15 results about "Bisbenzimidazole" patented technology

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 relates to the technical field of brass materials, in particular to a high-strength and high-toughness brass material and a preparation method thereof.The preparation method comprises the steps that a porous oxide film layer is prefabricated on the surface of brass through plasma electrolytic oxidation, and an oxide film layer doped with double-bond silver-loaded graphene oxide is constructed on the surface of the brass; the preparation method comprises the following steps: firstly, preparing modified MXene, then preparing a photocurable hole sealing coating for hole sealing treatment, introducing double-bond silver-loaded graphene oxide and the modified MXene as fillers into the photocurable hole sealing coating, firstly performing sulfhydrylation on the MXene by using 3-mercaptopropyltriethoxysilane, and then grafting a double-bond-containing bis-benzimidazole ring derivative through light click to obtain the modified MXene; vinyl-terminated polyurethane is used as a cross-linking agent, o-phenyl phenoxyethyl acrylate, butyl acrylate, glycidyl methacrylate and octadecyl acrylate are compounded to serve as an acrylic monomer, a diluent and a solvent are introduced, a complex cross-linked network is constructed, and the service life of the brass material is prolonged.

The invention discloses melamine glazing powder and a preparation method thereof, and belongs to the technical field of melamine glazing resin. The method is used for solving the technical problems that in the prior art, a melamine glazing powder synthesis process is poor in surface brightness and smoothness and is not resistant to high temperature. The preparation method of the melamine glazing powder comprises the following steps: uniformly mixing and ball-milling a primary material, a lubricant, a curing agent, hybrid resin and poly-2, 2 '-(m-phenyl)-5, 5'-bis-benzimidazole to prepare the melamine glazing powder. Wherein methyl acrylate and divinylbenzene are subjected to suspension copolymerization to synthesize a suspension copolymer; 4-chloromethylstyrene is cross-linked with the suspension copolymer, and composite resin is prepared; and hydrolyzing tetraethyl orthosilicate in the composite resin to prepare the hybrid resin. When melamine and formaldehyde are subjected to polycondensation, p-toluenesulfonamide is adopted for modification, so that the smoothness and the brightness value of the prepared melamine glazing powder are improved. The melamine glazing powder prepared by the invention has the advantages of high surface brightness and smoothness and high temperature resistance.

The present invention discloses the preparation and application of a cheap metal-organic fluorescent material for high-power LED lighting. The chemical formula of the complex is: [Cu₄I₄(bbimb)₂]ₙ, where the ligand bbimb is 1,2-bis((1H-benzoimidazol-1-yl)methyl)benzene, and its chemical formula is: C₂₂H₁₈N₄; the complex crystal belongs to the monoclinic system, the space group of the complex is P21 / c, and the crystal parameters of the complex are a = 11.3850(3) Å, b = 16.1962(3) Å, c = 26.8795(6) Å, α = 90°, β = 98.879(2)°, γ = 90°, Z = 4, V = 4897.02(19) ų. The present invention also provides a preparation method of the complex, which is simple, has good stability and high yield. The obtained complex shows orange fluorescence emission under the irradiation of a 365 nm ultraviolet lamp. And a large temperature range of zero thermal quenching occurs in the temperature range from 80 K to 500 K, and its fluorescence intensity hardly quenches with the increase of temperature, having broad application prospects in the field of ZTQ materials. Moreover, the optical properties of the LED assembled with the complex as the material are studied, and the LED shows good white light emission performance under high-throughput current.

The application discloses a water-soluble anion-modified square plate type platinum (II) complex electrochemiluminescence material and a preparation method and application thereof. 2,6-bis(benzimidazole) pyridine is reacted with 1,3-propanesulfonic acid lactone in a DMSO solution to obtain a ligand L1, and then the ligand L1 is reacted with potassium chloroplatinite under a nitrogen atmosphere to obtain a platinum complex. The square plate type platinum (II) complex has been verified to have excellent photophysical properties, and is introduced into the electrochemiluminescence field for the first time. By comparing the electrochemiluminescence performance of a commercial Ru(bpy)3 2+ system under the same concentration, the cathode electrochemiluminescence of the material is about 35 times stronger than that of the Ru(bpy)3 2+ system under the dispersed state test condition; the anode electrochemiluminescence of the material is about 10 times stronger than that of the Ru(bpy)3 2+ system under the non-homogeneous aggregation state test condition; the cathode electrochemiluminescence of the material is about 16 times stronger than that of the Ru(bpy)3 2+ system.

This invention relates to the field of brass material technology, specifically a high-strength, high-toughness brass material and its preparation method. A porous oxide film is pre-formed on the brass surface through plasma electrolytic oxidation. A double-bonded silver-loaded graphene oxide-doped oxide film is then constructed on the brass surface. A photocurable sealing coating is then prepared for sealing. In the photocurable sealing coating, double-bonded silver-loaded graphene oxide and modified MXene are introduced as fillers. MXene is first thiolated with 3-mercaptopropyltriethoxysilane, and then grafted with a double-bonded dibenzimidazole ring derivative via photo-clicking to obtain modified MXene. A vinyl-terminated polyurethane is used as a crosslinking agent, and a complex crosslinking network is constructed using a blend of o-phenylphenoxyethyl acrylate, butyl acrylate, glycidyl methacrylate, and octadecyl acrylate as acrylic monomers. A diluent and solvent are introduced to extend the service life of the brass material.

The application discloses a chemical structural formula of a biphenyl sulfonamide compound of a bis-benzimidazole, and also discloses application of the compound in preparation of a pharmaceutically acceptable salt or solvate, application of the compound and the pharmaceutically acceptable salt or solvate in preparation of a medicine for treating endothelin-dependent or angiotensin II-dependent diseases. Meanwhile, the biphenyl sulfonamide compound of the bis-benzimidazole can also be used in combination by changing substituted functional groups. The biphenyl sulfonamide compound of the bis-benzimidazole, the prepared pharmaceutically acceptable salt or solvate and the medicine prepared by the compound have pharmacological activities, and have pharmacological effects in animals including human beings, and are particularly useful in treatment or prevention of IgA nephropathy, focal segmental glomerulosclerosis, nephrotic syndrome, chronic kidney disease, diabetic nephropathy, hypertension, coronary heart disease and myocardial infarction.

A method for preparing organometallic complexes Zn-L based on amidated bisbenzimidazole groups, this invention relates to a method for preparing organometallic complexes Zn-L, using Zn 2+ Using a central ion and amidated bisbenzimidazole as a ligand, a zero-dimensional zinc metal complex (Zn-L) was synthesized via a solvothermal method. The prepared fluorescent probe exhibited excellent selectivity and sensitivity for fluoroquinolone antibiotics, and the hierarchical clustering analysis (HCA) platform enabled accurate identification of structurally similar fungible quantifiers (FQs). Compared to other fluorescent probes for detecting Ofloxacin, it had a similar or lower limit of detection (LOD). The detection limit of this fluorescent probe for Ofloxacin reached LOD = 0.0514 μM, indicating that the Zn-L complex is a fluorescent sensor with excellent application value for the rapid detection of fluoroquinolone drugs.

The application discloses a kind of nanofiber functional dressings for burn and scald wound healing, belong to the technical field of wound repair dressings.The dressing is prepared by double-layer electrospinning, comprising hydrophilic nanofiber layer and hydrophobic nanofiber layer.The hydrophobic nanofiber layer is prepared by electrospinning of antibacterial composite modified material and isocyanate-terminated oligomeric lactic acid, and the antibacterial composite modified material is prepared by reacting (9CI)-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-dipropionic acid after acyl chloride with N,N-bis(2-benzimidazole methyl)amine, and then by quaternary ammonium chloride reaction.The rigid structure of tetraoxaspiro ring improves thermal stability and inhibits molecular chain water swelling;Quaternary ammonium benzimidazole group can efficiently resist bacteria by destroying cell membrane through positive charge.The urea bond formed by amide bond in hydrophilic layer and isocyanate group of antibacterial material significantly improves the liquid absorption capacity;The hydrophobic layer provides mechanical support and ductility;Heat treatment makes the interface of two layers fuse, and the overall tear strength is improved, which meets the demand of joint activity.

The invention discloses a preparation method and application of modified hyperbranched polyurethane for finish paint in the field of rail transit, and the modified hyperbranched polyurethane is prepared from the following raw materials: 2, 2-dimethylolpropionic acid, dicyclohexylmethane-4, 4 '-diisocyanate, a modified chain extender and a catalyst, modified hyperbranched polyurethane containing a bis-benzimidazole structure and curcumin and a phosphorus-nitrogen six-membered ring functional agent A containing a large number of hindered phenol structures are prepared to participate in preparation of the finish paint for rail transit, so that the finish paint is endowed with excellent ultraviolet aging resistance, thermal aging resistance and mechanical properties, and meanwhile, the finish paint also has a flame-retardant effect.

The invention belongs to the technical field of battery materials, and particularly relates to a sodium ion battery composite reference electrode and a preparation method and application thereof. The sodium ion battery composite reference electrode provided by the invention comprises a conductive substrate, a first active coating and a second non-conductive coating, the first active coating coats the surface of the conductive base material; the second non-conductive coating coats the surface of the first active coating; the second non-conductive coating comprises a polybenzimidazole polymer; the polybenzimidazole polymer comprises at least one of poly [2, 2 '-(m-phenylene)-5, 5'-bis-benzimidazole], poly [2, 2 '-(p-phenylene)-5, 5'-bis-benzimidazole] and poly (2, 5-benzimidazole). The sodium-ion battery composite reference electrode provided by the invention is applied to a sodium-ion battery without adding an additional diaphragm, and meanwhile, the tested cathode potential is smaller than the real potential deviation, so that the stability of the reference electrode can be improved, and the stable service life can be prolonged.

The invention discloses a high-temperature and high-acid stable heavy metal chelating agent as well as a preparation method and application thereof, and belongs to the field of industrial wastewater treatment. The preparation method comprises the following steps: condensing 2, 6-diaminopyridine and o-phenylenediamine which are used as raw materials to obtain 2, 6-bis (benzimidazole-2-yl) pyridine; nitration and reduction are carried out, and amino groups are introduced; carrying out amidation reaction on the amination intermediate and 2-mercaptobenzothiazole-5-carboxylic acid, and introducing a thiol group; and carrying out nucleophilic substitution reaction on the obtained intermediate and bromohexadecane, and grafting a hydrophobic long chain to finally prepare the target chelating agent. Molecules of the chelating agent integrate a rigid heterocyclic ring, a thiol ligand and a hydrophobic chain, so that the chelating agent not only can efficiently and selectively chelate heavy metal ions under the conditions of high temperature and strong acid, but also can spontaneously gather after chelating and quickly settle through gravity to realize efficient solid-liquid separation, and has a wide application prospect.

The application provides a porous organometallic palladium polymer applied to selective hydrogenation of terminal alkynyl propanol, a preparation method and application thereof. The porous organometallic palladium polymer comprises a reaction product of a palladium-based metal organic compound, a comonomer and a crosslinking agent, and the palladium-based metal organic compound is selected from one of bisbenzimidazole nitrogen heterocyclic carbene palladium chloride, bis-triphenylphosphine palladium chloride or tetra-triphenylphosphine palladium. The porous organometallic palladium polymer of the application has the advantages of homogeneous catalysis and heterogeneous catalysis as a catalyst, has the advantages of high catalytic efficiency, good selectivity, wide applicability, easy recovery, greenness, economy and the like, and can realize a series of hydrogenation reactions under ultra-low catalytic amount and mild conditions.

The invention discloses a corrosion-resistant antibacterial fiber and a preparation method thereof, and relates to the technical field of functional fiber materials. When the corrosion-resistant antibacterial fiber is prepared, phenyl phosphoryl dichloride and 1, 3-propane diamine are subjected to a reaction, and phenyl phosphoryl dipropylene diamine is prepared; the preparation method comprises the following steps: reacting oxalic acid, 4-nitro-1, 2-phenylenediamine, ethylene glycol and polyphosphoric acid to prepare dinitro bis-benzimidazole, and reducing the dinitro bis-benzimidazole into bis-benzimidazole diamine; the preparation method comprises the following steps: reacting phenyl phosphoryl bis (propylene diamine), bis (benzimidazole) diamine and 3, 3 ', 4, 4'-biphenyl tetracarboxylic anhydride to prepare a partially imidized polyimide spinning solution; reacting the carboxylated graphene oxide with ethylenediamine, and then reacting with dicyandiamide to prepare modified graphene oxide; and mixing the partial imidization polyimide spinning solution with the modified graphene oxide dispersion liquid, carrying out wet spinning to prepare nascent fibers, and carrying out hot stretching treatment to prepare the corrosion-resistant antibacterial fibers. The corrosion-resistant antibacterial fiber prepared by the invention has excellent corrosion resistance, antibacterial property and flame retardance.

The invention relates to the technical field of crystalline functional materials, in particular to a metal-organic bromide material with a multicolor adjustable long afterglow characteristic as well as a preparation method and application of the metal-organic bromide material. The chemical formula of the material is [ZnBr2 (byb)] n, byb is 1, 3-bis (benzimidazole-1-yl methyl) benzene, and the preparation method comprises the following steps: under a solvothermal condition, adding a mixed solvent of zinc oxide, 1, 3-bis (benzimidazole-1-yl methyl) benzene, N, N '-dimethylformamide, water and HBr into a reaction kettle, and carrying out heating reaction, cooling, washing and drying. According to the material prepared by the invention, fluorescence emitted by the material is continuously adjustable from purple to cyan to yellow under excitation of ultraviolet light with different wavelengths, and after an excitation source is removed, the material emits bright long-lasting light which can last for several seconds and is widely adjustable from green to yellow to orange; excitation dependent type long-life phosphorescence emission from green to orange is displayed, and it is indicated that the material has huge application potential in the fields of encryption, anti-counterfeiting, information storage and the like.