503 results about "P-Phenylenediamine" patented technology

The invention discloses a polyrotaxane covalent organic framework material capable of regulating interlayer spacing through cyclodextrin and application of the polyrotaxane covalent organic framework material, and belongs to the technical field of biological medicine. The polyrotaalkylated covalent organic framework material is obtained by taking a cyclodextrin aromatic multi-amino inclusion compound and a (multi-aldehyde bipyridine) ruthenium (II) complex as structural units and carrying out copolymerization; the cyclodextrin aromatic polyamine inclusion compound is a beta-cyclodextrin p-phenylenediamine inclusion compound with a hydroxyl group or without a hydroxyl group; the (multi-aldehyde dipyridyl) ruthenium (II) complex is tris (4, 4 '-diformaldehyde-2, 2'-dipyridyl) ruthenium (II). The interlayer spacing of the polyrotaxane covalent organic framework material is greatly increased by utilizing a cavity of gamma-cyclodextrin, and meanwhile, the material has excellent photo-thermal and photodynamic activity, is positively charged, and can better adsorb negatively charged bacteria; and the hydrogel is good in biocompatibility and free of toxic and side effects, and has an excellent treatment effect on wounds infected with staphylococcus aureus.

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 a preparation method and application of polysaccharide-based fluorescent carbon quantum dots with adjustable emission wavelength, and belongs to the technical field of preparation of fluorescent carbon nanomaterials. Polysaccharide is respectively mixed with different nitrogen dopants o-phenylenediamine, m-phenylenediamine and p-phenylenediamine, then the mixture is subjected to a hydrothermal reaction to respectively prepare blue, green and yellow green fluorescent carbon quantum dots, and then the blue, green and yellow green fluorescent carbon quantum dots are applied to nitrite detection. The carbon quantum dots with different emission wavelengths and different colors are obtained by adjusting the types of the nitrogen doping agents, the problems that the emission wavelengths of the carbon quantum dots cannot be adjusted and the range is narrow are solved, and reference is provided for subsequent design and opening of the generator-based multicolor fluorescent carbon quantum dots. Meanwhile, the biological polysaccharide is used as a raw material, deionized water is used as a solvent, the whole technological process is easy to operate and low in cost, and the method has far-reaching significance on further high-value utilization of biomass resources and promotion of sustainable utilization of the biomass resources.

The invention provides a core material for a vacuum insulation panel, the vacuum insulation panel and a preparation method and application of the vacuum insulation panel. The core material for the vacuum insulation panel comprises aramid fibers and a binding material, and the aramid fibers comprise at least one of poly (m-phenylene isophthalamide) fibers, poly (p-phenylene terephthalamide) fibers and heterocyclic aramid fibers; the length of the aramid fiber ranges from 1 mm to 10 mm. The vacuum insulation panel comprises a core material for the vacuum insulation panel and a barrier film material, and the barrier film material wraps the core material for the vacuum insulation panel. In the process of preparing the vacuum insulated panel and the process of cutting and producing the core material for the vacuum insulated panel, dust and fine fibers are not generated, and environmental pollution and health risks are avoided.

The invention discloses a production process of a modified p-phenylenediamine rubber anti-aging agent, which comprises the following steps: S1, catalyzing a ring-closure reaction through lipase, and accurately controlling pH by combining a phosphate buffer solution, so that the bonding efficiency of 6PPD and tea polyphenol is remarkably improved, and the release amount of aniline is effectively reduced; s2, carrying out spray drying to obtain EP-TP powder to control the particle morphology; s3, increasing the load rate of the anti-aging agent and effectively inhibiting the migration rate of the anti-aging agent through the pore diameter physical confinement of mesoporous silica and an amination gas phase modification technology, and ensuring uniform dispersion of anti-aging agent particles through the synergistic effect of staged load reaction and a polyethylene glycol dispersant; and S4, the particle morphology is cooperatively controlled through vacuum microwave drying, the dispersion requirement of the rubber mixing technology is met, and the interface bonding strength is improved by combining the staged loading reaction with a polyethylene glycol dispersing agent.

The invention relates to the technical field of battery electrodes, in particular to a zinc pole piece coated with a sulfonic COF membrane, a preparation method of the zinc pole piece and an aqueous zinc battery, and the preparation method comprises the following steps: dissolving 2, 4, 6-triformyl phloroglucinol and p-phenylenediamine-2, 5-disulfonic acid in an organic solvent to obtain a mixed solution; and putting the zinc foil into the mixed solution, carrying out sealed standing at normal temperature, taking out the zinc foil coated with the sulfonic group COF film, and washing and drying the zinc foil to obtain the zinc pole piece coated with the sulfonic group COF film. The prepared zinc pole piece coated with the sulfonic COF film has good corrosion resistance and dendritic crystal inhibition capacity, and when the zinc pole piece is used as a negative electrode of a water-based zinc battery, the cycle performance of the water-based zinc battery can be improved, and the cycle life of the water-based zinc battery can be prolonged; the problems that a zinc negative electrode of an existing water-based zinc battery is prone to generating dendritic crystal and corrosion passivation side reactions in the battery circulation process, so that the use performance of the water-based zinc battery is reduced, and the service life is greatly shortened are solved.

The invention relates to the technical field of heat dissipation materials, and discloses a graphite cooling fin of a multi-layer composite structure and a manufacturing process of the graphite cooling fin of the multi-layer composite structure. 15 to 25 parts of artificial graphite powder; 3 to 8 parts of an aniline-p-phenylenediamine copolymer; 2 to 6 parts of antimony oxide nano particles; 2 to 5 parts of urea; 1 to 3 parts of polyvinylpyrrolidone; the preparation method comprises the following steps: carrying out heat treatment on the artificial graphite film, and then carrying out mechanical pulverization; mixing the graphite oxide with an ethanol or water mixed solvent containing ammonia water; mixing the raw materials; performing vacuum defoamation and then coating on a base material; and performing carbonization treatment on the graphene film crude product, and performing lamination calendering treatment to form a final product. According to the technical scheme, the antimony oxide nano particles are adopted to synergistically adjust the heat conductivity, the effect of remarkably improving the transverse heat conductivity of the film body is achieved, the heat conductivity is enhanced, and material embrittlement caused by overfilling is avoided.

The invention relates to the technical field of aramid fibers, in particular to a heterocyclic aramid fiber and a preparation method thereof.The preparation method comprises the steps that S1, p-phenylenediamine, benzimidazole diamine and terephthaloyl chloride are subjected to a polymerization reaction in an amide solvent, and a polymer stock solution is obtained; s2, the polymer stock solution is subjected to spinning through a spinning nozzle, coagulating bath forming, drafting bath, alkali washing, water bath, drying, hot drafting, oiling and winding into a barrel, and the heterocyclic aramid fiber is obtained. In the step S1, the polymerization reaction temperature is-10 DEG C to 0 DEG C. According to the heterocyclic aramid fiber prepared by the preparation method, the problems of broken filaments, doubled filaments, sticky filaments, broken filaments and the like are obviously improved, the mechanical property is improved, the irregularity is reduced, and the product quality is excellent. The tensile strength of the heterocyclic aramid fiber is 30 to 37 cN / dtex, the elongation at break of the heterocyclic aramid fiber is 3.0 to 4.0 percent, and the elastic modulus of the heterocyclic aramid fiber is 950 to 1150 cN / dtex.

The invention relates to the field of lithium battery diaphragms, and particularly discloses an aramid diaphragm for a lithium battery and a preparation method of the aramid diaphragm. The aramid diaphragm for the lithium battery comprises aramid slurry and a base membrane, the aramid slurry is coated on two sides of the base membrane to form an aramid coating, and the aramid slurry is prepared from the following raw materials in parts by weight: 20-40 parts of aramid polymer liquid, 5-10 parts of tencel fibrillation slurry, 1-3 parts of titanium aluminum lithium phosphate nanoparticles, 3-5 parts of nano ceramic particles and 8-15 parts of solvent; the aramid polymer liquid is prepared from the following raw materials in parts by weight: 1 to 3 parts of p-phenylenediamine, 60 to 80 parts of polar solvent, 5 to 10 parts of paraphthaloyl chloride, 1 to 3 parts of 3, 4 '-diaminodiphenyl ether, 1 to 3 parts of o-chloro-p-phenylenediamine and 0.5 to 1 part of polyether surfactant; the aramid polymer liquid is combined with the nano ceramic particles and the tencel fibrillation slurry component to form an intercommunicated porous three-dimensional network structure, so that the air permeability, the thermal stability and the porosity of the aramid diaphragm are improved.

The invention relates to preparation and photocatalytic application of a three-component covalent organic framework photocatalyst. The invention aims to solve the problems of low visible light utilization rate, low efficiency of photocatalytic synthesis of hydrogen peroxide and complex synthesis process of a multi-component covalent organic framework material in the synthesis of a high-performance photocatalyst in the prior art. The method comprises the following steps: dispersing two reaction monomers into an organic solvent to form a mixed solution, adding a catalyst into the mixed solution, then adding the third monomer, carrying out ultrasonic dispersion, carrying out a heating reaction for a period of time, cooling to room temperature, and carrying out solid-liquid separation to obtain a solid; and carrying out solid separation, collecting the solid, washing and drying to obtain the three-component covalent organic framework material. The prepared TTBTP-1 three-component covalent organic framework photocatalytic material is high in crystallinity and good in catalytic effect and is superior to a two-component photocatalyst, the preparation method is simple, through the design thought that p-phenylenediamine is adopted as a linker to connect two monomers with different structures, the thought is broadened for the design of a novel COF structure and function, and the application prospect is broad. The method has important research significance.

The invention discloses a preparation method and application of a photo-thermal dual-response membrane material, and relates to the field of membrane materials. When the photo-thermal double-response membrane material is prepared, a photo-thermal material firstly reacts with 4-(triethoxysilyl) aniline and then reacts with 2, 4, 6-trihydroxy-1, 3, 5-benzenetricarboxaldehyde and p-phenylenediamine, and a modified photo-thermal material is prepared; the preparation method comprises the following steps: sequentially reacting benzaldehyde with 2-hydroxyacetophenone and 3-N, N-dimethylamino methacryloyl chloride to prepare a photo-initiation monomer; the preparation method comprises the following steps: mixing N-isopropylacrylamide, a photo-initiation monomer, N, N '-methylene bisacrylamide and a modified photo-thermal material, combining with a hydrophobic substrate membrane, preparing a membrane, and finishing the surface by using 2-bromo-1-[3, 5-di (tert-butyl)-4-hydroxyphenyl] ethanone, thereby obtaining the photo-thermal dual-response membrane material. The photo-thermal dual-response membrane material prepared by the invention has the characteristics of pollution resistance, easiness in cleaning, durability, antibacterial property, metal ion recovery and low energy consumption.

The invention discloses a modified heterocyclic aramid fiber and a preparation method thereof, and belongs to the technical field of high-performance organic fibers. The invention discloses a preparation method of a modified heterocyclic aramid fiber, which comprises the following steps: by taking 2-(4-aminophenyl)-5-aminobenzimidazole, p-phenylenediamine, isophthaloyl chloride and paraphthaloyl chloride as raw materials and LiCl as a catalyst, carrying out polymerization reaction in a solvent to obtain a polymer, and then spinning to obtain the modified heterocyclic aramid fiber. The invention also discloses the modified heterocyclic aramid fiber prepared by the method. According to the invention, m-phthaloyl chloride is creatively used for replacing a part of paraphthaloyl chloride and is subjected to nucleophilic reaction with 2-(4-aminophenyl)-5-aminobenzimidazole and p-phenylenediamine, so that the elongation at break of the fiber can be greatly improved under the condition that the breaking strength and other weather resistance of the original fiber are basically unchanged.

The invention discloses a PVC / PU modified material and a preparation method thereof, and belongs to the technical field of high polymer materials. The PVC / PU modified material comprises the following raw materials in parts by weight: 80-100 parts of PVC, 30-40 parts of PU, 10-20 parts of a plasticizer, 4-8 parts of a modified flame-retardant anti-aging agent, 2-4 parts of a stabilizer and 3-5 parts of a lubricant. The preparation method comprises the following steps: carrying out a reaction on cyanuric chloride and N-phenyl p-phenylenediamine to prepare an intermediate 1, carrying out a reaction on the intermediate 1 and 1-amino-10-undecene to prepare an intermediate 2, carrying out a reaction on diphenyl phosphinyl chloride and 1-amino-10-undecene to prepare an intermediate 3, and finally carrying out a reaction on the intermediate 2 and the intermediate 3 to prepare the modified flame-retardant anti-aging agent. The PVC / PU modified material prepared by the invention has excellent anti-aging performance and flame retardant performance.

The invention discloses a high-temperature-resistant, heat-insulating and flame-retardant poly (p-phenylene terephthamide) nanofiber composite aerogel as well as a preparation method and application thereof. The composite aerogel is prepared by slowly releasing proton to induce gel through a two-step sol-gel method. Firstly, carboxyl on a PAA molecular chain is introduced to interact with deprotonated amido in an ANF molecular chain, so that a part of a hydrogen bond system is recovered, ANF pre-gel is achieved, then Ti2CCl2 is dispersed into the ANF pre-gel system, the gelation process is further completed through protonic acid, and the ANF / Ti2CCl2 / ANF composite material is obtained. The composite aerogel is obtained through an improved directional freeze-drying technology and a solvent replacement method. The prepared composite aerogel combines the high thermal stability of Ti2CCl2 and the excellent mechanical property of ANF, has excellent flame retardance, high temperature resistance and heat shielding effectiveness, has wide application prospects in the fields of electronic heat dissipation, building energy efficiency, solar energy utilization and the like, and can meet the ever-increasing requirements for efficient thermal regulation and thermal protection.

The invention relates to the field of protective films, and discloses a liquid crystal display light guide plate TPE protective film and a preparation method thereof, the protective film comprises modified SBS, polypropylene, modified nano calcium carbonate, a lubricant and a plasticizer; the modified nano calcium carbonate is prepared by grafting a modified additive on the surface of nano calcium carbonate through chemical reaction and then coordinating with copper ions; the modified additive is prepared by preparing a chlorinated silicon-containing intermediate by using dichlorodiphenyl silane, diethylene glycol and cyanuric chloride as raw materials and then grafting a component I and 3-aminopropyltrimethoxysilane; the component I is prepared from 5-chloromethylthiazole and p-phenylenediamine through a reaction, and the modified SBS is prepared from epoxidized SBS and nano titanium dioxide subjected to amination modification by 3-aminopropyltriethoxysilane through a ring-opening reaction. The film material is endowed with excellent tensile strength, aging resistance and antibacterial and flame-retardant effects.

The invention discloses a method for detecting L-cysteine in serum based on N, S co-doped carbon nanodots, and belongs to the field of analysis and detection. The method comprises the following steps: (1) preparing carbon dots by taking beta-mercaptoethylamine and p-phenylenediamine as precursors; (2) after Fe < 3 + > is added into the carbon dot solution, a carbon dot fluorescence quenching phenomenon occurs, and a carbon dot-Fe < 3 + > mixed system is obtained; then adding L-cysteine into the carbon dot-Fe < 3 + > mixed system to gradually recover the fluorescence of the system; and (3) constructing a linear relationship between the concentration of the L-cysteine and the fluorescence recovery degree to obtain the quantitative detection model for the L-cysteine in the serum sample. According to the method, the carbon dots are prepared by taking beta-mercaptoethylamine and p-phenylenediamine as precursors for the first time, quantitative detection of L-cysteine is realized, and the method is low in cost, high in sensitivity, suitable for field rapid detection and relatively high in practical value and popularization prospect.

The invention relates to the technical field of high-molecular compounds, and particularly discloses a preparation method of a late transition metal catalyst for synthesizing hyperbranched polyethylene. The preparation method comprises the following steps: under the protection of inert gas, dissolving p-phenylenediamine into anhydrous alcohol, adding pyridine-2-formaldehyde into a mixed solution, and heating to react to obtain a ligand A; the method comprises the following steps: under the protection of inert gas, dropwise adding an alcoholic solution of a metal precursor into a chlorinated alkane solution dissolved with a ligand A, and then fully reacting at room temperature; and after the reaction is finished, purifying the product to obtain the late transition metal catalyst. The metal precursor is a bivalent Fe salt, a bivalent Co salt and a bivalent Ni salt. According to the synthetic catalyst, the polymerization activity of the late transition metal catalyst can be enhanced, and the synthesis of hyperbranched polyethylene is facilitated. The molecular weight of the hyperbranched polyethylene catalyzed by the catalyst is 1.1-2.6 kg / mol, the molecular weight distribution PDI is less than 2, and the branching degree is more than 100.

Provided are covalent organic frameworks (COFs). Also provided are methods of making the COFs and methods of using the COFs. The COF sheets define a plurality of pores, and stack in an eclipsed configuration to form sheets that assemble to form nanoparticles. Each COF sheet may be a co-condensate of p-phenylenediamine (PA) and (i) triformylbenzene (TFB) and triformylphloroglucinol (TP) or (ii) triformylphloroglucinol (TP). A COF of the present disclosure has the following structure: Formula (I) and / or Formula II where each X2 is Formula (III) where earch X1 is Formula (IV) Formula (V) Formula (VI) Formula (VII) Formula (VIII) Formula (IX) Formula (X) Formula (XI) Formula (XII) Formula (XIII) or any tautomer thereof, where at least one X1 is not Formula (XIV).

The invention discloses environment-friendly wormwood cloud wool and a preparation method thereof, and relates to the technical field of cloud wool. The preparation method comprises the following steps: adding titanium dioxide powder into an ethyl sorbate solution, coating a polyethyl sorbate film through an in-situ polymerization method, hydrolyzing ethyl sorbate to release carboxyl to obtain modified titanium dioxide powder, and mixing the modified titanium dioxide powder with waste polyester and wormwood powder to form a spinning solution; secondly, N, N, N ', N'-tetramethyl-p-phenylenediamine and 6-iodine-1-hexene are subjected to a reaction to prepare quaternary ammonium salt, double bonds are introduced into a compound, then the compound and 11-mercaptoundecyltrimethoxysilane are subjected to an ultraviolet click reaction, and mercapto modified quaternary ammonium salt is prepared; sulfydryl modified quaternary ammonium salt is used as an antistatic agent to be added into a spinning solution, the environment-friendly wormwood cloud wool is prepared through wet spinning, sulfydryl modification is beneficial to uniform dispersion of the quaternary ammonium salt in the spinning solution, and uneven fiber structure or breakage caused by uneven dispersion of an additive is reduced. The environment-friendly wormwood cloud velvet prepared by the preparation method disclosed by the invention has antibacterial and antistatic effects.

The invention relates to the technical field of anti-aging coatings, in particular to a tire anti-aging coating and a preparation method thereof. According to the invention, the problems of poor adhesive force and poor aging resistance of a tire coating are solved; through the synergistic effect of the epoxy polysiloxane and the waterborne polyurethane-acrylate copolymer emulsion, multi-stage bonding of a tire / coating interface is realized, and the added fluorosilicone block copolymer can further form a protective barrier; by preparing modified nano silicon dioxide, active groups grafted by a silane coupling agent on the surface capture free radicals, and an oxidation chain reaction is blocked; n, N '-diphenyl-p-phenylenediamine released by the polyurea microcapsules can remove free radicals generated by oxidation in the coating, and the N, N'-diphenyl-p-phenylenediamine is matched with the compound light stabilizer to form a dynamic defense chain; a flexible long chain of the polycaprolactone polyol inhibits crack propagation through free volume filling, and the four components synergistically improve ultraviolet resistance, ozone resistance and oxidation corrosion resistance; and through a staged low temperature-medium temperature-high temperature gradient curing strategy, the adhesive force of the coating is improved.

The invention relates to application of a non-noble metal catalyst Cu-ZnO / TiO2 in catalytic synthesis of N, N '-dicyclohexyl p-phenylenediamine in a heterogeneous system, and belongs to the technical field of catalyst preparation and application. According to the catalyst, zinc nitrate hexahydrate serves as a zinc source, copper nitrate trihydrate serves as a copper source, P25 type titanium dioxide serves as a carrier, metal is loaded on titanium dioxide through a fractional precipitation method, the titanium dioxide is put into a tubular furnace for hydrogen reduction, a catalyst Cu-ZnO / TiO2 is obtained, then the catalyst Cu-ZnO / TiO2 is dispersed in a solvent, and the novel rubber anti-aging agent N, N-dimethylformamide is synthesized by catalyzing a photo-thermal reduction amination reaction of p-phenylenediamine and cyclohexanone. The catalyst is N, N '-dicyclohexyl p-phenylenediamine. Wherein the Cu-ZnO / TiO2 catalyst with the content of copper being 7% and the content of zinc oxide being 4% has excellent catalytic performance, the conversion rate of p-phenylenediamine reaches 100% and the selectivity of N, N '-dicyclohexyl p-phenylenediamine reaches 99.9% when the hydrogen pressure is 6 MPa, the temperature is 200 DEG C and the reaction is performed for 10 h. The preparation method is simple, low in cost and high in catalytic selectivity, and has a wide industrialization prospect.

The invention discloses a high-elastic material for an anti-slip sole and a preparation method of the high-elastic material in the field of high polymer materials. The high-elastic material is prepared from the following raw materials: modified polyurethane, modified silicone rubber, calcium carbonate, dicumyl peroxide, 2-mercaptobenzothiazole, N-isopropyl-N '-phenyl p-phenylenediamine and naphthenic oil. Wherein the modified polyurethane is prepared by the following steps: carrying out vacuum dehydration on polybutylene adipate, reacting with toluene diisocynate to prepare an isocyanate-terminated prepolymer, adding dimethylolpropionic acid, triethylamine and deionized water to obtain a water-based dispersion, and carrying out graft copolymerization on the water-based dispersion, methyl methacrylate and the like; the preparation method comprises the following steps: preheating modified polyurethane, mixing with modified silicone rubber at a high speed, adding calcium carbonate and naphthenic oil, carrying out double-roller open milling and thin-passing, adding a vulcanizing agent and the like, carrying out overturning milling, and carrying out flat plate vulcanization molding. The material is used for anti-skid soles, and has the advantages of high elasticity, lasting skid resistance and excellent weather resistance.

The invention discloses a flue gas distributed denitration process, and belongs to the technical field of fuel gas distributed energy supply. Ammonia gas is added into flue gas at an inlet of a bag-type dust collector and reacts with nitrogen oxide in the flue gas at an active site of a low-temperature denitration catalyst, so that efficient denitration can be realized at a low temperature, and nontoxic and harmless nitrogen and water are generated; reheating denitration is not needed; according to the low-temperature denitration catalyst, cerium nitrate and manganese nitrate are impregnated into mesoporous pores of mesoporous titanium dioxide submicrospheres through vacuum impregnation, glucose serves as a carbon source, p-phenylenediamine serves as a nitrogen source, and manganese cerium / nitrogen-doped titanium dioxide microspheres are obtained through hydrothermal carbonization. And then MOF-tungsten is dispersed in silicon dioxide sol to coat the manganese cerium / nitrogen-doped titanium dioxide microspheres, so that the manganese cerium / nitrogen-doped titanium dioxide microspheres have good compressive strength, wear resistance and denitration efficiency, have excellent ammonium bisulfate decomposition capability and are not easy to block.

The invention discloses a preparation method of a waste paper regenerated fiber super-hydrophobic anti-icing coating, and relates to a preparation method of an anti-icing coating, and the method comprises the following steps: preparing nano cellulose powder through recycled waste paper, modifying the nano cellulose powder through dopamine hydrochloride, p-phenylenediamine and octadecylamine to form OA-CP-F powder, and compounding the OA-CP-F powder with epoxy resin and an epoxy resin curing agent to form a spraying coating, the curing agent is an epoxy resin common curing agent. The coating with a micro-nano composite structure is formed on the surface of a base material by adopting a spraying method, the contact angle is as high as 155 degrees, the icing time can be remarkably prolonged to 358s (-20 DEG C), an ice layer on the surface of the coating is loose frost ice and is extremely easy to fall off, the icing risk of various materials can be remarkably reduced, and the coating is suitable for the fields of aerospace, electric power facilities and the like.

According to the present invention, ozone can be dissolved in water with high efficiency and the sustainability of the ozone concentration in the obtained ozone-containing water can be greatly improved. [Solution] With respect to the generated ozone-containing water, the first in-liquid ozone concentration A is the concentration of ozone contained therein which is determined by an ultraviolet absorption method, the second in-liquid ozone concentration B is the concentration of ozone contained therein which is determined by a diethyl-p-phenylenediamine method, the in-liquid ozone concentration difference C = A – B is the value obtained by subtracting the second in-liquid ozone concentration B from the first in-liquid ozone concentration A, and the in-liquid ozone concentration difference ratio C / A is the ratio of the in-liquid ozone concentration difference C to the first in-liquid ozone concentration A. The starting material water is passed through a gas ejection nozzle so that the value of C / A is 20% or more.

The present invention relates to the technical field of waste asphalt regeneration, specifically an asphalt regeneration agent, a modified regenerated asphalt mixture, and a preparation method and use thereof. The asphalt regeneration agent is made of a thinning oil, a plasticizer, a surfactant, a methyl long carbon chain alkyl silicone oil, liquid EVA, emulsion styrene-butadiene rubber, a liquid petroleum resin, LLDPE, Mxenes, and a microcapsule stabilizer composed of ethylene bisstearamide, sulfur, and N-phenyl-N'-cyclohexyl-p-phenylenediamine. The modified regenerated asphalt mixture is made of milling material, an asphalt regeneration agent, SBS modified asphalt, new aggregate, and mineral powder. The prepared asphalt regeneration agent can increase the amount of milling material in the regenerated asphalt mixture and improve the performance of the regenerated asphalt mixture, thereby facilitating the recycling of waste asphalt, improving resource utilization, and reducing the cost of asphalt pavement construction.

The present invention discloses a p-phenylenediamine compound, a preparation method thereof and an application thereof. The compound is obtained by subjecting 2,4-diaminodiphenylamine and a ketone to a hydrogenation reaction in the presence of a catalyst. Compared with the current mainstream antioxidant 6PPD, the compound of the present invention has good anti-dynamic / static ozone protection performance, good anti-dynamic fatigue performance and anti-migration discoloration performance; the tire added with the compound of the present invention will not produce residues of toxic p-benzoquinone structural substances during use, is more environmentally friendly, is an ideal substitute for antioxidant 6PPD, has good economic and social benefits, and has a broad market prospect.

The invention relates to a PPTA (poly-p-phenylene terephthalamide) resin and preparation and application thereof, through segmented design of a polymerization process of the PPTA, paraphthaloyl chloride is partially replaced by a low-cost monomer terephthalic acid, so that the molecular weight distribution of the prepared PPTA resin is macroscopically controllable, and the PPTA resin has the advantages that the molecular weight distribution is controllable; compared with the original polymerization process, the production cost is greatly reduced, the reaction process is stable and easy to control, and industrial production is facilitated.

The invention discloses a sewage treatment membrane and a preparation method thereof, and relates to the field of sewage treatment. When the sewage treatment membrane is prepared, porous nano titanium dioxide, 3, 5-diaminopyrazole and benzo [1, 2-B: 3, 4-B ': 5, 6-B'] trithiophene-2, 5, 8-trialdehyde are uniformly mixed to prepare modified nano titanium dioxide; the preparation method comprises the following steps: reacting 1, 3, 5, 7-tetramethylcyclotetrasiloxane, 1, 3-bis (3-aminopropyl) tetramethyldisiloxane, 2-vinyl imidazole and 1-allylhydantoin to prepare functionalized amino siloxane; and uniformly mixing p-phenylenediamine, functionalized amino siloxane, pyromellitic dianhydride, modified nano titanium dioxide and zinc nitrate hexahydrate, and treating with a sodium hypochlorite solution to obtain the sewage treatment membrane. The sewage treatment membrane prepared by the invention has excellent heavy metal ion complexing property, antibacterial property and photocatalytic degradability.

The invention relates to the technical field of agricultural biological prevention and control, and discloses a biological prevention and control complex microbial inoculant and application thereof.The biological prevention and control complex microbial inoculant is prepared by the steps that natural bio-based compounds vanillin and vanillic acid serve as main raw materials, and a biodegradable trialdehyde monomer is designed and synthesized; a biodegradable trialdehyde monomer and p-phenylenediamine are used as organic building units to assemble and form an ordered porous crystal structure, and the biodegradable COF material is obtained; the preparation method comprises the following steps: loading a basic complex microbial inoculant consisting of bacillus thuringiensis, bacillus subtilis and streptomyces willerigensis on a biodegradable COF material by adopting an impregnation adsorption method, and coating the surface of the biodegradable COF material with tetraethylenepentamine and tannic acid through copolymerization to form a degradable polytannic acid layer, so as to prepare the slow-release complex microbial inoculant, and the effective active components of the slow-release complex microbial inoculant can be slowly released; the lasting period and the utilization rate of the composite microbial agent can be remarkably improved, and the composite microbial agent shows an obvious inhibition effect on pathogenic bacteria such as fusarium oxysporum and botrytis cinerea and can be applied to prevention and treatment of plant diseases.