604 results about "Polyoxymethylene" patented technology

The invention relates to the technical field of plastic cups, in particular to a transparent polypropylene medical plastic cup and a preparation method thereof. The plastic cup comprises the following components in parts by weight: 60-80 parts of polypropylene, 3-8 parts of polyformaldehyde, 5-15 parts of modified nano calcium carbonate, 3-5 parts of kaolin, 2-4 parts of talcum powder, 0.2-0.4 part of a nucleating agent, 0.5-1.5 parts of a lubricant, 1-3 parts of an antioxidant and 0.5-1.0 part of a stabilizer. The preparation method comprises the following steps: uniformly stirring polypropylene, polyformaldehyde, modified nano calcium carbonate, kaolin, talcum powder, a nucleating agent, a lubricant, an antioxidant and a stabilizer to obtain a mixture; the mixture is subjected to melt extrusion, granulation and injection molding to obtain the plastic cup, and the plastic cup not only has excellent mechanical properties, but also has excellent antibacterial properties, and can effectively prevent growth of bacteria.

The invention relates to a preparation method of a geopolymer composite material based on modified fiber, which comprises the following steps: S1, fiber pretreatment: the fiber is one of basalt fiber and polyformaldehyde fiber; s2, performing surface roughening treatment on the fibers through a polyvinyl alcohol modified impregnating compound to obtain roughened fibers; s3, the roughened fibers are subjected to surface functional modification treatment through a functional modified impregnating compound, and functional modified fibers are prepared; s4, uniformly mixing the powder and an expanding agent according to a mass ratio, and adding an alkali activator solution and the functional modified fibers to prepare a geopolymer gel material; s5, the geopolymer gel material is subjected to stirring, mold filling, steam curing forming, demolding and continuous curing, and the geopolymer composite material based on the modified fiber is obtained.According to the preparation method, the geopolymer composite material with high strength and excellent crack resistance and toughness is obtained through alkali excitation, and the problems that geopolymers are low in toughness and large in brittleness are effectively solved.

The invention provides slick water fracturing fluid as well as a preparation method and application thereof. The slick water fracturing fluid comprises chitosan, a polymer matrix, paraformaldehyde and a solvent. In the slick water fracturing fluid provided by the invention, the chitosan and the polymer are fully dissolved, and the main chains of the two polymers are physically interpenetrated and wound. In the presence of paraformaldehyde, a polymer main chain is chemically crosslinked with paraformaldehyde to form a primary network structure. Then, chitosan and molybdenum disulfide can form coordination cross-linking sites, a secondary network structure is obtained, then a multi-network structure which cannot be split is formed, and the viscosity is high; moreover, the components have good solubility in the solvent, are easy to mix on line and are relatively low in preparation cost.

In order to solve the problems of low yield, complex process and difficulty in purification in the existing preparation method of benzodifurandione, the invention provides a preparation method of benzodifurandione, which comprises the following operation steps: synthesis of benzodifurandione: mixing hydroquinone, paraformaldehyde, a transition metal catalyst and a ligand under an acidic condition to obtain a mixture A; introducing CO, reacting at the temperature of 120-150 DEG C to obtain a mixture containing benzodifuran diketone, cooling and filtering to obtain a benzodifuran diketone solid; and purification: purifying the benzodifuran diketone solid to obtain the benzodifuran diketone. The preparation method provided by the invention is simple and convenient to operate, the obtained monomer benzodifuran diketone raw material is high in purity and stable in quality, and large-scale production of polymers can be realized.

The invention relates to the technical field of wastewater treatment, in particular to an intelligent wastewater recovery and zero discharge control system, which is suitable for efficient separation and resource utilization of high TDS (total dissolved solids) and high COD (chemical oxygen demand) wastewater, and realizes intelligent control and resource utilization of a wastewater treatment process by combining a dynamic Bayesian network and a deep reinforcement learning algorithm. According to the system, wastewater with high TDS (Total Dissolved Solid Concentration) and high COD (Chemical Oxygen Demand) is treated by monitoring wastewater characteristics in real time, dynamically optimizing operation parameters and adopting a cross-flow PON (Passive Optical Network) pollution-resistant design and a POM (Polyoxymethylene) wide flow channel design, so that the aims of efficient separation, deep concentration and zero emission are fulfilled.

The invention relates to the technical field of metal powder injection molding, in particular to an MIM titanium alloy binder and application of the MIM titanium alloy binder to preparation of high-plasticity TC4 parts. The MIM titanium alloy binder comprises polyformaldehyde, aluminum stearate, polyethylene, queen bee wax and high-density polyethylene. According to the MIM titanium alloy binder, polyformaldehyde serves as a main component, high-melting-point bee wax and aluminum stearate are introduced, the bee wax can improve the thermal stability of a lubricant, aluminum stearate can inhibit volatilization of Al element, the rheological property and sintering behavior of feeding are remarkably optimized, the number of titanium alloy feeding cycles and the density after sintering can be increased, and the O content can be reduced.

The invention discloses an injection molding high-density alloy steel sintering integrated preparation process, which comprises the steps of alloy raw material proportioning, feed preparation, injection molding, continuous thermal desorption sintering treatment and enhanced heat treatment, and comprises the following steps: selecting gas atomization pure iron powder subjected to vacuum reduction treatment, and matching with chromium, nickel, molybdenum, vanadium, carbon, silicon, manganese and iron powder multi-component alloy proportioning; a phenolic resin-polyformaldehyde composite binder is adopted, 0.5-1.5% of a lubricating additive is added, internal mixing parameters are controlled under the protection of inert gas according to the powder-to-rubber ratio of 72-77%: 23-28%, and the problem that the compatibility of a single binder and alloy powder is poor is solved; three-section gradient temperature control injection molding and a continuous atmosphere furnace sectional degreasing-sintering integrated process are combined, and strengthening heat treatment is matched, so that sufficient diffusion of elements and densification of a green body are realized, and defects are avoided. The technology effectively solves the technical problems that traditional raw materials are high in impurity content and insufficient in element diffusion, and therefore the alloy steel sintering preparation efficiency can be improved.

The invention relates to the technical field of polyurethane coatings, and discloses a preparation method of an antibacterial wear-resistant waterborne polyurethane coating, which comprises the following steps: taking concentrated hydrochloric acid, p-phenylenediamine, sodium nitrite, paraformaldehyde, amino-modified nano silicon dioxide and hexamethylene diisocyanate as raw materials; the preparation method comprises the following steps: taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide as a raw material, carrying out diazotization coupling reaction, substitution reaction, Mannich reaction and addition reaction to prepare modified polyisocyanate, then taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and ((2-aminoethyl) azadiyl) dimethanol as raw materials, carrying out substitution reaction to prepare DOPO-based dihydric alcohol, and carrying out reaction to prepare the DOPO-based dihydric alcohol. Finally, the modified polyisocyanate, DOPO-based dihydric alcohol and polyethylene glycol 400 are used as raw materials, an antibacterial wear-resistant polyurethane emulsion is prepared through a prepolymerization reaction and a chain extension reaction, and the prepared polyurethane coating has good antibacterial, anti-ultraviolet, flame-retardant and wear-resistant properties.

The invention relates to a high-temperature-resistant low-dielectric high-strength benzoxazine intermediate and a preparation method of benzoxazine, and belongs to the field of functional polymer materials. The method comprises the following steps: adding paraformaldehyde, unsaturated bond-containing dihydric phenol, a monohydric phenol compound and a diamine compound into a reactor, adding a solvent, reacting at 85-110 DEG C for 8-12 hours, after the reaction is finished, obtaining a benzoxazine intermediate through a purification process, and fully drying the benzoxazine intermediate for later use; and reacting the benzoxazine intermediate at 120-230 DEG C for 8-20 hours to obtain the polybenzoxazine resin.

The invention discloses a marine environment integrated sensing function net system and a preparation method thereof, a net body is made of antibacterial polyformaldehyde / ultra-high molecular weight polyethylene bi-component composite fibers, and the antibacterial polyformaldehyde / ultra-high molecular weight polyethylene bi-component composite fibers have the characteristics of high strength, corrosion resistance, wear resistance, self-lubrication, biological adhesion resistance, weather resistance and the like, and are suitable for long-term marine deployment. Optical fiber sensing fibers containing single-mode distributed sensing optical fibers, a polytetrafluoroethylene sleeving and packaging layer and a stainless steel alloy wire woven protection layer are integrated in the net, and various sensing fibers such as basalt fiber base, carbon fiber base, carbon nanofiber base and polysulfonamide fiber base are converted into sensing fibers through an integrated sensor, so that a dual-channel multi-parameter sensing system is formed. And various ocean parameters such as temperature, pressure, water quality and biological activity can be monitored, and ocean water quality and biological activity can be accurately mastered. And the stability and reliability of the sensor are ensured through the protection layer. The preparation method ensures the stability of the net body structure and the accuracy of the sensing function. The network not only can stably operate in a marine environment, but also can provide accurate sensing data, and provides powerful support for marine research and monitoring.

The invention relates to the technical field of flame retardants, and discloses a halogen-free flame retardant, a preparation method and application of the halogen-free flame retardant in plastics. The preparation method comprises the following steps: synthesizing modified DOPO by taking DOPO, p-hydroxybenzaldehyde and phenol as raw materials, and mixing the modified DOPO with propargylamine and paraformaldehyde for reaction to obtain dialkynyl benzoxazine; the preparation method comprises the following steps: grafting dialkynyl benzoxazine and 1-azido adamantane through a click chemical reaction to obtain flame-retardant benzoxazine; the halogen-free flame retardant is obtained by carrying out in-situ polymerization on flame-retardant benzoxazine on the surface of the ammonium polyphosphate / molecular sieve composite material. The halogen-free flame retardant is excellent in flame retardant effect and good in compatibility in a matrix material, can effectively improve the flame retardant property and the mechanical property of the matrix material, and can be applied to plastic materials.

The present invention relates to the technical field of benzoxazine resins, and discloses a halogen-free copper-clad laminate substrate material containing flame-retardant modified benzoxazine resin and a preparation method thereof, wherein the present invention utilizes 1,2,4,5-benzenetetramine and phosphorus oxychloride to carry out chlorination reaction to obtain intermediate product 1, and then it is subjected to substitution reaction with p-hydroxybenzaldehyde to obtain intermediate product 2, and the aldehyde group contained therein is subjected to Schiff base reaction with 3-aminophenoxyphthalonitrile to obtain intermediate product 3, and under the catalytic reduction of Raney nickel, phosphorus-containing polyamine is obtained, and finally it is subjected to Manniene reaction with bisphenol A and polyformaldehyde to obtain a flame-retardant modified hyperbranched benzoxazine resin, and finally it is stirred and mixed evenly with E-51 epoxy resin, N, N-dimethylbenzylamine, etc., and coated on glass fiber cloth, and cured to obtain a halogen-free copper-clad laminate substrate material containing flame-retardant modified benzoxazine resin. The halogen-free copper-clad laminate substrate material prepared by the present invention has good flame retardancy, thermal stability and mechanical properties.

The invention relates to the field of fuel, and discloses a fuel composition and application thereof. The fuel composition comprises a basic fuel and functional fuel addition components, the functional fuel addition components comprise polyoxymethylene dialkyl ether, hydrocarbon, a cetane number enhancer and a lubricant, the hydrocarbon is polycyclic hydrocarbon fuel and / or polycyclic hydrocarbon fuel, and the cetane number enhancer is polycyclic hydrocarbon fuel and / or polycyclic hydrocarbon fuel. The lubricant is selected from dibasic acid monoester compounds and fatty acid and / or fatty acid polyol ester; based on the total mass of the functional fuel additive components, the content of the polyoxymethylene dialkyl ether is 1-70% by mass, the content of the hydrocarbon is 15-90% by mass, the content of the cetane number enhancer is 0.005-10% by mass, and the content of the lubricant is 0.001-5% by mass. The composition is suitable for making up the deficiency of polyoxymethylene dimethyl ethers in plateau areas and improving the power and power performance of fuel engines.

The invention discloses a method for preparing a high-precision aluminum alloy part based on injection molding, which is characterized in that a modifier is added into a polyformaldehyde (POM)-based binder, so that the compatibility of the polyformaldehyde (POM)-based binder and aluminum alloy powder can be effectively improved, and after the polyformaldehyde (POM)-based binder is mixed with the aluminum alloy powder, the powder distribution is more uniform, and the strength of the aluminum alloy part is improved. The compactness and the structural strength of the injection molding aluminum alloy part are further improved; by adding ethylene bis stearamide, polyesteramide and stearic acid, the interface relationship between the powder and the binder can be improved, intermolecular or intramolecular interaction between the powder and the binder is promoted, the compatibility between the powder and the binder is improved, gaps are fully filled with the binder, the powder is wrapped with the binder, the friction force between the powder is remarkably reduced, and the service life of the binder is prolonged. Further, the viscosity of the whole feed is reduced; the raw materials with the double-peak granularity have higher flowability, the powder and the binder are uniformly distributed, and the material is more suitable for mold filling.

The invention discloses an application of an ionic liquid in extraction of trioxymethylene, in the process of generating trioxymethylene by acid-catalyzed condensation of a formaldehyde aqueous solution, the ionic liquid is added as an extraction agent to extract and separate the trioxymethylene generated by reaction, and the ionic liquid is methyl tributyl phosphonium bis (trifluoromethanesulfonyl) imide salt; when the ionic liquid is used for extracting trioxymethylene, a ternary azeotropic system of trioxymethylene, water and methylene glycol can be broken, the ionic liquid and trioxymethylene are subjected to nonpolar Van der Waals' force interaction so as to realize extraction, and methylene glycol and water are left in a water phase through hydrogen-bond interaction, so that high-purity trioxymethylene with the purity of more than or equal to 99.5 wt.% is obtained.

The invention discloses piperonyl butoxide and a preparation method thereof. The preparation method comprises the following steps: carrying out mixing reaction on dihydrosassafras oil, acetyl chloride and trioxymethylene in the presence of concentrated hydrochloric acid; after the reaction is finished, chloromethyl material reaction liquid is obtained; mixing and reacting the chloromethyl material reaction liquid with sodium hydroxide and diethylene glycol monobutyl ether to obtain a product containing piperonyl butoxide. According to the preparation method of piperonyl butoxide, the dihydrosassafras oil, acetyl chloride and trioxymethylene are subjected to chloromethylation reaction in the presence of a small amount of concentrated hydrochloric acid, so that the use of a large amount of concentrated hydrochloric acid in the traditional process is avoided, and the problem of waste acid generated in the chloromethylation reaction process is solved; and meanwhile, the content of piperonyl butoxide in the product can be increased, and the content of piperonyl butoxide is ensured to be greater than 98%.

The invention discloses a triazine desulfurizer and a preparation method thereof, and belongs to the technical field of gas purification. The triazine desulfurizer is mainly prepared from the following raw materials in percentage by weight: 20 to 50 weight percent of triazine derivative, 10 to 15 weight percent of sterically hindered amine, 3 to 7 weight percent of stabilizer, 1 to 3 weight percent of synergist, 0.5 to 1.5 weight percent of penetrant, 0.5 to 1.5 weight percent of inhibitor, 1 to 2 weight percent of additive and the balance of water, the preparation method of the triazine derivative comprises the following steps: adding 2-(diphenylphosphino) ethylamine into a toluene solvent, adding a paraformaldehyde aqueous solution in batches under a stirring condition, and reacting for 2-8 hours to obtain the triazine derivative. According to the triazine desulfurizer and the preparation method thereof provided by the invention, the triazine derivative and the sterically hindered amine are taken as a host, and the stabilizer, the synergist, the penetrant, the inhibitor and the assistant are compounded, so that the scaling trend of the triazine desulfurizer in an oil and gas well can be slowed down, the dissolution rate of hydrogen sulfide and the mass transfer rate in a solution are increased, and the desulfurization reaction is promoted; the desulfurization effect and the desulfurization rate are improved, and meanwhile, a very good scale inhibition effect is also achieved.

The invention discloses a method for synthesizing 2-vinylpyridine by a one-pot method, which comprises the following step: by taking 2-methylpyridine and paraformaldehyde as raw materials and water as a solvent, synthesizing the 2-vinylpyridine by a one-pot reaction under the catalysis of a basic catalyst. According to the invention, 2-methylpyridine and paraformaldehyde are taken as initial raw materials, the raw materials are simple and easy to obtain, the production cost is reduced, and water is taken as a solvent, so that the use of a large amount of organic solvents is avoided, and the influence on environmental pollution is small. In the reaction, a basic catalyst such as triethylamine is used as a catalyst, a small amount of sodium hydroxide solid is added in the reaction process, the basic catalyst enables the whole system to be in an alkaline environment, and sodium hydroxide improves the depolymerization efficiency of paraformaldehyde and promotes the dehydration process of the reaction, so that the selectivity and yield of 2-vinylpyridine are improved.

The invention discloses a preparation method of an intrinsically flame-retardant and toughened polystyrene copolymer. The preparation method comprises the following steps: firstly, preparing a phosphorus-nitrogen integrated functional compound from glycine, paraformaldehyde and dimethyl phosphite as raw materials; then carrying out acylating chlorination modification on the phosphorus-nitrogen integrated functional compound by using thionyl chloride; reacting the phosphorus-nitrogen integrated functional compound modified by acylating chlorination with phenolic hydroxyl cardanol to prepare a high-flexibility flame-retardant monomer; and finally, reacting the high-flexibility flame-retardant monomer with styrene to obtain the polystyrene copolymer. The copolymer has the dual advantages of flame retardance and toughening at the same time.

The invention discloses a strong acid and alkali resistant plastic material for fume hood surface decoration and a preparation method of the strong acid and alkali resistant plastic material, belongs to the technical field of plastic material processing, and aims at solving the technical problem that in the prior art, the acid and alkali resistance and the bending modulus of a plastic material for fume hood surface decoration need to be further improved. The preparation method specifically comprises the following steps: stirring amino-modified fluorosilicone resin, paraformaldehyde and 1, 4-dioxane in a reaction kettle, dropwise adding an anacardol solution, heating the reaction kettle to 85-95 DEG C, carrying out heat preservation reaction for 6-8 hours, and carrying out post-treatment to obtain the anacardol-based benzoxazine resin. Perfluoro-modified polysiloxane benzoxazine is prepared, naphthalene-containing epoxy resin and imidazole-modified silicon carbide microspheres are compounded, in-situ catalysis synergistic curing is carried out by using filler interface imidazole, a compact organic-inorganic hybrid interpenetrating network is constructed, and the strong acid and alkali corrosion resistance and bending modulus of the material are remarkably improved.

To provide a resin retainer that undergoes little dimensional change and does not hinder assembly work of rolling elements.SOLUTION: In a resin retainer 1 for a rolling bearing, a ratio of dimensional change is less than 0.16%, and polyacetal (POM) is a preferable form of the resin. A rolling bearing is provided with the resin retainer 1 for the rolling bearing, and is suitable for use as a speed reduction mechanism used in a joint portion of a robot arm.SELECTED DRAWING: Figure 1

A BDO process wastewater treatment process comprises the steps that BDO wastewater, diluted phenol water and part of polyformaldehyde wastewater are received by a phenol recycling and regulating tank and are preliminarily separated and recycled, the polyformaldehyde wastewater receiving ratio of the phenol recycling and regulating tank to a mixed wastewater tank is 1: 1, and the total wastewater receiving ratio of the phenol recycling and regulating tank to the mixed wastewater tank is 8.5: 0.5. According to the invention, the polyformaldehyde wastewater is partially introduced into the mixed wastewater pool to reduce the sludge load of the IMC pool, the formaldehyde concentration of the polyformaldehyde wastewater is diluted by using low-concentration wastewater such as domestic sewage, ground flushing water, rainwater and the like entering the mixed wastewater pool, and 1, 4-butanediol production wastewater and polyformaldehyde production wastewater do not need to be independently treated, so that the treatment cost is reduced. The wastewater can be treated together with phenol-containing wastewater generated by gasification by a traditional biological method, so that the phenol-containing wastewater of a phenol recovery device, formaldehyde-containing wastewater of a 1, 4 butanediol device, formaldehyde-containing wastewater of a polyformaldehyde device and TOX wastewater can be treated by a sewage treatment station, a sewage system operates stably, and the wastewater reaches the standard and is discharged.

The invention belongs to the technical field of metal materials, and particularly relates to a high-strength decorative aluminum product metal material and a preparation method thereof. The preparation method of the high-strength decorative aluminum product metal material comprises the following steps: (1) adding carbon nano onions, sulfuric acid and oxalic acid into water to prepare a mixed acid solution, immersing an aluminum matrix into the mixed acid solution for anodic oxidation, and then cleaning and drying to prepare a pretreated aluminum matrix; and (2) polyformaldehyde fibers are added into the dispersion liquid, a heating reaction is conducted, a mixed solution is obtained, the surface of a pretreated aluminum matrix is coated with the mixed solution, then heat treatment is conducted, after aging is conducted at the room temperature, cleaning and drying are conducted, and the high-strength decorative aluminum product metal material is obtained. The preparation process is simple, the product performance is stable, and the product has the properties of high strength, high hardness, wear resistance, super-hydrophobicity, self-cleaning and the like.

The invention relates to the technical field of polyurethane, and discloses a high-strength impact-resistant TPU composite material and a preparation method, the high-strength impact-resistant TPU composite material comprises 60-85 parts by weight of polyurethane resin, 15-40 parts by weight of polyformaldehyde, and 1-4 parts by weight of hydroxyl polyurethane; the hydroxyl polyurethane is similar to a molecular main chain of polyurethane resin, a side chain contains hydroxyl, and the hydroxyl polyurethane and an ether bond of polyformaldehyde are subjected to hydrogen-bond interaction, so that the hydroxyl polyurethane plays a role in compatibilizing the polyurethane resin and the polyformaldehyde, the compatibility between the polyurethane resin and the polyformaldehyde is remarkably improved, and an alloy system with better mechanical properties is formed; the TPU composite material has higher tensile strength and keeps good impact strength; hydroxyl polyurethane contains a fused ring structure with high-temperature resistance and is not prone to thermal decomposition, the heat resistance of the TPU composite material is improved, and the initial thermal decomposition temperature is increased.

The invention provides a binder system for beryllium-titanium alloy powder injection molding and application, and relates to the technical field of metal powder injection molding. The adhesive system consists of the following components in percentage by weight: 76 to 84 percent of polyformaldehyde, 7 to 9 percent of high-density polyethylene, 5 to 7 percent of ethylene-vinyl acetate copolymer, 3 to 5 percent of paraffin, 0.1 to 0.5 percent of stearic acid, 0.1 to 1.5 percent of polyethylene glycol and 0.1 to 1 percent of BASF antioxidant. The feed preparation method based on the system comprises the steps of powder pretreatment, binder preparation, banburying mixing and cooling granulation, and uniform coating and dispersion of beryllium-titanium powder can be achieved. According to the system, the problems that in beryllium-titanium alloy injection molding, powder is prone to oxidation, poor in fluidity and low in size precision are solved, the viscosity of the prepared feed at 180 DEG C is 88-101 Pa.S, and the oxygen content is smaller than or equal to 0.24 wt%; the relative density of a finished product is larger than or equal to 96.5%, the size precision is + / -1% / in-+ / -2% / in, and the method is suitable for industrial production of beryllium-titanium alloy complex parts in the fields of spaceflight and nuclear energy.

The invention provides a composite solid electrolyte, a preparation method thereof and a battery, the composite solid electrolyte comprises a lithium salt, polyformaldehyde, a plasticizer and an inorganic filler, and the mass ratio of the plasticizer to the polyformaldehyde is 1: 50-1: 4. When the plasticizer accounts for a relatively small amount, crystallization of polyformaldehyde cannot be effectively inhibited, and the ionic conductivity of the composite solid electrolyte is relatively low; and when the plasticizer accounts for a large amount, the mechanical property of the electrolyte is poor. Therefore, the ionic conductivity of the polyformaldehyde-based electrolyte can be improved by a proper amount of plasticizer, and meanwhile, the electrolyte keeps good mechanical properties. The room-temperature ionic conductivity of the polyformaldehyde-based composite solid electrolyte provided by the invention can reach 1.43 mS / cm.

The invention relates to the technical field of electrochemistry, in particular to a polymer composite film, a composite current collector and a preparation method thereof, a positive electrode and application thereof. The polymer composite film comprises a polymer base layer, and a first modified layer and a second modified layer which are respectively arranged on two opposite side surfaces of the polymer base layer, the material of the polymer base layer comprises one or more of polyethylene glycol terephthalate, poly (1, 4-cyclohexylenedimethylene terephthalate) and polyethylene glycol terephthalate-1, 4-cyclohexylenedimethylene terephthalate; the first modified layer and the second modified layer respectively and independently comprise the following components: a functional polymer material; the functional polymer material comprises one or more of polyethylene naphthalate, polyadipyl metaphenylene diamine, a liquid crystal polymer, polyformaldehyde, polyphenylene sulfide and polyphenyl ether. The polymer composite membrane disclosed by the invention can be effectively broken when being damaged by relatively strong external force, so that thermal runaway of the battery can be effectively prevented.

The invention relates to the technical field of organic synthesis, in particular to a method for continuously synthesizing a pyroxasulfone intermediate, which at least comprises the following steps: mixing polyformaldehyde and a compound I to prepare a solution A, respectively introducing the solution A and sulfonyl chloride into a micro-channel reactor for chloromethylation reaction, and after the reaction is finished, carrying out post-treatment to obtain the pyroxasulfone intermediate. The compound I is 1-methyl-3-trifluoromethyl-5-difluoromethoxy-1-H-pyrazole, and the compound II is a compound III. The pyroxasulfone intermediate is 1-methyl-3-trifluoromethyl-4-chloromethyl-5-difluoromethoxy-1-H-pyrazole, and the structural formula of the pyroxasulfone intermediate is shown in the description. By adopting the microchannel reactor, mass transfer between two-phase fluids can be enhanced, rapid and sufficient mixing of two strands of materials is realized, so that the reaction process is enhanced, the flow rate, the reaction temperature, the reaction time, the pressure and the like are controlled for reaction, and the method has the characteristics of high purity, high yield, simple synthesis process, no pollution and easy treatment of three wastes, and is suitable for industrial production. The industrial application is facilitated.

The invention discloses a method for synthesizing loxoprofen sodium by using a resin catalyst, and belongs to the field of medical chemical synthesis. The preparation method comprises the following steps: synthesizing 2-methylene cyclopentanone through methylenation reaction of cyclopentanone, paraformaldehyde and amine; the preparation method comprises the following steps: reacting 4-halogenated phenylacetate with methyl iodide to synthesize 2-(4-halogenated phenyl) propionate; a target intermediate 2-(4-((5-oxocyclopentyl-1-alkenyl) methyl) phenyl) propionate is generated through a Heck coupling reaction; further reducing to 2-(4-((2-oxygen cyclopentyl) methyl) phenyl) propionate through a catalytic hydrogenation reaction; and finally, carrying out a salt forming reaction to obtain loxoprofen sodium. The method adopts the self-made resin catalyst, is efficient and environment-friendly, has good yield and purity, and is suitable for industrial production.

The invention discloses a phosphorus-nitrogen synergistic flame-retardant benzoxazine / epoxy resin composite material and a preparation method thereof. Firstly, a phenolic compound and DOPO react to generate an intermediate product, and then the intermediate product, an amine compound and paraformaldehyde are subjected to a dehydration condensation reaction to generate the phosphorus-nitrogen synergistic flame retardant benzoxazine. The phosphorus-nitrogen synergistic flame-retardant benzoxazine is added into epoxy resin for thermocuring to obtain the composite material. The prepared benzoxazine flame retardant contains phosphorus and nitrogen elements, the nitrogen-based flame retardant has the advantages of low pollution, low smoke, good compatibility with EP and the like, and a quenching effect, a dilution effect and a carbon layer barrier effect can be generated in the combustion process to prevent further combustion of flames. The composite material has better flame retardant property, can effectively reduce the risk of fire hazard caused by overheating or short circuit of equipment, and ensures the safe and stable operation of energy equipment.