3427 results about "Condensation reaction" patented technology

The invention discloses preparation of an ionic porous nitrogen-rich molecular cage and application of the ionic porous nitrogen-rich molecular cage in purification of iodine-containing nuclear medical waste, and the preparation method comprises the following steps: taking an ammonia or amine reagent as a bridge, taking an aldehyde or ketone reagent as a reaction monomer, adopting a Schiff base reaction principle, and utilizing a polydentate coordination mode to carry out imine condensation reaction on substances through a one-pot method to obtain the ionic porous nitrogen-rich molecular cage. Generating a porous nitrogen-rich molecular cage; then adding a reducing agent to further reduce the porous nitrogen-rich molecular cage, then combining with alkyl halide and an organic solvent, stirring, and carrying out rotary evaporation to obtain the ionic porous nitrogen-rich molecular cage. The method has the beneficial effects that a porous organic cage material with an ionic nitrogen-rich ligand is selected as an adsorbent, so that the physical and chemical properties are stable; the preparation method is simple in synthesis and high in yield, and the nitrogen-rich ligand is stable in structure, can adsorb iodine in a gas phase and iodine in a water phase, and can be recycled; the ion interference resistance is high, and the method adapts to iodine adsorption under the water phase condition that the pH is 3-11; the method can be applied to treatment of iodine in nuclear medical wastewater.

The invention discloses a high-viscosity activated rubber powder grafted functionalized block copolymer composite modifier and preparation thereof, composite modified asphalt and preparation and application thereof, and belongs to the technical field of modified asphalt. The composite modifier disclosed by the invention is formed by grafting catechol / polyamine modified aminated rubber powder and an epoxidized block copolymer. A catechol / polyamine group and an amino group are subjected to a condensation reaction to jointly modify the surface of the rubber powder, so that the surface of the rubber powder has rich functional groups and active sites, the rubber powder and an epoxidized block copolymer are subjected to a chemical crosslinking reaction in the later period, and the effect of enhancing the full performance of asphalt by the composite modifier is achieved; the problems that the composite modifier and the modified asphalt are prone to agglomeration, poor in compatibility and the like are solved. A self-healing mixture prepared from the composite modified asphalt and a self-healing material together has synergistic effects of the composite modified asphalt and the self-healing material, so that the pavement performance and the use quality are effectively improved, the service life of a road is prolonged, the energy loss is reduced, and the composite modified asphalt has application value in the field of roads.

The invention belongs to the field of pesticides, and relates to a 2-cyano-3-disubstituted phenyl acrylate compound as well as a preparation method and application thereof in pesticides. Carrying out alcoholysis reaction on the benzonitrile compound a and a hydrogen chloride absolute ethyl alcohol solution to obtain an intermediate b; carrying out condensation reaction on the intermediate b and ethyl cyanoacetate under the action of alkali to obtain an intermediate c; the intermediate c and a substituted compound are subjected to a substitution reaction under the action of alkali and a catalyst, and the 2-cyano-3-disubstituted phenyl acrylate compound I is obtained. The 2-cyano-3-disubstituted phenylacrylate compound provided by the invention has good bactericidal activity, and has relatively high bactericidal activity on pathogenic bacteria of chlorosclerotium, fusarium, acrocyst, colletotrichum, cercospora, verticillium and black beancurd skin; the compound can be used for preparing bactericides in the fields of agriculture, horticulture, industry and the like, and has the advantages of broad spectrum, high efficiency, low toxicity and environmental friendliness.

A method of preparing an alkyl phosphate compound based on a micro-reaction system. The micro-reaction system includes a feed pump, a first micro-mixer, a second micro-mixer, a first micro-channel reactor, a second micro-channel reactor and a back-pressure device, where the first micro-mixer, the second micro-mixer, the first micro-channel reactor, the second micro-channel reactor and the back-pressure device are sequentially connected. The method includes the following steps. An alkylamine compound and an acid-binding agent are simultaneously fed to a first micro-mixer for mixing and then to the first micro-channel reactor for pre-reaction to obtain a pre-reaction solution. The pre-reaction solution and a phosphate or phosphite are simultaneously fed to the second micro-mixer for mixing to obtain a first reaction mixture. The first reaction mixture is fed to the second micro-channel reactor to carry out a condensation reaction under a back pressure condition and is concentrated to obtain the final product.

The invention discloses a porous carbon material as well as a preparation method and application thereof, and the porous carbon material is prepared by the following steps: by taking a silicon dioxide mesoporous hollow sphere as a hard template through a hard template method, carrying out condensation reaction on phenol and formaldehyde in the hollow part of the silicon dioxide mesoporous hollow sphere to form phenolic resin; and curing, carrying out carbon activation treatment and etching to obtain the spherical phenolic resin porous carbon material. The porous carbon material prepared by the preparation method disclosed by the invention has a relatively high specific surface area and a relatively uniform pore structure, and the cycle performance of a secondary battery can be improved when the porous carbon material disclosed by the invention is used for preparing a negative pole piece and assembling the negative pole piece into the secondary battery.

The invention discloses a preparation method of a GLP-1R agonist Orforglipron, which comprises the following reaction steps: carrying out four-step reaction on an oxopiperidine compound (1) and (4-fluoro-3, 5-dimethylphenyl) hydrazine (2) to obtain a compound 8, and carrying out seven-step reaction on 5-bromo-indolecarboxylic acid (9) to obtain a compound 17. Then, the compound 8 and a compound 17 are subjected to an acid amine condensation reaction, and Orforglipron (LY3502970) is obtained. The preparation method is relatively low in cost, easy to operate, relatively short in synthetic route and suitable for industrial production and application, and the total yield can reach 32%.

The invention discloses a modified organic silicon resin, a high-temperature-resistant coating and a preparation method thereof, the modified organic silicon resin is prepared by hydrolyzing at least two different siloxane monomers and then carrying out condensation reaction on the hydrolyzed siloxane monomers and at least one boric acid monomer, and the main chain of the organic silicon resin is of a heteroatom doped structure formed by a Si-O bond, a B-O bond and a B-O-Si bond; at 200-250 DEG C, the modified organic-inorganic high-temperature-resistant composite material is subjected to a self-crosslinking reaction. The high-temperature-resistant coating overcomes the defect that the high-temperature-resistant coating in the prior art cannot meet the high-temperature test, and avoids the defects that organic and inorganic high-temperature-resistant coatings crack, the impact resistance and hardness are not matched, the water resistance is poor, and the wear resistance is poor.

The invention discloses a glue solution for a copper-clad plate and a preparation method of the glue solution, and relates to the technical field of copper-clad plates. According to the prepared glue solution for the copper-clad plate, the composite epoxy resin, the curing agent, the accelerant, the solvent, the flexibilizer and the inorganic filler, the composite epoxy resin comprises bisphenol A epoxy resin, epoxy phenyl polysiloxane, itaconic acid polyaryletherketone and hydroxyl-terminated fluorine-containing vinyl polysiloxane, so that the interface bonding force with the copper plate is enhanced; the dielectric constant and the dielectric loss are effectively reduced, the peel strength and the toughness of the material are also remarkably improved, and the toughening agent is modified polyether sulfone microspheres; the modified polyethersulfone microspheres are prepared by coating polyethersulfone microspheres with hexamethylenediamine tetrapropionamide diamine, the hexamethylenediamine tetrapropionamide diamine is prepared by carrying out acylation condensation reaction on hexamethylenediamine tetramethyl propionate and ethylenediamine, and the polyethersulfone microspheres are prepared by carrying out electrostatic spinning on a spinning solution of polyethersulfone and vinylpyridine, so that the peel strength of the glue solution is remarkably improved.

The present invention discloses a rubber sealing strip and a preparation method thereof, and relates to the technical field of sealing strip production, the rubber sealing strip comprises the following raw materials: base rubber, modified montmorillonite, modified carbon black, a plasticizer, a vulcanizing agent, an anti-aging agent and other assistants, the modified montmorillonite is subjected to oleic acid modification, and tetraethoxysilane is subjected to hydrolysis and condensation reaction to obtain the rubber sealing strip. A silicon dioxide coating layer can be formed on the surface of the carbon black, and the lamellar structure of the oleic acid modified montmorillonite and the silicon dioxide modified carbon black can be interwoven to form a more complex and compact physical barrier network, so that the processability of the rubber sealing strip is greatly improved.

The invention belongs to the technical field of environmental protection, and provides a preparation method of an imine-modified functionalized mesoporous magnetic silicon dioxide nano material. The method comprises the following steps: synthesizing Fe3O4 magnetic nanoparticles in a Fe < 2 + > / Fe < 3 + > alkaline hydrolysis system through a coprecipitation method; then coating the magnetic nanoparticles with an amorphous silicon dioxide layer by taking TEOS (tetraethoxysilane) as a silicon source by adopting a sol-gel method, so as to prepare magnetic silicon coated nanoparticles; the prepared nano-particles are subjected to secondary silicon coating guided by a cetyl trimethyl ammonium bromide (CTAB) mesoporous template agent, and mesoporous magnetic silicon nano-particles are formed after calcination; and finally, carrying out surface amination modification on the mesoporous magnetic silicon nano-particles by utilizing an amino silane coupling agent, and then carrying out condensation reaction on the mesoporous magnetic silicon nano-particles and various aldehyde derivatives to construct imine bonds, so as to obtain the imine-modified functionalized mesoporous magnetic silicon dioxide nano-material. The imine-modified functionalized mesoporous magnetic silicon dioxide nano-material formed by the invention has the characteristics of efficient adsorption, rapid magnetic recovery and excellent environmental stability, and can effectively remove polystyrene micro-plastics and organic pollutants in a water body.

The invention discloses a low-temperature self-repairing polysiloxane material based on coordinate bonds and a preparation method and application thereof, and belongs to the field of novel materials.The low-temperature self-repairing polysiloxane material is prepared through the steps that amino of bis (3-aminopropyl)-terminated poly (dimethyl siloxane) and aldehyde group of an aldehyde group small molecule compound are subjected to a Schiff base condensation reaction, and a prepolymer is obtained; and adding metal ions into the prepolymer to carry out a coordination reaction to form a reversible metal coordination bond, and removing the solvent after the reaction is finished to obtain the low-temperature self-repairing polysiloxane material based on the coordination bond. The formed three-dimensional structure contains a large number of reversible metal coordination bonds, so that the rigidity and the mechanical strength of the material are enhanced, and meanwhile, the good self-repairing performance and the machinable recoverability of the material are ensured. The coordination bond-containing self-repairing polysiloxane material can be applied to the fields of adhesives, sealants, rapid self-repairing coatings, composite materials and the like.

The invention relates to the technical field of building materials, and discloses seawater-corrosion-resistant aluminoferrite cement concrete and a preparation method thereof.The seawater-corrosion-resistant aluminoferrite cement concrete is prepared through the steps that bis [3-(trimethoxysilyl) propyl] amine, perfluorohexyl ethylene and 3-bromopropylene serve as raw materials, addition and quaternization reactions are conducted, the raw materials are polymerized with acrylic acid monomers, and the seawater-corrosion-resistant aluminoferrite cement concrete is obtained. And then compounding with aluminoferrite cement, composite steel slag micro powder, modified basalt fiber and the like to obtain the concrete. The surface of siloxane of the fluorine-containing quaternary ammonium salt siloxane modifier is rich in silicon-oxygen bond functional groups, and the siloxane can be subjected to condensation reaction with silicon hydroxyl on the surface of a concrete base material after being hydrolyzed, so that pores and cracks in a concrete material are effectively filled; the composite steel slag micro-powder admixture is fine in particle, so that the system structure can be filled more tightly, and the capability of hindering permeation and diffusion of Cl <-> ions is improved; the modified basalt fiber improves the dispersion stability in a matrix, and the seawater corrosion resistance of the concrete is further improved.

The invention discloses a preparation method of sandwich type immunomagnetic beads with high thermal stability, which comprises the following steps: by taking polystyrene microspheres as a template, introducing oil-phase Fe3O4 nanoparticles into the polystyrene microspheres through a swelling method, and then carrying out hydrolytic condensation reaction on the surface of a microsphere assembly by utilizing n-octyltrimethoxysilane OTMS to obtain the sandwich type immunomagnetic beads with high thermal stability. The preparation method comprises the following steps: carrying out surface amination modification on a silicon dioxide thin layer which is grown by hydrolysis of tetraethoxysilane TEOS to realize coating of an outermost organic shell layer, carrying out surface amination modification, and carrying out cross-linking on 1, 4-butanediol diglycidyl ether and erythritol on the surface to form an epoxy polymer layer so as to obtain the sandwich-type immunomagnetic bead with a cross-linked epoxy polymer layer introduced to the outer layer. According to the epoxy group modification process on the surface of the magnetic bead, a direct cross-linking modification process is adopted, so that the operation steps are simplified, and the obtained epoxy group magnetic bead is ensured to show excellent biocompatibility. In addition, the method omits the tedious process of functional group activation, and allows direct coupling with the antibody, thereby greatly improving the efficiency and convenience of the experiment.

The present invention relates to a novel method for synthesizing olefin covalent organic framework foams, and polyimide, imine, hydrazone or Ketoenamine covalent organic frameworks (COFs). The method is a green synthetic strategy, including: under non-solvent condition, performing condensation reaction of a methyl-containing monomer and an aldehyde monomer with participation of acid anhydride or carboxylic acid compound to prepare olefin COFs; performing condensation reaction of a multihead acid anhydride or a multihead carboxylic acid monomer and an amino monomer with participation of acid anhydride or carboxylic acid compound to prepare amide COFs; and performing condensation reaction of the aldehyde monomer and the amino monomer with participation of acid anhydride, imidazole or carboxylic acid compound to prepare imine COFs. The COFs obtained by using the method have large specific surface area, regular and adjustable porous structure, and high crystallinity. The method effectively avoids use of organic solvent and risk of high pressure in the reaction process, and is suitable for large-scale preparation of COF materials.

The invention provides a preparation method of tert-butyl peroxybenzoate, and relates to the technical field of tert-butyl peroxybenzoate synthesis, the preparation method comprises the following steps: S1, pumping liquid caustic soda and water into a reaction kettle; s2, tert-butyl hydroperoxide is added into the reaction kettle for a salt forming reaction; s3, after the salt forming reaction is finished, benzoyl chloride and a catalyst are added for a condensation reaction, and a tert-butyl peroxybenzoate crude product is obtained; and S4, carrying out alkali washing and water washing on the tert-butyl peroxybenzoate crude product, and adding a stabilizer and a cosolvent to obtain a finished product. The preparation method can improve the yield and stability of tert-butyl peroxybenzoate.

The invention discloses high-stability mesoporous carbon as well as a preparation method and application thereof. The preparation method of the mesoporous carbon comprises the following steps: taking resorcinol and formaldehyde as raw materials, and performing condensation reaction under an acidic condition to obtain a phenolic resin precursor solution; uniformly adding a template agent into the phenolic resin precursor solution, standing to complete sol-gel conversion, and drying to obtain solid gel; carrying out carbonization treatment on the solid gel under an inert gas condition; and washing and drying in vacuum to obtain the mesoporous carbon material. According to the invention, high-purity resorcinol is adopted as a raw material, so that the influence of impurities on a mesoporous structure and material performance is reduced, and the thermal stability and structural stability of mesoporous carbon are improved; the pore size distribution is accurately and flexibly controlled by adding the template agent, and the pore size structure is adjusted, so that the specific surface area of the mesoporous carbon is increased.

The present invention relates to a method for isomerizing a product obtained by the condensation reaction of a ketone and a phenol to prepare a bisphenol, the method comprising contacting the product obtained by the condensation reaction of a ketone and a phenol to prepare a bisphenol with an ion exchange resin under aqueous conditions for isomerization of undesirable products and separation of products with a higher bisphenol content, wherein the ion exchange resin is an aromatic polymer having a sulfonic acid group, and the sulfonic acid group is modified by at least one promoter selected from the compound represented by structure (I):

The invention discloses a corrosion-resistant polysilsesquioxane modified polyurethane emulsion and a preparation method thereof, and belongs to the technical field of emulsions.The preparation method comprises the steps that gamma-aminopropyltriethoxysilane, namely APTES, is subjected to hydrolytic condensation under the catalysis of tetraethylammonium hydroxide, and POSS is prepared; the preparation method comprises the following steps: carrying out hydrolytic condensation reaction on APTES, synchronously adding phenyltrimethoxysilane in the hydrolytic condensation reaction, forming phenyl-amino difunctional POSS (Polyhedral Oligomeric Silsesquioxane) according to a molar ratio of phenyltrimethoxysilane to APTES of 1: 4, and grafting POSS and graphene oxide GO in dimethyl sulfoxide through amidation reaction to prepare a POSS / GO composite material; dispersing POSS / GO / Zn in the polyurethane prepolymer, adding a curing agent and a solvent, and stirring to form a homogeneous emulsion; through phenyl trapezoid polysilsesquioxane modification and dynamic reversible self-repairing network design, the wear resistance of the coating is improved, microcracks can be closed at the temperature of 60 DEG C, and the maintenance requirement is reduced; laser micro-nano structured base material treatment is combined, the adhesive force is increased to be larger than or equal to 20 MPa, and meanwhile a gamma-butyrolactone low-VOC solvent is adopted.

The invention discloses a preparation method of a multifunctional group synergistic modified aluminum silicate nanofiber membrane, which comprises the following steps: modifying aluminum silicate nanofiber by using an amino silane coupling agent to obtain aminated aluminum silicate nanofiber; grafting a polyamino compound to the surface of the aminated aluminum silicate nanofiber by utilizing the cross-linking effect of 1, 3-dichloropropanol through a substitution reaction of amino and chlorine, so as to obtain a multifunctional aluminum silicate nanofiber; 2-butenal is modified on the surface of the multi-functionalized aluminum silicate nanofiber by utilizing an ammonia-aldehyde condensation reaction, so that the multi-functionalized aluminum silicate nanofiber rich in double bonds is obtained; carrying out cross-linking polymerization by taking itaconic acid as a monomer and the multi-functional aluminum silicate nanofiber rich in double bonds as a cross-linking agent, then carrying out suction filtration to form a membrane, and drying to obtain the multi-functional synergistic modified aluminum silicate nanofiber membrane with the gram weight not exceeding 15g / m < 2 >. According to the invention, high-efficiency adsorption of heavy metals is realized, and the problem that aluminum silicate nanofibers are not easy to recover is solved.

The invention provides an organic functional group modified silicon negative electrode material as well as a preparation method and application thereof, and belongs to the field of battery negative electrode materials. The method comprises the following steps: pre-hydrolyzing a silane coupling agent to obtain a mixed solution; adding a silicon material into the mixed solution to bond a silane coupling agent on the surface of the silicon material to obtain an intermediate; and performing in-situ polymerization on the intermediate, a polymer monomer and an initiator to form a conductive polymer on the surface of the intermediate, thereby obtaining the silicon negative electrode material. The preparation method comprises the following steps: firstly, carrying out condensation reaction on a hydrolyzable functional group of a silane coupling agent and silicon hydroxyl on the surface of the photovoltaic silicon waste after hydrolysis to form chemical bonding; meanwhile, non-hydrolytic functional groups in the silane coupling agent are partially retained on the surfaces of the silicon particles, so that polymerization sites are provided for subsequent polymerization reaction; and then modification of different organic functional groups is realized through simple in-situ polymerization, so that a confinement effect and stress dissipation in a particle expansion process are realized, and huge volume expansion of the silicon particles is relieved.

The invention relates to the field of artificial leather, and discloses a high-dispersion halogen-free flame retardant polyether polyol composite material and a preparation method thereof, and the high-dispersion halogen-free flame retardant polyether polyol composite material comprises the following components by mass: 60-75 parts of a polyether polyol matrix; 20 to 30 parts of a core-shell synergistic flame retardant; 3 to 5 parts of a hyperbranched polysiloxane dispersant; 2-5 parts of a nano zinc borate synergist; 0.5 to 1 part of an anti-dripping agent; the preparation method comprises the following steps: preparing a phosphorus-nitrogen core-shell flame retardant; premixing with polyether polyol, and performing dynamic condensation to form a bonding interface; carrying out ultrasonic-shearing synergistic dispersion on the nano material; and finally, carrying out underwater pelletizing to obtain the high-dispersion halogen-free composite material. According to the invention, through cooperation of core-shell flame-retardant structure design and a dynamic process, and combination of hyperbranched dispersant multi-point anchoring and ultrasonic-shear energy field dispersion technologies, efficient dispersion of a flame retardant and a nano material is realized; the interfacial condensation reaction is accurately controlled through a low-oxygen environment, and the flame retardant efficiency and thermal stability of the material are improved.

The invention discloses a nano suspension slow-release water-soluble fertilizer. A polymer biodegradable film material is pretreated and then is subjected to a condensation reaction with an aldehyde substance under an acidic condition, and then a nitrogen-containing fertilizer is added; adding a dispersing agent and sodium silicate to obtain a solution A; performing cross-linking reaction on fatty alcohol-polyoxyethylene ether and carboxymethyl cellulose, and then adding liquid oil to obtain a solution B; mixing the solution A and the solution B, adding water glass, adjusting the pH to be nearly neutral, and adding an anti-crystallization material to obtain a solution C; and adding an anti-skinning agent and a slow-release inhibiting material into the solution C, uniformly mixing, and adding into the fertilizer. The fertilizer prepared from the waste polymer biodegradable film material has the characteristics of high suspension degree, high stability, high fluidity and homogeneous phase, and is easily compounded with other elements and media. The method is simple and easy to apply, saves energy and raw materials, and is low in production cost and remarkable in synergism.

The invention relates to the field of pinacolone condensation reaction processing, in particular to a pinacolone condensation reaction exhaust device capable of preventing liquid accumulation and an exhaust method, the pinacolone condensation reaction exhaust device comprises a pinacolone reaction kettle, and a feeding pipe is connected above the pinacolone reaction kettle in a penetrating manner. Waste gas makes contact with all the sets of curved condensation pipes which are annularly distributed and installed, the conveying and contact efficiency of the waste gas can be improved through a turbofan, when the waste gas enters the exhaust barrel, the waste gas can make full contact with a conical condensation ring and a conical condensation plate which are specially arranged, and therefore secondary condensation is conducted on the waste gas, and the waste gas can be recycled. The liquid component in the waste gas can be thoroughly condensed and formed, finally falls down, is collected into a space formed by the flange butt joint pipe and the conical frame, and is discharged out of the water inlet pipe I, so that the liquid component in the waste gas can be effectively separated; therefore, the pipeline can be effectively protected and the pipeline is prevented from being blocked by accumulated liquid in the exhaust gas emission process, and meanwhile, the exhaust gas treatment efficiency and quality can be improved.

The invention provides a multi-aperture two-dimensional covalent organic framework material based on carbon-carbon double bond connection as well as a preparation method and application of the multi-aperture two-dimensional covalent organic framework material. The preparation method comprises the following steps: (1) under a protective atmosphere, putting 6, 6 '-dimethyl-3, 3'-bipyridazine, a multi-aldehyde aromatic monomer and benzoic anhydride into an ampoule bottle, the multi-aldehyde aromatic monomer being selected from a tri-aldehyde aromatic monomer or a tetra-aldehyde aromatic monomer; and (2) quickly freezing the ampoule bottle in the step (1) in a 77K liquid nitrogen bath, carrying out unfreezing circulation degassing through three freezing pumps, carrying out heating reaction at 150-250 DEG C for 72-120 hours, cooling to room temperature, and carrying out post-treatment to obtain the multi-aperture two-dimensional covalent organic framework material based on carbon-carbon double bond connection. The two-dimensional COFs obtained by performing a Navenger condensation reaction on an active methyl monomer and a multi-aldehyde aromatic monomer has relatively high crystallinity, specific surface area and stability, uniform two-dimensional layered morphology and a relatively wide absorption spectrum range, and the topological structure of the COFs comprises a uniform pore diameter and three different pore diameters.

The present invention discloses a preparation method of yellow azoxy and azo stilbene dyes. Using 4-nitrotoluene-2-sulfonic acid as a raw material and water as a reaction solvent, in the presence of choline hydroxide, dye yellow 11 is obtained through a condensation reaction. The molecular structure of choline hydroxide contains a quaternary ammonium salt group and a hydroxyl group. The hydroxyl group provides additional hydrophilicity, which helps to improve the solubility and dispersibility of the dye in an aqueous medium and enhance the affinity between the dye and the fiber. Choline hydroxide can effectively provide the alkaline environment required for the reaction, promote the synthesis reaction of the dye, and better control the selectivity and yield of the reaction. Since the choline hydroxide molecule contains a hydroxyl group, it can form hydrogen bonds with the sulfonic acid groups in the dye molecule, enhance the stability between dye molecules, and improve the light fastness and acid and alkali resistance of the dye. Using choline hydroxide not only optimizes the reaction conditions, improves the purity and yield of the dye, but also significantly improves the performance of dye yellow 11.

The invention relates to the field of oil storage microcapsules, and discloses a porous covalent organic framework oil storage microcapsule as well as a preparation method and application thereof. Under the catalysis of p-toluenesulfonic acid, 4, 4 ', 4' '-(1, 3, 5,-triazine-2, 4, 6-triyl) triphenylamine and trialdehyde phloroglucinol monomers are promoted to be subjected to condensation reaction in the repeated oscillation process, a product is purified to prepare a 4, 4', 4 ''-(1, 3, 5,-triazine-2, 4, 6-triyl) triphenylamine covalent organic framework, and by means of a periodic pore structure of the covalent organic framework, the covalent organic framework can be used for preparing the covalent organic framework. And the lubricating oil is adsorbed and stored and can be controllably separated out to provide lubrication during working, so that a high-performance self-lubricating effect can be realized. In addition, covalent organic frameworks are used as hard particles to be doped into a polymer matrix to modify the polymer matrix, so that the wear resistance of the polymer matrix can be greatly enhanced, and the performance of the self-lubricating bearing material is improved.

The invention belongs to the technical field of skin care product raw materials, and discloses an oligopeptide compound, a preparation method thereof, a beautifying composition and application. The oligopeptide compound has a structural formula of # imgabs0. The oligopeptide compound provided by the invention contains peptide fragments of antioxidant amino acids such as tyrosine (Tyr), beta-alanine (beta-Ala), cysteine (Cys) and proline (Pro), and the amino acids can directly participate in removal of free radicals or form a stable peptide structure to enhance the antioxidant effect; therefore, the oligopeptide compound with anti-oxidation and physiological repair effects is obtained. Meanwhile, a mild Fmoc route is adopted in the preparation method, the condensation reaction time of each step is short, the production period is greatly shortened, raw materials are convenient to obtain, the process is stable, the quality is controllable, the product yield and purity are high, and large-scale production can be achieved.

The invention discloses a refining device and method for a polymerization product and application. The refining device comprises an aldehyde removal tower, a dehydration tower, a water separation tank, a light component removal tower, a byproduct tower and a product tower. According to the present invention, the reaction product obtained through the ethylene glycol dehydration condensation reaction contains water, acetaldehyde, diethylene glycol, 1, 4-dioxane, 2-methyldioxocyclopentane and other components, and has characteristics of complex components and coexistence of multiple azeotropic pairs, and the invention provides the sequential rectification method by introducing the azeotropic breaking component according to the composition, therefore, a diethylene glycol product with high purity and byproducts of acetaldehyde and 1, 4-dioxane are separated, the process is continuous and easy to operate, and the method has industrial feasibility.

The invention discloses an integrated reaction process for preparing potassium fluoborate through efficient conversion of fluosilicic acid, and relates to the technical field of inorganic fluorine chemical industry, and the potassium fluoborate is prepared through the technologies of complexing metal impurities through EDTA disodium, catalyzing condensation reaction through Fe-TiO2, carrying out K2CO3 / nano gamma-Al2O3 composite desilicication, deeply removing sodium through ion exchange and carrying out mother liquor closed-loop circulation. The problems of serious sodium pollution, low reaction efficiency and resource waste in the traditional process are solved. The composite desiliconization agent improves the desiliconization rate to 96%, the reaction time is shortened by 40% through nanometer catalysis, the mother liquor recycling rate is 80%, and the silicon slag is converted into high-added-value nanometer white carbon black. The product purity is greater than or equal to 99.5%, the sodium residue is less than or equal to 0.003%, and the method is suitable for industrial production of electronic-grade potassium fluoborate.

The invention relates to a self-crosslinking flame-retardant insulating material and a preparation method thereof, and belongs to the technical field of insulating material preparation. The self-crosslinking flame-retardant insulating material comprises the following raw materials: polyethylene, modified vinyl silane, an epoxy flame retardant, a water producing agent, a catalyst and an initiator, the modified vinyl silane is prepared from a ring-opening reaction product and a diamine compound through a condensation reaction; the ring-opening reaction product is prepared from an epoxy silane coupling agent and a 2, 2-dimethylolpropionic acid derivative through a reaction; the 2, 2-dimethylolpropionic acid derivative is prepared from 2, 2-dimethylolpropionic acid and acrylic acid through esterification reaction; the epoxy flame retardant is prepared from a hydroxyl-terminated dendritic compound and an epoxidation agent through an epoxidation reaction; the hydroxyl-terminated dendritic compound is prepared from hexachlorocyclotriphosphazene and alkyl binary primary alcohol through a substitution reaction. By introducing the modified vinyl silane and the epoxy flame retardant, a bi-crosslinking interpenetrating network is formed in the obtained material, so that the problems in the background technology are solved.