3263 results about "Acyl chloride" patented technology

The invention relates to the technical field of organic synthesis, and discloses a preparation method of bromo-pyrrole nitrile. The method comprises the following steps: (1) mixing p-chlorophenylglycine, acetonitrile, trifluoroacetic acid and a catalyst, then dropwise adding acyl chloride and carrying out acylation reaction, and after the reaction is completed, purging with an inert gas; (2) under the inert gas, mixing the mixture obtained in the step (1) with inorganic salt, then dropwise adding 2-chloroacrylonitrile, carrying out cyclization reaction, and separating a liquid phase from the obtained mixture; and (3) under the inert gas, mixing the liquid phase obtained in the step (2), hydrobromic acid and hydrogen peroxide, carrying out a bromination reaction, then extracting with acetonitrile to obtain an acetonitrile layer, then removing the acetonitrile, and then carrying out cooling crystallization to obtain the bromo-pyrrolenitrile. According to the technical scheme, the reaction yield is high, different solvents do not need to be frequently replaced, and the solvents can be recycled.

The invention belongs to the technical field of flame-retardant materials, and particularly relates to a phenylboronic acid-based P / N / B-containing halogen-free flame retardant, a preparation method thereof and application of the phenylboronic acid-based P / N / B-containing halogen-free flame retardant in epoxy resin. The preparation method comprises the following steps: by taking diphenyl hypophosphorous chloride as a basis, preparing a flame-retardant intermediate through nucleophilic substitution reaction between diphenyl hypophosphorous chloride and an aldehyde group-containing phenolic compound, then reacting a phenylboronic acid structure with 3-amino-1, 2-propylene glycol to obtain an amino group-containing phenylboronic acid compound, and finally reacting the phenylboronic acid compound with 3-amino-1, 2-propylene glycol to obtain the amino group-containing phenylboronic acid compound. And finally, carrying out a Schiff base reaction on the flame-retardant intermediate and an amino-containing phenylboronic acid compound to obtain the halogen-free flame retardant containing phosphorus, nitrogen and boron elements. The flame retardant provided by the invention can significantly improve the flame retardant property and mechanical property of epoxy resin. A flame-retardant epoxy resin prepared based on the flame retardant; the influence on Tg of an epoxy resin cured product is small, the smoke suppression and char formation performance and the mechanical performance of the cured product can be remarkably improved, and meanwhile, the flame retardant has excellent flame retardant efficiency; the limit oxygen index of the flame-retardant epoxy resin can reach 31%; the vertical combustion grade is V-0 or above, and the carbon residue amount can reach 18% or above.

The invention provides a PVDF (Polyvinylidene Fluoride) nanofiltration membrane constructed on the basis of microwave-enhanced bridging interfacial polymerization as well as a preparation method and application of the PVDF nanofiltration membrane. The method comprises the following steps: reacting PVDF powder with an organic alkali to prepare a modified film-forming solution, blade-coating the modified film-forming solution on a non-woven fabric supporting layer, placing the non-woven fabric supporting layer in an ethanol-water or methanol-water coagulating bath, and preparing a PVDF supporting film by virtue of assistance of an ice template; weighing the functionalized nano material and an amino silane coupling agent, performing ultrasonic dispersion, and adding a catalyst for reaction to obtain dispersion liquid; immersing a PVDF support membrane into the dispersion liquid to obtain a modified membrane; immersing the modified membrane into an aqueous solution containing an amine monomer and an organic solution containing an acyl chloride monomer, and carrying out microwave radiation. The interface reaction rate and selectivity are enhanced through the microwave excitation effect, and meanwhile, the hydrophilicity and reaction activity of the PVDF base membrane are cooperatively regulated and controlled, so that the separation efficiency and the anti-pollution capacity of the membrane are remarkably improved. The obtained PVDF nanofiltration membrane has high flux, high selectivity and excellent structural stability, and is suitable for efficient purification and resource recovery application in a complex water system.

The invention discloses a desalting membrane as well as a preparation method and application thereof, and relates to the technical field of membrane separation. The desalting membrane comprises a porous ultrafiltration base membrane and a functional layer formed on the surface of the porous ultrafiltration base membrane; the functional layer is formed by copolymerizing and cross-linking a polyamine monomer, a zwitterionic multi-element hydroxyl monomer and an acyl chloride monomer through an interfacial polymerization reaction. The preparation method comprises the following steps: providing the porous ultrafiltration base membrane; coating the surface of the porous ultrafiltration base membrane with an alkaline water-phase solution containing a polyamine monomer and a zwitterionic multi-hydroxyl monomer to form a water-phase solution layer; coating an oil-phase solution containing an acyl chloride monomer on the surface of the water-phase solution layer to form a functional layer; and performing heat treatment. The invention also provides application of the desalination membrane in any one of seawater desalination, brackish water desalination, wastewater treatment and material separation and concentration. According to the invention, zwitter-ion-based multi-hydroxyl monomers are introduced into water-phase monomers to participate in interfacial polymerization, and a super-hydrophilic nano-channel is constructed in a separation layer, so that the water flux and the desalination rate of the membrane are remarkably improved.

The invention discloses a fine circuit pattern anti-diffusion agent as well as a preparation method and a use method thereof, and relates to the technical field of printed circuit board manufacturing. The fine circuit pattern anti-diffusion agent is prepared from the following components in percentage by mass: 0.05 to 0.3 percent of an oleophobic agent, 0.1 to 0.6 percent of a bonding agent, 0.2 to 1.5 percent of an adhesion promoter, 0.5 to 4.0 percent of a wetting agent, 0.5 to 5.0 percent of a cosolvent and the balance of water, the oleophobic agent is a fluorophenylethylamine derivative, the bonding agent is a carbonyl chloride derivative, the adhesion promoter is a sulfur heterocyclic alkane derivative, the wetting agent is a methylsiloxane silane derivative, and the cosolvent is a sulfonyl ketone derivative. According to the fine circuit pattern anti-diffusion agent, an organic layer can be formed on the copper surface of a circuit board, the binding force between the copper surface and printing ink is enhanced, jet printing printing ink is prevented from diffusing on the copper surface, and the product percent of pass of a jet printing solder mask process is improved.

The invention discloses a high-performance composite solvent-resistant nanofiltration membrane with a rigid twisted non-planar structure polyamide layer and a preparation method of the high-performance composite solvent-resistant nanofiltration membrane. The preparation method comprises the steps of preparation of the rigid twisted non-planar structure polyamide layer and surface modification. A water phase solution containing adamantane diamine and m-phenylenediamine and an organic phase solution containing 1, 3, 5-trimesoyl chloride and acetone are subjected to interfacial polymerization reaction to prepare a polyamide layer with a rigid twisted non-planar structure, and then a polyphenol modifier is used for carrying out hydrophilic modification on the polyamide layer, so that the rigid twisted non-planar structure is obtained. The pure water permeability and retention rate of the solvent-resistant nanofiltration membrane are obviously improved; due to the introduction of adamantane diamine, the interfacial polymerization process and the formation of a polyamide layer are remarkably regulated and controlled, and the separation performance of the solvent-resistant membrane is greatly improved on the premise that the interception performance of the membrane is hardly reduced; the preparation process is simple, and the prepared membrane is excellent in performance and has a good application prospect in the aspect of organic solvent separation.

The present invention discloses a perfluoromethylcyclohexanone microcapsule fire extinguishing medium and its preparation process, which relates to the field of fire fighting technology. A perfluoromethylcyclohexanone microcapsule fire extinguishing medium is composed of a core material and a shell material. The core material includes perfluoromethylcyclohexanone, silicon dioxide, and azobisisobutyronitrile. The shell material includes modified guar gum, acrylic resin, aluminum hydroxide, potassium nitrate, and an emulsifier. The modified guar gum is prepared by the following method: tetrahydrofuran, guar gum, and triethylamine are sequentially added into a reactor, stirred and mixed evenly, and then a tetrahydrofuran solution of diphenylphosphinyl chloride is added dropwise. After the addition is completed, the temperature is raised to 75-85°C and the reaction is carried out for 10-14 hours, followed by post-treatment to obtain diphenylphosphinyl chloride-modified guar gum. The present invention modifies guar gum with diphenylphosphinyl chloride and then uses the modified guar gum for the shell material of perfluoromethylcyclohexanone microcapsules, improving the fire extinguishing performance, heat resistance, and long-term stability of perfluoromethylcyclohexanone microcapsules.

The invention discloses a high-salt-rejection and pollution-resistant polyamide reverse osmosis membrane, which is characterized in that an aromatic cationic surfactant containing two benzene ring structures is adopted to regulate and control the interfacial polymerization reaction of a polyamine monomer and a polyacyl chloride monomer, and a high-salt-rejection and pollution-resistant polyamide functional layer is generated on a porous ultrafiltration base membrane. The effective specific surface area of the polyamide functional layer of the reverse osmosis membrane is gt; 1.2, the surface potential gt when the pH is equal to 7; -20 mV; the molecular weight cut-off of the polyamide reverse osmosis membrane is 1t; the molecular weight is 100Da, and the retention rate for 2000ppm of NaCl is gt; the anti-fouling coating has the advantages of good hydrophilicity and excellent anti-fouling performance. The preparation process of the polyamide reverse osmosis membrane is simple and efficient, and has industrial application potential. The polyamide reverse osmosis membrane can be used for purification and treatment of different types of water, and has important application value.

The invention discloses a low-cost and environment-friendly process for producing 1, 4-bis (4-fluorobenzoyl) benzene, and belongs to the technical field of Friedel-Craft reaction, fluorobenzene and paraphthaloyl chloride react to generate 1, 4-bis (4-fluorobenzoyl) benzene, after reaction quenching, filtering is performed to obtain a crude product 1, 4-bis (4-fluorobenzoyl) benzene and filtrate, and the 1, 4-bis (4-fluorobenzoyl) benzene is purified in a sublimation crystallization mode; standing and layering the filtrate in an inclined plate layering device, respectively treating an oil layer and a water layer, dehydrating a fluorobenzene layer in a dehydrating tower, and returning fluorobenzene; the water phase is firstly subjected to organic matter removal treatment, the obtained organic matter enters a fluorobenzene recovery device to be sleeved back, and the obtained water phase is a byproduct of crystallized aluminum chloride in an evaporative crystallization device. According to the process, the 1, 4-bis (4-fluorobenzoyl) benzene is produced in a sublimation crystallization mode instead of a solution crystallization mode, no waste solvent is generated, the waste solvent does not need to be recycled, the cost is low, organic matter removal and evaporative crystallization treatment is carried out on wastewater, organic matter recycling is carried out, crystalline aluminum chloride is produced as a byproduct, and wastewater and waste salt are not discharged.

The invention relates to the technical field of material science and engineering, and discloses a nanocellulose-based oil-water separation and adsorption composite material, which is prepared from the following raw materials in parts by mass: 35 to 45 parts of nanocellulose; 8 to 11 parts of bagasse cellulose; 10 to 15 parts of sodium lignin sulfonate; 4 to 8 parts of chitosan; 5-10 parts of oxidized starch; 5 to 8 parts of cellulose nanowhiskers; 2-5 parts of silicon dioxide nanoparticles; 0.5 to 1 part of calcium carbonate nanoparticles; 1-2 parts of a citric acid cross-linking agent; 1-2 parts of graphene oxide; 0.3 to 0.6 part of ethylene diamine tetraacetic acid; 2-5 parts of glycerol; 0.4 to 1 part of stearoyl chloride; 2-4 parts of nano iron oxide; the preparation method comprises the following steps: pretreating the raw materials, mixing the pretreated raw materials into slurry, carrying out crosslinking and ultrasonic dispersion, standing to obtain a basic mixture, injecting the basic mixture into a mold, carrying out freeze drying to form a photocatalytic layer, carrying out centrifugal dewatering, carrying out chelation reaction, spraying a composite solution, and carrying out vacuum drying to obtain the photocatalytic material. The obtained composite material has the advantages of efficient adsorption capacity, good mechanical properties, environmental friendliness, degradability and low preparation cost.

The invention relates to a preparation method of a nanofiltration membrane containing a covalent organic framework (COF) interlayer. The nanofiltration membrane (NF) comprises a base membrane, an interlayer and a separation surface layer. The interlayer is formed by in-situ growth of polyphenol and diamine under the action of an oxidizing agent, and the separation surface layer is formed by an aqueous-phase active monomer and multi-element acyl chloride through an interfacial polymerization reaction. According to the invention, an imino covalent organic framework (TpPa-COF) film interlayer is introduced, and a surface polyamide layer is prepared through interfacial polymerization, so that the hydrophilicity of the film and the ability of removing divalent cations are improved. The invention aims to solve the problem of balance between low flux and high separation effect of an NF membrane in separation of monovalent / divalent cations, maintain ideal water flux while ensuring high separation effect, and solve the problem that a traditional NF membrane separation layer has defects. The two-dimensional TpPa-COF material can effectively control the pore size distribution and hydrophilicity of the surface of the substrate and improve the separation performance of the composite membrane. The preparation method is simple, and the obtained nanofiltration membrane has a wide application prospect.

The invention discloses a skin-friendly antibacterial spinning yarn and a preparation method thereof, and relates to the field of spinning yarns. When the skin-friendly antibacterial spinning yarn is prepared, 3-amino-1, 2, 4-triazine and vinyl phosphonyl chloride are subjected to a reaction, and a phosphorus-nitrogen flame-retardant monomer is obtained; activating bamboo nano-cellulose with ammonium ceric nitrate, grafting a phosphorus-nitrogen flame-retardant monomer, and performing electrostatic spinning to obtain modified bamboo nano-cellulose coated fibers; dipping polyester filament yarns in dopamine hydrochloride and sodium hypochlorite in sequence to obtain modified polyester core yarns; the modified bamboo nano-cellulose wrapping fiber and the modified polyester core yarn are twisted through a ring spinning frame and then react with 3, 3 ', 4, 4'-benzophenone tetracarboxylic dianhydride, and the skin-friendly antibacterial spinning yarn is obtained. The skin-friendly antibacterial spinning yarn prepared by the method has excellent skin-friendly antibacterial property, flame retardance, aging resistance and mechanical property.

The invention relates to the field of cables, and discloses a modified polyvinyl chloride composite material for cables and a preparation method thereof.The composite material comprises low-density polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, nitrile rubber, modified graphene oxide, modified nano calcium carbonate and auxiliaries; the modified graphene oxide is prepared by reacting acylating chlorination of graphene oxide with an anti-aging derivative, the anti-aging derivative is prepared by reducing a benzoxazole-containing intermediate generated by a reaction of 2-amino-4-bromophenol and 4-cyanobenzaldehyde to obtain an aminated benzoxazole-containing intermediate, then the aminated benzoxazole-containing intermediate reacts with p-phenylenediamine, and then the product reacts with 3-(3, 4-dichlorophenyl)-1, 2, 3-triazole-3-one to obtain the anti-aging graphene oxide. 2, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride is subjected to a reaction to prepare the product. And the modified nano calcium carbonate is prepared by reacting phosphonitrilic chloride trimer with an amino silane coupling agent and 2-amino benzoxazole-5-borate and then grafting on the surface of the nano calcium carbonate. The composite material prepared by the invention has excellent flame retardance, heat resistance and long-acting oxidation resistance.

The invention belongs to the technical field of acyclic compounds, and particularly relates to a preparation method of tert-butyl peroxyisobutyrate. Stirring and cooling a solvent, a tert-butyl hydroperoxide aqueous solution and deionized water to obtain a mixed solution A; adding liquid caustic soda and a solid base catalyst into the mixed solution A under a stirring condition, and continuously stirring for reaction to obtain a mixed solution B; under the stirring condition, isobutyryl chloride and a water-soluble distributing agent are added into the mixed solution B, stirring reaction continues to be conducted, and a mixed solution C is obtained; standing and layering the mixed solution C, separating to obtain a tert-butyl peroxyisobutyrate crude product, and refining the tert-butyl peroxyisobutyrate crude product to obtain the tert-butyl peroxyisobutyrate. According to the method, the raw material utilization rate is increased, the reaction speed is increased, the reaction time is shortened, and the product yield is high.

A flame-retardant laminated solid wood composite floor and a manufacturing method therefor. The manufacturing method comprising: first reacting dopamine hydrochloride with acryloyl chloride to generate a dopamine acrylamide monomer; by means of a double bond in the dopamine acrylamide monomer, carrying out a click reaction with a phosphate monomer containing a sulfydryl group, so as to introduce a catechol group into a side chain of the phosphate monomer and obtain a flame-retardant monomer containing the double bond; and then mixing pentaerythritol tetra(3-mercaptopropionate), pentaerythritol triacrylate, perfluorodecanethiol and the flame-retardant monomer containing the double bond to obtain a photocurable coating material. The coating material is photocured after being coated on the surface of a wood veneer, thus effectively improving the flame-retardant performance of the wood veneer; moreover, the adhesion between the coating layer and the wood veneer is excellent. The wood veneers are laminated in multiple layers, are glued and assembled into a layered structure, and then hot-pressed to form the solid wood composite floor, thus improving the comprehensive performance.

The invention relates to a preparation method of a nanofiltration membrane, the nanofiltration membrane prepared by the preparation method and application of the nanofiltration membrane. The method comprises: treating a base membrane having a polyamide layer thereon to convert acyl chloride groups in the polyamide layer into carboxyl groups, the base membrane comprising a reinforcing material layer and a polymer layer; activating the carboxyl group, wherein the activating treatment is carried out by using a solution containing a carboxyl group activating agent; contacting with a solution containing amino polyethylene glycol substances; contacting with a solution comprising a cross-linking agent; contacting with a solution comprising at least one of a polyhydroxy polymer and a polyhydroxy compound. The method is simple and easy to operate, reaction parameters are easy to regulate and control, and continuous industrial production can be achieved. The nanofiltration membrane prepared by the invention has stable and excellent comprehensive performance (permeability, separation performance, pollution resistance, scratch resistance and thick net bruise resistance). The nanofiltration membranes of the invention can be advantageously used for filtration, separation, and / or concentration.

The invention relates to the technical field of gas separation membranes, in particular to a gas separation membrane based on a metal organic cage and a preparation method and application of the gas separation membrane based on the metal organic cage, a solution containing metal salt, an organic ligand and an organic solvent is prepared and reacts for 2-160 h at the temperature range of 50-200 DEG C, and a metal organic cage material is obtained; preparing a water-phase dispersion liquid containing a metal organic cage and an organic-phase reaction liquid containing polyacyl chloride or polyaldehyde; placing the organic phase reaction liquid on the surface of a support membrane to obtain a support membrane adsorbing an organic phase monomer; placing the water-phase dispersion liquid on the surface of a support membrane adsorbing an organic-phase monomer to obtain a nascent state separation membrane; the operation is repeated, the organic phase reaction liquid and the water phase dispersion liquid are poured on the surface of the nascent state separation membrane for multiple times, and the gas separation membrane based on the metal organic cage is obtained. The metal organic cage gas separation membrane prepared by the invention has high CO2 permeation rate, relatively high CO2 / N2 and CO2 / H2 separation factors and good long-term operation stability.

The invention relates to the technical field of polyester fibers, and discloses a preparation method of antibacterial modified polyester hollow fibers, which comprises the following steps: by taking nitrilotriacetic acid, thionyl chloride, epoxy chloropropane, eugenol and the like as raw materials, carrying out acylating chlorination reaction, quaternization reaction and esterification reaction to obtain eugenol epoxy quaternary ammonium salt. The preparation method comprises the following steps: carrying out ring-opening reaction on carboxyl groups in graphene oxide and epoxy groups in eugenol epoxy quaternary ammonium salt to obtain modified graphene, uniformly mixing the modified graphene with polyethylene glycol terephthalate, and carrying out a series of steps to finally obtain the antibacterial modified polyester hollow fiber. Eugenol and quaternary ammonium salt are utilized to improve the antibacterial property of the polyester hollow fiber, and graphene is utilized to improve the mechanical property of the polyester hollow fiber. The polyester hollow fiber prepared by the invention has excellent mechanical properties and antibacterial properties.

The invention provides a polyimide multilayer composite membrane material as well as a preparation method and application thereof, and belongs to the technical field of gas separation. According to the method, through collaborative design of a functional support layer, a gradient MOF layer and an ultrathin selection layer structure, the problems of support layer pore seepage, MOF agglomeration, weak interface bonding and the like in an existing composite membrane material are solved. The preparation method comprises the following steps: firstly, carrying out electrostatic spinning on a polyamide acid glue solution, and synchronously introducing dopamine by adopting a chemical imidization method to prepare a functionalized polyimide fiber membrane containing hydroxyl and amino on the surface, so that the mechanical property of a supporting layer and the MOF anchoring capability are remarkably improved; growing MOF layers with different particle sizes on the surface of the fiber membrane by regulating and controlling the concentration gradient of ligand / metal salt and the reaction time, and passivating through a silane coupling agent after each step of growth so as to avoid heterogeneous nucleation and construct a gradient structure; after the MOF gradient layer is subjected to Ar plasma pretreatment to introduce hydroxyl, the ultrathin polyamide selection layer is formed by utilizing interfacial polymerization of fluorine-containing acyl chloride and a macrocyclic amine monomer, and the ultrathin polyamide selection layer is suitable for gas separation work.

The invention relates to the field of plastic bags, and discloses a biodegradable plastic bag and a preparation method thereof, the biodegradable plastic bag comprises polylactic acid, poly (butylene adipate-co-terephthalate), a functional additive, modified starch, a lubricant and an antioxidant; the functional additive is prepared by grafting hydroxylated modified castor oil and isocyanated montmorillonite loaded titanium dioxide; the hydroxylation modified castor oil is prepared by modifying castor oil with chloroethyl isocyanate, then reacting with N-allylimidazole, and then reacting with 6-mercaptohexyl-1-alcohol; the isocyanated montmorillonite loaded titanium dioxide is prepared by reacting montmorillonite loaded titanium dioxide obtained by a sol-gel method with isophorone diisocyanate; the modified starch is prepared by reacting octadecanoyl chloride and acryloyl chloride with starch, then carrying out graft copolymerization with ethyl acrylate and further introducing glycidyl methacrylate, so that the plastic bag is endowed with excellent mechanical properties, biodegradability and antibacterial property.

The invention discloses a surface-enhanced tryptophan modified nanofiltration membrane as well as a preparation method and application thereof. Belongs to the field of water treatment membrane preparation. The invention aims to solve the technical problems of non-uniform pore size distribution and surface hydrophobicity of the conventional nanofiltration membrane. The method comprises the following steps: adding tryptophan into a piperazine water-phase solution, and carrying out interfacial polymerization with oil-phase trimesoyl chloride to prepare the tryptophan modified nanofiltration membrane. According to the preparation method, the diffusion rate of the piperazine monomer can be adjusted in the interfacial polymerization process by utilizing a similar surfactant structure of tryptophan, meanwhile, the tryptophan has hydrophilicity and can improve the hydrophilicity of the surface of an active layer, and the prepared modified nanofiltration membrane is reduced in molecular weight cut-off, improved in surface hydrophilicity and good in water resistance. The retention rate of organic micro-pollutants is improved, and meanwhile, good anti-pollution performance is achieved.

The invention discloses an electrolytic adhesive, an electrolytic cotton adhesive tape and a preparation method of the electrolytic adhesive. The electrolytic cotton adhesive tape comprises the following components in parts by weight: 5-10 parts of 1, 1 '-ferrocene diformyl chloride, 10-15 parts of acrylic acid beta-cyclodextrin ester, 3-8 parts of polyethylene glycol diglycidyl ether, 10-20 parts of ionic liquid, 1.5-3 parts of a cross-linking agent, 10-15 parts of tackifying resin and 0.5-1.5 parts of an initiator, and a polymer matrix comprises an acrylic acid-hydroxypropyl acrylate copolymer and acrylic acid-2-ethylhexyl ester. Comprising an adhesive layer and an adhesive tape base layer, the adhesive layer is prepared from the electrolytic adhesive, and the adhesive tape base layer is prepared from acrylic foam; the obtained electrolytic cotton adhesive tape has high initial adhesion and viscosity strength after power-on and power-off re-adhesion.

The invention relates to the field of packaging materials, and discloses low-temperature heat-sealing water-based coated paper and a preparation method and application thereof.The water-based coated paper comprises a base paper layer and a water-based coating, and the water-based coating comprises water-based ethylene-acrylic acid copolymer emulsion, modified nano-silica, a coalescing agent and water; a cardanol derivative is introduced into the water-based ethylene-acrylic acid copolymer emulsion as a functional component; the cardanol derivative is prepared by reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and then grafting with acryloyl chloride. The preparation method comprises the following steps: reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; the modified nano silicon dioxide is prepared by mixing aminated nano silicon dioxide and chitosan and adding a cross-linking agent prepared by grafting phytic acid and ethylene glycol diglycidyl ether. The water-based coating paper prepared by the invention overcomes the defects that the existing BOPP film is not environment-friendly, and the conventional coating paper is high in heat sealing temperature and easy to stick; meanwhile, good mechanical properties, water resistance and flame retardance are achieved.

The invention belongs to the technical field of membrane separation, and particularly relates to a nanofiltration membrane for efficient salt dyeing separation and a preparation method and application thereof.The preparation method comprises the following steps that 1, ionic liquid and water are mixed to obtain a mixed solution, cycleanine is dissolved in the mixed solution to obtain a water-phase solution, and the water-phase solution is filtered to obtain a filtrate; pouring the water-phase solution to the surface of the base membrane and completely infiltrating the water-phase solution; and 2, dissolving isophthaloyl dichloride in normal hexane to obtain an organic phase solution, pouring the organic phase solution to the surface of the membrane treated in the step 1, and carrying out an interfacial polymerization reaction to obtain the nanofiltration membrane for efficient salt dyeing separation. According to the preparation method disclosed by the invention, the nanofiltration membrane prepared by taking cycleanine and isophthaloyl dichloride as monomers through interfacial polymerization has a highly-ordered honeycomb nanopore structure, charges on the surface of the membrane are close to neutral, and the ionic liquid added into a water-phase solution further improves the hydrophilicity of the surface of the membrane; the permeation flux and selectivity of the membrane can be effectively improved.

The invention relates to the technical field of polymer photoelectric materials, in particular to a preparation method of a supramolecular gel electrolyte. The method comprises the following steps: esterifying tetraphenylethylene alcohol and methacryloyl chloride to form tetraphenylethylene methacrylate, and performing staged linear heating polymerization on the tetraphenylethylene methacrylate, 3-(methacrylamido) propyl dimethyl 3-thiopropyl ammonium oxide inner salt, acrylic acid, tetraphenylethylene methacrylate and 4-vinylpyridine under the action of ammonium persulfate to obtain a tetraphenylethylene copolymer. And finally, soaking in a lithium chloride aqueous solution to obtain the supramolecular hydrogel electrolyte. The hydrogel obtained by the invention has high mechanical strength and high ionic conductivity, and is suitable for energy storage devices such as flexible supercapacitors and the like.

The invention relates to the technical field of gas separation membranes, in particular to a gas separation membrane based on a covalent organic framework and a preparation method and application thereof, and the preparation method comprises the following steps: preparing a mixed solution containing a polyamine monomer, a polyaldehyde monomer and an organic solvent, and reacting to obtain a COF material; the preparation method comprises the following steps: preparing an amine micromolecule aqueous solution, adding a COF material, and mixing until adsorption equilibrium to obtain NH2-COF; preparing a water-phase reaction solution containing NH2-COF and an organic-phase reaction solution containing multi-acyl chloride; the water-phase reaction liquid is in contact with the surface of the support membrane, and is in contact with the organic-phase reaction liquid after excess liquid is removed, and a nascent state COF membrane is obtained through reaction; and carrying out heat treatment on the nascent state COF membrane at 30-90 DEG C for 1-30 minutes to obtain the COF gas separation membrane. The gas separation membrane prepared by the invention can realize efficient separation of carbon dioxide / nitrogen and carbon dioxide / methane, and solves the problem of low selectivity of a COF membrane in separation of carbon dioxide / nitrogen and carbon dioxide / methane in the prior art.

The invention discloses a preparation method of a dotenorad key intermediate, and belongs to the technical field of compound synthesis. In the preparation method of the dotenorad key intermediate, provided by the invention, 2-aminothiophenol and formaldehyde are used as raw materials to carry out cyclization reaction to prepare a compound as shown in a formula 1, and then the compound as shown in the formula 1 and 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 According to the method, 3-(3, 5-dichloro-4-methoxybenzoyl chloride)-2, 3-dihydro-1, 3-benzothiazole is used as a raw material, an amidation reaction is carried out on 3, 5-dichloro-4-methoxybenzoyl chloride in an aqueous solution of an organic solvent, and the key intermediate 3-(3, 5-dichloro-4-methoxybenzoyl)-2, 3-dihydro-1, 3-benzothiazole of dotenorad can be effectively prepared; the obtained dotenorad key intermediate is relatively high in yield and purity; moreover, benzothiazoline which is widely used in the prior art does not need to be used in the preparation method, an activating agent or a solubilizer does not need to be used, the operation method is simple, reaction conditions are mild, and the method is suitable for actual industrial production.

The invention provides a preparation method of a quick-dissolution reverse osmosis basement membrane, the reverse osmosis basement membrane prepared by the preparation method and application, and relates to the technical field of reverse osmosis basement membrane preparation. The preparation method comprises the following steps: mixing a pre-casting membrane solution containing polysulfone and a solution containing an amphiphilic block copolymer to obtain a casting membrane solution; coating the surface of a base material with the casting film solution to obtain the base material with a wet film layer; immersing the base material with the wet film layer into a coagulating bath, and obtaining a base film with a modified polysulfone layer through a non-solvent induced phase transformation method; sequentially contacting the base membrane with the modified polysulfone layer with a water-phase monomer solution containing m-phenylenediamine and an oil-phase monomer solution containing trimesoyl chloride, and curing to form a polyamide layer, so as to obtain the reverse osmosis base membrane capable of being quickly dissolved out. The TOC dissolution amount of the reverse osmosis membrane material can be effectively reduced, the TOC dissolution process is accelerated, it is ensured that the membrane can rapidly reach the preset water quality standard in the initial use stage, and the performance stability of the membrane is improved.

The invention discloses a method for preparing a polyvinyl polyamide composite reverse osmosis membrane by coupling reversed-phase interfacial polymerization with lignosulfonate, which adopts a reversed-phase interfacial polymerization method and comprises the following steps: firstly adding an oil phase containing polyacyl chloride, and then adding a water phase containing amine monomers and lignosulfonate. Molecules of the lignosulfonate contain more sulfonate radicals, so that the lignosulfonate is endowed with hydrophilicity, meanwhile, a large number of active functional groups such as phenolic hydroxyl groups, alcoholic hydroxyl groups and carboxymethyl exist, and oxygen atoms, sulfur atoms and the like in the functional groups contain unbonded electron pairs and can participate in interfacial polymerization reaction to form a cross-linked structure; the trade-off effect of the flux and the rejection rate of the reverse osmosis membrane is broken, and the polyvinyl polyamide reverse osmosis membrane with high flux and high rejection rate is obtained. The raw material of the polyethylene base material is low in price, and the product can be applied to the fields of water treatment, seawater desalination, brackish water desalination and the like on a large scale.

The invention relates to an electromagnetic shielding resistant PPS alloy material containing modified carbon nanotubes, and belongs to the technical field of polymer composite materials. The PPS alloy material comprises 70-85 parts of polyphenylene sulfide, 5-15 parts of polyether-ether-ketone or a liquid crystal polymer, 3-8 parts of carbon nanotubes subjected to acyl chloride-amido double-step modification and 5-12 parts of carbon fibers subjected to oxidation treatment, and the carbon fibers subjected to oxidation treatment are covalently connected with the carbon nanotubes subjected to double-step modification. 0.5 to 1.5 parts of a coupling agent, 0.3 to 0.8 part of an antioxidant and 0.2 to 0.6 part of a lubricant. According to the invention, the carbon nanotubes are subjected to surface grafting group modification, and the carbon fibers are subjected to surface oxidation treatment, so that the technical problems that the carbon nanotubes are easy to agglomerate, the interface between the carbon fibers and the matrix is weak, and the shielding efficiency and the mechanical property are difficult to consider are solved, and the carbon nanotubes and the PPS matrix form a composite reinforced structure; the comprehensive improvement of the material in the aspects of electromagnetic shielding, mechanical property, thermal stability and the like is realized.