40 results about "Mercaptobenzimidazol" patented technology

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 discloses a synthesis method of 5-(1H-pyrrole-1-yl)-2-mercaptobenzimidazole, which comprises the following steps: carrying out cyclization condensation reaction on o-phenylenediamine and thiourea in an acidic environment provided by hydrochloric acid to obtain 2-mercaptobenzimidazole; the preparation method comprises the following steps: carrying out nitration reaction on 2-mercaptobenzimidazole, sulfuric acid and nitric acid to obtain 2-mercapto-5-nitrobenzimidazole; the preparation method comprises the following steps: carrying out nitro reduction reaction on 2-sulfydryl-5-nitrobenzimidazole and hydrogen under the catalysis of nickel to obtain 5-amino-2-sulfydryl benzimidazole; the preparation method comprises the following steps: carrying out an N-alkylation reaction on 5-amino-2-mercapto benzimidazole and tetrahydro-2, 5-dimethoxyfuran under the catalysis of copper chloride to generate 5-(1H-pyrrole-1-yl)-2-mercapto benzimidazole, and carrying out a reaction on the 5-amino-2-mercapto benzimidazole and tetrahydro-2, 5-dimethoxyfuran to generate the 5-(1H-pyrrole-1-yl)-2-mercapto benzimidazole. The method disclosed by the invention has the outstanding advantages of mild and easily-controlled conditions, simple and convenient post-treatment, high yield, economy, environmental protection, suitability for large-scale production and the like, conforms to the green chemical development concept, and has important application value.

The application belongs to the technical field of corrosion protection of oil and gas wells and gathering pipelines, and specifically discloses a kind of corrosion and scale inhibition composition, corrosion and scale inhibitor and its preparation method and application. The corrosion and scale inhibition composition comprises: 40-50 parts by weight of mercapto benzimidazole derivative, 10-20 parts by weight of synergist, 8-15 parts by weight of compound auxiliary agent, 3-8 parts by weight of surfactant, appropriate amount of alkaline pH regulator and appropriate amount of solvent. The composition of the application has excellent corrosion and scale inhibition performance, and the components are compatible, without precipitation, flocculation and other phenomena, and the problem of decomposition of active ingredients during use, showing excellent stability and corrosion and scale inhibition synergistic effect.

The invention relates to the technical field of NBR composite materials, in particular to a low-temperature-resistant wear-resistant NBR composite material and a preparation method and application thereof. The invention provides a low-temperature-resistant wear-resistant NBR (nitrile-butadiene rubber) composite material, which is prepared from the following components in parts by mass: 100 parts of NBR raw rubber, 2 to 6 parts of zinc oxide, 0.5 to 2 parts of stearic acid, 30 to 80 parts of carbon black, 1 to 3 parts of 2-mercaptobenzimidazole, 2 to 12 parts of oleylamine grafted halloysite nanotubes, 0.5 to 2 parts of sulfur and 0.5 to 4 parts of N-cyclohexyl-2-benzothiazole sulfenamide. According to the low-temperature-resistant wear-resistant NBR composite material, the compatibility of the additive and the NBR raw rubber is good, and the blooming phenomenon is avoided.

The invention belongs to the technical field of silver etching liquid, and particularly discloses phosphorus-free environment-friendly silver etching liquid as well as a preparation method and application thereof. The phosphorus-free environment-friendly silver etching solution is prepared from the following components in percentage by mass: 25 to 40 percent of inorganic acid, 10 to 20 percent of organic acid, 1 to 5 percent of silver chelating agent, 5 to 12 percent of alkalescent salt, 3 to 5 percent of 2-mercapto benzimidazole derivative, 1 to 3 percent of methoxypolyethylene glycol and the balance of water. The 2-sulfydryl benzimidazole derivative is at least one of 2-sulfydryl-5-methoxy benzimidazole, 2-sulfydryl-5-methyl benzimidazole and 5-amino-2-sulfydryl benzimidazole, and the 2-sulfydryl benzimidazole derivative is at least one of 2-sulfydryl-5-methoxy benzimidazole, 2-sulfydryl-5-methyl benzimidazole and 5-amino-2-sulfydryl benzimidazole. According to the formula, phosphoric acid is not added, all the components cooperate to achieve rapid etching, high-precision patterns and no crevice corrosion and silver after-tack phenomena, waste water is easy to treat, and the cost is lower.

The application relates to the technical field of ABS particle preparation, and discloses an antibacterial ABS particle and a preparation method thereof, the antibacterial ABS particle comprising the following raw materials: ABS resin, anti-aging natural rubber, a flame retardant, a lubricant, an ultraviolet absorber, antibacterial halloysite nanotubes and an initiator; wherein the anti-aging natural rubber is prepared by reacting epoxidized natural rubber with 2-mercaptobenzimidazole; the antibacterial halloysite nanotubes are prepared by reacting halloysite nanotubes with isonicotinic acid, and then reacting with 8-bromo-1-octene. The antibacterial ABS particle prepared by the application has excellent impact resistance, toughness, anti-aging performance and antibacterial performance, can exert long-term antibacterial and anti-aging effects, can meet the application requirements in various environments, greatly expands the use field of the ABS particle, significantly prolongs the service life of the ABS particle, and can generate great economic benefits.

The invention provides a copper electroplating solution, a preparation method and application thereof, a solar cell and a photovoltaic module, and relates to the technical field of solar cells. The copper electroplating liquid comprises a copper ion source, a main complexing agent, an auxiliary complexing agent, conductive salt, a functional additive and water, wherein the functional additive is prepared from a 2-mercapto benzimidazole-zinc complex, L-ascorbic acid, 3-mercapto-1-sodium propanesulfonate, sodium polyaspartate and water. The copper electroplating solution is free of corrosion to a silicon substrate and a passivation layer, the structural integrity of a battery is guaranteed, efficient deposition of a compact and low-resistance copper layer is achieved through the synergistic effect of a double-complexing system and a functional additive, and the conductivity and the interface bonding force are improved; meanwhile, the formed chemical bonding interface enhances the copper-silver adhesion, the electrical property and long-term reliability of the cell are remarkably improved, and the method is suitable for large-scale manufacturing of the high-performance back contact solar cell.

This invention relates to the field of printed circuit board manufacturing technology and discloses a fine etching process for PCB circuit patterns. The process includes injecting a fine etching composition comprising deionized water, hydrochloric acid, copper chloride dihydrate, anhydrous magnesium chloride, p-toluenesulfonic acid monohydrate, polyethylene glycol, and 2-mercaptobenzimidazole into a circulating working tank of an etching machine; setting the temperature of the working solution in the circulating working tank; sending the substrate to be etched, after dry film development, into a spray section; activating the spray array and setting the spray pressure to etch the substrate; and rapidly rinsing the etched substrate in a deionized water washing section, followed by strong air drying to obtain the circuit pattern. This invention reduces surface tension through specific components to promote solution penetration into the microstructure, utilizes an organic corrosion inhibitor to form a stable protective layer on the trench sidewalls, and combines the vertical impact of the nozzle jet on the bottom, leveraging the difference between mechanical force and chemical adsorption force to achieve anisotropic etching, thus suppressing lateral corrosion of fine circuits.

This invention provides modified zinc oxide and its applications, UV- and ozone-resistant self-lubricating materials and their preparation methods and applications, relating to the field of composite material technology. The modified zinc oxide provided by this invention is obtained by grafting zinc oxide onto a silane coupling agent using 2-mercaptobenzimidazole. The modified zinc oxide provided by this invention combines the excellent aging resistance of 2-mercaptobenzimidazole with the excellent UV absorption properties of zinc oxide, while also improving the dispersibility of nano-zinc oxide and overcoming the volatilization and migration problems of 2-mercaptobenzimidazole. This significantly improves the UV and ozone resistance of resin composites and effectively enhances their wear resistance. Resin composites filled with modified zinc oxide exhibit good reliability and service life in near-space environments, and show promising application prospects as self-lubricating pad materials for steering, load-bearing, rotating, and bushing components of aircraft.

The application discloses an anti-aging luggage cloth and a preparation method thereof. Polyethylene imine is mixed into PVC in a blending mode to obtain a PVC blending film. Water in the polyethylene imine aqueous solution plays a role of a pore forming agent in the film forming process. The volume originally occupied by water molecules forms a pore structure, which is beneficial to the subsequent loading of titanium dioxide and 2-mercaptobenzimidazole, improves the loading capacity, and further improves the anti-aging performance of the luggage cloth. Titanium acid tetraisopropyl ester and 2-mercaptobenzimidazole are added into an ethanol solution to avoid the direct addition of titanium dioxide powder and 2-mercaptobenzimidazole, and the problem of easy agglomeration. The titanium dioxide and 2-mercaptobenzimidazole jointly improve the anti-aging performance of the cloth. Then, under the action of a crosslinking agent, epoxy chloropropane, the titanium dioxide and 2-mercaptobenzimidazole are firmly attached to the PVC film and are not easy to fall off. After multiple water washing, the luggage cloth still has good anti-aging performance.

The invention discloses a copper-titanium etching solution, and relates to the technical field of microelectronic device manufacturing, and the copper-titanium etching solution comprises the following components by mass: 4.5-8.5% of ammonium persulfate; 1.5%-3.5% of urea peroxide; 1.0% to 2.0% of 1-hydroxybenzotriazole-5-carboxylic acid; 0.3% to 0.9% of 2-mercapto benzimidazole; 0.5% to 1.5% of sulfobutyl ether-beta-cyclodextrin; 0.8%-2.2% of L-aspartic acid-N, N-diacetic acid; 0.1% to 0.7% of iso-tridecanol polyoxyethylene ether; 0.05%-0.15% of ceric ammonium nitrate; 0.02% to 0.08% of sodium polyacrylate; and the balance of deionized water. According to the method, the matching problem of the etching rate is solved, the stability is improved, and substrate corrosion is avoided.

The invention relates to the technical field of power cable insulating materials, and discloses a compression-resistant insulating power cable material, a preparation method and a power cable, the insulating material comprises the following raw materials: low density polyethylene, ethylene propylene diene monomer, N, N '-m-phenylenedimaleimide, 2-mercaptobenzimidazole, zinc stearate, zinc methacrylate and dicumyl peroxide. In the preparation process, N, N '-m-phenylenedimaleimide and 2-sulfydryl benzimidazole are subjected to an in-situ addition reaction to generate a macromolecular crosslinking precursor, and free sulfydryl masking is realized. The precursor and zinc methacrylate are subjected to coordination to form polar nodes, and a homogeneous cross-linked network containing electron deep traps and dynamic sacrificial bonds is constructed after cross-linking and curing. Under the condition that no inorganic filler is added, irreversible slippage and space charge accumulation of macromolecular chain segments in an insulator are effectively inhibited, so that the cable material has high compression resistance, low creep deformation, high electrical strength and long-acting thermo-oxidative aging resistance.

The invention relates to the technical field of rubber, in particular to a high-temperature-resistant rubber-based elbow and a preparation method thereof. The preparation method comprises the following steps: blending a flexible flame-retardant acrylic copolymer and fluororubber, stirring, dissolving, demulsifying, washing with water, and drying in vacuum to obtain the modified fluororubber. Mixing butyl rubber, vinyl modified white carbon black, sulfur, activating agent zinc oxide and accelerating agent 2-mercaptobenzimidazole, and performing mixing and calendering to obtain an inner rubber layer; mixing modified fluororubber, vinyl modified white carbon black, bisphenol AF, an activator calcium hydroxide and an accelerant benzyl triphenyl phosphorus chloride, and carrying out mixing and calendering to obtain an outer rubber layer; an inner rubber layer, a nylon fabric layer and an outer rubber layer are sequentially laid, steel wires are wound after vulcanization, and the rubber-based elbow is obtained; and then the connecting piece and the rubber-based elbow are assembled and formed, and a finished product is obtained. The finished product prepared by the invention has good high-temperature resistance, flame retardance and mechanical properties, so that the finished product has a wide application prospect in the technical field of rubber.

The invention discloses a green deplating solution for a photovoltaic welding strip and a valuable metal separation and recovery method. The deplating solution is an aqueous solution, and solutes comprise a main oxidizing agent, a green acidic auxiliary agent, a complexing cosolvent and a copper special corrosion inhibitor; the main oxidant is selected from sodium persulfate, ammonium persulfate and ferric nitrate; the green acidic auxiliary agent is selected from sulfamic acid, methanesulfonic acid, tartaric acid and citric acid; the complexing cosolvent is selected from sodium chloride, ammonium chloride and thiourea; and the corrosion inhibitor is selected from benzotriazole, methyl benzotriazole and 2-mercapto benzimidazole. The waste welding strip is subjected to an immersion reaction at the temperature of 20-60 DEG C, tin, lead and / or silver enter the solution in the form of complex ions, and a copper substrate is kept bright and clean; and after solid-liquid separation, gradient recovery of silver extraction by replacement, lead separation by temperature difference crystallization and tin precipitation by hydrolysis can be adopted, or total replacement recovery by adding excessive zinc-based displacer can be adopted. The separation and recovery method is rapid in deplating, free of white films, low in copper loss and suitable for silver-containing and silver-free solder strips.

The present application relates to the paint technical field, especially relates to a kind of nano composite material EP@DA@GO@M and preparation method thereof, water-based epoxy heavy-duty anticorrosive coating with slow-release function and preparation method thereof.The preparation method of the nano composite material EP@DA@GO@M includes the following steps: water-based graphene slurry a is diluted to obtain graphene slurry b;Dopamine, catalyst, water and 1,6-hexanediol diglycidyl ether are mixed to form mixed solution C;Graphene slurry b is added in mixed solution C, and mixed at (25~35) ℃ for (20~24) h to obtain composite material EP@DA@GO;2-mercapto benzimidazole anhydrous ethanol solution is added to silane coupling agent to obtain mixture KM;After EP@DA@GO, water and KM are mixed, heated to react to obtain nano composite material EP@DA@GO@M.The nano composite material EP@DA@GO@M prepared by the present application is applied in water-based epoxy coating, can effectively improve the anticorrosion of water-based epoxy coating, realizes long-acting anticorrosive function of water-based epoxy coating, in addition, its preparation raw material is biological material, and coating is green and environment-friendly.

The invention relates to a preparation method and application of 5-(1H-pyrrole-1-yl)-2-mercaptobenzimidazole, according to the preparation method, key parameters such as an ester extraction solvent, a pH adjusting range, a pulping solvent, a ratio of a concentrated solution to the pulping solvent and the like are determined to cooperate with each other, and efficient separation and purification of a product are realized. And the synergistic improvement of economy, environmental protection, high yield and high content is realized. The solvents and reagents selected in the whole process are conventional chemical raw materials, are low in price and easy to obtain, and the solvents and mother liquor can be recycled and reused, so that the production cost is further reduced; the operation process is simplified, the production cost and the environmental protection pressure are reduced, and the environmental protection requirement of industrial production is met; the yield of the target product can be stably kept at 74% or above, the purity can reach 99% or above, and the content is higher than 97%. The prepared product can be applied to preparation of ilaprazole, meets the quality requirement for preparation of qualified ilaprazole bulk drugs, and has important industrial application value.

The invention discloses a preparation method of a flame-retardant high-elasticity fabric, and relates to the technical field of textile materials. When the flame-retardant high-elasticity fabric is prepared, soybean oil and 2-mercaptobenzimidazole initiate grafting and then react with 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride to prepare modified soybean oil, then the modified soybean oil reacts with diethanol amine to synthesize modified soybean oil diethanolamide, the modified soybean oil diethanolamide is used as a chain extender, and the flame-retardant high-elasticity fabric is prepared. The preparation method comprises the following steps: polymerizing the modified polyurethane with polytetramethylene ether glycol 2000, isophorone diisocyanate and a glycol ultraviolet absorbent to prepare modified polyurethane, and carrying out wet spinning to prepare functional polyurethane fibers; the preparation method comprises the following steps: carrying out condensation on m-phenylenediamine and phenylphosphonic dichloride to synthesize a flame-retardant intermediate, participating in meta-aramid polymerization to prepare modified aramid, and carrying out wet spinning to prepare flame-retardant aramid fibers; the two kinds of fibers are blended in proportion and subjected to post-treatment, and the flame-retardant high-elasticity fabric is obtained. The fabric prepared by the method has excellent flame retardance, ultraviolet resistance, oxidation resistance, high elasticity and mechanical strength.

The invention provides a method for synthesizing a benzimidazobenzothiazole compound, and belongs to the technical field of fine chemical synthesis. The preparation method comprises the following steps: mixing a 2-mercapto benzimidazole compound, fluoride, alkali, an additive, a molecular sieve and dichloromethane, then adding a benzyne precursor into the mixture, and synthesizing the benzimidazobenzothiazole compound at 110 DEG C; the method has the advantages of simplicity, convenience, rapidness, no need of transition metal catalysis, wide substrate range, cheap and easily available fluorine source, no environmental pollution and the like; the method has the advantages of being simple in process, good in universality and the like, the yield of the synthesized benzimidazobenzothiazole compound is as high as 90%, and the method has extremely high industrial popularization value.

The invention provides a preparation method and application of a reaction type antioxidant based on a sulfydryl-containing benzimidazole micromolecular antioxidant, and the preparation method comprises the following steps: in the presence of a catalyst, carrying out Michael addition reaction on the sulfydryl-containing benzimidazole antioxidant and a bio-based monomer containing double bonds and carboxyl to obtain an intermediate compound; and in the presence of a condensing agent and an activating agent, carrying out esterification reaction on the intermediate compound and cellulose to obtain the reaction type antioxidant based on the sulfydryl-containing benzimidazole micromolecular antioxidant. According to the method, a bio-based monomer containing double bonds and carboxyl and a cellulose chemical grafting micromolecular mercapto-containing benzimidazole antioxidant are adopted to construct a molecular structure with high molecular weight characteristics and multiple antioxidant functions, the bio-based monomer containing double bonds and carboxyl is used as a bridging agent, the micromolecular antioxidant is bonded into a rubber molecular chain, and the molecular structure is formed by compounding the bio-based monomer containing double bonds and carboxyl and the cellulose chemical grafting micromolecular mercapto-containing benzimidazole antioxidant. The problems of migration, volatilization and environmental compatibility of micromolecular antioxidants are fundamentally solved, meanwhile, the anti-oxidation efficiency and the material durability are improved, and the service life of latex gloves is prolonged.

The invention relates to the field of anticorrosive coatings, and particularly discloses a self-repairing anticorrosive coating and a preparation method thereof. The self-repairing anticorrosive coating comprises the following raw materials: 100 parts of bisphenol A epoxy resin, 35-40 parts of butyl acetate, 1-5 parts of a filler, 45-55 parts of a polyamide curing agent, 1-2 parts of a wetting dispersant and 2-5 parts of an auxiliary agent, wherein the filler comprises 2-mercaptobenzimidazole intercalated magnesium aluminum hydrotalcite and 8-hydroxyquinoline intercalated montmorillonite in a weight ratio of (0.5-2.0): 1. The 2-mercaptobenzimidazole intercalated magnesium-aluminum hydrotalcite and the 8-hydroxyquinoline intercalated montmorillonite are added into the anticorrosive coating, the anticorrosive coating with better corrosion resistance is prepared by utilizing the synergistic effect of the 2-mercaptobenzimidazole intercalated magnesium-aluminum hydrotalcite and the 8-hydroxyquinoline intercalated montmorillonite, and the anticorrosive coating also has ion stimulation response self-repairing performance, so that release of a corrosion inhibitor in the coating is effectively controlled, and the service life of the coating is prolonged. The anti-corrosion period and the protection performance of the coating are improved, and the service life of the anti-corrosion coating is prolonged.

According to the external preparation composition containing the S-flurbiprofen and the preparation method of the external preparation composition, 2-mercapto benzimidazole and isopropyl myristate are compounded to serve as a stabilizer, the dosage and the proportion of the 2-mercapto benzimidazole and the isopropyl myristate are controlled, and the external preparation composition containing the S-flurbiprofen is obtained and has the advantages that the content of the S-flurbiprofen is stable; the external preparation composition of the S-flurbiprofen has the advantages of simple preparation process, low probability of crystallization, uniform release and stable quality, and is suitable for industrial large-scale production, and the whole preparation method is simple.

The application discloses a copper plating composition and a chemical copper plating process, and relates to the field of copper plating compositions, which is composed of the following components: a copper salt providing divalent copper ions; a complexing agent for complexing the divalent copper ions; a stabilizer for stabilizing the copper plating composition, which is selected from at least one of the group consisting of 2,2'-dipyridyl, potassium selenocyanate, potassium thiocyanate and 2-mercaptobenzimidazole; a reducing agent for reducing the complexed divalent copper ions to metallic copper; an alkaline adjusting agent for adjusting the pH value of the composition to an alkaline range suitable for chemical copper plating; and a solvent. The process stability and product yield are improved: through the optimized combination of the core stabilizer, the complexing agent and the reducing agent, the self-decomposition of the copper plating bath is effectively inhibited, the process stability is significantly enhanced, the incidence of key defects such as backlight defects in the metalization of the circuit board hole is greatly reduced, and the high yield of the final product is ensured.

The invention discloses a copper material room temperature passivation treatment method and an obtained corrosion-resistant copper material. The copper material room temperature passivation treatment method comprises the following specific steps: 1) surface purification treatment of a copper material; 2) immersing a copper material with a clean surface into an ethanol solution of n-dodecanethiol, and standing at room temperature to form a self-assembled single-layer film on the surface of the copper material; and 3) dissolving 2-mercaptobenzimidazole in ethanol to obtain an ethanol solution of 2-mercaptobenzimidazole, then adding the ethanol solution of 2-mercaptobenzimidazole into a NaOH aqueous solution to obtain a 2-mercaptobenzimidazole solution, and then immersing the copper material with the monomolecular layer constructed on the surface into the 2-mercaptobenzimidazole solution for room temperature passivation treatment to obtain the corrosion-resistant copper material. The passivation treatment method is carried out at the room temperature, the adopted chemical reagent is a low-toxicity reagent, the dosage is small, and compared with the prior art, the passivation treatment method has the advantages of being easy to operate, low in cost, environmentally friendly, short in consumed time and suitable for batch copper material treatment in industrial production, and the production efficiency is improved.

The invention concerns an insoluble salt composition having antimicrobial activity, said composition containing zinc and a cation of a cationic surface-active agent, wherein the cationic surface-active agent is preferably selected from benzalkonium, didecyldimethylammonium, octenidine and chlorhexidine. The invention further relates to an insoluble compound having antimicrobial activity, said compound having a structure represented by the general formula (W"1+)n[Zn2+(L2-)2], wherein W is a cationic surface active agent, preferably selected from benzalkonium, didecyldimethylammonium, octenidine and chlorhexidine and L is a bridging ligand capable of coordinating the zinc cation and capable of binding through an ionic bond the cation of a cationic surface active agent, preferably selected from the group consisting of 2-mercapto-5-benzimidazole sulfonate and 3-mercapto-1-propansulfonate, and mixtures thereof. The invention further relates to an antimicrobial powder composition or a functionalized antimicrobial powder comprising the insoluble salt composition according to the invention and a silica powder, such as silicon dioxide or silicon dioxide amorphous, wherein the salt composition is adsorbed to the surface of the silica powder. The composition and compound of the invention may be included in alcoholic solutions or may be formulated as gel, cream or powder. The composition and compound of the invention may be used in antimicrobial treatment, antiviral treatment and / or antifungal treatment

This invention provides a collector for oxidizing gold ores, comprising, by weight, the following components: 40-200 parts aliphatic amine, 20-40 parts aliphatic sulfate, 8-12 parts methyl isobutyl methanol, 3-6 parts 2-mercaptobenzimidazole, 2-7 parts ammonium citrate, and 1-3 parts 2-hydroxy-3-naphthylhydroxamic acid; it enables the collector to obtain a more stable adsorption layer and a higher adsorption layer density, increases the adsorption amount of the collector at the bubble / flotation liquid interface, and achieves a yield of over 80%.

The invention discloses a bending fatigue resistant high-performance cable for gap bridge communication between carriages, and belongs to the technical field of cables. The preparation process of the cable comprises the following steps: re-stranding the small-diameter soft copper wire conductors coated with the insulating layers to obtain the insulating wire cores, then stranding the plurality of insulating wire cores to form a cable core, and forming the tinned copper wire braid layer on the surface of the cable core; and mixing a linear polyurethane prepolymer, a modified cross-linking agent, a lubricant, an antioxidant and nano-zinc oxide, coating the surface of the shielding layer with the mixture through extrusion molding, and then treating the mixture in a hot air cross-linking channel for 30-40 minutes to form a protective layer, thereby finally obtaining the high-performance cable. According to the invention, a polyfunctional group modified cross-linking agent integrating a sulfydryl group, a benzimidazole structure, a DOPO flame-retardant unit and a polar group is synthesized through molecular design, and the polyfunctional group modified cross-linking agent is applied to a protective layer of an anti-bending fatigue high-performance cable for inter-carriage gap bridge communication. The design effectively improves the comprehensive performance of the cable.

The invention belongs to the technical field of protein purification, and particularly relates to a chromatography medium, a preparation method of the chromatography medium and application of the chromatography medium to extraction of lactoferrin. The chromatography medium provided by the invention is prepared by taking agarose as a matrix, grafting a dextran extension chain on the surface in an activation manner and further coupling a ligand; wherein the molecular weight of the glucan ranges from 100 kDa to 500 kDa, the ligand comprises 2-mercaptobenzimidazole-5-sulfonic acid, and in the chromatography medium, the density of the ligand ranges from 200 [mu] mol / mL to 300 [mu] mol / mL. The invention also provides a preparation method, which comprises the following steps: sequentially carrying out epoxy activation, dextran modification, secondary activation and ligand coupling on the hydroxyl-containing matrix to obtain the hydroxyl-containing polymer. When being used for extracting lactoferrin from skimmed milk, the chromatography medium provided by the invention has the advantages of high loading capacity, high specific capturing capacity and high-efficiency regeneration, and realizes high-efficiency adsorption of lactoferrin and high-efficiency removal of impurities.

The application relates to a high-temperature-resistant antioxidant lubricating oil and a preparation method thereof, and belongs to the technical field of lubricating oils. A bentonite imidazole composite particle grafted antioxidant and an alkyl imidazole phosphate ionic liquid complex system are constructed to achieve a double-antioxidation effect. MoS2 nanosheets in the bentonite imidazole composite particle are exposed to sufficient S vacancies after low-temperature ultrasonic crushing, form stable covalent grafting with the mercapto group of 2-mercaptobenzimidazole, avoid the defects that traditional small-molecule antioxidants are easy to volatilize and migrate, meanwhile, the alkyl imidazole phosphate ionic liquid forms a dynamic balance in base oil, continuously releases a nitrogen-containing cation component, cooperates with the grafted antioxidant to capture free radicals generated at high temperature, interrupts the oxidation chain reaction, on the process, the composite bentonite prepared by a solvothermal method provides a stable carrier for the antioxidant component, a freeze-drying process retains the porous structure and active sites of the material, improves the initial oxidation temperature of the lubricating oil, and effectively adapts to high-temperature long-time operation conditions.

The application discloses a kind of heat-conducting TPU films, the application increases the adsorption site of boron nitride surface by introducing amino group on the surface of boron nitride, which is conducive to subsequent adsorption of copper ions, then using hydrazine hydrate to reduce copper ions, copper nanoparticles are formed on the surface and interlayer of hexagonal boron nitride, forming a heat-conducting path, further improving the thermal conductivity of hexagonal boron nitride;Then the copper-loaded boron nitride is immersed in 2-mercaptobenzimidazole solution, the lone pair electrons of heteroatoms such as N and S in 2-mercaptobenzimidazole and the large pi bond of benzene ring can form coordination bond with copper atoms, forming an organic film on the surface of copper, improving the bonding force between copper-loaded boron nitride and TPU;At the same time, the mercapto group in 2-mercaptobenzimidazole can react with the double bond in vinyltriethoxysilane, enhancing the bonding force between the heat-conducting layer and the intermediate layer, and further improving the overall mechanical properties of the heat-conducting TPU film.

The invention discloses an electrolyte additive for a lithium battery and application of the electrolyte additive in the lithium battery, and the method comprises the following steps: (1) adding 2-mercapto benzimidazole with a mercapto and benzimidazole structure and a derivative thereof into an electrolyte as the electrolyte additive to prepare an electrolyte for a lithium metal battery. And (2) injecting the electrolyte in the step (1) into the lithium metal battery, standing for a certain time to ensure the formation of a uniform and compact self-assembled monomolecular layer on the negative electrode side, and constructing the artificial SEI on the negative electrode side in situ. According to the invention, the artificial SEI layer which can interact with the negative electrode so as to be directionally arranged on the negative electrode side to form a stable structure is added and is always positioned at the interface of the metal lithium and the electrolyte, so that the direct contact between the metal lithium and the electrolyte is prevented, the side reaction is inhibited, the consumption of active Li < + > of the battery caused by continuous formation of SEI is reduced, and the coulombic efficiency of the battery is improved.