1333 results about "Benzimidazole" patented technology

The invention relates to a thermoplastic polyimide resin with a block structure and a preparation method thereof, and a polyimide adhesive film and polyimide composite copper foil composed of the thermoplastic polyimide resin with the block structure. The polyimide adhesive film is formed by coating thermoplastic polyimide resin and thermosetting polyimide resin on a polyimide base film and mixing the thermoplastic polyimide resin and the thermosetting polyimide resin. Wherein the thermoplastic resin is composed of a hard segment containing a benzimidazole or amide unit and a soft segment containing a flexible ether bond. The polyimide adhesive film composite copper foil is prepared through rolling, mold pressing and other processing modes. The thermoplastic polyimide resin is of a soluble structure and does not need precursor processing, so that the formation of bubbles is effectively inhibited, and an IPN interpenetrating network structure is formed between the cured thermoplastic resin and thermosetting resin, so that the copper foil has excellent mechanical property, adhesive property and dimensional stability after being compounded; therefore, the method can be applied to the fields of semiconductor packaging, flexible copper-clad plates and the like.

The invention belongs to the technical field of high-temperature-resistant coatings, and particularly relates to a core-shell polyimide-based high-temperature-resistant water-based coating and a preparation method thereof. Comprising the following components in percentage by mass: 35-38% of a core-shell emulsion; the core layer is polyimide resin; the transition layer is an organic silicon emulsion modified by 5, 6-dimethyl benzimidazole and a silane coupling agent KH-550; the shell layer is made of polyamide-imide resin; 28%-32% of a modified high-temperature filler; 6%-7.5% of a functional auxiliary agent; and the balance of deionized water. Through core-shell emulsion gradient design, multi-scale filler cooperation and a low-temperature gradient curing process, the high temperature resistance, the adhesive force and the environmental protection property of the coating are improved.

The invention discloses a production process of antistatic polyamide fiber, and relates to the technical field of textile chemical fiber production, the antistatic polyamide fiber comprises the following raw materials by weight: 30-40 parts of polyethylene glycol terephthalate, 60-70 parts of polyamide, and 3.6-4.8 parts of master batch. The master batch is prepared from the following raw materials in parts by weight: 80 to 90 parts of polyamide, 2 to 4 parts of an antistatic agent, 0.7 to 0.9 part of an anti-ultraviolet agent, 0.7 to 0.9 part of an auxiliary agent, 2.5 to 3.5 parts of a toughening agent and 0.5 to 0.7 part of a dispersing agent. The synthesized antistatic agent contains carbon fibers, a polyether structure, an amide structure and a DOPO structure, so that the antistatic property and flame retardance of the antistatic polyamide fiber are improved. The synthesized anti-ultraviolet agent contains a benzimidazole structure, a sulfydryl ester structure, a hindered phenol structure and an amide structure, so that the ultraviolet aging resistance of the antistatic polyamide fiber is improved.

The invention discloses a self-response odor-removing and sterilizing material, a preparation method thereof and a refrigerator, and belongs to the technical field of refrigerator adsorption materials. Comprising main materials and auxiliary materials, the main body material is composed of an adsorption material and a formaldehyde removal agent; the auxiliary material is composed of a response material and a bactericide; the response material is selected from a covalent organic framework; the bactericide is selected from benzimidazole compounds; the benzimidazole compound shows a deprotonation trend when the pH value is any one value of 2.8-7.1, and is combined with the covalent organic framework through electrostatic attraction; when the pH value is less than 2.8, the benzimidazole compound and the covalent organic framework are protonated at the same time, and the benzimidazole compound is released. The sterilization material is applied to the refrigerator sterilization aspect, and the problems that the sterilization effect is not lasting due to the fact that a common odor-removing sterilization material plays a role to release sterilization substances from the beginning of application, or the sterilization material cannot be actively released, the sterilization effect can be achieved only when bacteria are adsorbed on the surface of the sterilization material, and the bacteria in the air cannot be killed are solved.

The invention discloses a dry-process high-temperature-resistant lithium battery diaphragm and a preparation method thereof, and relates to the technical field of lithium battery diaphragms. The specific preparation method comprises the following steps: activating and cross-linking polypropylene, polyimide, a PP-b-PI block copolymer and a cross-linking agent BIBP under the protection of nitrogen to prepare a polypropylene-polyimide matrix; after melting, adding a pre-sintered ZrO2-coated Al2O3 core-shell filler, hydroxylated boron nitride and zinc borate, and carrying out double-stage screw extrusion, ultrasonic orientation, nitrogen annealing and cold roller quenching to obtain a mixed melt; carrying out warm stretching and hot air circulation heat treatment to prepare a hard elastic crystal base film; carrying out stretching, thermal relaxation and thermal shaping to obtain a microporous base membrane; after slitting, plasma activation is carried out, epoxy silane and tetraethyl orthosilicate / polybenzimidazole aerogel precursors are sprayed, and a nano closed-pore coating is formed through pre-curing and heat shrinkage curing; and finally eliminating static electricity and rolling to obtain a finished product. The lithium battery diaphragm prepared by the invention is excellent in high temperature resistance and low in thermal shrinkage rate.

The invention relates to a process for recycling and regenerating a waste lithium iron phosphate positive electrode material by using a specific chelating agent. The method comprises the following steps: carrying out heat treatment on a waste lithium iron phosphate positive electrode material, putting separated waste lithium iron phosphate powder into a ball milling tank, adding organic acid and a chelating agent, and carrying out ball milling; after the ball milling is finished, adding hydrogen peroxide, uniformly stirring and mixing, adjusting the pH value to 2-3 by using nitric acid, and filtering to obtain a filter cake which is iron phosphate; adding saturated sodium carbonate into the filtrate, precipitating, and recovering lithium carbonate; putting the iron phosphate, the lithium carbonate, the iron source, the lithium source and the phosphorus source in the step S3 into a ball mill for ball milling, and performing high-temperature solid-phase sintering after ball milling to obtain a regenerated lithium iron phosphate material; the chelating agent disclosed by the invention is prepared from (9ci)-2-(2-propenyl)-1-cyclopentene-1-carboxylic acid, 2-mercaptobenzimidazole carboxylic acid, an ethylene boric anhydride pyridine complex and potassium persulfate. The regenerated lithium iron phosphate material prepared by the method has excellent electrochemical performance.

The invention belongs to the field of organic chemical materials, and relates to a benzimidazolyl deep calixarene cross-linked polymer as well as a preparation method and application thereof in iodine adsorption. According to the method, a chlorine foot in a benzimidazolyl calixarene synthesis technology with a chlorine substituted foot is replaced by an azide foot, and then an azide group and 1, 6-heptadiyne are subjected to a click reaction catalyzed by cuprous. And the insoluble benzimidazolyl deep calixarene cross-linked polymer NCCP-I is prepared in a relatively short reaction time and a relatively high yield. The NCCP-I is non-porous, is an amorphous compact particle with an irregular crystal structure, and has relatively high thermal stability. When the NCCP-I is used for adsorbing iodine vapor, the saturated adsorption capacity reaches 1.36 g.g <-1 >. The method is simple in synthesis path, good in reproducibility and good in stability, can be recycled, provides reliable guarantee for nuclear safety protection and environmental governance, and has great social value and economic value.

The invention relates to the technical field of high polymer material and polymer modification, in particular to modified asphalt based on nano material reinforcement and a preparation method, the modified asphalt comprises matrix asphalt subjected to molecular cutting and compounding, a nano titanium dioxide-graphene-carbon nano tube ternary composite material, zwitter-ion and silane synergistically modified nano montmorillonite, the rubber powder subjected to special treatment, the bio-based and traditional compound plasticizer and the 2-mercaptobenzimidazole and sulfur compound stabilizer are synergistically modified. The modified asphalt has the advantages of excellent performance, high-temperature stability, low-temperature crack resistance, strong aging resistance, efficient and environment-friendly preparation process, low energy consumption, short period and good nanometer material dispersion, and adopts the bio-based plasticizer to promote the green development of the asphalt industry.

The invention relates to the field of medicine synthesis, and particularly discloses a preparation method of abesilib and an intermediate thereof. The invention relates to an abesiril intermediate, which is 4-chloro-5-fluoro-2-(methylsulfonyl) pyrimidine (IV) and 4-fluoro-6-(5-fluoro-2-(methylsulfonyl) pyrimidine-4-yl)-1-isopropyl-2-methyl-1H-benzo [d] imidazole (V). The invention further provides a preparation method of the abesiril intermediate. And carrying out nucleophilic substitution reaction on the abesilib intermediate V and 5-[(4-ethyl piperazine-1-yl) methyl] pyridine-2-amine to prepare the abesilib. According to the preparation method, the raw materials are cheap and easy to obtain, the reaction selectivity of functional groups is high, ectopic impurities generated by a halogen atom competition reaction are effectively avoided, meanwhile, introduction of heavy metal palladium can be reduced, and therefore the cost is reduced. The synthetic route is simple, the atom economy is high, the controllability in production is high, and the method is suitable for industrial production.

The invention relates to environment-friendly hydrophobic ink and a preparation method thereof, and belongs to the technical field of water-based ink. A copolymerization modifier capable of being combined in a water-based polyacrylate emulsion in an initiation polymerization mode in the stage of preparing the modified water-based polyacrylate emulsion is prepared, and an o-hydroxy aromatic ketone structure in the copolymerization modifier can endow water-based ink with lasting ultraviolet absorption performance; the trifluoromethyl structure can reduce the surface energy of the water-based ink, and the benzimidazole ring structure can form stable coordinate bonds with metal ions, so that the bonding performance of the water-based ink and a metal substrate is enhanced; when the copolymerization modifier is used for modifying the water-based polyacrylate emulsion, the long-term performance, the hydrophobic and oil-resistant performance and the adhesion performance on the surface of a metal base material of the finished water-based ink can be effectively improved.

The invention provides a high-molecular adsorption material with high selectivity on platinum group metals as well as a preparation method and application of the high-molecular adsorption material, and belongs to the technical field of material science. Comprising the following steps: (1) preparing a methanol solution containing platinum group metal ions, and adding a functional monomer mixture and modified graphene oxide to form a pre-assembled compound; (2) adding a cross-linking agent and an initiator, removing oxygen, and polymerizing to obtain a polymer; and (3) grinding the polymer, eluting metal ions, washing to be neutral, and drying. The high-molecular adsorption material provided by the invention takes modified graphene oxide as a support body, template molecules and specific functional monomers (4-vinylpyridine and 2-mercaptobenzimidazole) are combined to form a pre-assembled compound, then a cross-linking agent and an initiator are added, recognition sites are fixed through cross-linking polymerization, and finally, the high-molecular adsorption material is obtained after the template molecules are eluted. The adsorbent is high in adsorption rate, capable of specifically adsorbing platinum group metal, good in stability and reproducibility and capable of being repeatedly used.

The invention relates to the technical field of layered composite fabrics, in particular to a bio-based antibacterial fiber fabric and a preparation method thereof. The preparation method comprises the following steps: carrying out a reaction on diisocyanate, polyether polyol, bio-based polyester polyol and hexamidine dihydroxyethyl sulfonate in N, N-dimethylacetamide, so as to obtain a polyurethane prepolymer solution; 2-(4-aminophenyl)-5-aminobenzimidazole and amino-modified nano-zinc oxide are sequentially added into the polyurethane prepolymer solution for a reaction, a prepared polyurethane spinning solution is subjected to dry spinning to prepare polyurethane fibers, and then the polyurethane fibers are sequentially spun into yarn and fabric; the bio-based nylon is subjected to melt spinning to obtain bio-based nylon fibers, and the bio-based nylon fibers are sequentially spun into yarns and fabrics; the bio-based antibacterial fiber fabric is prepared by taking a polyurethane fabric as an inner-layer fabric and taking a bio-based chinlon fabric as an outer-layer fabric, and the fabric is good in antibacterial performance and moisture absorption performance.

The invention belongs to the technical field of cables, and particularly relates to a high-temperature-resistant metallurgical vehicle-mounted flexible cable and a preparation method thereof. According to the high-temperature-resistant cable material, polyimide, polyphenylene sulfide and polybenzimidazole are matched, so that the high-temperature-resistant cable material is endowed with extremely high high temperature resistance, can resist the high temperature of 300 DEG C, and is extremely suitable for cable materials for metallurgy. Then, the flexibility of the material is improved by adding a flexible polyether-ether-ketone / nano silicon dioxide compound, and the surface of nano silicon dioxide is treated, so that the loading rate of polyether-ether-ketone can be increased, the phase separation phenomenon of polyether-ether-ketone in a blend is prevented, and uniform dispersion is promoted. And finally, the prepared high-temperature-resistant metallurgical vehicle-mounted flexible cable material is used as a filler and a sheath of the cable material, so that the cable structure is reduced, the production difficulty of the cable is reduced, the production process is simplified, and the material and process requirements are reduced, thereby achieving the purposes of reducing the cost and improving the production efficiency to a certain extent.

Provided herein are 6-carboxylic acids of benzimidazoles and 4-aza-, 5-aza-, and 7-aza-benzimidazoles as GLP-1R agonists, processes to make said compounds, and methods comprising administering said compounds to a mammal in need thereof.

The invention relates to the technical field of aramid fibers, in particular to a heterocyclic aramid fiber and a preparation method thereof.The preparation method comprises the steps that S1, p-phenylenediamine, benzimidazole diamine and terephthaloyl chloride are subjected to a polymerization reaction in an amide solvent, and a polymer stock solution is obtained; s2, the polymer stock solution is subjected to spinning through a spinning nozzle, coagulating bath forming, drafting bath, alkali washing, water bath, drying, hot drafting, oiling and winding into a barrel, and the heterocyclic aramid fiber is obtained. In the step S1, the polymerization reaction temperature is-10 DEG C to 0 DEG C. According to the heterocyclic aramid fiber prepared by the preparation method, the problems of broken filaments, doubled filaments, sticky filaments, broken filaments and the like are obviously improved, the mechanical property is improved, the irregularity is reduced, and the product quality is excellent. The tensile strength of the heterocyclic aramid fiber is 30 to 37 cN / dtex, the elongation at break of the heterocyclic aramid fiber is 3.0 to 4.0 percent, and the elastic modulus of the heterocyclic aramid fiber is 950 to 1150 cN / dtex.

The invention relates to a preparation method of 2-(2-amino-5-bromo-benzoyl) pyridine, which comprises the following steps: by taking 1, 2-diphenyl-1H-benzimidazole (I) as a starting material, oxidizing under the action of chromium trioxide and acetic acid to obtain N-[2-(2-pyridinecarbonyl) phenyl] benzamide (II), hydrolyzing the N-[2-(2-pyridinecarbonyl) phenyl] benzamide (II) under the action of sulfuric acid to obtain 2-(2-aminobenzoyl) pyridine (III), and reacting the 2-(2-amino-5-bromo-benzoyl) pyridine (III) with the 2-(2-amino-5-bromo-benzoyl) pyridine (III) to obtain the 2-(2-amino-5-bromo-benzoyl) pyridine. And (III) performing substitution reaction with NBS in DCM to obtain the target product 2-(2-amino-5-bromo-benzoyl) pyridine. The method has the advantages of mild reaction conditions, higher product purity, high yield, simplicity and convenience in operation, low cost and easiness in industrialization.

The invention discloses a preparation method of a 3-micron ultrathin lithium battery copper foil. The preparation method comprises the following steps: preparing a copper sulfate electrolyte; a wetting agent, a brightening agent and a high resistance agent are added into the copper sulfate electrolyte, the high resistance agent is at least one of thiazolidinethione, polyethyleneimine, 2-mercaptobenzimidazole and ethylene thiourea, and a mixed additive is formed; polishing and grinding a cathode roller by adopting a flying wing wheel, and carrying out electrolytic treatment on the mixed additive through the polished and ground cathode roller to obtain a first-stage copper foil; and the first-stage copper foil is placed in a nitrogen furnace to be subjected to annealing treatment, and the 3-micron ultrathin lithium battery copper foil is obtained. The invention aims to solve the technical problems that in the prior art, edge tearing, foil breaking, warping, dark appearance oxidation and the like are prone to occurring in the production process of the ultrathin copper foil, the tensile strength and the ductility are difficult to consider at the same time, and stable mass production of the 3-micron copper foil is still difficult.

The invention belongs to the field of medicinal chemistry, and particularly discloses a benzimidazole amine derivative, a preparation method thereof and application of the benzimidazole amine derivative as a beta2-adrenergic receptor allosteric antagonist. According to the benzimidazole amine derivative disclosed by the invention, R1 is a hydrogen atom or a bromine atom; r2 is substituted benzoyl, substituted benzyl and the like. Pharmacological results show that the benzimidazole amine derivative disclosed by the invention has relatively good antagonistic activity on beta2AR, and the functional activity of isoprenaline (ISO) can be subjected to negative allosteric regulation.

The present invention relates to a weather-resistant and anti-aging polyethylene pipeline and a preparation method thereof, and belongs to the technical field of polymer materials. The pipeline adopts high-density polyethylene resin, linear low-density polyethylene resin, polyimide resin powder, nano silicon dioxide, nano hexagonal boron nitride, polybenzimidazole fiber, carnosic acid, zinc glycyrrhetinate, antioxidant 1010, hindered amine light stabilizer, polydimethylsiloxane titanate cross-linked polymer, 3-methacryloxypropyl triethoxysilane as raw materials; wherein, polyimide resin powder, carnosic acid and zinc glycyrrhetinate are uniformly mixed, and then modified at 300°C to 350°C for 30min to 60min to obtain a modified product, which can better improve the weather resistance and aging resistance of the pipeline. Each component is compatible with each other, and a special modified preparation method is adopted to better play the synergistic effect of the components, and greatly improve the weather resistance and aging resistance of the polyethylene pipeline.

The invention relates to the field of solder materials, and provides a non-ferrous metal solder for low-temperature brazing and application, the solder is composed of carbon-coated copper nanorods, tin-bismuth alloy-coated silver nanoparticles, 2-mercaptobenzimidazole, rosin resin, an organic active agent, a dispersing agent, ionic liquid, hydroxyethyl cellulose, indium nitrate and citric acid. The silver particles are of a core-shell structure and are coated with tin-bismuth alloy layers, and continuous carbon layers are formed on the surfaces of the copper nanorods, so that the conductivity and the interface stability of the solder are effectively improved. The non-ferrous metal solder with excellent conductivity, low melting point and good wettability is prepared through step-by-step mixing, hot press molding and low-temperature heat treatment processes, and is suitable for electronic device packaging, power device connection and flexible circuit interconnection, and the defects of existing solder in the aspects of low-temperature welding and high conductivity are overcome.

The invention discloses a modified heterocyclic aramid fiber and a preparation method thereof, and belongs to the technical field of high-performance organic fibers. The invention discloses a preparation method of a modified heterocyclic aramid fiber, which comprises the following steps: by taking 2-(4-aminophenyl)-5-aminobenzimidazole, p-phenylenediamine, isophthaloyl chloride and paraphthaloyl chloride as raw materials and LiCl as a catalyst, carrying out polymerization reaction in a solvent to obtain a polymer, and then spinning to obtain the modified heterocyclic aramid fiber. The invention also discloses the modified heterocyclic aramid fiber prepared by the method. According to the invention, m-phthaloyl chloride is creatively used for replacing a part of paraphthaloyl chloride and is subjected to nucleophilic reaction with 2-(4-aminophenyl)-5-aminobenzimidazole and p-phenylenediamine, so that the elongation at break of the fiber can be greatly improved under the condition that the breaking strength and other weather resistance of the original fiber are basically unchanged.

The invention discloses a nanofiber functional dressing for wound healing of burns and scalds, and belongs to the technical field of wound repairing dressings. The dressing is prepared through double-layer electrostatic spinning and comprises a hydrophilic nanofiber layer and a hydrophobic nanofiber layer. The hydrophobic nanofiber layer is prepared by electrostatic spinning of an antibacterial composite modified material and isocyanate-terminated oligomeric lactic acid, and the antibacterial composite modified material is prepared by acylating chlorination of (9I)-2, 4, 8, 10-tetraoxaspiro [5.5] undecane-3, 9-dipropionic acid, reaction of the acylating chlorination product and N, N-bis (2-benzimidazole methyl) amine, and quaternization of benzyl chloride. The tetrooxaspiro rigid structure improves the thermal stability and inhibits the molecular chain from absorbing water and expanding; the quaternized benzimidazole group destroys cell membranes through positive charges, and can efficiently resist bacteria. An amido bond in the hydrophilic layer and a urea bond formed by the antibacterial material and an isocyanate group remarkably improve the liquid absorption capacity; the hydrophobic layer provides mechanical support and ductility; two layers of interfaces are fused through heat treatment, the overall tearing strength is improved, and the joint movement requirement is met.

The invention discloses a benzimidazolyl Gemini surfactant as well as preparation and application of the benzimidazolyl Gemini surfactant. The benzimidazolyl Gemini surfactant is a symmetric gemini type compound formed by a benzimidazole group, a styrene group, a sulfonate group and an alkyl chain with a proper length, and the compound has a better oil displacement effect. The surfactant can also reduce the surface tension of a solution in a dose-dependent manner, has relatively strong interfacial activity, excellent shear restorability and wettability, is beneficial to improving the oil recovery rate, and is suitable for multiple aspects such as an oil-soluble viscosity reducer, an oil-displacing agent and a microemulsion internal phase in tertiary oil recovery. The invention provides a method for preparing a surfactant by sulfonation and neutralization after styryl benzimidazole and alkyl diethylene oxide are subjected to ring-opening reaction to obtain a Gemini intermediate, and the synthetic process route has the characteristics of high product surface activity, excellent rheological property and simple synthetic method.

The invention discloses an anti-yellowing PVB (Polyvinyl Butyral) adhesive for laminated glass and a preparation method thereof, and relates to the technical field of adhesives. The yellowing-resistant PVB glue for the laminated glass has the advantages that the yellowing resistance is high; the modified PVB / nano silicon dioxide composite material is prepared from the following raw materials in parts by weight: 55 to 65 parts of modified PVB resin, 4 to 6 parts of modified nano silicon dioxide, 15 to 20 parts of dioctyl adipate, 0.5 to 1 part of a compound antioxidant, 0.3 to 0.8 part of an ultraviolet absorbent UV-327, 0.2 to 0.5 part of a silane coupling agent KH-560, 0.3 to 0.6 part of ethylene bis stearamide, 0.1 to 0.3 part of 2-benzimidazole methyl carbamate, 3 to 5 parts of tris (1-chloro-2-propyl) phosphate and 0.1 to 0.3 part of nano titanium dioxide. 5 to 8 parts of isopropanol; 0.8 to 1.2 parts of polycarbodiimide. The special modified PVB resin and the nano silicon dioxide are matched with the auxiliary agents such as the compound antioxidant, the anti-yellowing performance of the PVB glue for the laminated glass is remarkably improved through precise process preparation, the components have a synergistic effect, the process is controllable, the product performance is stable, and the cohesiveness is good.

The invention belongs to the technical field of chemical energy, and particularly relates to an ultralow-potential-difference zinc-air battery containing a copper cluster axial coordination iron monatomic catalyst. Benzimidazole and 2-methylimidazole are synthesized into ZIF-7-NH2, the ZIF-7-NH2 reacts with Fe (NO3) 3.9 H2O and Cu (OAc) 2. H2O in an ion exchange mode to obtain FeCu-ZIF-7-NH2, a urea calcination product g-C3N4 is added, stirring is carried out to obtain Fe-ZIF-7-NH2 / g-C3N4, finally, sintering is carried out under argon to obtain g-SAFe-Cin, the ORR activity and the OER activity of the catalyst are remarkably enhanced by constructing the copper cluster axial coordination iron monatomic catalyst, and the catalyst has the advantages of being high in catalytic activity, high in catalytic activity and high in catalytic activity. And the performance of the assembled zinc-air battery in the charge-discharge cycle is improved. Non-noble metal and a low-cost carbon source are used as raw materials, the synthesis cost of the catalyst is reduced, the yield is high, the preparation period is short, and large-scale commercial application potential is achieved.

The invention relates to the field of metal powder material preparation, in particular to silver-coated copper powder with low-temperature sintering activity and a preparation method and application thereof.The preparation method comprises the following steps that copper powder, a reducing agent, a complexing agent composition and a silver plating solution are mixed and react, and the silver-coated copper powder is obtained; the complexing agent composition comprises at least two of ammonia water, triethylene tetramine, ethylenediamine, diethanol amine, benzimidazole, tartaric acid, nitrilotriacetic acid, ethylenediamine tetraacetic acid, disodium ethylene diamine tetraacetate, tetrasodium ethylene diamine tetraacetate and glycine. The preparation method disclosed by the invention is short in process flow, relatively low in cost, capable of keeping good batch stability and easy for industrial production; according to the obtained silver-coated copper powder, under the condition that the silver content is low, the completeness and compactness of a silver layer on the surface of the copper powder are good, the oxidation resistance is high, the service reliability of the silver-coated copper powder is improved, the production cost is saved, and the silver-coated copper powder further has good low-temperature sintering activity.

The invention discloses an application of NSC348884 in preparation of an antibacterial drug, the bacteria of the NSC348884 are gram-negative bacteria or drug-resistant gram-negative bacteria, and the gram-negative bacteria are acinetobacter baumannii, escherichia coli, pseudomonas aeruginosa or klebsiella pneumoniae; based on an antibacterial drug high-throughput screening technology, it is found from 1280 small molecule compounds that the benzimidazole compound NSC348884 has direct bacteriostasis and sterilization effects on gram-negative bacteria and drug-resistant gram-negative bacteria, and no drug resistance is generated after the benzimidazole compound NSC348884 is continuously applied for 14 days. Further research shows that NSC348884 can interfere with lipid synthesis of gram-negative bacterium cell membranes, inhibit formation of biological membranes and induce lipid metabolism disorder, so that bacteriostatic and bactericidal effects are achieved. In addition, the NSC348884 can also enhance the sensitivity of the drug-resistant bacteria to the imipenem and the polymyxin B.

The present invention relates to an organic light emitting device. In particular, the present invention relates to an organic light emitting diode and an organic light emitting device each of which includes at least one emitting material layer comprising an anthracene-based host substituted with at least one deuterium and a boron-based dopant, at least one electron blocking layer comprising an amine-based compound substituted with aryl group, and optionally at least one hole blocking layer comprising at least one of an azine-based compound and a benzimidazole-based compound. The organic light emitting diode and the organic light emitting device has improved luminous efficiency and enhanced luminous lifespan.

The invention discloses a three-phase makeup fixing spray and a preparation method thereof. The three-phase makeup fixing spray comprises an emulsion layer located on the upper layer, a water layer located on the middle layer and a powder layer located on the bottom layer. The emulsion layer comprises acrylic acid (ester) / allyl methacrylate copolymer AMP salt, polyurethane-1, an emulsifier and an oil-soluble sun-screening agent, functional auxiliary materials and ethanol are dissolved in the water layer, the powder layer comprises oil absorption powder, and the mass of water in the three-phase make-up spray accounts for 60%-64% of that of the three-phase make-up spray; the emulsifying agent comprises bis (lauramide glutamine) lysine sodium and a component A, and the component A is selected from one or more of polyglycerol-10 myristate, inulin lauryl carbamate and inulin lauryl carbamate; the sun-screening agent is prepared from ethylhexyl salicylate and phenyl benzimidazole sulfonic acid. The three-phase makeup fixing spray provided by the invention has the three-dimensional integrated makeup fixing effect of oil control, makeup fixing and sun protection.

The invention relates to the technical field of anti-corrosion coatings, in particular to an anti-corrosion composite coating for metal pipeline repair and a preparation method thereof.The anti-corrosion composite coating is composed of a component A and a component B. The component A is prepared from, by mass, 100-120 parts of epoxy resin, 10-30 parts of benzimidazolyl-POSS and 5-10 parts of nano filler fibers; the benzimidazolyl-POSS is prepared by enabling octavinyl POSS (Polyhedral Oligomeric Silsesquioxane) and 5-amino-2-mercapto benzimidazole to react with each other; the component B comprises the following raw materials in parts by weight: 20-100 parts of a curing agent, 1-5 parts of a thixotropic agent and 1-5 parts of a silane coupling agent. According to the invention, 5-amino-2-mercapto benzimidazole is bonded to a POSS skeleton through a mercapto-ene click reaction to form a nano-scale hybrid structure, and the nano-scale hybrid structure is uniformly dispersed in epoxy resin, so that the synergistic interaction of a corrosion inhibition function and physical barrier is realized, and the EIS impedance of an epoxy resin coating is remarkably improved.