71 results about "Dithiol" patented technology

The invention discloses a high-refractive-index photo-thermal dual-curing optical adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials, and the preparation method comprises the following steps: S1, preparation of high-refractive-index resin: placing biphenyl-4, 4 '-dithiol in a nitrogen atmosphere reaction kettle, adding a free radical thermal initiator, heating to 180-200 DEG C, reacting for 1-2 hours, and cooling to room temperature to obtain the high-refractive-index resin; dropwise adding alkenyl resin under the protection of nitrogen, stirring, reacting for 1-2 hours after dropwise adding, and cooling to room temperature to obtain high-refractive-index resin; s2, preparation of the optical adhesive: mixing the alicyclic epoxy resin, the high-refractive-index resin, the toughened resin, the liquid epoxy resin, the cationic photoinitiator and the cationic thermal initiator, and uniformly stirring in a dark place to obtain the adhesive. The problems that a traditional optical adhesive is poor in optical performance stability and unbalanced in mechanical and optical performance are solved. The application potential of preparing the high-performance optical adhesive is realized.

The invention discloses a high-toughness self-repairing plastic runway adhesive based on double-sulfur dynamic crosslinking, which is characterized by comprising the following components in percentage by weight: 57-70% of polyhydric alcohol composition, 5-10% of dithiol, 5-10% of dithiol, 5-10% of dithiol, 5-10% of dithiol, 5-10% 25 to 35% of diisocyanate; 3-8% of a chain extender containing dynamic disulfide bonds; 1-3% of in-situ modified nano cerium dioxide; 0.05 to 0.13 percent of a composite catalyst; 0.3 to 0.7% of a hydrolysis resistant agent; 2.0 to 6.0 percent of flame retardant; 0.2%-0.5% of an antioxidant; wherein the ratio of the total mole number of isocyanate groups in the diisocyanate to the total mole number of hydroxyl groups in the polyol composition and the chain extender containing the dynamic disulfide bonds, namely the mole ratio of NCO to OH is (2.2-3.5): 1. The invention also discloses a preparation method of the composition. According to the invention, by introducing a dynamic disulfide bond (HEDS) and a specific composite catalyst, after a cured adhesive layer generates microcracks, a molecular network of the cured adhesive layer can realize self-repairing through reversible exchange of the disulfide bond, the mechanical property is remarkably recovered, and the service life of a runway is greatly prolonged.

This invention discloses a composite nanozyme that enhances the clinical efficacy of oxaliplatin, its preparation method, and its application. The composite nanozyme consists of indium ruthenium nanozyme and an iliximab embedding and anchoring layer. The indium ruthenium nanozyme consists of indium ruthenium nanoparticles and a carbon-nitrogen framework, with the indium ruthenium nanoparticles loaded on the surface and within the pores of the carbon-nitrogen framework. The iliximab embedding and anchoring layer consists of a dithiol polyethylene glycol coating layer and iliximab. Preparation method: ZIF-8 is prepared by co-precipitation of zinc salt methanol solution and 2-methylimidazole methanol solution, followed by calcination to obtain the carbon-nitrogen framework. The carbon-nitrogen framework dispersion is then stirred in an oil bath with indium nitrate solution and ruthenium trichloride solution to prepare a nanozyme precursor, followed by calcination to obtain indium ruthenium nanozyme. The indium ruthenium nanozyme is dispersed in a dithiol polyethylene glycol solution, and iliximab solution is added dropwise. The resulting solid product is then dried. This invention can solve problems such as strong drug tolerance, insufficient intracellular accumulation, and severe tumor immunosuppression in oxaliplatin treatment.

The application provides a dithiol modified copolymer and a preparation method and application thereof, and particularly relates to the technical field of lithium batteries. In the dithiol modified copolymer, the copolymer is a branched diene-vinyl pyridine copolymer, which is mainly obtained by copolymerization of branched diene and vinyl pyridine. The dithiol modified copolymer provided by the application has a main chain composed of flexible branched diene units, which endows the copolymer with a good elastic skeleton structure; vinyl pyridine is introduced as a functional monomer, so that a pyridine group is formed on the side chain of the copolymer; a dithiol compound introduces a thiol group (-SH) to the copolymer, and finally, the dithiol modified copolymer has a flexible main chain structure, and the side chain simultaneously contains a pyridine group and a thiol group, and has good elasticity and functional characteristics.

The invention belongs to the field of polymer composite materials, and relates to a polyimide aerogel coating material as well as a preparation method and application thereof. The invention provides a preparation method of a polyimide solution, which comprises the following steps: efficiently and quickly carrying out a catalyst-free thiol-alkynyl click polymerization reaction on a dithiol monomer and a diyne monomer under mild conditions to construct a uniform polymer network and obtain a high-uniformity polyimide dilute solution; and then forming a three-dimensional porous aerogel structure through coating, solvent exchange and normal-pressure drying. The prepared aerogel coating material can be used as an aerogel composite coating, a fireproof heat insulation fabric, a heat preservation fireproof coating, a heat management interface material and the like to be applied to the fields of new energy, special protective clothing, building heat insulation and fire prevention, electromagnetic shielding and the like. According to the method, the production process is simplified, the application range of the polyimide aerogel coating in a multifunctional composite material is widened, and the continuous production process of the polyimide aerogel coating is promoted.

Various precursor solutions and methods of 3D printing and other additive manufacturing approaches are provided for the manufacture of articles using photocrosslinkable vinyl shape memory polymers. In various aspects, articles are manufactured by a process comprising (i) exposing a precursor solution to an intensity and frequency of light to initiate photo-polymerization of the precursor solution to form a layer of the article; and (ii) repeating step (i) a number of times to form the article in a layer-by-layer approach; wherein the precursor solution comprises a first polymeric precursor comprising a plurality of vinyl terminated side-chains attached thereto. A vinyl-functionalized, photocrosslinkable SMP used as an example herein is a novel variant of a previously disclosed SMP composition, with higher amounts of vinyl functionalization but similar thermomechanical properties to the SMP library previously disclosed. Moreover, a unique combination of chemistries is disclosed that incorporates the aforementioned vinyl-functionalized SMPs along with acrylate-based crosslinkers. Additional novel compositions are disclosed containing the vinyl-functionalized SMPs with additional dithiol functionalizations, vinyl-functionalized SMPs with dithiol crosslinkers, as well as vinyl-functionalized SMPs with both acrylate-based and dithiol crosslinkers, as another means to tune degradation rates and other material properties. The articles can include a variety of articles such as stents, grafts, external sheaths, and the like. Beneficially, the printed articles can include a plurality of pores having an average diameter of about 50 pm to about 5000 pm, about 500 pm to about 2000 pm, or about 1000 pm even in the absence of a photoblocker.

The application discloses a high-toughness semi-interpenetrating network liquid crystal elastomer with low phase transition temperature and a preparation method and application thereof, and belongs to the technical field of liquid crystal elastomers and intelligent polymer materials. The preparation method comprises the following steps: after linear liquid crystal polyurethane, liquid crystal polymerizable monomers, dithiol, polythiol, a photoinitiator and a thermal catalyst are blended and dissolved, a precursor solution is obtained by mixing the linear liquid crystal polyurethane, a pre-crosslinked film is obtained through thermal crosslinking, and then a free radical polymerization reaction is carried out on the pre-crosslinked film under the condition of mechanical stretching and using ultraviolet light irradiation, so that the high-toughness semi-interpenetrating network liquid crystal elastomer with low phase transition temperature is obtained. According to the application, the semi-interpenetrating network is constructed, so that the flexible long chain of the polymer can effectively dissipate mechanical energy through slippage when being stressed, and the breaking toughness of the material is greatly improved. Meanwhile, the phase transition energy barrier is effectively reduced through the regulation of the liquid crystal monomers, and the elastomer is endowed with the ability to realize large-strain reversible deformation under extremely low thermal stimulation (such as physiological temperature) and extremely excellent actuating function.

The Invention relates to a method Method for making a ruthenium catalyst comprising the steps of - Providing an aromatic dithiol substituted on adjacent aromatic carbon atoms with thiol groups, wherein in a first step an aromatic compound substituted with two leaving groups on adjacent aromatic carbon atoms are reacted with alkali trithiocarbonate to obtain an aromatic benzodithiole-thione, which in a subsequent step is reacted / hydrolysed with a base; - providing a zinc dithiolate compound by reacting the aromatic dithiol with a zinc carboxylate in an organic solvent; Reacting the zinc dithiolate compound with a ruthenium compound wherein X1 and X2 are, independently of each other, are anionic ligands and are the same or different; L and L2 are, independently of each other, neutral electron donor ligands and are the same or different; Ar is an aromatic group which may be substituted and that can be bridged with L, if L is an alkoxy group; - Obtaining a ruthenium catalyst of formula 4 or 4a, wherein R1 to R4 are, independently of each other, are selected from hydrogen, halogen, alkyl, aryl, or R.1 with R3, R3 with R4 or R2 with R4 are forming together an aliphatic or aromatic ring.

The invention relates to a light, thin and flexible TPU (thermoplastic polyurethane) film which comprises the following components in parts by mass: 100-120 parts of TPU master batch, 30-40 parts of polypropylene, 8-10 parts of inorganic hybrid filler, 1-3 parts of antioxidant and 1-3 parts of dispersing agent, the inorganic hybrid filler comprises intercalated montmorillonite and modified carbon nanotubes, and the montmorillonite raw materials comprise montmorillonite, tetraethoxysilane and a modifier. Tetraethoxysilane is used for pre-expanding, octadecyl trimethyl ammonium bromide is used for intercalation modification of montmorillonite, polypyrrole is used for coating, n-dodecanethiol is used for hydrophobization modification of carbon nanotubes, and the carbon nanotubes are used as a filler of the TPU film raw material, so that the overall tensile strength and durability of the system are effectively improved.

The application discloses a functional surface modifier and a preparation method and application thereof, and belongs to the technical field of surface treatment, and comprises the following raw materials in parts by weight: dithiol 25-50 parts, tetramethyldivinyl disilazane 20-40 parts, a photoinitiator 0.2-1 part, a functional reagent 25-50 parts and an organic solvent 100 parts. The functional surface modifier prepared by the application is suitable for modifying the surfaces of materials with different requirements, and has a wide application range and prospect.

The invention relates to a preparation method of an aluminum-doped lithium lanthanum zirconium oxide solid electrolyte, and belongs to the technical field of solid electrolyte materials. Adding lithium carbonate, lanthanum oxide, zirconium oxide, aluminum nitrate and absolute ethyl alcohol into a ball milling tank for ball milling, drying, adding the modified aluminum ion chelating agent, mixing, grinding, sieving, putting into an aluminum oxide crucible, and pre-sintering to obtain an LLZO precursor; grinding and sieving the LLZO precursor, adding a polyvinyl alcohol solution, mixing, and pressing into a wafer; and placing the wafer in an alumina crucible, and carrying out high-temperature sintering to obtain the lithium lanthanum zirconium oxide solid electrolyte doped with the aluminum element. The modified aluminum ion chelating agent is prepared from (11-mercaptoundecyl)-trimethyl ammonium bromide, methylbenzene, biphenyl-4, 4 '-dithiol, triethylamine, lanthanum nitrate and stannous octoate; the lithium lanthanum zirconium oxide solid electrolyte prepared by the invention has relatively high room-temperature ionic conductivity and excellent chemical stability and interface stability.

This invention provides an application of a 1,4-phenylenediol-modified titanium dioxide / nickel hydroxide heterojunction catalyst as a membrane coating material in lithium-sulfur batteries, belonging to the field of lithium-sulfur battery technology. The catalyst is constructed using a transition metal oxide heterojunction TiO2 / Ni(OH)2 as a substrate, modified by in-situ growth of the sulfur-containing organic compound 1,4-phenylenediol on its surface. This design, through the synergistic effect of the TiO2 / Ni(OH)2 heterojunction and the organic sulfur compound, significantly enhances the physicochemical adsorption and catalytic conversion efficiency of lithium polysulfides, thereby effectively suppressing the shuttle effect and improving battery cycle stability and reaction kinetics. This invention not only provides an efficient solution to the polysulfide shuttle problem but also offers a feasible path for the commercial application of lithium-sulfur batteries under high sulfur loading and low electrolyte conditions, which is of great significance for promoting the development of high-energy-density energy storage systems.

The application discloses a kind of UV curing heat preservation coating and preparation method thereof, it is related to paint technical field.The application first with 2-ethyl-2-(mercapto methyl)-1,3-propanedithiol and pentaerythritol triallyl ether as raw material preparation UV curing coating, then join modified phase change microcapsule material as heat preservation auxiliary agent;Multi-functional group raw material can form highly crosslinked polymer network structure, improve the mechanical properties of coating after curing;Using oxidized foam metal load sugar alcohol mixture as the core material of phase change microcapsule, doped with p-fluorocinnamyl chloride modified polyamide as the shell material of phase change microcapsule, then interface polymerization method is used to prepare modified phase change microcapsule material, modified phase change material can more quickly absorb or release heat, improve the heat preservation effect, the surface of p-fluorocinnamyl chloride modified phase change microcapsule material contains double bond, can participate in curing reaction directly with resin network bonding, enhance interface strength.The UV curing heat preservation coating prepared by the application improves the heat preservation effect of coating.

The invention discloses a lithium battery fast charging electrolyte, which comprises an organic solvent, a lithium salt and an additive according to a mass ratio of (65-85): (10-25): (3-15), the organic solvent is composed of carboxylic ester, cyclic carbonate and chain carbonate in a mass ratio of (20-40): (10-20): (40-60); the lithium salt is a compound of lithium hexafluorophosphate (LiPF6) and lithium bis (oxalate) borate (LiBOB) in a mass ratio of (5-8): (1-3); the additive is one or two of 1, 3-propanedithiol, 2, 3-butanedithiol and 1, 4-butanedithiol, the addition amount of the additive is 0.5%-3% of the total mass of the electrolyte, and the thiol compound can capture high-temperature free radicals and inhibit solvent decomposition. According to the invention, the solvent composition of the fast-charging electrolyte is mainly protected, and the fast-charging and fast-discharging performance and the high-temperature stability are synergistically improved through the specific ratio of the lithium salt compound (LiPF6 and LiBOB) and the additive combination (thiol compounds and fluoro carboxylic ester derivatives) and all the components.

The application discloses a kind of based on dithio metal complex doped polymer resistance change storage material and its preparation method and application, belong to data storage technical field.The storage material is with cadmium halide synthesis complex with bipyridine (Bpy) as ligand, and with polyvinylpyrrolidone (PVP) compound and obtained composite material.Based on the storage performance of pure cadmium complex device is poor, and the switch ratio is only 10 2.32 ~10 3.18 , with halogen from I to SCN, storage performance gradually improves.After being compounded with PVP, Cl base and SCN base device exhibits good ternary storage behavior (ternary yield is 65% and 55%), and the current switch ratio reaches 10 6.13 :10 3.80 :1, and good device stability is shown, and it is expected to be applied to construct high-performance halogen-based memory.Raw material is widely sourced, and the preparation method is simple, and the product has excellent performance, and has significant economic and social benefits.

The invention relates to the technical field of photocatalytic materials, in particular to a Si-COF photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: taking 2, 5-diamino-1, 4-benzene dithiol dihydrochloride and tetra (4-formylphenyl) silane as raw materials, carrying out aldimine condensation reaction, and carrying out condensation on amino and sulfydryl of the 2, 5-diamino-1, 4-benzene dithiol dihydrochloride and aromatic aldehyde of the tetra (4-formylphenyl) silane to form benzobithiazole structural sites, so as to obtain the Si-COF photocatalyst. The photocatalyst has very strong self-assembly ability and can produce H2O2 without a sacrificial agent, when the dosage of the photocatalyst is 5 mg, the yield of H2O2 reaches up to 6059.86 [mu] mol.g <-1 >. H <-1 > / 100 mmol.L <-1 >, the operation is simple and convenient, the condition is mild, and the photocatalyst is suitable for green and efficient production of H2O2.

A non-aqueous electrolyte secondary battery includes a positive electrode including a positive electrode active material, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and a non-aqueous liquid electrolyte, wherein the non-aqueous liquid electrolyte includes a non-aqueous solvent, and 6-alkylthio-1,3,5-triazine-2,4-dithiol; at least a portion of the 6-alkylthio-1,3,5-triazine-2,4-dithiol is dissolved in the non-aqueous solvent; and the alkylthio group at a 6th position preferably has an alkyl group with 1 to 8 carbon atoms.

The application discloses a pressure-sensitive film based on force response cholesteric main chain liquid crystal oligomer, and the structure of the pressure-sensitive film based on force response cholesteric main chain liquid crystal oligomer is sequentially PDMS layer, cholesteric liquid crystal oligomer layer and substrate layer from top to bottom; the cholesteric liquid crystal oligomer layer is obtained by reacting diacrylate liquid crystal monomer and dithiol; and the polymerization degree of the cholesteric liquid crystal oligomer layer is 2-10. The pressure-sensitive film based on force response cholesteric main chain liquid crystal oligomer disclosed by the application uses the oligomer with a polymerization degree of 2-10 obtained by polymerizing diacrylate liquid crystal monomer as the cholesteric liquid crystal oligomer layer, so that the visual degree is higher, the threshold of force response is controllable, and there is no liquid component in the pressure-sensitive film, so that the pressure-sensitive film is easier to assemble and more stable.

This invention discloses the preparation of furan[3,4-d]-1,3,2-dioxathiol-4(3aH)-one, dihydro-,2-oxide, comprising the following steps: 1. Dissolving D-isoascorbic acid in water and adding sodium carbonate; 2. Adding 40 μL of 50% H2O2 aqueous solution dropwise. o C. Stir the reaction, then heat to 80°C. o C. Stir the reaction, filter while hot, wash with water to obtain a colorless and clear filtrate; 2. Quench the reaction with hydrochloric acid dropwise to acidity, evaporate to dryness under high vacuum to obtain a white solid; reflux with ethyl acetate, filter, evaporate the filtrate by rotary evaporation to obtain a crude intermediate, which is then processed to obtain a white needle-like crystalline intermediate; 3. Dissolve the white needle-like crystalline intermediate in acetonitrile, add thionyl chloride dropwise, and stir the reaction; 4. Pour the reaction solution into ice water, extract with dichloromethane, dry, filter, and evaporate by rotary evaporation to obtain a yellow solid crude product; further processing yields the product. The advantages of this invention are: simple process route, mild and easy-to-control reaction, low purification difficulty, few by-products, and high yield and purity.

This invention relates to the field of coating technology, specifically to a printing coating for colored paper and its preparation method. In the preparation process, this invention incorporates dithiol dihydroxyacetic acid to increase the crosslinking points of the system, and trimethylolpropane tris(2-methyl-1-azacyclopropane propionate) containing an unstable aziridine three-membered ring to improve the degree of crosslinking. It also introduces isoborneol methacrylate to reduce internal stress, effectively balancing the crosslinking density and volume shrinkage of the system, resulting in a coating with excellent adhesion. Furthermore, this invention adds the bifunctional monomer 1,6-hexanediol diacrylate to make the network structure more uniform and provide anti-photooxidation properties, making the system less prone to oxidative discoloration. The addition of tripropylene glycol diacrylate reduces the risk of yellowing caused by small molecule migration. Therefore, the coating obtained in this way has significant anti-yellowing effects, preventing color distortion of colored paper and maintaining the appearance stability of the colored paper.

The application relates to the technical field of medical materials, in particular to an antioxidant and bacteriostatic chitosan hydrogel and a preparation method thereof. The method is characterized in that lipoic acid is first grafted on a chitosan molecular chain to prepare modified chitosan; then the modified chitosan is mixed with a functional additive, a photo irradiation is performed to initiate ring-opening crosslinking of a lipoic acid disulfide five-membered ring, meanwhile, a mercapto-dithiol exchange reaction occurs between mercapto groups on the surface of the functional additive and a disulfide bond, and a three-dimensional network hydrogel is rapidly formed; the functional additive is prepared through ultraviolet light reaction of mercapto titanium oxide microspheres, a synergistic bacteriostatic agent and a modifier, and a three-dimensional bacteriostatic network layer is formed on the surface of the titanium oxide microspheres; the chitosan hydrogel prepared by the method has excellent antibacterial performance and good antioxidant performance, is suitable for the biomedical field such as wound dressings, tissue engineering scaffolds and drug sustained-release carriers, and has a wide application prospect.

The invention discloses thermoplastic polyamide as well as a preparation method and application thereof, and the preparation method comprises the following steps: mixing a carboxyl monomer, a hydroxyl monomer, 3, 6-dioxa-1, 8-octane dithiol, a catalyst and a solvent, carrying out sulfydryl-olefin click reaction under the protection of inert gas, and carrying out post-treatment to obtain the thermoplastic polyamide, wherein the structural formula of the carboxyl monomer is shown in the specification, and the structural formula of the hydroxyl monomer is shown in the specification; the mass ratio of the carboxyl monomer to the hydroxyl monomer to the 3, 6-dioxa-1, 8-octane dithiol is (9.7 to 14.2) to (1.3 to 5.2) to 5.5. The invention provides high molecular weight bio-based functional polyamide prepared through mercapto click polymerization, the polyamide has reactive side groups including carboxyl and hydroxyl, so that new chemical covalent bonds are formed in the high-temperature processing process, a polymer network is converted from a linear type to a cross-linked type, and further the cementing performance is enhanced.

A polymer comprising chain transfer agent residues and a polymeric monomer is provided. The monomer may comprise (meth / ethyl / propyl)acrylamide or a derivative thereof; (meth / ethyl / propyl)acrylic acid or an acidic derivative thereof; C1-C18 alkyl (meth / ethyl / propyl)acrylate; hydroxyl-functionalized C1-C18 alkyl (meth / ethyl / propyl)acrylate, or combinations thereof. The chain transfer agent may be water-compatible. The chain transfer agent may comprise homocysteine ​​or a derivative thereof; C2-C18 monothiols and dithiols; C3-C12 ethylene glycol monothiols and dithiols; mercaptoacetic acid or a derivative thereof; or similar substances; or combinations thereof. At least one polymer terminus of the polymer may comprise a chain transfer agent residue. The connection between the polymer terminus and the chain transfer agent residue may comprise a sulfur atom. A method for preparing such a polymer is also provided.

An oil product mercaptan sulfur standard solution comprises n-dodecanethiol and isooctane, and the content of hydrogen sulfide in the n-dodecanethiol is lower than 3 [mu] g / g, more preferably lower than 1 [mu] g / g; the purity of isooctane is greater than 99.5 wt%, more preferably greater than 99.9 wt%, and the change amplitude of the concentration of mercaptan sulfur in the standard solution within 12 months is limited to 2%, more preferably less than 1%. The mercaptan sulfur standard solution in the oil product uses isooctane as a solvent, the molecular structure is closer to that of light fuel oil, but the singleness of the structure can be ensured, and the quality stability can be ensured; n-dodecanethiol is used as a source of mercaptan sulfur, so that high content and single source of mercaptan sulfur are ensured, and the change amplitude of the mercaptan sulfur concentration of the obtained standard solution within one year can be less than 2%.

Disclosed is a photocurable composition containing a dithiol compound having a disulfide bond, a compound having two ethylenically unsaturated groups, a hydrogen abstraction type photoradical generator, and an intramolecular cleavage type photoradical generator.

Metal-protein conjugates for use in mass cytometry and methods of making the same are provided. The metal-protein conjugates may have a metal directly bound to the protein, or have a metal attached to the protein through a linking moiety. The metal-protein conjugates include mercury-chelated triazole-containing antibody complexes and methods of their formation from derivatized antibodies and sulfonyl azides.

This invention provides a method for preparing small-particle-size sulfide solid electrolytes and their applications. Under an inert atmosphere, a sulfide solid electrolyte precursor is mixed with a first solvent and reacted. The first solvent is selected from at least one of ethylenediamine, N,N-dimethylacetamide, and 1,2-ethylenedithiol. The mixture is then further mixed with a second solvent, and stirred to precipitate the sulfide solid electrolyte. The second solvent is selected from at least one of n-hexane, n-heptane, ethyl acetate, ethyl propionate, and N,N-dimethylacetamide. Solvent separation, drying, and heat treatment are then performed. This method synthesizes the sulfide solid electrolyte in the first solvent, which is then directly transferred to the second solvent, allowing the sulfide solid electrolyte to precipitate. Direct solvent separation eliminates the crystallization process, significantly reducing time and costs. The method is simple and efficient, resulting in high purity and high ionic conductivity. The resulting battery exhibits high discharge capacity, excellent cycle performance, rate capability, and limiting current density.

The invention discloses naphthyl-bis (thioethyl acrylate) as shown in a formula I and a preparation method and application thereof. A two-step synthesis process of oxygen-sulfur exchange and nucleophilic substitution is adopted, and the method comprises the following steps: step I, oxygen-sulfur exchange reaction: 1, 5-naphthalene diphenol and CS2 are subjected to nucleophilic addition under an alkaline condition, hydroxyl oxygen atoms attack carbon atoms of CS2, and a sodium xanthate intermediate is formed; after acidification, the sulfur anions convert phenolic hydroxyl groups into thiol groups through intramolecular nucleophilic attack. In the step II, two sulfydryl groups in 1, 5-naphthalene dithiol serve as nucleophilic groups, sulfur anions are formed under the alkaline condition, alpha-carbon of chloroethyl acrylate is attacked, nucleophilic substitution is carried out, and HCl is released. The generated naphthyl-bis (thioethyl acrylate) has the characteristics of high purity, high light transmittance and large refractive index, and can be used for preparing a modified acrylic optical material with relatively high refractive index and high light transmittance.

The invention discloses a lithium ion battery electrolyte additive as well as a preparation method and application thereof, and belongs to the technical field of secondary batteries, the preparation method of the lithium ion battery electrolyte additive comprises the following steps: carrying out click reaction on 3, 6-dioxa-1, 8-octane dithiol and vinylethylene carbonate in a molar ratio of 1: 2 under ultraviolet light to obtain 3, 6-dioxa-1, 8-octane dithiol and vinylethylene carbonate; the preparation method comprises the following steps: reacting a carbonate group with an ether group to obtain a reaction solution, grafting the carbonate group with an electron withdrawing characteristic to the ether group with an electron donating characteristic to adjust electron distribution, and successfully synthesizing the lithium ion battery electrolyte additive with ether group and ester group through a click reaction. And the product in the reaction liquid is purified to obtain the lithium ion battery electrolyte additive, so that the oxidation stability of the lithium ion battery electrolyte can be improved.

The invention belongs to the field of functional macromolecules, and particularly relates to a detachable and repairable epoxy vitrimer based on a dynamic carbon-sulfur bond and a preparation method of the detachable and repairable epoxy vitrimer based on the dynamic carbon-sulfur bond, and the detachable and repairable epoxy vitrimer is prepared by taking diphenylmethane bismaleimide, trimethylolpropane triglycidyl ether, dimercaptodiphenyl sulfide or octyldithiol and triethylamine as raw materials, and carrying out curing reaction at 50-150 DEG C for more than 4 hours. After complete curing, the epoxy vitrimer has good solvent resistance, can be completely disassembled in a specific sulfydryl solvent at the same time, and in addition, can realize hot-pressing recovery and remolding at a high temperature.