163 results about "Thiocyanate" patented technology

The invention discloses a waterproof heat-resistant adhesive and a preparation method thereof, and relates to the technical field of adhesives. Tetramethyltri-3-trifluoropropyl cyclotetrasiloxane is used as a raw material to prepare hydroxyl-terminated organic fluorosilicone oil and modified epoxy resin, fluorine atoms are closely arranged around a main chain of the hydroxyl-terminated organic fluorosilicone oil and modified epoxy resin in an umbrella shape, and the hydroxyl-terminated organic fluorosilicone oil and modified epoxy resin cooperate with organic silicon to improve the waterproof and heat-resistant effects; hydroxyl groups on the oxidized carbon nanofibers are reacted and combined with thiocyanate in vulcanized rubber powder, and hybrid filler is formed; residual active groups on the surface of the oxidized carbon fiber are combined and crosslinked with epoxy resin, so that the heat resistance of the epoxy resin is greatly improved; secondly, phenyl maleic anhydride is used as a cross-linking agent to form a three-dimensional cross-linked structure, and meanwhile, phenyl is introduced into the structure, so that the heat-resistant effect and the waterproof effect of the epoxy resin are further improved, and the adhesive prepared by taking the epoxy resin as the raw material has excellent waterproof and heat-resistant performance. The adhesive prepared by the invention has waterproof and heat-resistant effects.

The invention relates to a method for generating a perovskite in-situ film through assistance of an interface protonation reaction, and the method comprises the following steps: S1, spin coating: carrying out the spin coating of a perovskite precursor solution on an acidic substrate, and forming a complex intermediate phase; the perovskite precursor solution comprises a tin halide, a monovalent cation halide, thiocyanate and an ethylenediamine derivative; s2, annealing: heating and annealing the intermediate phase of the complex on a heating stage, and inducing conversion of the intermediate phase of the complex to the tin-based perovskite thin film through a protonation reaction between the acidic substrate and the ethylenediamine derivative; the chemical structure of the tin-based perovskite is ASnX3. According to the method, the protonation reaction of the acidic substrate and the perovskite interface is utilized to assist in generating high-quality perovskite, the morphology of the thin film is effectively improved, and a high-brightness PeLED device is further prepared.

The invention discloses a method for removing thiocyanate radicals in cyanide-containing wastewater, and belongs to the technical field of metal refining. The method comprises the following steps: adding concentrated sulfuric acid to adjust the pH value of cyanogen-containing wastewater to 2-3, carrying out a stirring reaction, filtering, adding sodium hydrosulfite into a filtrate, simultaneously adding concentrated sulfuric acid to maintain the pH value to 3-5, carrying out a stirring reaction, firstly introducing a sodium sulfite acidic solution into overflowed H2S and HCN gas to absorb H2S gas, and then introducing a sodium hydroxide strong alkaline solution to absorb HCN gas. Aiming at cyanide-containing wastewater subjected to acidification treatment, firstly, a strong reducing agent sodium hydrosulfite is added to reduce SCN <-> into H2S and HCN with recycling value, then H2S is absorbed, elemental sulfur is recovered, finally HCN is absorbed, CN <-> is recovered, and the method is used for cyaniding gold extraction of a gold leaching system. The absorption and separation of H2S and HCN gas are realized, the recovery of elemental sulfur and CN <-> is further realized, and other ions are not introduced into a water supply system.

The invention discloses an autotrophic nitrogen removal and detoxification device and method for treating coking wastewater through two-stage low-oxygen short-cut nitrification, sulfur autotrophic denitrification and anaerobic ammonia oxidation, and belongs to the field of sewage treatment. The device comprises a water inlet tank, a sequencing batch reactor, a middle water tank and an up-flow anaerobic sludge blanket reactor. The method comprises the following steps: enabling the coking wastewater which is subjected to carbon capture and contains ammonia nitrogen and thiocyanate to enter a sequencing batch reactor, oxidizing the ammonia nitrogen into nitrite under a limited oxygen condition, and generating nitrogen, sulfate and ammonia nitrogen from the thiocyanate and the nitrite by autotrophic denitrifying bacteria; reaction effluent mixed with coking wastewater enters an upflow anaerobic sludge blanket, and anaerobic ammonium oxidation bacteria convert ammonia nitrogen and nitrite into nitrogen and generate a small amount of nitrate; and the residual nitrate, nitrite and thiocyanate are continuously and thoroughly removed through the sulfur autotrophic denitrification effect. The method provides a new idea for economical and efficient autotrophic nitrogen removal and detoxification of the coking wastewater containing thiocyanate and ammonia nitrogen.

The invention discloses a trigeminal neuralgia treatment method, and relates to the technical field of trigeminal neuralgia treatment. The direct effect of the M2 on the proinflammatory and pain induction characteristics of the Schwann cells can play an important role in the multi-aspect analgesic effect of the M2; the microenvironment around nerves can be changed by increasing m < 2 > m macrophages after SHED-CM, so that NP is cured; immunohistochemical analysis shows that the number of p near-end side CD206 + F4 / 80 + macrophages of qualified thiocyanate is remarkably increased through sheet-CM treatment, however, TNF-alpha + S100beta + proinflammatory Schwann cells and TNF-alpha + F4 / 80 + M1 macrophages are remarkably reduced after sheet-CM treatment.

The invention discloses an MOFs adsorbent of cumene and a preparation method and application thereof, and belongs to the technical field of adsorbent preparation, and the preparation method comprises the following steps: step 1, preparing an MIL-101 adsorbent; 2, the MIL-101 adsorbent is soaked in a thiocyanate solution for 10 min to 30 min, centrifugation, washing and drying are conducted, and the MOFs adsorbent of isopropyl benzene is obtained. The adsorption capacity of the MIL-101 adsorbent post-treated by the sodium thiocyanate to cumene gas is remarkably improved. Due to the introduction of sodium thiocyanate, a new functional group is grafted, and a new adsorption site is introduced, so that the adsorption capacity of the adsorbent on cumene gas is remarkably improved.

The technology of the present disclosure generally relates to the field of power storage devices, and more specifically to a solid electrolyte, an electrode, a solid-state battery, and a method for producing the same. An aspect of the present disclosure relates to a process for producing a solid electrolyte, comprising the steps of: - contacting, in the presence of a catalyst: - a polymer precursor compound comprising polyethylene glycol (PEG) and / or polytetrahydrofuran (PTHF), wherein the polymer precursor compound comprises on average per polymer precursor molecule, -at least 2.0 alkoxysilyl functional groups, with a functionality of at least 2.0, preferably at least 2.5, preferably at least 3.0; and / or -at least 1.0 alkoxysilyl functional groups, with a functionality of at least 3.0; - optionally, an organo-tri-alkoxy silane, an organo-tetra-alkoxy silane, and / or a mixture thereof comprising a metal ion (M+) chelating moiety being a cyanurate, a crown ether, an aza-crown ether, a thia-crown ether, a cryptand, a carbamate, a cyano group, a thiocyanate group, or a metallacrown,, - a metal (M+) salt, preferably does the metal salt comprises Li+, Na+, Mg+, Ca+, Al+, and / or a combination thereof, preferably lithium (Li+); - a solvent, preferably an organic solvent; and, - optionally, an ionically conductive compound; thereby obtaining a solid electrolyte; - optionally, drying the obtained solid electrolyte.

The invention relates to a colorimetric detection method for Tween-20 in a protein preparation, which comprises the following steps: diluting the protein preparation with a diluent for enzymolysis, carrying out chromogenic reaction by using dichloromethane and an ammonium iron thiocyanate system, and measuring absorbance by using a visible spectrophotometer. The diluent is composed of other components except protein and Tween 20 in the protein preparation; an enzyme used in the enzymolysis is protease K; the concentration of the protease K is preferably 200 mu g / ml; the enzymolysis temperature is preferably 55-57 DEG C; the enzymolysis time is preferably 3.5 to 4 hours.

The invention belongs to the technical field of copper-sulfur ore flotation, and particularly relates to a novel double-ligand chalcopyrite collecting agent and a preparation method and application thereof. According to the collecting agent, an intermediate oxalyl diisothiocyanate is mainly prepared from oxalyl chloride and thiocyanate through a thiocyanate method, and then series amine / alcohol is added through a one-pot method to prepare the collecting agent. According to the collecting agent, more stable double-bond adsorption can be formed on the surface of chalcopyrite, and the formed double-chelate ring structure is more stable than single-bond adsorption of xanthate, black powder and the like of a traditional chalcopyrite collecting agent. The collecting agent has higher collecting capacity and excellent selectivity, efficient copper-sulfur separation can be achieved under the low-alkali condition, the preparation technology of the collecting agent has the advantages of being simple, easy to operate and the like, and chalcopyrite flotation and separation of chalcopyrite and pyrite can be promoted.

The invention discloses a composite lubricant containing a porous covalent organic framework as well as a preparation method and application of the composite lubricant. The composite lubricant comprises a porous covalent organic framework material and an ionic liquid, the ionic liquid is 1-butyl-3-methylimidazolium thiocyanate, 1-ethyl-3-methylimidazolium tetrafluoroborate or 1-butyl-3-methylimidazolium hexafluorophosphate, and the porous covalent organic framework material is a porous covalent organic framework material. According to the invention, a porous covalent organic framework (COF) is added into ionic liquid (ILs) as an additive, the ionic liquid provides an ideal ionic microenvironment or is used as an active substance to endow the organic framework with extra functions such as conductivity, fluidity and dispersibility, and the COF can also improve the corrosivity of the ionic liquid.

The invention relates to a method for regulating and deacidifying in a bioleaching process of low-grade copper sulphide ore, aiming at the problem of excessive acid caused by excessive oxidation of pyrite in a dump leaching system, a thiocyanate bactericide is added into the bioleaching system of the low-grade copper sulphide ore, and the thiocyanate bactericide is dissolved in a spray liquid of the bioleaching system, and is added into the spray liquid of the bioleaching system; under the catalytic action of mineral leaching microorganisms, oxidation of ferrous ions is enhanced, so that the oxidation-reduction potential of a solution is increased, oxidation of pyrite is intensified, acid accumulation is excessive, the thiocyanate bactericide can remarkably inhibit the activity of part of sulfur-oxidizing bacteria and even kill part of sulfur-oxidizing bacteria, and therefore the activity of ferrous oxide is reduced; compared with the prior art, the method has the advantages that the sulfur oxidation activity of microorganisms is greatly influenced, but the oxidation influence on iron is relatively small, so that the acid leaching is reduced under the condition that the copper leaching of the copper sulfide ore is not influenced, the copper leaching is not influenced, the acid leaching is reduced, the production cost is reduced, the environmental influence is reduced, and the like.

The invention relates to a process for degrading thiocyanate radicals in carbon leaching tailing wastewater by a plug flow type aerobic sludge method. A process for degrading thiocyanate radicals in carbon leaching tailing wastewater by a plug-flow aerobic sludge process comprises the following steps: (1) pretreatment: adding an iron-containing agent into the carbon leaching tailing wastewater to carry out a primary cyanide breaking reaction, after the reaction is finished, settling by a thickener 1, carrying out filter pressing, and separating out filter pressing residues and filter pressing liquid; (2) carrying out multi-stage buffer and sedimentation treatment on the press filtrate to obtain overflow water; (3) introducing the overflow water into a plug flow type aerobic aeration tank, and introducing a compound flora to carry out biochemical reaction; and (4) after the reaction is finished, precipitating the water in the plug-flow aerobic aeration tank to obtain supernate and bottom sludge. According to the process for degrading the thiocyanate radicals in the carbon leaching tailing wastewater by the plug flow type aerobic sludge method, the wastewater treatment effect and the treatment capacity can be greatly improved through the treatment mode of pretreatment, multi-stage buffering and biodegradation, gold recovery is achieved, and great economic benefits are achieved.

The invention relates to the field of pesticide preparations, and discloses a sterilization composition containing tetramycin and Saisentong as well as a preparation method and application of the sterilization composition. Tetramycin and Saisentong serve as active components of the composition, and a dual-structure composite lignin derivative system serves as a functional carrier; the system is composed of high-molecular-weight modified lignosulfonate and specific lignin phenol fragments with low polymerization degree. The high-molecular-weight component forms a physical barrier on the surfaces of active component particles, so that the storage stability and the application safety of the preparation are improved; the low-polymerization-degree component can be degraded by an extracellular enzyme secreted by citrus canker pathogen, so that the targeted release of the active component at the focus is realized. The composition disclosed by the invention effectively reduces the decomposition rate of the active components and the phytotoxicity risk to crops, and meanwhile, the field control effect on the citrus canker is remarkably improved. The composition provides an efficient and safe new choice with a targeting effect for chemical prevention and treatment of citrus canker.

The present invention relates to a method for anaerobic detoxification of coal chemical wastewater, and belongs to the technical field of anaerobic detoxification of coal chemical wastewater. The method comprises pre-treatment to regulate the redox potential of the wastewater to a range of 80mV to 50mV; inoculating a mixed bacterial community of thiocyanate-degrading bacteria and phenol-hydrolyzing bacteria on a polyurethane foam carrier to form a layered biofilm; controlling the redox potential in stages, adding sodium formate under microaerobic conditions to preferentially degrade thiocyanate to produce bicarbonate; adding nano-zero-valent iron to reduce catechol and adsorb cyanide; and adding ethanol and humic acid under strictly anaerobic conditions to degrade phenols. Through the decoupling of bacterial metabolic pathways, the synergistic detoxification of metabolites and the targeted detoxification of nanomaterials, the problems of redundancy of traditional multi-stage reactor equipment, bacterial competitive inhibition and toxic accumulation of intermediate products are solved, and efficient step-by-step degradation of thiocyanate and phenols is achieved in a single reactor, the biodegradability of the wastewater is significantly improved, and a low-toxic environment is provided for subsequent treatment.

The invention relates to a CsPbBr3 inorganic perovskite composite material and a preparation method thereof. The preparation method comprises the following steps: S1, mixing thiocyanate, inorganic lead salt, inorganic cesium salt and a first carrier for reaction to obtain a first mixture; s2, carrying out mixing reaction on inorganic bromine salt and a second carrier to obtain a second mixture; s3, mixing and reacting the first mixture and the second mixture to obtain a head product; and S4, performing high-temperature calcination on the initial product to obtain the CsPbBr3 inorganic perovskite composite material. Compared with the prior art, the method has the advantages that the thiocyanate is introduced in the preparation process, the thiocyanate can be originally converted into lead sulfate to form a protective layer on the surface of CsPbBr3 during high-temperature calcination, the product has good stability, and the method has the advantages of being simple in preparation process and suitable for large-scale production.

The invention discloses a preparation method of a spherical carbon nano polymer steel slag cement grinding aid, which comprises the following steps: (1) mixing and dissolving a polycarboxybenzene compound, an amino alcohol compound and a condensing agent in an organic solvent to prepare a solution A, stirring and activating at a first temperature, then keeping stirring and heating to a reaction temperature, and reacting at a certain pressure to obtain a reaction solution B; after the reaction is finished, centrifuging and taking supernate, and filtering to obtain a polymer solution; (2) mixing the obtained polymer solution with hydrochloric acid to prepare a solution B, placing the solution B in an ice salt bath, dropwise adding a nitrite solution, and stirring for a first reaction; and adding thiocyanate and a cuprous salt catalyst, removing the ice salt bath, heating, carrying out a second reaction, and cooling to room temperature after the reaction is finished to obtain the spherical carbon nano polymer steel slag cement grinding aid. The grinding aid can improve the grinding efficiency of the steel slag cement, the performance of the steel slag cement is improved, and the process is simple and efficient.

The invention relates to the technical field of organic chemistry, in particular to a method for efficiently constructing a thiocyano substituted aromatic organic intermediate, which is characterized in that a reaction system consisting of CFBSA and KSCN is utilized, acetonitrile is used as a solvent, aromatic amine, indole and aromatic ring compounds are used as reaction substrates to generate thiocyanation reaction at room temperature, and the thiocyano group is efficiently introduced. The method has the advantages of low price, environmental friendliness, convenience in use, simplicity and convenience in operation, insensitivity to water and oxygen, no need of metal catalysis, wide substrate application range and application to thiocyanation reaction of aromatic amine compounds, indoles and phenols through thiocyanate sources such as KSCN, NH4SCN and the like.

The application belongs to the technical field of thiocyanate detection, and specifically relates to a method for detecting thiocyanate based on inherent internal standard surface-enhanced Raman scattering substrate, which comprises the following steps: S1. Preparing a thiocyanate standard curve: taking the thiocyanate concentration as the horizontal coordinate, and the ratio of the peak intensity at the characteristic peak of thiocyanate with different concentrations to the peak intensity at the internal standard peak of a bare silver SERS chip as the vertical coordinate to establish a linear regression equation, thereby obtaining the thiocyanate standard curve; S2. Detecting experimental precision; S3. Quantitatively detecting the thiocyanate content: detecting the SERS signals of the thiocyanate sample to be measured and the bare silver SERS chip, and comparing the SERS signals with the thiocyanate standard curve in step S1 to obtain the thiocyanate content to be measured. In the application, the inherent peak generated by the substrate silver oxide in the bare silver SERS chip is used as an internal standard reference, no additional internal standard substance is added, the substrate detection performance is not affected, the linear fitting of the standard curve equation is better, the influence of errors is greatly reduced, the quantification is more accurate, and the thiocyanate can be rapidly detected.

A novel bis-ligand chalcopyrite collector and a preparation method and application thereof. The collector is prepared by first synthesizing an intermediate oxalyl diisothiocyanate from oxalyl chloride and thiocyanate, and then reacting the intermediate with an amine or an alcohol using a one-pot method. The collector provided by the present disclosure can form more stable dual-site adsorption on the chalcopyrite surface, thereby generating a more stable double-chelate-ring structure than the single-site adsorption of a traditional chalcopyrite collector such as xanthate and dithiophosphate. The collector not only has higher collection ability and excellent selectivity, but also can achieve efficient copper-sulfur separation even under a low-alkalinity condition. The preparation process of the collector is simple and operable, facilitating the flotation of chalcopyrite and its separation from pyrite.

The application provides a method for preparing calcium thiocyanate by using desulfurization waste liquid, calcium nitrate and ammonium thiocyanate are respectively dissolved into 30-50% solution, the calcium nitrate solution is slowly dropped into the hot ammonium thiocyanate solution under the conditions of heating and stirring, under the heating state, the double decomposition reaction occurs to generate calcium thiocyanate and ammonium nitrate, with the continuous heating and the evaporation of water, the concentration of calcium thiocyanate gradually increases, the ammonium nitrate is heated and decomposed to generate nitrogen oxide and ammonia gas, the generated process gas rich in nitrogen oxide and ammonia gas is condensed and introduced into the coking ammonia removal and denitration section for treatment, and finally the evaporation and concentration obtain about 50% calcium thiocyanate product. The method uses industrial waste to provide raw materials, and the production cost is low; the process tail gas generated in the reaction only needs to be treated by the existing ammonia removal and denitration device of the coking enterprise, without increasing additional equipment, thereby saving the expenditure; and the method has environmental protection benefit, social benefit and economic benefit.

The utility model provides an electronic detonator for seismic exploration, which comprises a wire clamp, a conducting wire arranged below the wire clamp, a basic detonator arranged below the conducting wire, and the basic detonator consists of a shell, an initiating explosive, a transition explosive, a high explosive combination and a reinforcing cap. According to the electronic detonator for seismic exploration, the lead, the delay control module, the ignition powder, the initiating explosive, the transition explosive, the high explosive and other structures are arranged, the lead is made of pure copper, so that good conductivity is ensured, the initiation time is accurately controlled through the delay control module, and the delay precision of the detonator is improved; the trinitroresorcinol lead and the lead thiocyanate in a certain proportion are used as ignition powder, the hexogen is used as a high explosive, the Teramine is used as a transition explosive, and the perchloric acid tricarbohydrazide zinc is used as primary explosive, so that the requirements on the safety, the delay precision and the power capability of the detonator in the seismic exploration process are met; reliable application of the electronic detonator in seismic exploration is realized, and a powerful guarantee is provided for obtaining high-quality seismic exploration data.

This invention discloses a method for preparing a micro-electrolysis packing material for thiocyanate-containing wastewater: Raw materials are sieved, mixed, and formed into spheres of 1-1.5 cm in size, then dried. The raw materials include 14-50 parts iron powder, 6-47 parts activated carbon powder, 4-35 parts copper powder, 20-40 parts sodium-based bentonite, and 1-5 parts pore-forming agent. The iron powder is sieved through a 60-mesh sieve, and the undersize is then sieved through an 80-mesh sieve, with the remaining material collected. The activated carbon powder is sieved through an 80-mesh sieve, and the undersize is then sieved through a 100-mesh sieve, with the remaining material collected. The copper powder is sieved through a 160-mesh sieve, and the undersize is then sieved through a 200-mesh sieve, with the remaining material collected. The binder is sieved through a 200-240-mesh sieve, and the undersize is collected. After calcination, the spheres are magnetized in a 10-40 Mt magnetic field for 10-40 min. This invention also discloses the application of the prepared packing material in the micro-electrolysis treatment of thiocyanate. The micro-electrolysis packing material prepared by this invention for thiocyanate-containing wastewater has a high removal rate and a long service life in the pH range of 3 to 9 of the wastewater.

The invention discloses a method for recovering precious metals from an extracted organic phase. According to the method for recycling the precious metal from the extracted organic phase, thiourea-thiocyanate (TU-SCN-) is adopted to cooperate with a complexing back-extraction agent A to conduct multi-stage back-extraction on the extracted organic phase O, and metal recycling in the extracted organic phase is achieved. According to the method for recovering the precious metal from the extracted organic phase, a thiourea-thiocyanate (TU-SCN-) synergistic complexing back extraction system is adopted for recovering the metal from the extracted organic phase, the back extraction efficiency is high, and the metal recovery rate is high (gt; and precious metals such as gold and silver can be recovered from an organic phase at a relatively low cost.

The present invention provides a corrosion-preventive coating composition that allows each step in the corrosion prevention process to be carried out in fewer steps, reduces the risk of re-corrosion, and, when applied to a corroded structure, restores the surface to its pre-corrosion state. [Solution] A corrosion-resistant coating film is used, formed from a corrosion-resistant coating composition (Y) which contains an ionic liquid (X) consisting of a thiocyanate anion and a cation (B) and has a pH of 5 to 9 at 25°C, preferably having a halogen content of 20 ppm or less.

The invention discloses an anti-perovskite material. In particular to a thiocyanate-doped modified anti-perovskite material as well as a preparation method and application thereof. The anti-perovskite material has the quantum luminous efficiency of 99.8%, has a wide application prospect in the photoelectric field, is high in conductivity, and has a wide application prospect in a solid electrolyte of a solid-state lithium battery.

This invention discloses a perovskite active layer passivating agent, a perovskite solar cell, and a preparation method thereof, relating to the field of perovskite solar cell technology. The invention uses a combination of formamidine thiocyanate (FASCN) and dodecyl ammonium bromide (DABr) as passivating agents. Through the "phase screening" effect of FA⁺ and the coordination regulation of SCN⁻, n=3 single-phase quasi-two-dimensional perovskite is selectively generated on the wide-bandgap perovskite surface, completely suppressing the n=2 phase and eliminating multiphase energy level disorder. Simultaneously, it achieves triple synergistic passivation: SCN⁻ coordinates and passivates lead defects, Br⁻ fills halogen vacancies, and FA⁺ occupies A-site vacancies, resulting in a 27% reduction in trap density and a 12-fold increase in carrier lifetime. The resulting perovskite solar cell exhibits a 6.8% increase in efficiency, significantly enhanced thermal stability, and a 4-fold increase in T80 lifetime. Furthermore, it is fully compatible with existing preparation processes and suitable for large-scale production.

The application discloses a reverse perovskite material. Specifically, a thiocyanate doped modified reverse perovskite material, a preparation method and application thereof are provided. The reverse perovskite material has a quantum luminous efficiency of 99.8%, has a wide application prospect in the photoelectric field, and has a high conductivity, and has a wide application prospect in a solid-state electrolyte of a solid-state lithium battery.

The invention provides a method for improving the energy storage density of a polythiourea film through block copolymerization, which comprises the following steps: adding thiocyanate into a polar solvent, and stirring to dissolve the thiocyanate to obtain a dissolved solution; adding excessive aromatic ring diamine into the dissolved solution for multiple times, and reacting in an inert gas atmosphere to obtain an amino-terminated polythiourea precursor; adding dianhydride and m-phenylenediamine into the amino-terminated polythiourea precursor, and continuously reacting to obtain a segmented copolymer solution; uniformly coating a carrier with the segmented copolymer solution, heating to remove the polar solvent, then heating at a preset rate step by step, and respectively keeping preset time at different temperatures to complete imidization; the carrier is placed in deionized water to be soaked and demolded, the obtained polythiourea-based segmented copolymer film is dried under the vacuum condition, and the energy storage density of the polythiourea film is improved. The obtained polythiourea film has high breakdown strength, the energy storage density is improved, the cost is low, and the polythiourea film has good application prospects in the field of film capacitors.

The invention relates to a steel ball valve which comprises a ball valve main body, and the surface of the ball valve main body is treated by an antirust agent comprising the following components: pyridine-3-carboxylic acid acyl chloride, n-butylamine thiocyanate, p-formylbenzoic acid, 4-hexylbenzaldehyde, pyrrole, p-toluene sulfonic acid, propionic acid, absolute ethyl alcohol, polyethylene glycol and dichloromethane. The application has the following advantages and effects: an acyl chloride group in pyridine-3-carboxylic acid acyl chloride reacts with n-butylamine thiocyanate, and a-N = C = S group is introduced to improve the corrosion inhibition performance; p-methylbenzenesulfonic acid catalyzes p-formylbenzoic acid, 4-hexylbenzaldehyde and pyrrole to react to obtain a porphyrin compound, the porphyrin compound has hydrophilic carboxyl and a hydrophobic long carbon chain, and the overall amphoteric balance of the antirust agent is improved; the acyl isothiocyanate compound and the porphyrin compound have a synergistic effect to enhance the rust prevention and corrosion inhibition performance of the ball valve main body, so that the corrosion generated when the steel ball valve is exposed in a humid environment for a long time is reduced, and the service life is prolonged.