4465 results about "Acyl chloride" patented technology

The invention relates to the technical field of lithium ion battery diaphragm preparation, in particular to modified aramid diaphragm coating slurry, a battery diaphragm and a preparation method thereof.The preparation method of the modified aramid diaphragm coating slurry comprises the steps that under protection of inert gas, a cosolvent is dissolved into a polymerization solvent, and a solvent-cosolvent mixed system is obtained; adding p-phenylenediamine into the solvent-cosolvent mixed system, and dissolving to obtain a mixed solution; adding paraphthaloyl chloride into the mixed solution in batches, controlling the temperature of the system, and carrying out polymerization reaction, so as to obtain the modified aramid diaphragm coating slurry after the polymerization reaction is finished, in the preparation method, a third monomer is also added to participate in the polymerization reaction, and the third monomer is at least one of an amine third monomer and an acyl chloride third monomer. The modified aramid diaphragm coating slurry can be used for preparing a battery diaphragm with heat resistance and air permeability, and the process is simple.

The invention relates to the technical field of aramid fiber production, in particular to a heterocyclic aramid fiber liquid crystal spinning method which comprises the following steps: S1, preparation of heterocyclic aramid polymer powder: carrying out polymerization reaction on a diamine monomer, a third monomer and terephthaloyl chloride in a twin-screw polymerization reactor, after the reaction is finished, neutralizing with an alkaline substance, grinding, washing with water, and drying to obtain heterocyclic aramid polymer powder; s2, preparing the heterocyclic aramid fiber: dissolving the heterocyclic aramid polymer powder with concentrated sulfuric acid, filtering, defoaming to obtain a liquid crystal spinning solution, and performing a dry-jet wet-spinning process, namely spinning, solidifying and forming, washing with water, neutralizing, washing with water, drying and hot drafting to obtain the heterocyclic aramid fiber, a neutralizer used in the neutralization process in the step S2 is a weak base aqueous solution. The heterocyclic aramid fiber obtained by the spinning method has higher mechanical properties, few broken filaments and good flexibility, and can meet the application requirements of aerospace.

The invention provides a preparation method of a polyester loose nanofiltration membrane, and belongs to the technical field of nanofiltration membrane preparation. The preparation method provided by the invention comprises the following steps: dissolving a water-phase monomer in a sodium hydroxide solution to obtain a NaOH solution containing the water-phase monomer; soaking an ultrafiltration membrane in the NaOH solution containing the aqueous phase monomer to obtain an ultrafiltration membrane supporting layer; contacting the ultrafiltration membrane supporting layer with a trimesoyl chloride solution, and carrying out interfacial polymerization reaction to obtain a primary nanofiltration membrane; and carrying out heat treatment on the primary nanofiltration membrane to obtain the polyester loose nanofiltration membrane. The water-phase monomer is a compound which has a non-planar distorted structure and simultaneously contains phenolic hydroxyl groups and alcoholic hydroxyl groups. The method provided by the invention is simple and easy to implement, relatively low in required cost and beneficial to realizing large-scale industrial production of the high-efficiency nanofiltration membrane. The polyester loose nanofiltration membrane prepared by the preparation method disclosed by the invention has relatively high permeation flux, and meanwhile, a relatively high Na2SO4 retention rate can be kept.

The invention relates to the technical field of fibers, and discloses an ultrahigh-moisture-absorption anti-static polyester fiber and a preparation method thereof. The preparation method comprises the following steps: carrying out nucleophilic substitution reaction on 1, 2-benzisothiazolin-3-one and methacryloyl chloride to obtain modified benzisothiazolinone; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on phosphonitrilic chloride trimer and allylamine, and then carrying out nucleophilic substitution reaction on the phosphonitrilic chloride trimer and melamine again to obtain modified cyclophosphazene; the preparation method comprises the following steps: mixing gamma-methacryloxypropyltrimethoxysilane with aluminum zinc oxide for reaction, and mixing the obtained modified aluminum zinc oxide with modified benzisothiazolinone and modified cyclophosphazene for copolymerization in the presence of an initiator to obtain a flame-retardant antibacterial additive; mixing the flame-retardant antibacterial additive, calcium carbonate and polyethylene glycol terephthalate, performing melt spinning, and performing acid treatment to obtain modified polyester fibers; dipping the modified polyester fiber in a finishing liquid containing modified chitosan to obtain the ultrahigh-moisture-absorption anti-static polyester fiber.

The invention provides a novel method for synthesizing 1, 4-bis (4-fluorobenzoyl) benzene, which belongs to the technical field of aromatic halide production, and comprises the following steps: under inert gas, adding supported solid acid and fluorobenzene into a reaction container; the preparation method comprises the following steps: dropwise adding paraphthaloyl chloride into a reaction container, and reacting at 5-30 DEG C for 1-8 hours to obtain 1, 4-bis (4-fluorobenzoyl) benzene; carrying out purification treatment on the reaction system to obtain 1, 4-bis (4-fluorobenzoyl) benzene with the purity of 97.2% or above; the supported solid acid is composed of a carrier and Lewis acid; lewis acid is selected from any one of aluminum chloride, ferric chloride, titanium tetrachloride and zinc chloride; the carrier is selected from any one of an HY molecular sieve, an Hbeta molecular sieve, a ZSM-5 molecular sieve, acid-treated K10 montmorillonite, aluminum oxide and an MCM-41 molecular sieve. The reaction system condition is mild, the product purity is larger than or equal to 97.2%, after the condition is optimized, the purity is larger than 99.5%, the product and the catalyst can be separated through filtering, waste salt is avoided, the catalyst can be recycled, and the reaction is green and environmentally friendly.

The invention discloses a high-selectivity magnesium-lithium separation nanofiltration membrane based on a polyolefin base membrane and a preparation method and application of the high-selectivity magnesium-lithium separation nanofiltration membrane based on the polyolefin base membrane. The preparation method comprises the steps that the polyolefin base membrane is in single-face contact with an organic phase monomer solution containing an isophthaloyl chloride monomer or a paraphthaloyl chloride monomer, and the redundant solution is poured out; one side, contacted with the organic phase monomer solution, of the obtained membrane is contacted with a polyethyleneimine-containing aqueous phase monomer solution, an interfacial polymerization reaction is carried out, the obtained membrane is placed in a drying oven for heat treatment, then the membrane is soaked in an organic solution for activation, and the polyvinyl composite nanofiltration membrane is obtained. The nanofiltration membrane has high magnesium ion interception and high magnesium-lithium separation selectivity in a mixed solution with a high magnesium-lithium ratio, the preparation process is simple, conditions are mild, amplification and industrial production are easy to realize, and the nanofiltration membrane has good long-term operation stability.

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 belongs to the technical field of pyridone ethanolamine salt synthesis, and discloses an environment-friendly pyridone ethanolamine salt preparation process which comprises the following preparation steps: enabling isononanoyl chloride and 3, 3-methyl dimethacrylate to react under the catalysis of a solid acid catalyst to prepare 3, 7, 9, 9-tetramethyl-2-decene-5-keto acid methyl ester, and enabling the 3, 7, 9, 9-tetramethyl-2-decene-5-keto acid methyl ester to react under the catalysis of a solid acid catalyst to prepare 3, 7, 9, 9-tetramethyl-2-decene-5-keto acid methyl ester. The preparation method of the solid acid catalyst comprises the following steps: S1, taking water as a solvent, adding 14-16 parts by weight of zirconium oxychloride, 1-3 parts by weight of titanium sulfate, 0.1-0.5 part by weight of chloroplatinic acid and 0.05-0.4 part by weight of cerium chloride, adjusting the pH value to 10-11, and aging to obtain a precipitate; s2, roasting the precipitate obtained in the step S1 in an air atmosphere at 500-600 DEG C to obtain a solid acid catalyst; the method has the advantages that the catalyst is easy to recycle, and the reusability is high.

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 hydrophobic and oleophobic modified epoxy resin, which is prepared from the following components in parts by mass: 2 to 5 parts of thiolactone terminated fluorinated prepolymer, 15 to 16 parts of 4, 4 '-diaminodiphenylmethane, 0.13 to 0.14 part of base catalyst, 25 to 26.5 parts of epoxy resin and the balance of tetrahydrofuran solvent, wherein the thiolactone-terminated fluorinated prepolymer is prepared from thiolactone acrylamide, fluorinated acrylate and a photoinitiator in a mass ratio of (2-3): 1: (0.07-0.09) through a free radical polymerization copolymerization chemical reaction under the induction of ultraviolet light, and the thiolactone-terminated fluorinated prepolymer is obtained; wherein thiolactone acrylamide is prepared from DL-homocysteine thiolactone hydrochloride, a NaHCO3 solution and acryloyl chloride according to the mass ratio of 1: (1.3-1.5): (1.1-1.3), the oleophobic and hydrophobic modified epoxy resin provided by the invention effectively solves the problem that an epoxy resin coating in the prior art is poor in oleophobic performance and hydrophobic performance, and the oleophobic and hydrophobic modified epoxy resin has the advantages that the oleophobic and hydrophobic properties of the epoxy resin coating are improved; therefore, the oleophobic and hydrophobic properties of the epoxy resin coating are improved.

The invention discloses a preparation method and application of a ternary multifunctional three-dimensional framework mediated high ammonia nitrogen selectivity polyamide reverse osmosis membrane, and belongs to the technical field of membrane separation. The method comprises the following steps: 1, preparing a high-molecular copolymer; 2, preparing a polysulfone support layer by adopting a non-solvent induced phase inversion method; 3, preparing a polyamide reverse osmosis membrane by adopting an interfacial polymerization method; and 4, preparing the polyamide reverse osmosis membrane with high ammonia nitrogen selectivity. Through reasonable design of the structure and distribution of the group of the ternary multifunctional three-dimensional structure high-molecular copolymer, the copolymer can react with the acyl chloride group on the surface of the polyamide active layer to form a covalent amido bond, and the covalent amido bond is anchored on the surface of the polyamide layer in situ to construct the functional layer. The functional layer not only can significantly improve the surface potential of the membrane, but also can increase the inherent concentration of ammonia nitrogen on the surface of the membrane, thereby increasing the diffusion resistance, finally realizing the repulsive force to the ammonia nitrogen, and improving the interception capability of the grafted membrane to the ammonia nitrogen. The operation process is simple and mild, the whole membrane preparation process is not changed, and industrialization is easy.

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 invention relates to the technical field of nylon 6, and discloses a carbon nanotube grafted ABS modified nylon 6 composite material, acylating chlorinated carbon nanotubes and lysine are subjected to an amidation reaction, double bonds on ABS and double bonds on maleic anhydride are combined, anhydride modified ABS and amino modified carbon nanotubes are subjected to a ring-opening reaction, and the carbon nanotube grafted ABS modified nylon 6 composite material is obtained. The carbon nanotubes are grafted to the ABS, agglomeration of the carbon nanotubes is avoided, the carbon nanotubes can form a uniform network structure under the action of external force, a large amount of external force is absorbed, the toughness of a matrix is improved, a large amount of carboxyl introduced to the surface of the ABS plastic and amide groups in the nylon 6 matrix are subjected to hydrogen-bond interaction, a three-dimensional hydrogen-bond network is formed, and the toughness of the matrix is improved. According to the present invention, the compatibility and the interfacial force between the nylon 6 and the carbon nano-tube grafted ABS are improved, such that the nylon 6 and the carbon nano-tube grafted ABS can be uniformly distributed so as to form the sea island structure, and can buffer more stress effects under the action of the external force, such that the obtained composite material has excellent toughness.

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 present invention relates to the technical field of nanofiltration membranes, and particularly relates to a preparation method for a positively charged nanofiltration membrane for improving a "trade-off" effect. The preparation method comprises the following process: sequentially adding a water phase and an oil phase to the surface of a support layer to perform a reaction, so as to prepare a polyamide layer; pouring in a functionalized graphene dispersion; and sequentially placing same into an N,N-dimethyl propane diamine solution, a sodium borohydride solution and an iodomethane solution to perform a reaction, so as to obtain a nanofiltration membrane, wherein the functionalized graphene is pyrrolidone-based graphene. According to the present invention, a mixture of piperazine and polyethyleneimine is used as a water phase and is subjected to interfacial polymerization with an oil phase 1,3,5-trimesoyl chloride on the surface of the support membrane; and by means of the compounding of micromolecular piperazine and macromolecular polyethyleneimine, the rapid formation of a polyamide layer is promoted, the distance of a system cross-linked network is increased, a positively charged polyamide layer having a large pore diameter and good hydrophilicity is formed, and a good water flux and a good rejection rate are achieved, thereby improving the "trade-off" effect.

The invention discloses a thiazolinone acrylic acid silane ester self-polishing antifouling resin and a preparation method and application of the thiazolinone acrylic acid silane ester self-polishing antifouling resin. The preparation method of the thiazolinone acrylic acid silane ester self-polishing antifouling resin mainly comprises the following steps: in a nitrogen environment, adding an initiator, the preparation method comprises the following steps: carrying out random free radical polymerization reaction on thiazolinone methacrylate, methyl methacrylate, ethyl acrylate, triisopropyl silicon-based methacrylate and phenyl dimethyl silicon-based methacrylate by taking azodiisobutyronitrile and benzoyl peroxide as initiators to synthesize the photoinitiator. Wherein the thiazolinone methacrylate monomer is prepared by grafting double bonds on 5-chloro-2-benzothiazolinone and methacryloyl chloride through a substitution reaction, then grafting hydroxyl on the 5-chloro-2-benzothiazolinone and mercaptoethanol through a mercapto-alkene click reaction and finally carrying out a substitution reaction on the 5-chloro-2-benzothiazolinone and methacryloyl chloride. According to the invention, the coating still has good surface self-renewal capability even in a static environment so as to inhibit the adhesion of large fouling organisms.

The invention discloses a triazine biphenyl compound, a composition, a cured product as well as a preparation method and application of the triazine biphenyl compound, the composition and the cured product. The compound is phenolic resin with a triazine biphenyl structure obtained through condensation polymerization of p-cyanobiphenol; the phenolic resin respectively reacts with an epichlorohydrin compound and an acyl chloride compound to obtain epoxy resin and active ester with a triazine biphenyl structure, and the epoxy resin and the active ester can be self-cured or cured under the action of an imidazole accelerator; in the preparation process, triazine ring (containing nitrogen) is introduced as a node, trifunctional epoxy resin with a rigid aromatic structure as an arm and an active ester curing agent (the same skeleton) are prepared into a thermosetting cross-linked network by adopting a non-polar cross-linking scheme, and a three-dimensional network intrinsic microporous structure is formed through in-situ cross-linking regulation and control of a rigid long-arm branched unit. Further, the bottlenecks of low dielectric property, high temperature resistance, flame retardance and the like are broken through, and the cured material has the characteristics of excellent flame retardance, high temperature resistance and low dielectric property.

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 discloses an antistatic PPO material based on graphene and a preparation method thereof.The preparation method comprises the steps that aminated polyphenyl ether and modified filler react to prepare modified polyphenyl ether, the modified polyphenyl ether is treated with benzenesulfonyl chloride to prepare the antistatic PPO material, when the aminated polyphenyl ether and the modified filler are used, the modified filler is equivalent to a cross-linking agent, and when the modified filler is used for modifying the aminated polyphenyl ether, the modified filler is equivalent to a cross-linking agent; the modified filler is interspersed among the molecular chain segments, graphene is arranged in the modified filler and has a very good conductive effect, so that the material has an antistatic effect, and the surface of the modified filler contains an organic silicon chain segment, so that the antistatic property of the material is improved; when the material is combusted, a phosphorus-containing organic silicon chain segment on the surface of the modified filler can form a P-O-Si compact carbon layer, a nitrogen element on a side chain can generate amino free radicals, then active hydrogen atoms and hydroxyl free radicals are captured, a combustion chain reaction is interrupted, a sulfur element can release sulfur dioxide gas, the oxygen concentration is further diluted, and the oxygen concentration is reduced. Therefore, the material has a good flame-retardant effect.

The invention belongs to the technical field of organic chemical synthesis, and particularly relates to a gentiopicroside amide derivative, a synthesis method and application. A series of gentiopicroside amide derivatives are synthesized by taking gentiopicroside as a research object, carrying out structural modification on 6 '-site hydroxyl of gentiopicroside and introducing a benzoyl chloride group into a gentiopicroside structure. The synthetic method has the beneficial effects that on one hand, the synthetic method of the gentiopicroside amide derivative, which is mild in reaction condition and environment-friendly, is established; on the other hand, the 20 synthesized gentiopicroside amide derivatives have a remarkable inhibition effect on expression of LPS-induced THP-1 macrophage IL-6 and STAT3 protein content, the anti-inflammatory activity is remarkable, the action effect is superior to that of parent compound gentiopicroside, and a new thought is provided for preparation of STAT3 small-molecule inhibitors and anti-inflammatory drugs.

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 technical field of dye separation, and discloses a loose nanofiltration membrane and a preparation method and application thereof.The loose nanofiltration membrane is prepared from a multi-acyl chloride organic solution and an amine monomer water-phase solution on the surface of a porous supporting membrane through a one-step interfacial polymerization method, and the rejection rate of the loose nanofiltration membrane to methyl blue, Congo red and other dyes is 95% or above; meanwhile, the loose nanofiltration membrane has high water permeability and excellent dye / inorganic salt separation selectivity, and is expected to have wide application prospects in the fields of dye production and purification and dye wastewater desalination.

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 relates to the technical field of high polymer materials, in particular to a block copolymerization modified para-aramid polymerization solution and a preparation method and application thereof.The preparation method comprises the steps that in the inert gas atmosphere, hydrotropy salt is dissolved in an organic solvent to obtain the polymerization solution; adding a third monomer and terephthaloyl chloride into the polymerization solution, and controlling the reaction temperature to carry out pre-polycondensation reaction to obtain an amino-terminated oligomer system; adding p-phenylenediamine and paraphthaloyl chloride into the oligomer system, and controlling the stirring reaction temperature to carry out block copolymerization reaction under the stirring condition; and after the block copolymerization reaction is finished, adding a neutralizer to neutralize acidic substances generated in the reaction process, and finally obtaining the modified para-aramid polymer liquid in the neutral environment. The polymer liquid is applied to the field of lithium battery diaphragms, and the modified aramid fiber coated diaphragm which is excellent in thermal shrinkage performance, high in diaphragm rupture temperature, porous in structure and high in puncture resistance is obtained.