52 results about "Dodecylmercaptan" patented technology

The application belongs to the technical field of lithium ion battery adhesives, and particularly relates to a hyperbranched network polyacrylic acid resin special for silicon-carbon negative electrodes, a preparation method and application thereof. The hyperbranched network polyacrylic acid resin special for silicon-carbon negative electrodes comprises, by mass fraction, 3-10 parts of water-based acrylic acid resin, 4-10 parts of monomer A, 2-6 parts of monomer B, 2-6 parts of monomer C, 60-80 parts of solvent, 0.1-0.2 parts of chain extender, 1-8 parts of crosslinking agent and 0.5-1 part of silane coupling agent. The monomer A is an acrylic ester monomer, the monomer B is an acrylamide monomer, the monomer C is at least one selected from an allyl amine monomer and an acrylonitrile monomer, and the chain extender is at least one selected from dodecyl mercaptan and 2-mercaptoethanol. The polyacrylic acid resin has high viscosity and peeling strength, and the prepared lithium ion battery negative electrode material has high discharge specific capacity and cycle performance.

The invention relates to an electroplated coating protective agent and a preparation method thereof, and belongs to the technical field of electroplated coating protective agents, and the protective agent comprises the following raw materials: main salt, auxiliary salt, a composite complexing agent, 1-docosanethiol, a sealing agent, absolute ethyl alcohol and deionized water. The succinic acid, the N-sodium lauroyl sarcosinate and the citrazinic acid are used as the composite complexing agent, and starting from different aspects of activating the surface of the coating, accelerating the growth of the protective film layer and increasing the compactness of the protective film layer, the prepared protective agent can effectively improve the corrosion resistance effect of the coating; and the added 1-docosanethiol is used for reducing the defect area of the protective film layer and further effectively improving the corrosion resistance of the protective film. Besides, chromic nitrate is used as a main salt, cerous sulfate and sodium molybdate are used as auxiliary salts, and sodium silicate is used as a sealing agent, so that the prepared protective agent can effectively have remarkable salt spray resistance, and meanwhile, the appearance quality of a formed film layer can also be improved.

The invention relates to the technical field of chemical engineering, and discloses a separation method of tert-dodecyl mercaptan reaction liquid. According to the separation method, a specific sulfone substance is adopted as an extraction agent, and the specific sulfone substance and a tert-dodecyl mercaptan reaction solution to be separated are subjected to extractive distillation in an extractive distillation tower, so that high-purity tetra-polypropylene can be obtained at the top of the extractive distillation tower; and rectifying and separating tower bottoms of the extractive distillation tower to obtain high-purity tert-dodecyl mercaptan. Therefore, according to the separation method, the separation purity of the tetra-polypropylene and the tert-dodecyl mercaptan can be obviously improved, and the problem that the tetra-polypropylene and the tert-dodecyl mercaptan are difficult to separate in the prior art is solved.

The invention belongs to the field of organic matter synthesis, and particularly discloses a preparation method of tert-dodecyl mercaptan, which is characterized in that hydrogen sulfide and dodecene are used as raw materials, and an addition reaction is performed under the catalytic action of a solid acid catalyst by adopting a liquid-solid heterogeneous process and a fixed bed reactor to obtain the tert-dodecyl mercaptan. The continuous liquid-solid reaction is realized, the diffusion time of hydrogen sulfide to a liquid phase main body is shortened, the heat capacity and the heat transfer coefficient of a reaction system are improved, the catalytic efficiency of the catalyst and the temperature controllability of the reaction process are improved, and the reactor design is simplified. Under proper operation conditions, the conversion per pass of dodecene is greater than or equal to 85%, the selectivity is close to 100%, the technological process is simple, few three wastes are generated, treatment is easy, and the method is suitable for industrial production.

The invention discloses a method for improving the selectivity of electrocatalytically reducing acetylene into 1, 3-butadiene by using a copper hydroxide hydrophobic nano array, which comprises the following steps: soaking a copper mesh in a mixed solution of NaOH and (NH4) 2S2O8 to obtain a Cu (OH) 2 self-supporting nano array, and then soaking in an ethanol solution of 1-dodecyl mercaptan to obtain a Cu (OH) 2 hydrophobic self-supporting nano array modified by 1-dodecyl mercaptan. A hot press is adopted to tightly press the dried hydrophobic self-supporting nano array and carbon paper to form a working electrode, a cathode chamber and an anode chamber are separated through an anion exchange membrane, electrolyte is composed of a KOH solution, and a peristaltic pump is used to enable a liquid phase to continuously circulate. According to the method, acetylene is subjected to electrocatalytic reduction to obtain 1, 3-butadiene by adopting a three-electrode system, and high-selectivity conversion of acetylene into 1, 3-butadiene is realized.

The invention relates to the technical field of PCB (Printed Circuit Board) photoresist materials, in particular to a preparation method of alkali-soluble resin for PCB photoresistance, which comprises the following steps: preparing raw materials and monomer raw materials: methacrylic acid, styrene, hydroxyethyl acrylate and maleic anhydride-perfluoroalkyl vinyl ether copolymer, initiators: benzoyl peroxide and azodiisobutyronitrile, a chain transfer agent: lauryl mercaptan, and a solvent: 1, 2-dichloroethane; the crosslinking auxiliary agent is N-hydroxymethyl acrylamide and a hindered amine light stabilizer, the solvent is a mixed solvent of toluene and acetone, and the monomer raw materials are subjected to reduced pressure distillation to remove impurities and moisture. According to the preparation method of the alkali-soluble resin for the PCB photoresist, the molecular weight and molecular weight distribution of the alkali-soluble resin can be accurately controlled by utilizing an active free radical polymerization technology, so that the alkali-soluble resin is higher in alkali solubility, higher in dissolution rate and capable of being rapidly and completely dissolved; and the developing efficiency and the developing precision in the manufacturing process of the PCB photoresist are greatly improved, so that the quality and the stability of a photoetching pattern are improved.

The present invention relates to the field of quantum dot reflective film technology, disclosing a high-stability quantum dot reflective film for display and its preparation method. The film comprises a three-layer structure, A / B / A. The raw materials for layer A include a matrix resin and an antistatic agent; the raw materials for layer B include a matrix resin and fluorescent quantum dot composite microspheres. The fluorescent quantum dot composite microspheres comprise fluorescent quantum dots whose surfaces have been passivated with tert-dodecyl mercaptan and a cycloolefin polymer coating the surfaces. The method first passivates surface defects of the fluorescent quantum dot material with alkyl mercaptan, then uses a cycloolefin polymer as a secondary shell material. The composite particles are mixed with the matrix resin. The resulting quantum dot reflective film exhibits high fluorescence efficiency and wide color gamut display capabilities, while also exhibiting superhydrophobicity and anti-oxidative chemical stability.

The present invention relates to a process for the production of specialty mercaptans from C4 oligomerization product. The oligomer product from the commercial C4 oligomerization process is separated in desired fractions of C8 and C12 olefins and these streams are further used as feed stock for the production of the specialty mercaptans such as tert octyl mercaptan (TOM) & tert dodecyl mercaptan (TDM). These fractionated oligomer stream (C8 and C12) from the C4 oligomerization process reacts with hydrogen sulfide in presence of pretreated cation exchange resin catalyst using appropriate inhibitors such as amine precursors, nitriles and metals to produce respective sulfur compounds tert-octyl mercaptan (TOM) and tert dodecyl mercaptan (TDM).

Discloses an aqueous antimicrobial coating composition comprising: (A) a polymer obtained by a multistage polymerisation and composed of: 75% to 95% of a first-stage polymer and from 5% to 25% of a second-stage polymer; wherein the first-stage polymer comprises: monoethylenically unsaturated functional monomers carrying at least one functional group selected from a carboxyl, carboxylic anhydride, sulfonic acid, amide, sulfonate, phosphoric acid, phosphonate, phosphate, or hydroxyl group (e.g. acrylic acid, acrylamide); <1.0% of a monomers bearing imidazole, benzotriazole, or benzimidazole; and monoethylenically unsaturated nonionic monomers (e.g. alkyl acrylate); wherein the second-stage polymer has MW=8000 to 30000 g / mol and comprises: residues of C6-C24 alkyl thiol (e.g. dodecyl mercaptan); monomers bearing imidazole, benzotriazole, or benzimidazole (e.g. vinyl imidazole); and monomers of alkyl acrylate; wherein the monomers bearing imidazole, benzotriazole, or benzimidazole in a multistage polymer are present at a total concentration of 0.5% to 8%; and (B) 1 to 10000 ppm of a silver, wherein the mol ratio of monomers bearing imidazole, benzotriazole, or benzimidazole to silver is greater than 4; and (C) <500 ppm of coagulum (coagulates having diameter>44 micrometers); and a method of preparing such aqueous antimicrobial composition and a coating composition comprising such aqueous antimicrobial composition and a pigment.

The invention provides a P and Mo modified Y type molecular sieve catalyst and a preparation method of tert-dodecyl mercaptan. The method comprises the following steps: performing P salt preliminary modification on a Y-type molecular sieve by adopting a water bath heating method to reduce strong acid central sites of the molecular sieve and increase the number of B acids, and the B acid sites can effectively adsorb S elements and enhance the activity of the molecular sieve to obtain a P-modified precursor; active metal molybdenum is deposited on the P-modified molecular sieve precursor through an electro-deposition method, Mo modification can perform dealumination on a molecular sieve framework, the Si / Al ratio is increased, the total acid density is reduced, and the desorption capacity of a product is improved; pulse electrodeposition is combined with a complexing agent to regulate and control nucleation and growth of molybdenum, deposited molybdenum salt is combined with the carrier on the surface of the molecular sieve in a high-dispersion single crystal or small cluster form, combination of metal and the carrier is enhanced, and the catalyst has good catalytic performance when applied to hydrogen sulfide addition reaction. The catalyst prepared by the method provided by the invention is suitable for synthesis of tert-dodecyl mercaptan by addition of hydrogen sulfide to tetra-polypropylene, and the product is high in yield and good in stability.

The invention discloses a foaming agent as well as a preparation method and application thereof, and belongs to the technical field of mineral separation. The foaming agent comprises the following raw materials in percentage by mass: 80%-96% of No.2 oil and 1%-22% of lauryl mercaptan. The foaming agent is prepared by the following steps: compounding and modifying No.2 oil, and uniformly mixing the No.2 oil with lauryl mercaptan according to a certain mass ratio, so as to obtain modified No.2 oil; the modified foaming agent not only has the characteristics of good foam brittleness and good flowability, but also can strengthen a collecting agent for sulphide ore, and can achieve the purpose of improving the concentrate grade and the recovery rate at the same time.

The invention discloses a high-efficiency comprehensive recovery and smelting method for low-grade tungsten-molybdenum ore, which belongs to the field of tungsten-molybdenum metallurgy technology, including: grinding the ore to 40-80% of -0.074mm, making a 30-50% concentration slurry; adding sodium carbonate to adjust the pH to 8-10, using dodecyl mercaptan and oleic acid mixed flotation to obtain a tungsten-molybdenum mixed concentrate; passing the concentrate slurry through oxygen pressure oxidation at 120-150°C and 0.5-2.0MPa for 1-5h; filtering the filtrate and extracting and separating it to obtain ammonium molybdate and ammonium tungstate products. This method effectively solves the technical problems of low flotation recovery of tungsten-molybdenum ore, difficulty in obtaining tungsten and molybdenum concentrate products by flotation, and large amounts of tungsten and molybdenum resources being wasted or unable to be effectively developed.

The application relates to the technical field of ABS packaging bottles, and more specifically to an ultraviolet-resistant ABS material, a preparation method thereof and a packaging bottle. An ultraviolet-resistant ABS material comprises the following raw materials in parts by weight: 50-80 parts of styrene, 14-26 parts of acrylonitrile, 12-18 parts of a benzotriazole ultraviolet-resistant absorber, 8-14 parts of butadiene, 0.1-0.9 parts of benzoyl peroxide, 0.1-0.5 parts of tertiary dodecyl mercaptan and 40-60 parts of toluene; the benzotriazole ultraviolet-resistant absorber comprises the following raw materials in mole: 1-3 parts of hydroxyethyl methacrylate, 2-4 parts of toluene-3,5-diisocyanate and 1-3 parts of a polyhydroxy-containing ultraviolet-resistant absorber. The ultraviolet-resistant ABS material has excellent ultraviolet-resistant performance and migration resistance.

The application provides a catalyst for synthesizing tertiary dodecyl mercaptan from triisobutene, a preparation method and use thereof. The method comprises the following steps: preparing a silicon source mixed solution A, preparing a gallium source mixed solution B, and preparing a structure directing agent mixed solution C; adding A into C, stirring, and then adding B to obtain a sol-like substance; adding a cerium source and / or a lanthanum source and an alkyl polyamine solution, stirring to obtain a mixed solution D, and continuously stirring to obtain a powder after drying; and calcining the powder to obtain a unit point rare earth regulated Si-Ga nanomaterial. The catalyst has excellent activity and super-long stability (more than 800 h) in a reaction for synthesizing tertiary dodecyl mercaptan from triisobutene as a raw material, and can be used for industrial production.

Disclosed is an aqueous antimicrobial coating composition comprising: (A) a polymer obtained by multi-stage polymerization and consisting of: 75% to 95% of a first stage polymer and 5% to 25% of a second stage polymer; wherein the first stage polymer comprises: a monoethylenically unsaturated functional monomer (e.g., acrylic acid, acrylamide) carrying at least one functional group selected from carboxyl, carboxylic anhydride, sulfonic acid, amide, sulfonate ester, phosphoric acid, phosphonate ester, phosphate ester or hydroxyl group; lt; 1.0% of a monomer with imidazole, benzotriazole or benzimidazole; and a monoethylenically unsaturated nonionic monomer (e.g., an alkyl acrylate); wherein the second stage polymer has a MW = 8000 g / mol to 30000 g / mol and comprises: a residue of a C6-C24 alkyl mercaptan (e.g., dodecyl mercaptan); a monomer bearing an imidazole, a benzotriazole, or a benzimidazole (e.g., a vinyl imidazole); and an alkyl acrylate monomer; wherein the imidazole, benzotriazole or benzimidazole bearing monomers are present at a total concentration of 0.5% to 8% in the multistage polymer; and (B) from 1 ppm to 10000 ppm of silver, wherein the molar ratio of the monomer bearing the imidazole, benzotriazole or benzimidazole to silver is greater than 4; and (C) lt; 500 ppm of coagulum (diameter gt; a coagulation of 44 microns); as well as a method of preparing such an aqueous antimicrobial composition and a coating composition comprising such an aqueous antimicrobial composition and a pigment.

The invention provides a Ni9S8-coated Au core-shell nanocrystal and a preparation method thereof, the Ni9S8-coated Au core-shell nanocrystal comprises an inner core and an outer shell wrapping the inner core, the inner core is Ni9S8, and the outer shell is Au. The preparation method comprises the following steps: mixing nickel diethyldithiocarbamate with oleylamine, 1-octadecene and 1-dodecyl mercaptan to form a uniform solution; under a protective atmosphere, heating the uniform solution to a reaction temperature, and carrying out a reaction to obtain a reaction solution; adding a tri-n-octylphosphine solution of chloroauric acid into the reaction solution, and reacting at the reaction temperature; and cooling the obtained reaction solution to room temperature, adding a mixed solution of a polar solvent and a non-polar solvent, separating a solid product, and drying to obtain the Ni9S8-coated Au core-shell nanocrystal. Due to the unique structure and potential properties of the Ni9S8-coated Au core-shell nanocrystal, the Ni9S8-coated Au core-shell nanocrystal has wide application potential in the fields of catalysis, energy storage, sensing and the like.

The invention discloses a modified polystyrene material, a preparation method and a light diffusion plate using the modified polystyrene material, relates to the technical field of light diffusion plate materials, and belongs to the patent publication number C08L53 / 02. The preparation method of the modified polystyrene material comprises the following steps: mixing a styrene monomer, an alpha-methyl styrene monomer, vinyl functionalized cage type silsesquioxane, benzoyl peroxide and lauryl mercaptan, and carrying out polymerization reaction under the protection of nitrogen to obtain a polystyrene prepolymer; the preparation method comprises the following steps: dispersing lamellar zirconium phosphate nanosheets in absolute ethyl alcohol, adding gamma-(methacryloyloxy) propyltrimethoxysilane and glacial acetic acid, and performing reflux reaction to obtain coupling agent modified zirconium phosphate nanosheets; crushing the polystyrene prepolymer, premixing with the coupling agent modified zirconium phosphate nanosheets, the antioxidant and the lubricant at a high speed, drying, feeding into a double-screw extruder for melt blending, extruding, cooling, pelletizing and drying to obtain the modified polystyrene material. The modified polystyrene material prepared by the invention has excellent heat resistance.

The invention belongs to the technical field of lubricants, and discloses a lubricant containing Guerbet alcohol derivatives and a preparation method and application thereof. The lubricant is prepared from the following components in parts by weight: 2 to 6 parts of Guerbet alcohol derivative, 0.2 to 1 part of sulfurized isobutylene, 0.05 to 0.3 part of tungsten disulfide nanosheet, 0.01 to 0.1 part of surface modified fullerene, 0.5 to 1.5 parts of triisopropanolamine borate, 80 to 95 parts of 2-octyl-dodecyl cyclopentane, 0.3 to 0.8 part of antioxidant and 0.1 to 0.5 part of antirust agent. The Guerbet alcohol derivative is an ester derivative of Guerbet alcohol; the surface modified fullerene is obtained by modifying fullerene by using dodecyl mercaptan and azodiisobutyronitrile. When ester synthesized from isostearyl alcohol is used as an ester derivative of Guerbet alcohol, the lubricant still has good lubricating performance. Furthermore, the high-temperature-resistant and high-pressure-resistant oxidation performance is good.

The present invention provides a Si-Ga nanomaterial catalyst and its preparation method and application, which belongs to the field of catalyst technology, comprising the following steps: stirring after mixing a tetraethyl orthosilicate solution with a structure directing agent (DMF), subsequently adding a gallium nitrate solution and continuing to stir, then continuing to add a rare earth compound solution and an ethylene glycol solution and continuing to stir the reaction, calcining after freeze-drying, and obtaining the Si-Ga nanomaterial catalyst. The present invention also discloses the Si-Ga nanomaterial catalyst prepared by the above-mentioned preparation method and its application in the catalytic synthesis of tert-dodecyl mercaptan. The catalyst provided by the present invention can make the reaction react in a wider reaction temperature (60°C to 200°C) window and under low pressure, and the tert-dodecyl mercaptan yield is greater than 85%, and the stability is not less than 800h, which is suitable for industrial production.

The application discloses an environment-friendly copper-gallium-chalcogenide zinc sulfide core-shell quantum dot as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a gallium source, a copper source, oleylamine and 1-dodecyl mercaptan, heating, degassing in a nitrogen environment, adding a sulfur precursor solution, reacting, obtaining a quantum dot solution, heating the quantum dot solution, adding a zinc acetate precursor solution dropwise and stirring to react, continuously heating, adding a zinc stearate precursor solution dropwise and stirring to react, water quenching after the reaction, purifying, and obtaining a copper-gallium-chalcogenide zinc sulfide core-shell quantum dot. The copper-gallium-chalcogenide zinc sulfide core-shell quantum dot material prepared by the method of the application does not add toxic heavy metal materials, is harmless to human bodies and the environment, and has the advantage of high light condensation efficiency, and can effectively solve the problems of existing quantum dot materials.

The invention provides a high-adsorption and high-conductivity gold coating for a PI substrate and a preparation method of the high-adsorption and high-conductivity gold coating, and belongs to the technical field of electronic functional materials. The preparation method comprises the following steps: synthesizing tert-dodecylmercaptan gold, and mixing the tert-dodecylmercaptan gold with a first organic solvent to obtain an organic gold coating; and the pretreated PI substrate is coated with the organic gold coating and annealed, and the gold coating is obtained. According to the method, mercaptan molecules are effectively used as a bifunctional bridge to cooperatively create an organic-inorganic hybrid interface with high bonding strength and good stability, the inherent defect of poor adhesion of a pure gold coating is overcome, the sheet resistance of the prepared gold coating is lower than 0.3 omega / sq, the adhesion reaches the 5B level, the resistance is not obviously changed in an environmental adaptability test, the adhesion is still the 5B level, and the prepared gold coating has a good application prospect. And high conductivity, strong substrate adhesion and excellent environmental stability of the gold coating are realized.

The invention discloses an electrode material for a hydrogen production electrolytic cell and a preparation method thereof, and relates to the technical field of hydrogen production, and the preparation method comprises the following steps: uniformly mixing and stirring nickel salt, ferroferric oxide, ethylene glycol and lauryl mercaptan; adding ammonia water, uniformly mixing, carrying out hydrothermal reaction, washing and drying to obtain nickel / ferroferric oxide; the preparation method comprises the following steps: adding nickel / ferroferric oxide and a binder into a solvent, stirring for 4-6 hours, and carrying out spray drying to obtain modified nickel / ferroferric oxide; and carrying out heat treatment on the modified nickel / ferroferric oxide in an inert atmosphere to obtain the electrode material. The prepared electrode material has high activity, and the hydrogen production efficiency is effectively improved.

The invention discloses a preparation method of tert-dodecyl mercaptan. The tert-dodecyl mercaptan is prepared by adopting continuous reaction rectification and catalyzing tetra-polypropylene and hydrogen sulfide to react and rectify in a rectifying tower by using solid acid. The method can effectively utilize the reaction heat released in the synthesis of tert-dodecanethiol, solves the problem of temperature runaway caused by large heat release, can break the balance of the reaction, improves the conversion rate of tetra-polypropylene to 99% or above, directly obtains a qualified product without separation of the raw material tetra-polypropylene, greatly simplifies the process flow, and obviously reduces the production cost.

The invention belongs to the technical field of thin film material preparation, and particularly relates to a high-stability quantum dot adhesive film and a preparation method thereof. The content of the zinc dodecyl mercaptide in the quantum dot adhesive film is 0.5 to 2 weight percent. According to the light conversion adhesive film, the zinc dodecyl mercaptide is added into the light conversion adhesive film, so that the quantum dots are protected, and the stability of the quantum dots is improved. In the processing process, based on the dendritic structure of the zinc dodecyl mercaptide, the zinc dodecyl mercaptide can be coordinated with metal ions on the surfaces of the quantum dots, a compact and complex-structure'protective sleeve 'is formed on the surfaces of the quantum dots, water and oxygen molecules are prevented from being diffused into the quantum dots, the purpose of protecting the quantum dots is achieved, and therefore the stability of the quantum dots is improved, and the quantum dots are prepared. Therefore, the service life of the quantum dot adhesive film is prolonged.

The invention provides a method for improving the stability of a tert-dodecyl mercaptan catalyst and application of the tert-dodecyl mercaptan catalyst. The method comprises the following steps: step 1, dissolving a metal precursor and a functional additive in water or ethanol according to a certain molar ratio; 2, calculating the water absorption rate of the Y-type molecular sieve, placing the dried Y-type molecular sieve in the solution, and carrying out equivalent-volume impregnation, and 3, carrying out low-temperature drying on the impregnated Y-type molecular sieve obtained in the step 2, and then carrying out high-temperature roasting to obtain the modified Y-type molecular sieve. The catalyst prepared by the method provided by the invention is suitable for synthesis of tert-dodecyl mercaptan by addition of isododecene and hydrogen sulfide, has low requirements on olefin content of raw materials, and the obtained product has high yield and good stability and is suitable for industrial production.

The invention belongs to the technical field of solar cells, and particularly relates to a perovskite solar cell with N-dodecyl mercaptan-copper clusters cooperatively implanted into a perovskite layer and a hole transport layer, and the perovskite solar cell is characterized in that an N-dodecyl mercaptan-copper cluster colloidal solution is prepared by adopting a liquid-phase pulse laser irradiation technology; the passivated perovskite solar cell is prepared through the steps of preparing a perovskite substrate, taking n-dodecyl mercaptan-copper clusters as a co-doped additive, simultaneously implanting a perovskite layer and a hole transport layer, sequentially depositing an electron transport layer, spin-coating the perovskite layer and the hole transport layer, and finally, evaporating a metal electrode to obtain the passivated perovskite solar cell. The n-dodecyl mercaptan-copper cluster is implanted into the perovskite layer and the hole transport layer at the same time, a defect passivation and charge transfer channel is constructed, the energy levels of the perovskite layer and the hole transport layer are improved, the hole mobility is effectively improved, extraction and transport of hole carriers are promoted, and the high-efficiency passivated perovskite solar cell is obtained. The implantation mode is convenient, and the preparation process is simple.

The invention belongs to the technical field of lithium ion battery adhesives, and particularly relates to hyperbranched reticular polyacrylic resin special for a silicon-carbon negative electrode and a preparation method and application of the hyperbranched reticular polyacrylic resin. The special hyperbranched reticular polyacrylic resin for the silicon-carbon negative electrode comprises the following raw materials in parts by mass: 3-10 parts of waterborne acrylic resin, 4-10 parts of a monomer A, 2-6 parts of a monomer B, 2-6 parts of a monomer C, 60-80 parts of a solvent, 0.1-0.2 part of a chain extender, 1-8 parts of a cross-linking agent and 0.5-1 part of a silane coupling agent. The monomer A is an acrylate monomer; the monomer B is an acrylamide monomer; the monomer C is selected from at least one of allyl amine monomers and acrylonitrile monomers; the chain extender is selected from at least one of lauryl mercaptan and 2-mercaptoethanol. The polyacrylic resin disclosed by the invention has relatively high viscosity and peel strength, and the prepared lithium ion battery negative electrode material has relatively high specific discharge capacity and cycle performance.

This invention discloses a method for preparing an ultrathin zinc indium sulfide / zinc selenide heterojunction photocatalyst: Step 1, a certain amount of ZnCl2, InCl3·4H2O and oleylamine are mixed and subjected to a first deoxygenation treatment. A mixed solution of 1-dodecanethiol and tert-dodecylmercaptan is rapidly injected under nitrogen conditions and reacted at a certain temperature for a certain time to obtain ultrathin zinc indium sulfide nanosheets. After centrifugation and washing, the nanosheets are redissolved in a certain amount of n-hexane. Step 2, zincacetate, oleic acid and 1-octadecene are mixed and subjected to a second deoxygenation treatment. The mixture is then heated to a certain temperature under nitrogen conditions, reacted for a certain time, and cooled. A certain amount of the solution obtained in step S1 is rapidly injected and subjected to a third deoxygenation treatment. The mixture is then heated under nitrogen conditions, and a certain amount of a mixed solution of Se and TOP is slowly injected at a certain rate. The mixture is then kept at a certain temperature and reacted for a certain time. After the injection process is completed, the reaction is allowed to continue. Finally, the solution is cooled to room temperature and centrifuged to obtain ZIS / ZnSeHNSs.

The invention discloses a catalyst for synthesizing tert-dodecyl mercaptan as well as a preparation method and application of the catalyst, and relates to the technical field of tert-dodecyl mercaptan. According to the technical scheme, the preparation method comprises the following steps: S1, adding an aromatic hydrocarbon additive into a reaction kettle, adding anhydrous aluminum chloride and ferric chloride in batches while stirring, and uniformly mixing; s2, the reaction kettle is sealed with nitrogen, anisole or anisole homologues are dropwise added under the condition of temperature-controlled stirring for 0.5-1 h, after dropwise adding is completed, the temperature-controlled stirring reaction continues under the condition of nitrogen sealing for 0.1-0.5 h, the temperature is recovered to the room temperature, and the catalyst for tert-dodecyl mercaptan synthesis is obtained. According to the present invention, the catalyst can be prepared under the mild condition, the selectivity is more than 95% when the catalyst is used for synthesizing the tert-dodecyl mercaptan, and the synthesized tert-dodecyl mercaptan product is suitable for the high molecular polymerization process of ABS, SBR, butyronitrile latex and other products.

The invention relates to the technical field of drag reducers, in particular to a salt-resistant drag reducer for oil field fracturing, which is prepared from the following raw materials in parts by weight: 50 to 70 parts of composite polyglutamic acid, 3 to 10 parts of polyethyleneimine, 0.5 to 2 parts of azodiisobutyronitrile, 1 to 5 parts of hydroxyethyl cellulose, 0.1 to 0.5 part of hydroquinone monomethyl ether and 0.5 to 2 parts of lauryl mercaptan. 1-benzyl-3-methyl triazolium chloride salt is added, triazolium cations in the molecular structure of the 1-benzyl-3-methyl triazolium chloride salt have stable chemical properties, and electrostatic repulsion of a polyglutamic acid molecular chain can be enhanced through an ion shielding effect, so that the salt resistance is improved; due to the action, the drag reducer can maintain the extensibility of molecular chains in a high-salt environment, intermolecular entanglement and aggregation are reduced, the conformation of the molecular chains is optimized, and the drag reduction effect is improved; meanwhile, methacrylic acid is added, negative charges can be ionized from carboxyl in molecules of methacrylic acid, the methacrylic acid and other components in the system have a synergistic effect, salt ion interference is effectively resisted, and the salt resistance is further enhanced.