424 results about "Diimine" patented technology

The invention relates to the field of molecular photoelectric devices, and provides a single photon source based on an up-conversion photoelectric device and a preparation method thereof, and the preparation method comprises the steps: preparing a dielectric layer; preparing a graphene array electrode on the dielectric layer; constructing a graphene nano gap point electrode pair; placing the graphene nano gap point electrode pair in a two-neck flask, adding 1-(3-dimethylaminopropyl)-3-2-ethylcarbodiimide hydrochloride and an up-conversion luminescent molecule A part into the two-neck flask, adding anhydrous pyridine into the two-neck flask in a nitrogen environment, and stirring to obtain a graphene nano gap point electrode pair; and putting the device connected with an up-conversion luminescent molecule part A at two ends and an up-conversion luminescent molecule part B containing lanthanide metal into a tetrahydrofuran solution for molecular system chelation to obtain the single-molecule up-conversion photoelectric device containing the chiral group. A liquid metal Ga2O3 protective layer is plated on a single-molecule up-conversion photoelectric device, so that a single photon source is obtained, and the stability and the anti-interference capability of the single photon source are enhanced.

The invention belongs to the technical field of polyurethane pouring sealants, and particularly relates to a hydrolysis-resistant heat-conducting polyurethane pouring sealant and a preparation method thereof. The hydrolysis-resistant heat-conducting polyurethane pouring sealant is prepared from a component A and a component B according to the mass ratio of 100: (18.5-20.5), and the component A comprises the following raw materials: amine ether polyol, modified castor oil, a flame retardant, a heat-conducting filler, a silane coupling agent and a catalyst; the component B is prepared from the following raw materials: polymerized MDI (Diphenyl Diisocyanate), MDI-50 and carbodiimide modified MDI; the amine ether polyol is prepared by carrying out a reaction on 3, 3 '-dimethyl-4, 4'-diaminodiphenylmethane and epoxypropane. The hydrolysis-resistant heat-conducting polyurethane pouring sealant disclosed by the invention not only has good technological operation performance and heat-conducting performance, but also has excellent hydrolysis resistance, and still has good mechanical property and electrical insulation property after being aged; the invention also provides a scientific, reasonable, simple and feasible preparation method.

The invention discloses self-adhesion-crosslinking double modified bamboo powder, a preparation method and application, and relates to the technical field of composites.The preparation method of the modified bamboo powder comprises the following steps that S1, bamboo powder, 2, 5-dihydroxyterephthalic acid, 4-aminobenzoyl hydrazine, N, N '-diisopropylcarbodiimide and tris (hydroxymethyl) aminomethane are mixed for a reaction; and S2, trimesic acid is added into the solution obtained after the reaction in the S1 for a reaction, filtering, washing and drying are conducted, and the self-adhesion-crosslinking double modified bamboo powder is obtained. The prepared modified bamboo powder is green and environmentally friendly, through a self-adhesion mechanism, a cross-linking mechanism, a branched-chain phenyl heterogeneous nucleation mechanism and the like, the interfacial compatibility of PBAT and the bamboo powder and the crystallinity of PBAT are improved, and therefore the mechanical property of PBAT / bamboo powder is enhanced.

The invention discloses a preparation method of a cell inflammatory factor adsorbent, which comprises the following steps: mixing styrene, divinyl benzene and hydroxyethyl acrylate, and adding a pore-foaming agent and mesoporous SiO2 nano powder to prepare a porous microsphere carrier; the preparation method comprises the following steps: mixing chitosan and poly (N-isopropylacrylamide) in an acetic acid solution to obtain a temperature-sensitive chitosan hydrogel precursor solution; the preparation method comprises the following steps: activating the surface of a porous microsphere carrier by using 1-ethyl-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide, mixing the activated porous microsphere carrier and a temperature-sensitive chitosan hydrogel precursor solution to obtain a water phase, and assembling, washing and drying in an oil phase to obtain the cell inflammatory factor adsorbent. Through the design of the core-shell structure and the addition of the mesoporous SiO2 nano powder, the temperature response characteristic and the recyclable characteristic are given to the cell inflammatory factor adsorbent, the adsorption capacity of cell factors is also improved, and a new solution is provided for physical adsorption of the cell inflammatory factors.

The invention discloses branched polyethylene and a preparation method thereof. The preparation method of the branched polyethylene comprises the following steps: taking an alpha-diimine nickel catalyst as a main catalyst, wherein the alpha-diimine nickel catalyst is shown in a formula (1); the method comprises the following steps of: polymerizing ethylene by using at least one selected from aluminoxane, modified aluminoxane, alkyl aluminum, alkyl aluminum hydrolysate, halogenated alkyl aluminum, aryl boron, alkyl boron and borate as a cocatalyst and using a polymerization solvent containing a halogenated organic solvent under the conditions that the polymerization reaction temperature is 60-85 DEG C and the polymerization pressure is 1.2-3.0 MPa to obtain the branched polyethylene. Compared with the traditional EPDM, the branched polyethylene prepared by the method provided by the invention has the advantage that the low-temperature impact performance of a polypropylene base material is improved very well.

The invention discloses an asymmetric diimine zinc complex and a preparation method and application thereof.The preparation method of the asymmetric diimine zinc complex comprises the steps that acenaphthequinone, a first dehydrating agent, a first catalyst, first substituted aniline and a solvent are subjected to a first reaction, and a monoimine ketone compound is obtained; and performing a second reaction on the monoimine ketone compound, a zinc salt, a second dehydrating agent, second substituted aniline and a second catalyst to obtain the asymmetric diimine zinc compound. According to the preparation method of the asymmetric diimine zinc compound, zinc salt is added in the reaction process, generated unstable large-steric-hindrance groups are used for replacing diimine for stable complexation, a corresponding zinc complex is generated and can be separated from a reaction system in time in the reaction process, the reaction equilibrium can be effectively promoted to be carried out to a positive reaction, and the yield of the asymmetric diimine zinc compound is improved. And the large-steric-hindrance group substituted diimine zinc complex can be synthesized with high selectivity and high yield.

An adhesive composition (100) comprises: a polyester resin (A) that includes an ester bond which bonds repeating units together and one or more functional groups selected from the group consisting of carboxy groups and carboxylic acid anhydride structures; an epoxy compound (B) in the amount of 1-50 parts by mass with respect to 100 parts by mass of the polyester resin (A); and a cyclic carbodiimide (C) in the amount of 0.1-20 parts by mass with respect to 100 parts by mass of the polyester resin (A).

The invention provides a triazine covalent organic framework film as well as a preparation method and application thereof. A preparation method of a triazine covalent organic framework membrane comprises the following steps: (1) soaking and washing a polyacrylonitrile ultrafiltration membrane in a strong alkali solution to obtain a pretreated ultrafiltration membrane; (2) soaking the pretreated ultrafiltration membrane in a 2-morpholine ethanesulfonic acid buffer solution containing N-hydroxysuccinimide and 1-ethyl-(3-dimethylaminopropyl) carbodiimide, and washing with water to obtain an activated ultrafiltration membrane; (3) soaking the activated ultrafiltration membrane in a first organic phase solution of a polyamine monomer and 1, 4-dioxane, and washing with water; soaking in a second organic phase solution of a polyaldehyde monomer and 1, 4-dioxane to obtain a modified ultrafiltration membrane; and (4) immersing the modified ultrafiltration membrane into a mixed solution composed of a polyamine monomer, a polyaldehyde monomer, acetic acid and 1, 4-dioxane, and cleaning to obtain the triazine covalent organic framework membrane. The triazine covalent organic framework membrane provided by the invention has good separation performance and catalytic oxidation performance.

The present invention provides a continuous solution preparation method for vinyl polyolefin elastomer, belonging to the technical field of polyolefins. The continuous solution preparation method comprises: using ethylene as a single olefin raw material, under the action of a nickel diimide catalyst and a co-catalyst, performing a polymerization reaction in a solvent of at least one reactor to obtain a vinyl polyolefin elastomer glue solution; directly passing the vinyl polyolefin elastomer glue solution into a deashing unit for at least one of washing deashing and adsorption deashing to remove the nickel diimide catalyst and the co-catalyst to obtain a deashed vinyl polyolefin elastomer glue solution; continuously passing the deashed vinyl polyolefin elastomer glue solution into a devolatilization unit for static devolatilization to remove volatiles to obtain a devolatilized vinyl polyolefin elastomer glue solution; extruding and granulating the devolatilized vinyl polyolefin elastomer glue solution to obtain vinyl polyolefin elastomer particles.

The invention discloses bio-based ultralow-water-permeability two-component polyurethane which is characterized in that a component A comprises 20-40 parts of modified castor oil, 5-15 parts of diisooctyl adipate, 1-5 parts of a coupling agent, 60-70 parts of aluminum hydroxide, 5-10 parts of a water removal agent and 1-3 parts of a coloring agent; the component A is polymethylene polyphenyl isocyanate, the component B is composite isocyanate formed by combining two of polymethylene polyphenyl isocyanate, diphenylmethane diisocyanate, carbodiimide modified diphenylmethane diisocyanate and isophorone diisocyanate, and the component B is composite isocyanate formed by combining two of polymethylene polyphenyl isocyanate, diphenylmethane diisocyanate, carbodiimide modified diphenylmethane diisocyanate and isophorone diisocyanate. The invention further discloses a preparation method. The polyurethane pouring sealant with ultralow water permeability is obtained by optimizing a polyurethane formula and compounding a curing agent component.

The invention belongs to the technical field of organic porous materials, and relates to an acenaphthequinone diimine palladium functionalized super-crosslinked microporous polymer as well as a preparation method and application thereof. The preparation method specifically comprises the following steps: carrying out Friedel-Crafts alkylation reaction on (1E, 2E)-N1, N2-bis [2, 4, 6-tri-(benzhydryl phenyl)] acenaphthylene-1, 2-diimine and dimethyl formal, 1, 3, 5-triphenylbenzene or tetraphenylmethane, so as to obtain an organic porous polymer; and carrying out coordination on the organic porous polymer and PdCl2 to obtain the acenaphthequinone diimine palladium functionalized super-crosslinked microporous polymer with catalytic activity. The super-crosslinked microporous polymer has the advantages of high stability, large specific surface area and high palladium loading capacity, and can catalyze the direct C-H bond arylation reaction of brominated aromatic hydrocarbon and heteroaromatic hydrocarbon to synthesize a linked heteroaryl compound; the preparation method of the organic porous polymer catalytic material is simple and suitable for industrial production.

The invention relates to an anti-blue light optical protective film and a preparation method thereof, belonging to the technical field of anti-blue light optical elements. The protective film comprises 0.2-1.4 parts of a blue light absorber, 9-27 parts of ultrapure water and 1-3 parts of polyvinyl alcohol, and the blue light absorber consists of 0.07-0.09 parts of graphene quantum dots, 110-130 parts of anhydrous ethanol, 0.05-0.07 parts of aminonitrobenzene compounds, 1-2 parts of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and 0.3-0.6 parts of N-hydroxysuccinimide. The preparation method comprises the following steps: mixing polyvinyl alcohol and ultrapure water, swelling and dissolving the mixture in sequence to obtain a polyvinyl alcohol solution; then mixing the polyvinyl alcohol solution and the blue light absorber to obtain a mixed material; and finally coating the mixed material on a glass substrate and then drying the mixture to obtain the anti-blue light optical protective film. The anti-blue light optical protective film prepared by using the blue light absorber will not change the high light transmittance of the optical film itself in the visible light region, and can also absorb harmful blue light.

The invention provides a catalyst composed of a diimine ligand and transition metal and a preparation method and application thereof, and relates to the technical field of catalyst preparation, tridentate diimine ligand is synthesized and constructed through short three steps, and the diimine ligand and the transition metal form a complex to serve as a novel catalyst.The defects in the prior art are overcome, and the catalyst is suitable for industrial production. The catalyst composed of the diimine ligand and the transition metal has the structural characteristics of a diimine catalyst and a salicylaldehyde imine catalyst, not only has certain tolerance to water and oxygen, but also can bear poison of a polar monomer to the catalyst, and promotes copolymerization of ethylene and the polar monomer.

A lithium supplement and a preparation method therefor, a positive electrode sheet, and a battery. The lithium supplement comprises: a core, wherein the core comprises LiaMbOc, wherein a is 2-6, b is 0-4, c is 1-6, and M comprises at least one of Mg, Al, Si, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ru, and Sn; and a coating layer, wherein the coating layer at least covers part of the surface of the core, and the coating layer contains at least one of a silazane compound, a siloxane compound, a sulfonic acid silane compound, and a carbodiimide compound.

The invention provides a polyglutamic acid granular fertilizer and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving lignin in an alkaline solution, and heating until the lignin is dissolved; adding epsilon-polylysine fermentation liquor, mixing, heating, adding a formaldehyde solution, and carrying out grafting reaction to obtain epsilon-polylysine grafted lignin; s2, mixing the epsilon-polylysine grafted lignin solution and the gamma-polyglutamic acid solution, adding N-hydroxysuccinimide, standing at a low temperature, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and mixing; carrying out gradient temperature reaction to obtain lignin grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel; and S3, homogenizing the lignin-grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel, carrying out normal-temperature high-pressure airflow crushing, and spraying the crushed hydrogel to the surfaces of particles obtained by granulating a basic material through high-pressure electrostatic spraying, so as to obtain the polyglutamic acid granular fertilizer. The obtained polyglutamic acid granular fertilizer has relatively strong water-retaining and slow-release (releasing water, urea and the like) effects.

The invention discloses a deuterated lamiterone medicine as well as a preparation method and application thereof, and relates to the technical field of lamiterone, the preparation method comprises the following steps: firstly weighing deuterated propionic acid, and then adding dichloromethane, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 1-hydroxybenzotriazole to obtain white turbid liquid; dropwise adding the mixed solution into the white turbid liquid, stirring and reacting overnight, adding water for quenching, extracting twice by using dichloromethane, washing by using a saturated saline solution, drying by using anhydrous sodium sulfate, and concentrating to obtain a crude product; performing column chromatography separation on the crude product, concentrating and drying to obtain a deuterated lamiterone medicine; according to the deuterated lamiterone medicine as well as the preparation method and the application thereof, hydrogen atoms at key positions in lamiterone molecules are replaced with deuterium atoms, so that the metabolic rate of deuterated lamiterone is reduced, the half-life period of deuterated lamiterone is prolonged, and the sleep time of a patient is prolonged.

The invention discloses a method for synthesizing a key intermediate of semaglutide, and belongs to the field of drug synthesis. The specific synthesis method includes: using Fmoc-Gly-OH, an activation reagent, a reaction solvent, a catalyst and H-Arg(Pbf)-OH as reaction raw materials, performing activation and condensation reactions, washing and recrystallization, and separating to obtain a key intermediate of semaglutide; using 2-phenoxy-N-(3-pyridyl)acetamide and 1-phenyl-3-(cyclohexylmethylene)carbodiimide as activators and catalysts, a key intermediate of semaglutide is obtained more stably and effectively, and the synthesis of the key intermediate of semaglutide by the present invention has high purity and yield; at the same time, the present invention has the advantages of simple preparation process, stable product quality, high purity and yield, etc.

The invention discloses antibacterial and antioxidant dynamic nanogel as well as a preparation method and application thereof. The preparation method comprises the following steps: chemically modifying L-arginine with methacrylic anhydride to obtain an antibacterial monomer M-Arg; dissolving the M-Arg powder, N-isopropylacrylamide, N, N '-methylene bisacrylamide, hexadecyl trimethyl ammonium bromide and 2, 2'-azobis (isobutylamidine) dihydrochloride in deionized water, carrying out precipitation polymerization, carrying out dialysis, and adjusting the concentration and the pH value of the solution to obtain a nanogel antibacterial agent; the preparation method comprises the following steps: grafting dopamine into a nanogel antibacterial agent through activation of 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide, dialyzing, and adjusting the concentration and pH value of a solution to obtain the antibacterial and antioxidant dynamic nanogel. Good antibacterial and antioxidant effects can be achieved at different temperatures and in different acidic environments, and the antibacterial wound dressing can be used for treating infected wounds.

The invention discloses a graft copolymerization modified high-water-retention formaldehyde-free adhesive as well as a preparation method and application thereof, and belongs to the technical field of adhesive preparation. The adhesive is prepared from the following components: deionized water, vegetable protein meal powder, cationic polyamide polyamine epichlorohydrin resin and an anionic moisturizing factor, wherein the anionic moisturizing factor is prepared from the following components: deionized water, an initiator, acrylamide, itaconic acid, chitosan, hydrochloric acid, N, N '-methylenebisacrylamide, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxy succinimide. According to the invention, acrylamide, itaconic acid and chitosan are subjected to a graft copolymerization reaction, a moisturizing factor with negative charges is formed in situ in the process, and the moisturizing factor is compounded with polyamide polyamine resin with positive charges for use, so that not only can the water retention capacity of the plant protein adhesive be remarkably improved, but also the mechanical strength characteristic of the plant protein adhesive can be synchronously enhanced.

The invention relates to the technical field of polymer suspension preparation, and relates to a polymer suspension for coal rock gas. Comprising the following components in parts by weight: 0.05 to 0.07 part by weight of a viscosity regulator, 0.1 to 0.5 part by weight of polyacrylamide, 0.2 to 0.8 part by weight of hydroxypropyl guar gum, 0.01 to 0.05 part by weight of borax, 0.03 to 0.06 part by weight of a polyoxyethylene octyl phenyl ether surfactant, 0.02 to 0.05 part by weight of a sodium hydroxide pH regulator, 0.01 to 0.03 part by weight of a citric acid scale inhibitor, 0.02 to 0.04 part by weight of a sodium benzoate preservative and the balance of water. 0.01-0.03 part by weight of a chlorogenic acid salt-resistant agent and 10-20 parts by weight of a quartz sand proppant; wherein the viscosity modifier is prepared by reacting carboxymethyl cellulose with amino-polyethylene glycol-lipoic acid according to the ratio of 1: (1.2-1.5) and forming an amido bond under the condition of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride and N-hydroxysuccinimide, and the viscosity modifier is adopted, so that the viscosity modifier can be used for modifying the viscosity of the product. The viscosity, the high-temperature stability and the salt resistance of the suspension are enhanced, and the limitation of the traditional suspension is effectively solved.

A preparation method of the acene 1, 8-naphthalimide derivative comprises the steps that acene 1, 8-naphthalimide is added into a dichloromethane solvent, p-bromobenzoic acid, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and 4-dimethylaminopyridine are sequentially added, stirring is carried out, and the acene 1, 8-naphthalimide derivative is obtained. Fully stirring and reacting the reaction mixture at 40-50 DEG C for 10-12 hours to obtain a reaction solution 2; and carrying out ice water quenching, suction filtration, extraction, drying and rotary evaporation on the reaction liquid 2 to obtain a solid product, and carrying out column chromatography purification to obtain the compound acene 1, 8-naphthalimide derivative. The preparation method of the phosphorescent material is simple and convenient, compared with a noble metal phosphorescent system, the cost is low, the synthesis method of the guest phosphorescent dye is simple, the yield is high, the phosphorescent effect is obvious, and the phosphorescent phenomenon is stable, so that the application potential in the fields of phosphorescent anti-counterfeiting and the like is huge.

The invention provides a 1, 4-diaza-butanetriene compound as well as a synthesis method and application thereof, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: carrying out a first reaction on a compound 1 and a compound 2 in a solvent A, removing the solvent A after the reaction is finished, extracting with benzene or toluene, filtering, mixing with 12-crown ether-4, and stirring to obtain a compound 3; the synthesis method of the compound 3 provided by the invention is high in yield, simple to operate, mild in reaction, simple in required reaction condition control and high in speed. The obtained compound 3 has excellent stability and can be used for key intermediates in various organic reactions, such as preparation of alpha-diimine ligands.

The application discloses a crystalline hyperbranched multi-arm copolymer, a self-supporting graphene film and a preparation and application thereof. The crystalline hyperbranched multi-arm copolymer is prepared by the following method: a hyperbranched macromolecular initiator is obtained by using an alpha-diimine palladium catalyst to catalyze ethylene and a bromine-containing functional monomer in a one-step "chain removal" copolymerization in a water-free grade solvent; and then the hyperbranched macromolecular initiator is used to initiate atom transfer radical polymerization of an acrylate functional monomer to obtain the crystalline hyperbranched multi-arm copolymer. The crystalline hyperbranched multi-arm copolymer, graphite powder and a solvent are mixed in proportion, graphene initial dispersion liquid is obtained through ultrasonic and centrifugal separation, and then the self-supporting graphene film is obtained through filtration, elution and drying in sequence. The application provides an application of the self-supporting graphene film as an electrothermal film, and the self-supporting graphene film has excellent electrothermal performance and mechanical strength.

The present invention belongs to the technical field of semiconductor materials, and discloses a polymer with alternating arrangement of perylene diimide and naphthalene diimide, and its preparation method and application. The preparation method of the polymer includes the following steps: mixing naphthalic anhydride, alkanolamine and an organic solvent, and reacting to obtain naphthalene diimide-diol; mixing naphthalene diimide-diol, bromoacetic acid, 4-dimethylaminopyridine, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and an organic solvent, and reacting to obtain naphthalene diimide-dibromide; mixing naphthalene diimide-dibromide, perylene diimide-diamine and an organic solvent, and reacting to obtain the polymer. The present invention takes naphthalene diimide and perylene diimide as the core structures, and through design and synthesis, obtains a polymer with good water and alcohol solubility. This polymer can integrate the physical and chemical properties of the above two structural units, providing a guarantee for its application as an electron transport layer material in solar cells.

The invention discloses an immobilized enzyme with a Pickering emulsion stabilizing effect and a preparation method and application thereof. The preparation method comprises the following steps: adding shellac into an alkaline solution, stirring until the shellac is dissolved, preparing an aqueous solution, adjusting the pH value of the solution to 6-8, fully stirring to uniformly disperse shellac particles, and drying to obtain shellac nano-particle powder; the preparation method comprises the following steps: dispersing shellac nano-particle powder in water or a buffer solution, adding EDC (1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride) and NHS (N-hydroxysuccinimide), then adding lipase, and carrying out a coupling reaction to obtain the shellac nano-particle immobilized enzyme. The natural nanoparticle immobilized enzyme prepared by the invention not only can stabilize Pickering emulsion, and the emulsion can realize reversible emulsification-demulsification circulation under the stimulation of acid-base or gas, but also can be used for constructing a phytosterol ester efficient synthesis reaction system.

The invention belongs to the technical field of degradable and recyclable epoxy resin, and discloses degradable epoxy resin based on diimine bond vanillin as well as a preparation method and application of the degradable epoxy resin. The epoxy resin chain extender containing the biimine bond bio-based is prepared through a Schiff base reaction, the epoxy resin chain extender and epoxy resin are subjected to ring opening, finally, the epoxy resin chain extender and the curing agent containing amido are subjected to high-temperature curing, and the degradable and recyclable thermosetting epoxy resin and the degradable carbon fiber composite material which have excellent mechanical properties are prepared. The problem of recycling the thermosetting epoxy resin and the composite material is solved, sustainable utilization of resources is realized, and environmental pollution is reduced.

The invention relates to the technical field of chemical oil-displacing agents for tertiary oil recovery, and particularly discloses a magnetic nano oil-displacing agent and a preparation method thereof. The preparation method comprises the following steps: S1, taking purple phosphorus nanosheets, ferrous sulfate, ferric chloride and ammonia water as raw materials to react to obtain magnetic purple phosphorus nanosheets; s2, reacting the polymer A with ethylenediamine to obtain an aminated polymer A; s3, adding the aminated polymer A or polymer B and 4-dimethylaminopyridine 1, 3-dicyclohexylcarbodiimide into an aqueous solution of the magnetic purple phosphorus nanosheet, so as to obtain a modified magnetic purple phosphorus nanosheet; s4, performing ammonification reaction on the surfactant to obtain an aminated surfactant; and S5, adding an aminated surfactant into the modified magnetic purple phosphorus nanosheet aqueous solution, then adding N-hydroxysuccinimide and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and carrying out a reaction to obtain the magnetic nano oil displacement agent. The oil-displacing agent disclosed by the invention can realize magnetic recovery while realizing a viscosity reduction effect so as to improve the oil recovery rate, and waste of raw materials is avoided.

This invention relates to a method for testing the resistance to phenolic yellowing of carbodiimide anti-hydrolysis agent powder and its application. The testing method includes: (1) grinding the sample to be tested and spreading it evenly in a petri dish; (2) placing 2,6-di-tert-butyl-p-cresol in a petri dish of the same size as in step (1); (3) placing the test reagent in a container; (4) placing the petri dish from step (1), the petri dish from step (2), and the container from step (3) into a sealed container for aging; (5) immediately using a colorimeter to detect the yellowing index of the sample after aging in step (4). The method of this invention can accurately detect powdered or crystalline carbodiimide anti-hydrolysis agents, solving the problem that it is currently impossible to accurately detect the phenolic yellowing resistance of powdered samples.

The invention provides an alpha-diimine ligand compound, an alpha-diimine nickel catalyst and a preparation method and application of the alpha-diimine ligand compound and the alpha-diimine nickel catalyst, and belongs to the technical field of organic synthesis. Wherein R1 is selected from hydrogen, methoxyl or tertiary butyl; r2 is selected from methyl, ethyl or isopropyl; and R3 is selected from hydrogen or methyl. The alpha-diimine nickel catalyst prepared by adopting the alpha-diimine ligand compound can catalyze olefin to carry out homopolymerization reaction or copolymerization reaction, so that not only is excellent catalytic performance shown, but also a polyolefin material obtained by catalyzing olefin monomer homopolymerization reaction has excellent elastic recovery performance; and the catalyst has certain application potential in olefin polymerization industry.

The present invention provides a diimine ligand having a general structure shown in Formula L, wherein R1 to R8 are independently selected from H, C1-C6 alkyl, C1-C6 alkoxy, C6-C 12 Aryl or halogen. The diimine ligand is prepared by acid catalysis using a 1,2-diketone compound having an isatin skeleton and a bulky hindered aromatic amine having an aniline skeleton. The present invention also provides a late transition metal polyethylene wax catalyst using the diimine ligand coordinated with a late transition metal salt. The catalyst has high catalytic activity over a wide temperature range and excellent high-temperature stability. The catalyst is used in the preparation of polyethylene wax, and the product has characteristics such as a narrow molecular weight distribution, low branching, and good chemical and physical properties.