4572 results about "Polyaniline" patented technology

Conductive polymers having a star structure comprising a central core with multiple attachment sites and conjugated charge transporting arms radiating therefrom. The cores are derived from hyperbranched polymers, dendrimers, or other molecules with a multiplicity of attachment sites. The arms are derived from conjugated oligomers and polymers such as polythiophene, polyaniline or polyphenylene. The subject polymers allow assembly of the macromolecules in all three dimensions in the solid state. A ramification of the compact assembly is the realization of highly reflective, smooth coatings simply applied from solution. A preferred embodiment having a 1,3,5 hyperbranched polyphenylene core and poly (3-hexylthiophene) arms provides lustrous reflective gold coatings.

The invention relates to a preparation method of high-performance water-based anticorrosion paint. The high-performance water-based anticorrosion paint comprises 30-60 parts of inorganic material resin, 0.5-30 parts of polyaniline-based nano composite material, 0-30 parts of curing agent, 0.1-1 part of defoaming agent, 0.1-1 part of dispersant and 0.1-1 part of leveling agent. Since the high-performance water-based anticorrosion paint does not contain organic resin or organic solvent, the paint has the advantages of heat resistance, wear resistance, weather resistance, oil resistance, fire resistance and environmental protection; the paint also has the advantages of simple preparation technique, strong binding force with metal, and low cost, can be cured at normal temperature, and can be widely used for corrosion protection in the fields of aviation, navigation, chemical engineering, electronics and the like.

The present invention includes the preparation of highly conducting conjugated polymers and their use as electrochemical actuators, A typical electrochemical actuator comprises a highly conducting, conjugated polymer for the anode or the cathode, or for both the anode and the cathode; suitable conjugate polymers have a conductivity ≧100 S/cm. The material may have any form, including films and fibers. A preferred shape is a strip or a fiber, where the fiber can be solid or hollow, although any shape may be used. Before use, the material may be treated, for example, by immersion in an acid, in order to dope/protonate the material or to introduce anions or to exchange the anion in the polymer for another anion. Other materials may be incorporated in the polyaniline to increase its conductivity or to provide other benefits, such as increased strength. Useful conducting polymers include monomers of anilines, pyrroles, thiophenes, phenylene vinylenes, and derivatives thereof.

The invention discloses a porous titanium dioxide/graphene composite material and a preparation method thereof. The preparation method comprises the steps of: adding aniline and graphene into a surfactant-containing protonic acid solution according to a certain ratio; preparing a nanometer polyaniline/graphene composite material through an in-situ polymerization method; preparing titanium dioxide sol by using a sol-gel method; adding 0.05-0.20g of nanometer polyaniline/graphene composite material into 50mL of sol, uniformly mixing; standing and aging the sol for 3-5 days; drying in a drying oven at the temperature of 60-120 DEG C; milling; calcining the obtained composite for 30 minutes -2 hours at the temperature of 200-550 DEG C; and removing the polyaniline, thereby obtaining the porous titanium dioxide/graphene composite material. According to the invention, the porous titanium dioxide/graphene is prepared by utilizing the nanometer polyaniline and the titanium dioxide is deposited on the graphene, so that the contact area of the titanium dioxide and pollutants is increased, the separating efficiency of photo-generated electrons and holes is improved and the photocatalytic efficiency is improved.

A transparent electrode that includes a first layer that is interposed between a substrate (e.g., of inorganic glass) and a second layer, is described. The first layer includes a conductive polymer (e.g., a polythiophene), and the second layer includes at least one polymeric anion and at least one of a polyanaline, a substituted polyaniline and a polythiophene represented by the following general formula (I),

in which A may be a C₁-C₅ alkylene radical, R may be a linear or branched C₁-C₁₈ alkyl radical, and x is 0 to 8, provided that when x is greater than 1, each R may be the same or different. Also described is a method of preparing the transparent electrode, and articles of manufacture (e.g., an electroluminescent array) that include the transparent electrode of the present invention.

Compositions are provided comprising aqueous dispersions of polyaniline and colloid-forming polymeric acids. Films from invention compositions are useful as buffer layers, in organic electronic devices including electroluminescent devices, such as organic light emitting diodes (OLED) displays. Films cast from invention compositions are also useful in combination with metal metalwires or carbon nanotubes in applications such as drain, source, or gate electrodes in thin film field effect transistors.

The invention belongs to the technical field of intelligent energy storages, and particularly relates to a super capacitor capable of changing colors and being stretched and a manufacturing method thereof. According to the super capacitor, a carbon nano tube film is evenly laid on an elastic polydimethylsiloxane substrate in a stretched state, polyaniline is electrodeposited on the carbon nano tube film, and the carbon nano tube film serves as one electrode after pull force on polydimethylsiloxane is eliminated; a hole and the surface of a carbon nano tube/polyaniline combination electrode are evenly coated with a layer of polyvinyl alcohol/phosphoric acid gelatinous electrolytes, then the carbon nano tube/polyaniline combination electrode and the other electrode which is made of the same material and has the same structure are assembled, and the intelligent super capacitor capable of being stretched can be obtained. The super capacitor not only has good flexibility and stretchability, but also can display different colors along with different voltages of the two electrodes, different energy storage states can be displayed through color states, and therefore a good application prospect is obtained.

The present invention is directed to the production of nanostructures, e.g., single wall carbon nanotubes (“SWNT”) and/or multi-wall carbon nanotubes (“MWNT”), from solutions containing a polymer, such as polyacrylonitrile (PAN). In particular, the invention is directed to the production of nanostructures, for example, SWNT and/or MWNT, from mixtures, e.g., solutions, containing polyacrylonitrile, polyaniline emeraldine base (PANi) or a salt thereof, an iron salt, e.g., iron chloride, and a solvent. In one embodiment, a mixture containing polyacrylonitrile, polyaniline emeraldine base or a salt thereof, an iron salt, e.g., iron chloride, and a solvent is formed and the mixture is electrospun to form nanofibers. In another embodiment, the electrospun nanofibers are then oxidized, e.g., heated in air, and subsequently pyrolyzed to form carbon nanostructures.

Remarkably, disclosed herein is a solvent-less chemical vapor deposition (CVD) method for the oxidative polymerization and deposition of thin films of electrically-conducting polymers. In a preferred embodiment, the method provides poly-3,4-ethylenedioxythiophene (PEDOT) thin films. In other embodiments, the method is applicable to polymerization to give other conducting polymers, such as polyanilines, polypyrroles, polythiophenes and their derivatives. The all-vapor technique uses a moderate substrate temperature, making it compatible with a range of materials, including as fabric and paper. In addition, this method allows for the coating of high surface-area substrates with fibrous, porous and/or particulate morphologies. The coated substrates may be used in organic semiconductor devices, including organic light-emitting diodes (OLEDs), photovoltaics, electrochromics, and supercapacitors.

A polymer matrix that may coated on an electrode is created by co-crosslinking (1) an adduct of a polyaniline formed by templated oxidative polymerization on a polymer acid; (2) a water-soluble crosslinker; and (3) a redox enzyme. The polymer matrix may be hydrated, and the absorbed water may make it permeable to, for example, glucose. The polyaniline may be polyaniline itself or a substituted polyaniline; the water-soluble crosslinker may be poly(ethylene glycol) diglycidyl ether, and the redox enzyme may be glucose oxidase. The polymer matrix may be produced by co-crosslinking (1) an adduct of an electrically conductive polymer and a polymer acid; (2) a water-soluble crosslinker; and (3) a redox enzyme in a single step at an about neutral pH, curing by drying. After hydration, the crosslinked polymer matrix may form a 3-dimensional glucose-permeable bioelectrocatalyst, catalyzing the electrooxidation of glucose.

A method for producing battery cathodes comprises mixing a cathode active material and a conductive polymer such as polyaniline or poly(ethylenedioxythiophene). The conductive polymers are used in lieu of or in addition to conventional conductive additives and binder materials and significantly reduces or even eliminates the need for such conductive additives or binder materials. The resulting cathodes have a greater weight percentage of the active material and a larger volumetric energy density.

This invention discloses one polyaniline or nanometer oxidation compound film gas sensor array, which comprises more than two compound film micro gas sensor unit integrated into one same base. The invention is characterized by the following: the said compound micro gas sensor unit comprises base slice, cross electrode, the compound film and conductive wires; the compound film has aniline single part, mixture acid liquid, oxidation acid and disperse agent and inorganic oxidation gel or powder.

The invention discloses a preparation method and application of a polyaniline/titanium dioxide/graphene conductive composite membrane. The preparation method comprises the steps of: adding 3-60wt% of titanium dioxide, 0.05-5wt% of graphene and 0.6-10wt% of polyaniline into protonic acid solution, and adopting an in-situ polymerization method to obtain a polyaniline/titanium dioxide/graphene conductive composite; sequentially and evenly coating conductive resin and polyaniline/titanium dioxide/graphene coatings to matrixes such as polypropylene, glass slides, metal plates and the like, wherein each coating is 30-500mu m thick; and drying at 60-80 DEG C to obtain the needed product. According to the preparation method, the titanium dioxide is embedded in a conductive material to prepare the membrane, the defects that the nano TiO2 is not easy to recover and the quantum yield is low can be overcome, the separation efficiency of photoproduction electrons and cavities can be improved, the photoresponse range can be extended, and the photocatalytic efficiency can be improved.

The invention discloses an anode material for a lithium metal battery. The anode material comprises a current collector and a carrier which is in tight fit with the current collector, wherein the carrier has a three-dimensional framework structure; a gap of the three-dimensional framework structure is filled with lithium metal; the carrier is selected from at least one of polymelamine, polyacrylonitrile, polyaniline, polyimide, polyvinylidene fluoride and polytetrafluoroethylene. The anode material disclosed by the invention has the advantages that a nonconductive polymer with the three-dimensional framework structure is used as the carrier, and stable deposition of lithium ions is realized by using interaction of functional groups contained in the carrier and the lithium ions; meanwhile,volumetric expansion is inhibited, internal stress of the battery is relieved, and thereby the aim of inhibiting growth of lithium dendrites is achieved. The coulombic efficiency, the safety of the lithium ion battery obtained by assembling the anode material prepared disclosed by the invention is remarkably improved and cycle life is obviously prolonged.

Electrically conducting polymer compositions are provided. The compositions comprise homopolymers and copolymers of polythiophene, polypyrrole, polyaniline, and polycyclic heteroaromatics, and combinations of those, in admixture with an organic solvent wettable fluorinated acid polymer. The acid polymers are fluorinated or highly fluorinated and have acidic groups including carboxylic acid groups, sulfonic acid groups, sulfonimide groups, phosphoric acid groups, phosphonic acid groups, and combinations thereof. The compositions may be used in organic electronic devices (OLEDs).

The invention discloses a preparation method of a polyaniline and molybdenum disulfide intercalated composite material. The preparation method comprises the steps of preparing suspension of graphene molybdenum disulfide from molybdenum disulfide powder through a chemical intercalation process, adding an aniline monomer, an oxidizing agent and organic acid dopants, and implementing in-situ emulsion polymerization to prepare the polyaniline/molybdenum disulfide intercalated composite material. The preparation method is simple and convenient, controllable and environment-friendly; the material is in emulsion or solid powder, and can be formed by coating, deposition, or pressing powder thereof, and other methods; the material is uniform in texture, stable in performance, and excellent in both photoelectrical performance and thermal stability; and the composite material is applicable to the fields of photoelectronic devices such as a secondary battery, a super-capacitor, an electromagnetic shielding device, an antistatic device, a field effect transistor, a sensor, an organic electroluminescence device and the like.

The present disclosure provides a silicon based composite material, and a preparation method and a use thereof. The silicon based composite material comprises silicon nano-particles and polyaniline coating layers on surfaces of the silicon nano-particles, and Si—C covalent bonds are formed between the silicon nano-particles and the polyaniline coating layers. The silicon based composite material provided by the present disclosure is advantageous in improving the coating effect of polyaniline on silicon particles.

Belonging to the field of composite material preparation, the invention provides a preparation method of a polyaniline/graphene composite material able to disperse in water stably. The material is prepared by the following steps of: 1) reducing graphene oxide to graphene with hydrazine hydrate; 2) dispersing the newly prepared graphene in a solution containing a macromolecular dispersant; 3) then adding aniline for dispersing; 4) at a low temperature, adding a solution of an oxidizing agent and an inorganic acid into the obtained mixed solution dropwisely, and conducting stirring for polymerization; and 5) carrying out centrifugation and washing, thus obtaining the polyaniline/graphene composite material. Due to the auxiliary effect of the macromolecular dispersant, the polyaniline/graphene composite material obtained in the invention can disperse uniformly in water and can be stored stably. And the obtained dispersed solution generates no sediment after 6 months of placement. Thus, the method of the invention solves the problem of difficult processing of a polyaniline/graphene composite material.

The invention discloses a method for preparing polyaniline coating Li-ion battery anode material LiFePO4. The method is coating polyaniline on the in-situ surface of the powder of Li-ion battery anode material LiFePO4. The method has the following favorable effects: the discharging voltage platform of the polyaniline coating anode material LiFePO4obtained is stable, the battery has higher specific capacity up to one hundred and forty point three mAh/g, the granularity is distributed evenly, the grains are in good appearance and high in discharging capacity and long in cycling life, etc.

The invention relates to the technical field of synthesizing of graphene materials and provides a preparation method of nitrogen-doped graphene. The preparation method includes: using an improved Hummers method to prepare continuous large-piece graphene oxide; using a hydrothermal method to prepare the graphene oxide into graphene of a porous three-dimensional structure; ultrasonically dispersing the graphene of the porous three-dimensional structure into an acid solution with the pH being 1-5, adding aniline, well mixing, adding ammonium persulfate, well mixing, and transferring the obtained mixed liquid into a teflon container for hydrothermal reaction so as to obtain a porous three-dimensional graphene-polyaniline compound; performing high-temperature treatment under nitrogen protection to allow polyaniline to decompose out nitrogen sources so as to obtain the nitrogen-doped porous three-dimensional graphene. The method has the advantages that the nitrogen-doped graphene with high nitrogen content can be prepared, the structure of the three-dimensional graphene can be kept, the obtained nitrogen-doped porous three-dimensional graphene is good in electrochemical performance and quite suitable for being used for producing a super capacitor, and the method is convenient to operate and beneficial to industrial popularization.

The invention discloses a preparation method of carbon nano tube/polyaniline netty compound material, which comprises the steps of: A. implementing carboxylation of the carbon nano tube; B. implementing acyl chlorination of the carbon nano tube; C. implementing amidation of the carbon nano tube to obtain the carbon nano tube with positioned graft aniline monomer; and D. implementing electrochemical deposition and aggregation: preparing 200mL of aniline liquor with the concentration of 0.1 to 0.5 mol. L<-1>, adding the aniline liquor into an electrolyte liquor, then adding 0.12g of the mixed liquor of the carbon nano tube obtained in the step C, and then implementing electrochemical deposition to obtain the carbon nano tube/polyaniline netty compound material after nitrogen is introduced infor 30 min. When the carbon nano tube/polyaniline netty compound material prepared by using the method is used as an energy storage material, the specific capacity is large and the circulating stability is good; therefore, the carbon nano tube/polyaniline netty compound material is particularly applicable to preparing the electrode materials of energy storage components such as super capacitors,etc; and the method can easily prepare the carbon nano tube/polyaniline netty compound materials with different thicknesses and different layers.

The invention discloses a polyaniline/ titanium dioxide nanometer composite impedance type thin film gas sensor and a preparation method thereof. The gas sensor comprises a ceramic base body, an interdigital gold electrode and a gas-sensitive thin film. The gas-sensitive thin film is composed of a polyaniline/ titanium self-assembly layer and a polyaniline layer, wherein the polyaniline/ titanium self-assembly layer can greatly improve response sensitivity of the sensor to gas under room temperature, accelerates response and improves stability, and the polyaniline layer can reduce impedance of elements well. The gas sensor has high response sensitivity to ammonia gas under the room temperature, has extremely good responding performance, responds quickly, is good in stability, and can be widely applied to accurate measurement and control of ammonia gas concentration in the industrial and agricultural production process and the atmospheric environment. The invention further provides the method for preparing the gas sensor. The method is simple in process, low in cost and extremely suitable for mass production.