid solution; dissolving ammonium persulfate in the doped acid to prepare an ammonium persulfate acid solution; and slowly dropwise adding the solution into the solution, carrying out in-situ polymerization, and carrying out suction filtration, washing and drying to obtain the composite material. According to the method, through chemical modification and in-situ polymerization processes, the problems that a single filler is poor in dispersity, a conductive network is discontinuous, and anti-corrosion and anti-static performance is difficult to synergistically improve are solved, and the process is simple and convenient and suitable for industrialization.

The invention relates to the technical field of insulating materials, in particular to insulating powder and a preparation method thereof. The invention discloses a flame-retardant coating which comprises the following components in parts by weight: 15-25 parts of epoxy resin, 10-20 parts of aluminum hydroxide, 5-12 parts of nano boron nitride, 1-3 parts of a silane coupling agent KH-560, 3-8 parts of polytetrafluoroethylene micro powder, 2-6 parts of fluorine-modified montmorillonite, 4-9 parts of melamine cyanurate, 2-5 parts of nano titanium dioxide, 1-4 parts of a fluorine-modified graphene oxide-polyaniline composite material and 0.5-2 parts of pentaerythritol stearate. The anti-corrosion coating is prepared from the following components in parts by weight: 1 to 3 parts of nano zinc oxide, 5 to 10 parts of glass fiber, 2 to 5 parts of polyhedral oligomeric silsesquioxane-polyimide copolymer, 1 to 4 parts of ferrocenyl epoxy resin and 0.5 to 2 parts of perfluorooctyltriethoxysilane. The insulation powder is high in corrosion resistance, excellent in insulation, heat dissipation and mechanical performance, environmentally friendly in processing, good in adaptability, capable of prolonging the service life of equipment and reducing the cost, suitable for special environments and wide in popularization prospect.

The application discloses a kind of carbon nanotube / polyaniline composite modified epoxy resin conductive paint and preparation method thereof, belong to coating technical field.The application is prepared by preliminary disentangling carbon nanotube with specific solvent, and the carbon nanotube dispersion liquid uniformly dispersed is obtained;Afterwards, polyaniline is added to carbon nanotube dispersion liquid, and carbon nanotube / polyaniline composite is prepared by solvent evaporation or purification;Finally, carbon nanotube / polyaniline composite is compounded with epoxy resin, and high-performance carbon nanotube / polyaniline composite modified epoxy resin conductive paint is obtained.The carbon nanotube / polyaniline composite modified epoxy resin conductive paint prepared by the application has more excellent mechanical properties and electrical properties than traditional conductive paint, and can be better applied in aerospace, battery, communication, new energy and other aspects.

The invention discloses a graphene / polyaniline composite film with a gradient structure and a preparation method and application thereof, the preparation method comprises the following steps: S1, preparing a coating template, and uniformly coating the coating template with a graphene oxide dispersion liquid to obtain a graphene oxide porous template; s2, performing electrochemical reduction on the graphene oxide porous template to obtain a reduced graphene oxide porous template; and S3, carrying out polyaniline electrodeposition on the reduced graphene oxide porous template to obtain the graphene / polyaniline composite film with a gradient structure. The graphene / polyaniline composite film prepared by the invention has a gradient structure, and can improve various ion energy storage characteristics and conductivity of the material.

The invention discloses a polyaniline composite flexible electrode material, a preparation method and a supercapacitor, and the preparation method comprises the following steps: introducing sodium sulfonate and cyano into an aniline structure through a two-step method, and obtaining modified aniline; the preparation method comprises the following steps: mixing graphene oxide with 3-aminopropyltriethoxysilane for reaction to obtain modified graphene oxide; then, by taking polyvinyl alcohol as a space stabilizer and a template agent, mediating in-situ polymerization of aniline, modified aniline and modified graphene oxide to obtain a polyaniline derivative prefabricated solution; and then hydrophilic hydrogel is introduced to prepare the polyaniline composite flexible electrode material. The polyaniline composite flexible electrode material provided by the invention is good in cycling stability and excellent in electrochemical performance and mechanical performance, and when the composite flexible electrode material is assembled into a supercapacitor, the specific capacitance value and cycling stability of the supercapacitor can be remarkably improved.

The present invention provides a conductive paste of oligomeric walled nanotubes composite graphene and a preparation method thereof, comprising raw materials in the following mass ratios: 1-4% of oligomeric walled carbon nanotubes, 0.1-0.5% of graphite, 0.5-2% of a dispersion aid, 0.5-1% of a viscosity reducer, 0.1-0.5% of a conductive aid, and the balance being NMP; the dispersion aid includes a polyvinylpyrrolidone with a small molecular weight, a polyvinylpyrrolidone with a large molecular weight, and a polyaniline composite material. By adding graphene, the present invention makes use of the softer characteristics of graphene to enable the oligomeric walled carbon nanotubes to fit more closely with the cathode active material and have a wider contact area, thereby improving the conductivity of the material and the cycle performance, rate performance, etc. of the battery.

The invention belongs to the technical field of all-vanadium redox flow battery diaphragms, and particularly discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyetheretherketone and concentrated sulfuric acid, and carrying out water bath heating reaction to prepare a sulfonated polyetheretherketone solid; molybdenum disulfide and methylbenzene are mixed and subjected to ultrasonic treatment, 1, 3-propane sultone is added, oil bath heating is conducted, and sulfonated molybdenum disulfide powder is prepared; the preparation method comprises the following steps: mixing and stirring sulfonated molybdenum disulfide powder, polyaniline and a DMF (Dimethyl Formamide) solution, performing ultrasonic treatment, adding a sulfonated polyether-ether-ketone solid, stirring to obtain membrane casting slurry, coating a glass plate with the membrane casting slurry, drying to form a membrane, and soaking the membrane in a sulfuric acid solution and deionized water in sequence to obtain the sulfonated polyether-ether-ketone / polyaniline composite membrane. The invention discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The sulfonated polyetheretherketone / polyaniline composite membrane has high proton conductivity, can maintain relatively low vanadium ion permeability and can improve the electrochemical performance of an all-vanadium redox flow battery.

A flexible pH sensor and a measurement system, belonging to the technical field of sensors. Using a material that does not react with an electrolyte, mixed with a metal, an anode substrate is printed, and by means of an electrochemical method, one-step synthesis of a metal-doped polyaniline composite material is implemented. By means of controlling the metal content, the doping amount of metal ions in the polyaniline can be changed. Adding metal increases the conductivity of the anode substrate, which facilitates deposition of polyaniline. The one-step method for preparing a polyaniline composite material is simple, low-cost, and pollution-free; compared with pure polyaniline, the composite material has improved sensitivity. The metal-doped polyaniline composite material is used in a pH sensor for the first time, thus implementing a wide pH measurement range (2-12) and a high bending stability. The flexible pH sensor can be used in saliva pH measurement, and to measure the freshness of fresh food.

The invention belongs to the technical field of asphalt preparation, and provides a high-modulus composite modified asphalt material based on natural asphalt and a preparation method thereof. The method comprises the following steps: separating natural asphalt into a high-molecular asphaltene section and a medium-low-molecular colloid section, and preparing activated asphaltene and colloid sections through alkali treatment and spray drying; a styrene-butadiene-styrene block copolymer and a polyurethane prepolymer are taken as the basis, and a dynamic cross-linked polymer is synthesized through the steps of hydrazide treatment, boric acid group introduction, glutaraldehyde cross-linking and the like; organic modified clay and phenylated chitosan are prepared, a polyaniline composite material is prepared through in-situ polymerization of aniline, a PANI-clay-biomass compound is obtained, the ultraviolet absorption characteristic of polyaniline and the shielding effect of montmorillonite cooperate, the ultraviolet aging resistance of the material is improved, through multi-stage temperature control dispersion, the anti-aging performance of the material is improved, and the anti-aging performance of the material is improved. The various modified materials are compounded with a natural asphalt substrate to obtain the high-modulus composite modified asphalt material based on the natural asphalt.

The invention discloses a preparation method of a functionalized halloysite nanotube / polyaniline composite membrane, which comprises the following steps: ultrasonically dispersing halloysite nanotubes in toluene, adding KH550, reacting, carrying out suction filtration, washing and drying to obtain KH550 modified halloysite nanotubes, and drying to obtain the functionalized halloysite nanotube / polyaniline composite membrane. Then carrying out a ring-opening reaction on epoxy chloropropane and the KH550 modified halloysite nanotube to obtain a functionalized halloysite nanotube containing an imino group, a hydroxyl group and a chlorine group; the preparation method comprises the following steps: carrying out substitution reaction on amino and chlorine, taking a polyamine compound as a cross-linking agent to realize cross-linking among functionalized halloysite nanotubes, carrying out suction filtration to form a film, washing, and drying to obtain a functionalized halloysite nanotube film with the gram weight of not more than 15g / m < 2 >; and performing in-situ polymerization of polyaniline in the functionalized halloysite nanotube film, and performing in-situ crosslinking to obtain the functionalized halloysite nanotube / polyaniline composite film. The adsorption performance of the halloysite nanotubes on heavy metal ions is improved, and the obtained composite membrane is easy to recover.

The invention discloses a gradient polyaniline bionic anti-corrosion coating and a preparation method, and belongs to the technical field of metal surface anti-corrosion materials. A polyaniline composite system with a gradient conductive function is constructed by simulating the space electron transfer characteristic of a sulfur reducing bacteria biological membrane; comprising a low-oxidation-state polyaniline conducting layer, a semi-oxidation-state polyaniline transition layer and a high-oxidation-state polyaniline semiconductor layer which are arranged on the bottom layer, a continuous potential gradient is formed between the layers through oxidation degree differences, and a micro electric field opposite to a natural corrosion potential direction is generated on a metal matrix and a coating interface in an induced mode. A micro electric field formed by the conductive gradient of the coating effectively inhibits spontaneous migration of corrosion electrons, surface oxidation-state components compensate local potential difference through reversible oxidation-reduction reaction, and a bottom high-conductivity layer accelerates charge dissipation in the anode polarization process. The gradient polyaniline coating disclosed by the invention shows double protection effects of cathode protection and physical barrier on a metal substrate in hydrogen sulfide corrosion environments such as oil and gas conveying pipelines and ocean platforms.

The present application belongs to the technical field of anticorrosive paint in steel industry, and particularly relates to a polyaniline nanocomposite for anticorrosive paint and a preparation method thereof, and further relates to a polyaniline composite anticorrosive paint using the polyaniline nanocomposite as filler, and especially relates to a polyaniline composite paint for anticorrosion of general steel using the polyaniline nanocomposite as filler. The polyaniline nanocomposite prepared by the present application can effectively inhibit the agglomeration of graphene nanosheets and polyaniline through in-situ polymerization of polyaniline on the graphene nanosheets, and can form a grid structure in the base material through the lamellar structure of the polyaniline nanocomposite in the coating, further playing an effective barrier role in the diffusion of oxygen, water, chloride ions and the like, so that the coating can play a good shielding role on corrosive gases, and greatly improve the corrosion resistance of the metal surface.

The invention relates to an efficient heat-conducting electromagnetic shielding composite material and a preparation method thereof.The preparation method specifically comprises the steps that APTES is adopted for modifying tetrapod-like ZnO whiskers, the tetrapod-like ZnO whiskers are grafted with graphene oxide through an EDC / NHS system, graphene oxide grafted tetrapod-like ZnO whiskers are obtained, and the dispersity and the heat-conducting property are improved; secondly, preparing a Ti3C2Tx nanosheet by adopting an HF etching method, and introducing amino groups through isocyanate-ethylenediamine modification, so that the chemical stability and the interfacial compatibility are improved; and finally, inducing oxidation polymerization of aniline through FeCl3 to obtain a graphene oxide graft / Ti < 3 > C < 2 > T < x > grafted polyaniline composite material, and constructing a uniform conductive network. The material has high thermal conductivity, high shielding performance, flexibility and stability, and is suitable for high-power electronic devices and flexible shielding materials.

The invention discloses an application of a chiral polylactic acid piezoelectric material doped polyaniline composite friction film in degradation of organic pollutants. The application specifically comprises the following steps: adhering the chiral polylactic acid piezoelectric material doped polyaniline composite friction film to the bottom of a turntable, and adhering a friction bottom sheet to the bottom in a flat-bottom container; the organic pollutant solution is poured into the container, the rotating disc adhered with the friction film is placed in the container for equilibrium adsorption, and one side of the friction film faces upwards; the turntable is turned over to enable one side of the friction film to face downwards to form a friction pair with the friction bottom plate, and the turntable is started to rotate for friction catalysis to realize degradation of organic pollutants. The conductivity of polyaniline is combined with the piezoelectric and chiral characteristics of chiral polylactic acid, a flexible friction film is obtained through a solution casting method, the flexible friction film and a friction bottom form a friction pair, active free radicals are generated through the triboelectric effect, high-concentration organic pollutants are efficiently degraded, and environment-friendly and efficient pollutant degradation at normal temperature and pressure is achieved.

The present invention discloses a method for preparing a polyphenylene sulfide film. The raw materials of the polyphenylene sulfide film include: polyphenylene sulfide resin, phthalate, paraffin wax, 1,4-cyclohexanediol terephthalate, talcum powder, benzophenone, and a metal-organic framework / polyaniline composite; the raw materials are mixed, extruded after melt blending by a twin-screw extruder, and the melting temperature is 290 °C; then, it is cooled and shaped by a chill roll and an electrostatic adsorption device to make the melt into a sheet with high flatness and low crystallinity; the obtained sheet is subjected to biaxial stretching, first longitudinally stretched in the length direction, and then transversely stretched in the width direction. The method of the present invention obtains a polyphenylene sulfide film that simultaneously satisfies a high melting temperature and a high elongation at break.

The application discloses a kind of hydrophobic modified anticorrosive coating and preparation method thereof, the method for preparing hydrophobic modified anticorrosive coating includes: anticorrosive coating is soaked in PDMS homogeneous solution, stationary, solidification, obtains hydrophobic modified anticorrosive coating, the preparation of anticorrosive coating includes: coating is scraped, dry, solidification, obtains anticorrosive coating, wherein, the preparation method of coating includes: g-C3N4 is etched in acidic solution, ultrasonic, obtains etching g-C3N4;Etching g-C3N4, aniline and water are mixed, adjust pH, obtain the polyaniline precursor solution of pH 1~4, polyaniline precursor solution is photopolymerization, obtains second precipitation, washes, freeze-drying, obtains polyaniline composite nanomaterial;Polyaniline composite nanomaterial is dispersed in waterborne epoxy resin, first stirring is then ultrasonic, obtains first solution, first solution and curing agent are mixed to be uniform, obtain coating.The hydrophobic modified anticorrosive coating of the application has the advantages of corrosion resistance, ultraviolet resistance, algae resistance, high hydrophobicity and long service life.

The application provides a conductive adhesive, a preparation method and application thereof. The conductive adhesive is a composite conductive polymer with a three-dimensional interpenetrating network structure formed by blending of a polyaniline-modified carbon nanotube composite material and polyacrylate; the polyaniline-modified carbon nanotube composite material is a composite material with polyaniline in-situ grown on the surface of modified carbon nanotubes, and the modified carbon nanotubes are hydroxylated modified carbon nanotubes. The polyaniline composite material with in-situ growth of the modified carbon nanotubes in the conductive adhesive has excellent conductivity, and the polyacrylate has good adhesion, and the conductive polymer with a three-dimensional interpenetrating network structure formed by blending of the two has the functions of not only more tightly bonding the positive active material together and enhancing the electronic conductivity of the positive active material, but also enhancing the adhesion and conductivity between the positive active material and the current collector and reducing the ohmic resistance of the pole piece.

The application discloses a preparation method of a carbon nanotube / chemical conversion graphene / polyaniline composite film for a flexible solid-state supercapacitor. First, graphene oxide is moderately reduced to prepare chemical conversion graphene (CCG) with partial reduction and high oxidation activity. Then, a three-dimensional network structure is constructed by adding carbon nanotubes (CNT) to the CCG intercalation to obtain a composite material CNT / CCG with a larger specific surface area and more active sites. Polyaniline is introduced into the CNT / CCG composite material through in-situ polymerization to obtain a carbon nanotube / chemical conversion graphene / polyaniline composite film (CNT / CCG / PANi). The electrochemical test results show that the specific capacitance of the CNT / CCG / PANi is 706 mF cm ‑2 at a current density of 0.1 mA cm ‑2 , and the specific capacitance is still 78% of the original value after 3000 cycles at 1 mA cm ‑2 . The energy density of the flexible supercapacitor prepared by using the CNT / CCG / PANi composite electrode material is as high as 245 mW cm ‑2 , and the power density is 124 mWh cm ‑2 . The flexible solid-state supercapacitor with the CNT / CCG / PANi electrode has a potential application prospect as an energy storage device.

The application belongs to the technical field of all-vanadium redox flow battery separators, and specifically discloses a sulfonated polyether ether ketone / polyaniline composite membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyether ether ketone with concentrated sulfuric acid, heating and reacting in a water bath, and preparing sulfonated polyether ether ketone solids; mixing molybdenum disulfide with toluene, ultrasonicating, adding 1,3-propanesultone, and heating in an oil bath to prepare sulfonated molybdenum disulfide powder; mixing the sulfonated molybdenum disulfide powder, polyaniline and a DMF solution, stirring and ultrasonicating, adding sulfonated polyether ether ketone solids, stirring to obtain casting membrane slurry, coating on a glass plate, drying into a film, sequentially immersing in a sulfuric acid solution and deionized water, and obtaining the sulfonated polyether ether ketone / polyaniline composite membrane. The application discloses a sulfonated polyether ether ketone / polyaniline composite membrane as well as a preparation method and application thereof. The sulfonated polyether ether ketone / polyaniline composite membrane has high proton conductivity, can maintain a low vanadium ion permeability, and improves the electrochemical performance of an all-vanadium redox flow battery.

The invention relates to the technical field of gas adsorption materials, in particular to a dissimilar metal-organic framework confinement polyaniline composite adsorbent and a preparation method and application thereof. The preparation method comprises the following steps: adopting chromium-copper dissimilar metal matching, and constructing a stable Lewis acid site in an MIL-101 skeleton; introducing a sulfonic acid group through a ligand exchange strategy, and establishing a Bronsted acid site; and finally, carrying out confinement polymerization on aniline in MOF pore channels to form rich hydrogen bond binding sites so as to obtain the dissimilar metal-organic framework confinement polyaniline composite adsorbent. According to the dissimilar metal-organic framework confined polyaniline composite adsorbent disclosed by the invention, through triple synergistic effects of dissimilar metal Lewis acid sites, sulfonic acid group Bronsted acid sites and polyaniline hydrogen bond sites, a multiple ammonia gas capture mechanism is constructed, and the adsorption efficiency and adsorption effect on ammonia gas are remarkably improved.

The invention belongs to the field of nickel-zinc batteries, and particularly relates to a graphene-based zinc oxide / manganese dioxide-polyaniline composite nickel-zinc battery negative electrode material, a preparation method thereof and a nickel-zinc battery. The graphene-based zinc oxide / manganese dioxide-polyaniline composite nickel-zinc battery negative electrode material comprises a three-dimensional graphene substrate, composite particles loaded on the three-dimensional graphene substrate, and a sulfonated modified polyaniline layer coating the surfaces of the composite particles. The composite particles comprise zinc oxide and manganese dioxide. Through directional coordination of-SO3H groups in the sulfonated polyaniline layer and zinc ions, uniform deposition of the zinc ions on the surface of the electrode is effectively guided, and generation of dendritic crystals is inhibited. In addition, the sulfonated polyaniline layer also has good alkali resistance and conductivity, can still maintain a stable interface environment under a high-temperature condition, effectively inhibits the occurrence of side reactions, and enables the nickel-zinc battery to still maintain high coulombic efficiency under a high-temperature environment of 50 DEG C.

A solid electrolytic capacitor including a porous body containing a valve metal, a dielectric layer formed on a surface of the porous body, and two or more conductive layers covering the dielectric layer, the two or more conductive layers including a first conductive layer formed on a surface of the dielectric layer and a second conductive layer laminated on the first conductive layer, the second conductive layer contains a polyaniline composite in which polyaniline is doped with a proton donor.

The present invention belongs to the technical field of polyaniline synthesis, and specifically relates to a rapid self-polymerizing polyaniline buffer and a rapid self-polymerization method. Aniline monomer is dissolved in a water-soluble salt solvent to prepare a polyaniline precursor buffer, which is allowed to stand for self-polymerization at room temperature, and then self-polymerizes and grows on a substrate to form polyaniline. The beneficial effect of the present invention is that a method for preparing a rapid self-polymerizing polyaniline buffer is developed, which does not require an initiator. The polyaniline prepared by the rapid self-polymerization method has excellent conductivity. This buffer can realize large-scale production to prepare conductive polymer polyaniline powder and form a coating with uniform thickness on the surface of the substrate through coating and impregnation processes, and rapidly polymerizes and grows to form a stable and dense polyaniline composite layer. This rapid self-polymerizing polyaniline buffer will have broad application prospects in the fields of supercapacitor electrode materials, electromagnetic shielding, microwave absorption, and metal anti-corrosion coatings.

The embodiment of the invention provides a polyaniline composite anticorrosive coating based on in-situ polymerization on chitosan and a preparation method. The polyaniline composite anticorrosive coating consists of the following components: chitosan, an aniline monomer, an oxidizing agent, deionized water and an acidifying agent. A multi-layer protection structure is constructed on the metal surface through the adhesiveness, the film-forming property and the slow-release characteristic of the chitosan substrate layer in combination with the conductivity and the corrosion resistance of polyaniline. The chitosan provides good mechanical support and adhesive force, and the durability of the coating is enhanced; and polyaniline provides effective electrochemical protection, so that the anti-corrosion service life of the coating is prolonged. The polyaniline composite coating is polymerized on the chitosan in situ, so that efficient and long-acting metal protection is realized, the environment-friendly requirement is met, and the application potential is wide.

The invention relates to the field of microbial fuel cells, in particular to a polyaniline composite tungsten-based material and a preparation method and application thereof. The preparation method comprises the following steps: putting a tungsten-based material modified carbon paper electrode into an aniline solution, dropwise adding an ammonium persulfate solution, continuously stirring to enable polyaniline to uniformly grow in situ, and drying after reaction to obtain the polyaniline composite tungsten-based semiconductor modified carbon paper. The specific surface area of the electrode is increased by utilizing the polyaniline nanostructure, and charge transfer between microorganisms and the electrode and energy storage of the battery are facilitated. Therefore, a device assembled by using the polyaniline composite tungsten-based semiconductor modified carbon paper composite electrode as an anode has excellent power output, and a promising choice is provided for the anode of a microbial fuel cell.

The invention discloses a core-shell structure zinc cobaltate / polyaniline / sulfur composite nanomaterial, a preparation method thereof and a lithium-sulfur battery, and relates to the technical field of lithium-sulfur batteries. The preparation method comprises the following steps: preparing date-pit-shaped zinc cobaltate by a solvothermal method, generating a layer of polyaniline on the surface of the date-pit-shaped zinc cobaltate by an in-situ free radical polymerization method, and loading a layer of elemental sulfur on the surface of the zinc cobaltate / polyaniline composite nano material by a melting-permeation method to form the three-dimensional zinc cobaltate / polyaniline / sulfur composite nano material with unique morphology. The material improves the conductivity of elemental sulfur, has a porous structure and a large specific surface area, and relieves the problem of volume expansion of sulfur in charging and discharging processes. Active sites exposed on the rough surface of polyaniline have an adsorption effect on lithium polysulfide, capacity loss caused by a shuttle effect is relieved, zinc cobaltate has a catalytic effect on mutual conversion between elemental sulfur and polysulfide, the electrochemical performance of the battery is remarkably improved, the material is applied to the positive electrode of the lithium-sulfur battery, and the electrochemical performance of the battery is improved. The invention has the advantages of good cycle performance and high energy density.

The invention discloses a preparation method of a silicon-carbon polyaniline composite material based on gradient carbon nanotube distribution, which comprises the following steps: designing a multi-layer coating structure with gradient carbon nanotube distribution, and combining the conductivity and flexibility of polyaniline; the gradient carbon nanotube distributed silicon-carbon polyaniline composite material with high capacity, low expansion and excellent cycle stability is provided, the composite material is applied to a high-capacity negative electrode of a lithium ion battery, and the bottleneck problems of low first efficiency and short cycle life caused by volume expansion and poor conductivity of a silicon-based negative electrode are systematically solved.

This invention relates to the field of electrochromic functional thin film preparation technology, and particularly to a Prussian blue / polyaniline composite electrochromic thin film, its preparation method, and its applications. The invention employs a constant current method to deposit a Prussian blue underlayer on the surface of a transparent conductive substrate; the obtained Prussian blue underlayer is pre-activated in a potassium-containing electrolyte; subsequently, a polyaniline surface layer is deposited in a polymerization solution containing aniline monomers and an acidic electrolyte using a segmented constant potential method; and finally, a post-conditioning treatment is performed to obtain the Prussian blue / polyaniline composite electrochromic thin film. By introducing a pre-activation step, a segmented deposition step, and a post-conditioning step, this invention improves the interfacial bonding, ion transport, and surface uniformity of the composite film, reducing agglomeration and scattering losses caused by continuous overgrowth of polyaniline. This results in a composite film with fast response, high transmittance adjustment capability, and good cycling stability, making it suitable for electrochromic display devices, smart windows, and transmittance-adjustable optical devices.

The present application discloses a nano-modified polyaniline composite material for a power grounding electrode and its preparation process, which relates to the field of conductive polymer materials. It includes nano-modified polyaniline material, low-density polyethylene, styrene-butadiene thermoplastic elastomer and additives. The weight ratio of the nano-modified polyaniline material, low-density polyethylene, styrene-butadiene thermoplastic elastomer and additives is (4-5):(10-11):(3-4):(1-2). In the preparation process of the conductive composite polymer of the present application, the reinforcing filler and the modified fiber are uniformly dispersed with the nano-modified polyaniline material along with stirring, and the three play a role of mutual filling, so that the mechanical properties of the conductive composite polymer are improved.

The invention relates to a preparation method of a three-dimensional ordered macroporous metal oxide / polyaniline composite gas sensing material, which comprises the following steps: preparing polystyrene (PS) microspheres by adopting an emulsion polymerization method, cleaning a glass substrate by using a piranha solution, preparing an opal photonic crystal template by adopting a heating convection self-assembly method, and preparing the three-dimensional ordered macroporous metal oxide / polyaniline composite gas sensing material. The preparation method comprises the following steps: preparing a precursor solution by a sol-gel method, filling the obtained opal photonic crystal template with the precursor solution, filling the opal photonic crystal template with the precursor solution in a manual dropwise adding manner to obtain a template / precursor compound, placing the template / precursor compound in a muffle furnace, and carrying out heat preservation for 2-4 hours to obtain the opal photonic crystal template. Calcining and annealing at high temperature to remove the polystyrene colloidal microsphere template to obtain a three-dimensional ordered macroporous metal oxide material; in a word, the catalyst has the advantages of simple preparation method, low preparation cost, good long-term stability, high selectivity and high response to nitrogen dioxide at low working temperature.