44 results about "Diphenyl disulfide" patented technology

The invention belongs to the technical field of epoxy resin, and particularly relates to double-dynamic-bond synergistic exchange epoxy resin as well as a preparation method and application thereof. The preparation method of the double dynamic bond synergistic exchange epoxy resin comprises the following steps: adding aromatic dialdehyde and amino-containing disulfide into a solvent for condensation reaction, and filtering and drying to obtain a double dynamic bond curing agent; the preparation method comprises the following steps: adding the double-dynamic-bond curing agent into epoxy resin, carrying out ring-opening addition reaction, carrying out gradient heating curing, and cooling to room temperature, the aromatic dialdehyde is terephthalaldehyde, isophthalaldehyde or o-phthalaldehyde, and the amino-containing disulfide is 2, 2 '-diaminodiphenyl disulfide or 4, 4'-diaminodiphenyl disulfide. The invention designs and synthesizes a double-dynamic covalent bond curing agent containing an imine bond and a disulfide bond, and is used for constructing a novel degradable and self-healing epoxy resin. The material maintains good thermal stability and insulation performance, and realizes degradation and self-healing functions at the same time.

The invention relates to the technical field of lithium ion batteries, in particular to a thermal response interface passivator composition, an electrolyte and a lithium ion battery. The thermal response interface passivator composition comprises a silane component and a chalcogenide component, the silane component is selected from any one or more of 3-mercaptopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane or gamma-methacryloyloxypropyltrimethoxysilane, and the silane component is selected from any one or more of 3-mercaptopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane and gamma-methacryloyloxypropyltrimethoxysilane; the sulfur component is selected from diisopropyl xanthate disulfide and / or diphenyl disulfide. The thermal response interface passivator composition provided by the invention does not influence the electrochemical performance of a battery under the conventional operation condition of the battery, and can spontaneously polymerize on the surface of a negative electrode at the high temperature of 100-120 DEG C to form a stable and compact passivation layer, namely, an effective thermal barrier is formed before a diaphragm is broken, so that electron leakage and electrolyte decomposition are effectively blocked, and the service life of the battery is prolonged. And the thermal safety of the battery is obviously improved.

The invention discloses an application of diphenyl disulfide as an additive of an active layer of a photovoltaic cell and the photovoltaic cell, which comprises the step of adding a volatile solid additive diphenyl disulfide into the active layer to regulate and control the performance of the active layer. The solid additive is added in the acceptor film forming process, and acceptor molecule aggregation and crystallization behaviors are continuously regulated and controlled in the film forming process and the thermal annealing process. The introduction of diphenyl disulfide can synergistically optimize multi-stage crystallization kinetics, enhance H-aggregation and J-aggregation at the same time, promote the formation of a receptor fibrous polycrystalline structure, improve the carrier mobility, and effectively improve the exciton dissociation and charge transfer capabilities of the active layer. Based on the regulation and control, the organic photovoltaic device using the diphenyl disulfide as the additive realizes the significant improvement of photovoltaic performance, the energy conversion efficiency reaches 19%, a new development direction is provided for the design of a multifunctional solid additive and the accurate control of the form of an active layer in the future, and a powerful technical support is provided for organic photovoltaic industrialization in the future.

To provide a cathode mixture configured to increase the discharge capacity of a lithium secondary battery. The cathode mixture is a cathode mixture for lithium secondary batteries, comprising: a cathode active material containing an S element, and diphenyl disulfide as an additive, wherein a content of the diphenyl disulfide in the cathode mixture is less than 13.0 mass % of a total mass (100 mass %) of the cathode mixture.

The invention discloses a synthesis process of high-yield sodium benzenesulfinate, and belongs to the technical field of synthesis of sodium benzenesulfinate. The synthesis process of the high-yield sodium benzenesulfinate comprises the following preparation steps: S1, mixing a first catalyst, sodium hydroxide and a first solvent, then adding powdered sulfur, reacting for a first reaction time under microwave radiation, then adding chlorobenzene, continuously reacting for a second reaction time under microwave radiation, then filtering, carrying out reduced pressure distillation to remove the solvent, and recrystallizing, so as to obtain the high-yield sodium benzenesulfinate. The diphenyl disulfide is obtained; s2, mixing the diphenyl disulfide prepared in the step S1, alcohol, an oxidizing agent and a second solvent, stirring in the air at room temperature for a third reaction time, diluting with ultrapure water, extracting with ethyl acetate for multiple times, combining organic layers, drying, concentrating and purifying to obtain benzene sulfinate, and keeping in a dark place and in an oxygen-isolated manner; s3, under the dark and nitrogen conditions, benzene sulfinate prepared in the step S2 is hydrolyzed and refined under the alkaline condition, and sodium benzene sulfinate is obtained.

The application belongs to the technical field of hot melt adhesives, and particularly relates to a detachable structure bonding hot melt adhesive based on a multi-element synergistic self-repairing polyurethane and a synthesis method thereof. The hot melt adhesive is synthesized according to the following molar ratio: 1:2 of polytetramethylene ether glycol or polytrimethylene ether glycol and isophorone diisocyanate or 4,4-diisocyanate dicyclohexyl methane, 1:10 of polytetramethylene ether glycol or polytrimethylene ether glycol and a catalyst ‑5 , 1:4 of 4,4'-diamino diphenyl disulfide or 2,2'-diamino diphenyl disulfide and a diluent, 1:1.2-2.0 of the prepolymer and 4,4'-diamino diphenyl disulfide or 2,2'-diamino diphenyl disulfide, and 1:0.4-2.0 of the prepolymer and 3,4-dihydroxybenzaldehyde. The hot melt adhesive has an aluminum-aluminum shear strength of 4.25-14.23 MPa at room temperature, a shear strength retention rate of 93.04% or more after repeated bonding for 6 times, and excellent mechanical properties at 0-55 DEG C and on various substrates. After being treated at 80 DEG C for 30 minutes, the self-healing efficiency of the tensile strength is 95% or more.

The invention provides a preparation method of a carbon fiber composite material and a preparation method of a welding structure, and belongs to the technical field of composite materials. The preparation method of the carbon fiber composite material comprises the following steps: mixing bisphenol A diglycidyl ether, polypropylene glycol diglycidyl ether and 2, 2 '-diaminodiphenyl disulfide to obtain a Vitrimer resin precursor; the preparation method comprises the following steps: coating a Vitrimer resin precursor on a carbon fiber fabric, and then sequentially carrying out film coating and rolling to obtain an intermediate product; performing first thermocuring treatment on the intermediate product to obtain a sheet; carrying out second thermocuring treatment on the Vitrimer resin precursor to obtain a resin material; multiple layers of sheets are sequentially stacked in the thickness direction of the sheets, a resin material is inserted between every two adjacent layers of sheets, and the carbon fiber composite material is obtained through hot pressing treatment. The invention aims to solve the problems that the prepreg is not easy to store and the curing time of the laminated plate is long in the existing prepreg process.

The application belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing 1-(2,4-dimethylphenyl)thio-N-benzyl-2-naphthylamine by a continuous flow light-heat integrated method. The method is performed in a micro-channel reaction device provided with light and heat. N-benzyl-2-naphthylamine, 2,2',4,4'-tetramethyl diphenyl disulfide and a catalyst sodium iodide are dissolved in acetonitrile solvent to obtain a reaction solution. A blue light is used as a light source of a reaction module, and the temperature is adjusted to 25-60 DEG C. Air or oxygen is introduced into the reaction solution, and magnetic stirring is performed. Then, the gas-liquid mixed reaction solution is input into the reaction module through a peristaltic pump to obtain 1-(2,4-dimethylphenyl)thio-N-benzyl-2-naphthylamine. The application creatively uses the continuous flow light-heat integrated reaction technology to synthesize 1-(2,4-dimethylphenyl)thio-N-benzyl-2-naphthylamine, greatly improves the reaction efficiency, shortens the reaction time, improves the safety and controllability of the reaction, solves the amplification effect of the conventional reaction, and provides a reaction technology without bottleneck amplification for the synthesis of the compound.

The present invention discloses a silicon-based negative electrode material, its preparation method, and application. The main material of the negative electrode material is a tin-doped pre-magnesium silicon oxide material, on the surface of which a carbon layer and a molybdenum disulfide-doped polyphenylene sulfide coating layer are sequentially coated. The preparation method is as follows: S1, silicon, silicon dioxide, and tin are crushed, mixed, and tableted; S2, the tableted material obtained in S1 is sintered to obtain a tin-doped silicon oxide material; S3, the product S2 is crushed and classified to control the particle size distribution; S4, the product S3 is placed in a rotary kiln under an inert atmosphere and heated to the sintering temperature, dimethylcyclopentadienyl magnesium is placed in a gas reactor, sintered, and discharged at room temperature to obtain an intermediate product A; S5, product A and molybdenum disulfide are dispersed in acetylacetone, diphenyl disulfide is added, oxygen is introduced for reaction, and the temperature is raised a second time under a nitrogen atmosphere to obtain a silicon-based negative electrode material coated with molybdenum disulfide-doped polyphenylene sulfide.

The invention discloses a direct coal liquefaction residue pyrolysis viscosity reduction method based on an inhibition-cracking-regulation triple synergistic system, and belongs to the technical field of coal chemical industry. The method comprises the following steps: firstly, carrying out swelling treatment on the direct coal liquefaction residues, adding a modifier into the direct coal liquefaction residues, and carrying out front-end prevention by using the modifier to inhibit the formation of a macromolecular network; adding a nano-scale transition metal catalyst, and uniformly dispersing the nano-scale transition metal catalyst in the modified direct coal liquefaction residues to obtain a sample I, so as to achieve the purpose of catalytic cracking of heavy components at the middle end; finally, diphenyl disulfide is introduced into the first sample, the diphenyl disulfide is automatically decomposed into a free radical terminator in a viscosity peak temperature window, and a free radical polycondensation path causing viscosity soaring and coking is actively intervened and cut off from the molecular level, so that the viscosity is remarkably reduced, and meanwhile, the light oil yield is synchronously increased. According to the method, the problem of viscosity control in the pyrolysis process of the direct coal liquefaction residues can be fundamentally solved, and meanwhile, high-efficiency recovery of high-added-value liquid products is realized.

The invention discloses a solar cell backboard base film and a preparation method, the solar cell backboard base film is composed of a core transparent layer and a PET enhancement layer which are formed by double-layer co-extrusion, and a functional coating which coats the outer side of the PET enhancement layer, and the core transparent layer is composed of polyimide, butylated hydroxytoluene and pentaerythritol stearate; the PET enhancement layer is composed of super bright PET, nano silicon dioxide and aluminum bis-caprylate; the functional coating is prepared from polyurethane, a UV-327 ultraviolet light absorber, butyl hydroxy anisd, a BYK-333 surfactant, diphenyl disulfide, ammonium polyphosphate, N-methyl pyrrolidone and aluminum dicaprylate. The solar cell backboard base film combines collaborative optimization of multifunctional components and advanced process design, has excellent performance in mechanical strength, weather resistance, fireproof performance and processability, and is suitable for high-end application requirements of the solar cell backboard base film.

The invention provides an ABS (Acrylonitrile Butadiene Styrene) material for an electronic product shell and a preparation method of the ABS material, and belongs to the field of ABS materials. The composite material is prepared from the following raw materials in parts by weight: 70 to 85 parts of ABS (Acrylonitrile Butadiene Styrene) resin, 5 to 15 parts of a structured toughening agent, 1 to 5 parts of butadiene functionalized graphite nanosheet filler, 2 to 8 parts of a hyperbranched dynamic cross-linking agent, 0.5 to 3 parts of a styrene-maleic anhydride copolymer, 0.1 to 1 part of diphenyl disulfide, 0.5 to 1.5 parts of a lubricating agent and 0.1 to 0.5 part of an antioxidant. Through precise component selection and structural design, a multi-mechanism collaborative system is constructed, and the strength, toughness and self-repairing performance of the ABS material are synchronously improved.

The invention discloses a low-temperature lithium-sulfur battery based on monatomic catalysis and organic sulfur electrolyte and a preparation method of the low-temperature lithium-sulfur battery. The low-temperature lithium-sulfur battery comprises a lithium negative electrode, a sulfur-carbon positive electrode, an organic sulfur added electrolyte and a monatomic catalyst modified diaphragm, and organic sulfur comprises dimethyl disulfide, tert-butyl disulfide, diphenyl disulfide, p-p-toluene disulfide, bis (2-nitrophenyl) disulfide, dibenzyl disulfide, diallyl disulfide, 4, 4 '-dipyridyl disulfide, 2, 2'-dithiobipyridine, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 The low-temperature lithium-sulfur battery is one or more of 1, 1 '-dithiobis (caprolactam), 3, 3'-dithiobis (1-propanesulfonic acid) disodium salt, 2, 2 '-[dithiobis (methylene)] difuran, 3, 3'-dithiobis (propionitrile) and carbon disulfide. And the organic sulfur is added into the electrolyte to generate an intermediate product organic polysulfide through interaction between the organic sulfur and the polysulfide so as to realize depolymerization of polysulfide clusters in a low-temperature environment.

The invention discloses a diphenyl disulfide / vesicle carbon composite material as well as a preparation method and application thereof, and relates to the technical field of new energy storage materials. Sodium bicarbonate, potassium hydroxide and methyl cellulose are used as raw materials to prepare vesicle carbon, the vesicle carbon is mixed with diphenyl disulfide, and the mixture is heated in vacuum and inert atmosphere for melt diffusion to obtain the diphenyl disulfide / vesicle carbon composite material. Wherein the adsorption effect of the large specific surface of the vesicle carbon and the packaging effect of the hollow structure can relieve the dissolution loss of the diphenyl disulfide, and the open and intercommunicated pore structure in the vesicle carbon can realize the rapid transmission of ions and electrons. Therefore, the diphenyl disulfide / vesicle carbon composite material prepared by the invention has excellent aluminum storage performance and cycling stability, and can improve the electrochemical performance of an aluminum ion battery when being used as a positive electrode material of the aluminum ion battery. In addition, the diphenyl disulfide and the vesicle carbon are compounded, so that the synergistic effect on improving the specific discharge capacity of the composite material is achieved.

The invention provides a method for synthesizing and refining an arbidol hydrochloride intermediate, which comprises the following steps: by taking 5-acetoxy-6-bromo-2-bromomethyl-1-methylindole-3-carboxylic acid ethyl ester, diphenyl disulfide and a reducing agent as raw materials, reacting to obtain a crude product of the arbidol hydrochloride intermediate, and refining the crude product to obtain the arbidol hydrochloride intermediate. The reaction product is 6-bromine-5-hydroxyl-1-methyl-2-phenylthiomethylindole-3-carboxylic acid ethyl ester, and the reaction product is 6-bromine-5-hydroxyl-1-methyl-2 The arbidol hydrochloride intermediate is prepared from diphenyl disulfide, the raw materials are easy to obtain, and the safety is remarkably improved compared with the prior art; meanwhile, a refining process of the product is developed, the high-purity drug intermediate with the purity up to 99.87% and the total single impurity content less than 0.13% can be prepared, and the refining yield is up to 91% or above; the reaction conditions are mild, the synthesis safety is greatly improved, the product quality is remarkably improved, and industrial large-scale preparation is facilitated.

The application discloses a kind of sulfur-containing full solid-state polymer electrolyte membrane for energy storage lithium battery and preparation method thereof, belong to polymer electrolyte technical field.The preparation method of sulfur-containing full solid-state polymer electrolyte membrane provided by the application includes uniformly mixing 2,2'-diamino diphenyl disulfide and sulfurized divinyl, and obtaining polymer solid by polymerization reaction;The mixed solution is obtained by dissolving the polymer solid in dimethyl sulfoxide, lithium bis-trifluoromethanesulfonimide is added to the mixed solution and uniformly mixed to obtain a precursor solution;The precursor solution is cast in a mold, and the sulfur-containing full solid-state polymer electrolyte membrane is obtained after vacuum drying.The electrolyte membrane provided by the application solves the technical problems of low ionic conductivity of traditional solid-state electrolyte, insufficient lithium ion migration number, serious interface polarization and weak oxidation resistance through triple mechanism.At the same time, the lithium metal battery assembled by the sulfur-containing full solid-state polymer electrolyte has excellent electrochemical performance and cycle performance.

The invention discloses a preparation method of a fluorine-substituted trans-olefin compound. Specifically, the invention discloses a preparation method of a compound as shown in a formula VII, which comprises the following steps: in a solvent, in the presence of a free radical initiator and a free radical source, a compound as shown in a formula VI-1 is subjected to an isomerization reaction to prepare the compound as shown in the formula VII, the free radical initiator is dimethyl azobis (2-methylpropionate), and the free radical source is dimethyl azobis (2-methylpropionate). The free radical source is diphenyl disulfide.

The application discloses a preparation method of an ultraviolet curing antistatic coating and relates to the technical field of antistatic coatings. In the application, hydrochloric acid doped polyaniline is used as a core material, 1-butyl-3-methyl imidazole bistrifluoromethanesulfonylimide ionic liquid is introduced as a dopant, and the carrier mobility of the polyaniline is significantly improved. Urea-formaldehyde resin is used as a wall material to coat the surface of the polyaniline to form microcapsules. The microcapsules release polyaniline and ionic liquid compounds after being broken to fill the crack gap. Secondly, 3,3'-dihydroxy diphenyl disulfide and acryloyl chloride are used as raw materials to generate a disulfide bond diacrylate monomer through an esterification reaction. The monomer, tetra(3-mercaptopropionic acid) pentaerythritol ester crosslinking agent and epoxy vinyl ester resin form a three-dimensional crosslinking network. The mercapto groups in the crosslinking agent and the acrylate groups of the disulfide bond diacrylate monomer undergo a click reaction to realize the topological structure reorganization of the molecular chain. The coating prepared by the application has the effect of long-acting antistatic.

The invention discloses an energy storage lithium battery, a sulfur-containing polymer solid-state electrolyte membrane and a preparation method, and belongs to the technical field of polymer electrolytes.A functional polymer is added into the solid-state electrolyte membrane, the functional polymer is formed by quickly crosslinking polyethylene glycol dimethacrylate (PEGDMA) and diphenyl disulfide (DPDS) through the thermal initiation polymerization effect, and the functional polymer is a sulfur-containing polymer solid-state electrolyte membrane and a preparation method of the sulfur-containing polymer solid-state electrolyte membrane. The sulfur-containing polymer solid electrolyte membrane can simultaneously improve the voltage resistance and the high ion conduction performance of the polymer electrolyte, so that the problems of low room-temperature ion conductivity, high interface impedance, poor mechanical property and high crystallinity of the sulfur-containing polymer solid electrolyte membrane in the prior art are solved; and great gain is provided for battery circulation and stability.

The application belongs to the field of novel functional materials, and particularly relates to a high-recovery self-healing polyurethane elastomer material and a preparation method thereof. The self-healing elastomer material is prepared from the following components: 50-100 parts by weight of a polyurethane prepolymer, and 13-28 parts by weight of a chain extender composition. The polyurethane prepolymer is obtained from a polyol with a molecular weight of 2000 and isophorone diisocyanate under catalytic reaction of dibutyltin dilaurate. The chain extender is a combination of a pendant chain chain extender, 4,4'-diamino diphenyl disulfide and 4,4'-diamino diphenyl ethane. The solvent is N,N-dimethylacetamide. The polyurethane elastomer provided by the application has a self-healing performance recovery rate of more than 90% at 60 DEG C for 12 hours, is suitable for precision instrument laboratory floor coating, medical materials and aerospace fields, realizes scratch self-repairing, and prolongs the service life.

The invention relates to the field of rubber materials, and provides a shock absorber oil-resistant high-load nitrile rubber material and a preparation method thereof. The nitrile rubber material is prepared from the following raw materials in parts by weight: 80 to 120 parts of nitrile rubber, 50 to 90 parts of precipitated silicon dioxide, 10 to 30 parts of aramid short fiber, 1 to 4 parts of dicumyl peroxide, 0.5 to 2 parts of insoluble sulfur, 1 to 4 parts of dibenzothiazyl disulfide, 5 to 7 parts of indirect zinc oxide, 1 to 2 parts of stearic acid, 1 to 2 parts of nickel dibutyl dithiocarbamate, 1 to 3 parts of N-isopropyl-N '-phenyl p-phenylenediamine and 10 to 15 parts of oligomer ester. 0.2-3 parts of saturated isoparaffin and 0.2-5 parts of a processing aid. The high-load nitrile rubber material for shock absorber oil resistance has excellent performances such as good elasticity and good sealing performance, and also has the advantages of high hardness, high strength, excellent oil resistance, low compression set and excellent dynamic fatigue performance.

The invention relates to the technical field of batteries, in particular to a secondary battery and a preparation method thereof, a gel electrolyte and an electric device. The secondary battery comprises an outer package, an electrode assembly and a gel electrolyte, the electrode assembly and the gel electrolyte are contained in the outer package, and the gel electrolyte comprises a polymer, a solvent and electrolyte salt; the polymer comprises a copolymer of an acrylate oligomer and a diphenyl disulfide monomer. The secondary battery has a relatively long cycle life.

The application discloses a diphenyl disulfide / vesicle carbon composite material and a preparation method and application thereof, and relates to the technical field of new energy storage materials.The vesicle carbon is prepared by using sodium bicarbonate, potassium hydroxide and methyl cellulose as raw materials, and then the vesicle carbon is mixed with diphenyl disulfide and heated under vacuum and inert atmosphere for melt diffusion, so that the diphenyl disulfide / vesicle carbon composite material is obtained.In the application, the adsorption of the large specific surface of the vesicle carbon and the encapsulation of the hollow structure can alleviate the loss of the diphenyl disulfide, and the open and interconnected pore structure in the vesicle carbon can realize the rapid transmission of ions and electrons.Therefore, the diphenyl disulfide / vesicle carbon composite material prepared by the application has excellent aluminum storage performance and cycle stability, and when the material is used as a positive electrode material of an aluminum ion battery, the electrochemical performance of the aluminum ion battery can be improved.In addition, the diphenyl disulfide and the vesicle carbon have a synergistic effect on improving the specific discharge capacity of the composite material.

The invention relates to 1-mercapto-3-alkyl bicyclo [1.1. 1] pentane and a synthesis method thereof. The invention discloses 1-sulfydryl-3-(perfluoro) alkyl bicyclo [1.1. 1] pentane and a synthesis method of the 1-sulfydryl-3-(perfluoro) alkyl bicyclo [1.1. 1] pentane. The synthesis method comprises the following steps: by taking diphenyl disulfide, [1.1. 1] propeller alkane and halogenated hydrocarbon as raw materials and N-methyl pyrrolidone as a solvent at normal temperature, reacting under a photocatalytic condition, and purifying a crude product through silica gel column chromatography (200-300-mesh silica gel) to synthesize the 1-sulfydryl-3-(perfluoro) alkyl bicyclo [1.1. 1] pentane. The method has the advantages of mild reaction conditions, simple experimental operation, good reaction selectivity, high product yield, easy product separation and the like.

This invention relates to a simple method for preparing photochromic triphenylacrylonitrile compounds. The readily synthesizable 2-(4-bromophenyl)-3,3-diphenylacetonitrile acrylonitrile is reacted with diphenyl disulfide to obtain a sulfide fluorescent compound, which is then oxidized using different oxidants to obtain sulfoxide or sulfone fluorescent compounds. All synthesized fluorescent compounds exhibit photochromic properties in solution. The sulfoxide-containing triphenylacrylonitrile compounds can be recrystallized using different methods to obtain crystals with two conformations, only one of which exhibits photochromic properties. This method is simple to operate and has high yield. The crystal structure of the compounds prepared by this method is beneficial for studying the relationship between solid conformation and photostimulation, and can be applied to memory storage materials.

The application discloses a solid photochromic fluorescent compound containing a sulfoxide group and a synthesis method thereof. A bromine-containing triaryl ethylene fluorescent compound which is easy to synthesize is reacted with a diphenyl disulfide to obtain a sulfide fluorescent compound, and then the sulfide fluorescent compound is oxidized to obtain a sulfoxide fluorescent compound. In addition, through different crystallization methods, the triaryl styrene fluorescent compound containing the sulfoxide group can obtain two kinds of crystal with different packing modes, one of which has photochromic performance, and the relationship between the packing mode and the photochromic performance is conducive to research.

The invention relates to a high-durability self-healing polyimide-based flexible sensing base material and a preparation method of the high-durability self-healing polyimide-based flexible sensing base material. The high-durability self-healing polyimide-based flexible sensing base material is prepared from the following components in parts by weight: 80 to 90 parts of dynamic modified polyimide matrix, 5 to 10 parts of silane coupling agent KH-580 modified Ti < 3 > C < 2 > T < x > MXene, 4 to 8 parts of self-healing microcapsule and 1 to 3 parts of polycaprolactone-polyethylene glycol segmented copolymer, wherein the dynamic modified polyimide matrix is prepared by copolymerization of 3, 3 ', 4, 4'-benzophenone tetracarboxylic dianhydride, 4, 4 '-diaminodiphenyl disulfide and dimercaptopropionic acid; a core material of the self-healing microcapsule is an isocyanate-polyol prepolymer, and a wall material of the self-healing microcapsule is urea resin. The high-durability self-healing polyimide-based flexible sensing base material disclosed by the invention is high in self-healing capability and high in durability.

The application provides a high-heat-resistance self-repairing epoxy resin based on a dynamic disulfide bond, a preparation method thereof, a fiber-reinforced composite material and application, and belongs to the technical field of intelligent composite materials. The preparation method comprises the following steps: S1. mixing bisphenol F diglycidyl ether and 4,4'-methylene di(N,N-diglycidyl aniline), heating and stirring until the mixture is uniform to obtain a mixed epoxy base; S2. mixing the mixed epoxy base with a curing agent 4,4'-diamino diphenyl disulfide, heating and stirring until the mixture is uniform, and then performing vacuum degassing treatment to obtain a prepolymer; and S3. performing a stepwise temperature rising curing reaction on the prepolymer to obtain the high-heat-resistance self-repairing epoxy resin. The high-heat-resistance self-repairing epoxy resin prepared by the application not only retains the inherent high strength and process stability of high-performance epoxy resins, but also is endowed with excellent intelligent damage repair function, the Tg of the high-heat-resistance self-repairing epoxy resin is much higher than that of conventional self-repairing materials, and the mechanical properties, heat resistance and high-efficiency self-repairing capability are simultaneously considered.

This invention relates to a method for preparing high-yield and high-purity polyphenylene sulfide (PPS), belonging to the field of oxidative polymerization. The technical problem solved by this invention is to provide a method for producing PPS with mild reaction conditions and high yield and high purity. This method uses diphenyl disulfide as a raw material, sulfoxide as a solvent, oxygen as an oxidant, and a vanadium-based Lewis acid complex as a catalyst. The main process flow includes feeding, synergistic effect of the catalyst and oxygen, polymerization, filtration, washing, and drying. High-yield and high-purity PPS is obtained through oxidative polymerization at room temperature and pressure. This invention features a simple process flow, mild conditions, and does not require the use of other polymerization aids. It avoids the impact of byproducts such as sodium metal salts generated in many preparation methods on the toughness of the product, and the yield can reach almost 100%, with high product purity.

The present application relates to a preparation method of high-efficiency synthesis of polyphenylene sulfide, and belongs to the field of oxidative polymerization, and mainly solves the technical problem of providing a reaction method with less side reaction, low requirement for equipment, short reaction flow, and simple post-treatment. The method mainly uses diphenyl disulfide as a reactant, dichloromethane as a reaction solvent, a mixture of manganese and Lewis acid as a catalyst for the reaction, and air as an oxidizing agent for the reaction under the above conditions, so that the yield of the product reaches 99%, the chemical stability of the product is high, the mechanical property is also good, and the purity is relatively high. The present application uses air as an oxidizing agent and is under normal pressure, has a simple process flow, mild reaction conditions, and the selection of the catalyst considers the process recovery design, that is, after the catalyst is used, it can be recovered for the next batch of synthesis of polyphenylene sulfide reaction after simple treatment, and has great industrial application value.