238 results about "M-Phenylenediamine" patented technology

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 discloses a lignin-based epoxy resin derived porous carbon composite electrode material and a preparation method and application thereof, and belongs to the technical field of electronic materials. Sodium lignin sulfonate, hydroquinone and epichlorohydrin are used as main raw materials, m-phenylenediamine is added for polycondensation to prepare a lignin-based epoxy resin polymer, then lignin-based epoxy resin derived porous carbon is obtained through pre-carbonization and high-temperature pyrolysis, finally, the porous carbon adsorbs aniline and then is subjected to in-situ polymerization, and the lignin-based epoxy resin derivative porous carbon is obtained. The lignin-based epoxy resin derivative porous carbon composite electrode material is obtained. The lignin-based epoxy resin derived porous carbon has a hierarchical pore structure, the specific surface area reaches 2287.87 m / g, and the mass specific capacitance of the polyaniline-introduced composite electrode material reaches 497.7 F / g. The composite electrode material has excellent electrochemical performance, the preparation process is safe and easy to implement, the cost is low, and the application prospect is wide.

The invention provides a preparation method for a reverse osmosis membrane resistant to a high-temperature water environment, comprising: synthesizing an α-cyclodextrin@polyethylene glycol supramolecular inclusion complex by a saturated aqueous solution coprecipitation method; preparing an aqueous phase solution containing m-phenylenediamine, D(+) camphorsulfonic acid and triethylamine; preparing an oil phase solution containing trimesoyl chloride; preparing a secondary aqueous solution containing α-cyclodextrin@polyethylene glycol powder and triethylamine; forming an ultrathin polyamide separation layer on a base membrane by interfacial polymerization; and performing secondary interfacial polymerization to form an α-CD@PEG polyester protection layer, and storing a prepared reverse osmosis membrane in ultrapure water.

The invention relates to the technical field of preparation of reverse osmosis membranes, and particularly discloses a preparation method of a high-flux seawater desalination reverse osmosis membrane, which comprises the following steps: step 1, preparing a water phase solution, mixing m-phenylenediamine and 4-aminoanisole according to a mass ratio of 4: 1, adding camphorsulfonic acid and triethylamine, then adding into deionized water, and stirring to obtain the water phase solution; the total mass fraction of m-phenylenediamine and 4-aminoanisole is 4 wt%, the mass fraction of camphorsulfonic acid is 4 wt%, the mass fraction of triethylamine is 2 wt%, and the total mass fraction of m-phenylenediamine and 4-aminoanisole is 4 wt%. The modified nano silicon dioxide is nano silicon dioxide modified by gamma-aminopropyltriethoxysilane, and the particle size of the modified nano silicon dioxide is 30nm. According to the preparation method of the high-flux seawater desalination reverse osmosis membrane, the purposes that the high flux, high stability, excellent corrosion resistance and high structural strength of the reverse osmosis membrane are synergistically improved, and the seawater desalination effect is remarkably optimized are achieved.

A plugging material is prepared from the following raw materials in terms of mass fractions, which include: 1 to 3.6 parts of PETA-modified bisphenol A epoxy resin, 1.5 to 2.4 parts of addition product of m-phenylenediamine and methacrylic acid, 0.12 to 0.17 parts of nanosilica dispersion liquid, with the remainder being water, such that the sum of the mass fractions of the aforementioned raw materials totals 100 parts. The preparation method includes: pouring a water phase mixture into a continuously stirred oil-phase mixture to form a gel-forming liquid through continued stirring; transferring the gel-forming liquid to be mixed with dibenzoyl peroxide, and stirring and reacting at a temperature of 50° C. to 120° C. to obtain the plugging material. The plugging material is resistant to high temperatures and high salinity, and exhibits strong plugging performance.

The invention relates to a reverse osmosis membrane and a preparation method thereof, and the preparation method comprises the following steps: immersing a polysulfone-based membrane into a dopamine-containing mixed solution, and carrying out constant-temperature oscillation to form a dopamine pretreatment layer so as to obtain a modified base membrane; dissolving rosmarinic acid ester modified m-phenylenediamine, piperazine, a surfactant, an auxiliary agent and a pH regulator in water, and stirring for dissolving to obtain a water phase solution; dissolving an acyl chloride monomer in an organic solvent, stirring and dissolving, then adding the modified titanium dioxide, and carrying out ultrasonic dispersion to obtain an oil phase solution; immersing the modified base membrane into the water phase solution, taking out the modified base membrane, immersing the modified base membrane into the oil phase solution, taking out the modified base membrane and drying the modified base membrane to obtain a pre-compounded reverse osmosis membrane; and carrying out post-treatment on the pre-compounded reverse osmosis membrane to obtain the reverse osmosis membrane. Under the condition that the water yield is guaranteed, the reverse osmosis membrane disclosed by the invention has a high desalination rate and the oxidation resistance of the reverse osmosis membrane is improved for a long time.

The invention discloses an activated carbon modification method which comprises the following steps: activating activated carbon through plasma, and then performing graft modification by using 3-amino-5-sulfydryl-1, 2, 4-triazole (AMT) to obtain the activated carbon. The method aims at solving the problems that in an existing modification process, the grafting rate is low, the adsorption performance is poor, and pores are prone to being damaged, and the method is suitable for continuous treatment of the m-phenylenediamine (MPD) oxidation color development aqueous solution. According to the process, the AMT grafting rate of the modified activated carbon is 1.0-1.2 mmol / g, the specific surface area is 950-1100 m < 2 > / g, the pore volume ratio of activated mesopores is increased to 43%, the decolorization rate is greatly increased, the saturated adsorption period of the activated carbon is prolonged, and the solution can be kept basically colorless within 120 hours by using 0.5 wt% of activated carbon under a static adsorption condition.

The invention relates to a reverse osmosis membrane and a membrane assembly, in particular to the technical field of reverse osmosis membranes, and discloses a preparation method of a high-pressure-resistant reverse osmosis membrane, which comprises the following steps: immersing a porous support base membrane in a water phase solution containing 0.8-2.5 wt% of m-phenylenediamine, 0.05-0.1 wt% of carboxylated hyperbranched nanoparticles and 0.03-0.1 wt% of a nonionic surfactant for 90-150s; removing redundant aqueous phase solution, and then transferring into an oil phase n-hexane solution containing 0.05 to 0.5 weight percent of trimesoyl chloride and 0.05 to 0.2 weight percent of aminated MOFs (Metal-Organic Frameworks) to react for 45 to 75 seconds; performing heat treatment at 65 to 75 DEG C for 10 to 15 minutes; 0.5-2.0 wt% of a sodium hydrogen sulfite aqueous solution is adopted for post-treatment and curing to form the film. According to the preparation method, carboxylated hyperbranched nanoparticles are introduced into a water phase, and aminated MOFs are introduced into an oil phase, so that a rigid-flexible coupled nanometer enhanced interface is constructed; meanwhile, post-crosslinking and sodium hydrogen sulfite chemical curing are utilized to form a compact, tough and high-mechanical-strength PA functional layer. After the obtained membrane continuously runs for 48 hours at 150 bar, the membrane returns to 55 bar for testing, and the water flux attenuation amplitude is 1t; the retention rate of NaCl is greater than or equal to 99.5%.

The invention discloses a battery diaphragm, a preparation method thereof and a secondary battery, and belongs to the technical field of batteries. The battery diaphragm comprises a base membrane and a heat-resistant layer stacked on the surface of at least one side of the base membrane, the heat-resistant fibers in the heat-resistant layer are selected from polyimide fibers, polyethylene glycol terephthalate fibers, polyamide-imide fibers, polyether-ether-ketone fibers, cellulose nanofibers, poly-p-phenylene terephthamide fibers, poly-m-phenylene isophthamide fibers, polyphenylene sulfide fibers and polyacrylonitrile fibers, and the heat-resistant fibers in the heat-resistant layer are selected from polyimide fibers, polyethylene glycol terephthalate fibers, polyamide-imide fibers, polyether-ether-ketone fibers, cellulose nanofibers, poly-p-phenylene terephthamide fibers, poly-m-phenylene isophthamide fibers, polyphenylene sulfide fibers and polyacrylonitrile fibers. The fiber is at least one of polyvinyl alcohol fiber and poly (p-phenylene benzobisoxazole) fiber; the thickness H1 of the heat-resistant layer and the thickness H2 of the base film satisfy 0.02 < = H2 / H1 < = 10; the porosity (X) of the base film and the porosity (Y) of the heat-resistant layer satisfy 20% < = X + Y < = 90% and 20% < = X < = 60%. The battery diaphragm can be baked at the temperature of 100 DEG C or above, and has relatively high puncture strength.

The invention belongs to the technical field of chemical membrane separation, and particularly relates to an oxidation-resistant composite reverse osmosis membrane and a preparation method thereof.The preparation method comprises the following steps that a m-phenylenediamine water-phase solution, a trimesoyl chloride oil-phase solution and a cyanuric chloride oil-phase solution are prepared; soaking the porous support body in a m-phenylenediamine water phase solution, then soaking the porous support body in a trimesoyl chloride oil phase solution, and carrying out interfacial polymerization reaction to prepare a nascent state reverse osmosis membrane; soaking the nascent state reverse osmosis membrane in a cyanuric chloride oil phase solution, then soaking the nascent state reverse osmosis membrane in a m-phenylenediamine water phase solution, and carrying out interfacial polymerization reaction again to prepare a polyamide and polytriazine composite membrane; and carrying out heat treatment on the polyamide and polytriazine composite membrane to prepare the oxidation-resistant composite reverse osmosis membrane. The preparation method is simple in process, the prepared composite reverse osmosis membrane is good in oxidation resistance and high in desalination performance, and the prepared oxidation-resistant composite reverse osmosis membrane is gt in desalination rate; the oxidation resistance is gt; and the reaction time is 20000ppmh.

The invention discloses a basalt fiber reinforced asphalt mixture based on solid waste synergy and a preparation method of the basalt fiber reinforced asphalt mixture, and belongs to the field of asphalt mixtures. The basalt fiber reinforced asphalt mixture based on solid waste synergy is prepared from the following raw material components in parts by mass: 1000 to 1200 parts of aggregate, 3 to 5 parts of modified basalt fiber, 50 to 73 parts of waste rubber modified asphalt, 2 to 4.38 parts of amphiphilic epoxy resin, 0.7 to 1.5 parts of curing agent and 0.06 to 0.13 part of accelerant, the modified basalt fiber is obtained by modifying triethoxysilyl butyraldehyde, 3-mercaptopropyltrimethoxysilane and allyl-1, 3-sultone, and the modified basalt fiber is prepared by modifying the triethoxysilyl butyraldehyde, the 3-mercaptopropyltrimethoxysilane and the allyl-1, 3-sultone; the amphiphilic epoxy resin is obtained by reacting dodecyl succinic anhydride, polyethylene glycol monomethyl ether 2000 and epoxy resin; m-phenylenediamine and 2-amino-4-cyanopyridine are adopted as the curing agent; n-methylimidazole is adopted as the accelerant; the asphalt mixture prepared by the invention has good rut resistance, crack resistance and water stability.

The invention discloses long-acting high-dynamic hydrazone bond hydrogel as well as a preparation method and application thereof, and particularly relates to the technical field of biomedical materials. The preparation method comprises the following steps: taking 1-adamantane acetic acid and adipic dihydrazide modified sodium hyaluronate and benzaldehyde-terminated eight-arm polyethylene glycol as carrier raw materials; the hydrazone bond hydrogel with relatively high stability is prepared through a coupling reaction of an aldehyde group of benzaldehyde-terminated eight-arm polyethylene glycol and a hydrazide group of 1-adamantane acetic acid and adipic dihydrazide modified sodium hyaluronate. The beta-cyclodextrin modified m-phenylenediamine catalyst is dynamically combined into the carrier through reversible host-guest complexation between beta-cyclodextrin and 1-adamantane acetic acid, so that the long-acting high-dynamic hydrazone bond hydrogel is obtained, and the requirement of three-dimensional culture of stem cells on mechanical properties can be met; and network dynamics can be maintained for a long time, so that stem cell spreading is supported, mechanical signal transduction is activated, osteogenesis-related gene expression is promoted, and stem cell osteogenesis differentiation capability is enhanced.

The invention relates to the technical field of detection and identification of fentanyl substances, and discloses a selective quantitative detection method of fentanyl. According to the method, a differential pulse voltammetry (DPV) is used for making a linear relation diagram of a potassium ferricyanide peak current and fentanyl solutions with different concentrations to obtain a standard working curve, a linear equation is obtained through the standard curve, and the detection limit is 1.0 * 10 <-12 > mol.L <-1 >; the molecularly imprinted membrane modified electrode prepared by the invention is used for measuring the peak current of a potassium ferricyanide solution, so that fentanyl molecules can be indirectly and quantitatively analyzed and measured. The method is characterized in that a fentanyl molecularly imprinted membrane is electrically polymerized on the surface of a glassy carbon electrode, m-phenylenediamine is used as a functional monomer, and the selectivity and sensitivity of an electrochemical method for detecting fentanyl are improved. Meanwhile, by taking an adsorption pulse stripping voltammetry (DPASV) as a detection technology, a method capable of rapidly detecting fentanyl molecules in the presence of various drugs is established. The molecularly imprinted membrane electrode disclosed by the invention is simple to prepare, quick in response and good in selectivity and reproducibility, and can be repeatedly used for more than five times.

The application relates to the technical field of high polymer materials, and discloses a phosphorus-containing flame-retardant epoxy resin and a preparation method thereof, which comprises the following components by weight: 50-65 parts of bisphenol A type epoxy resin, 4-6 parts of phosphorus-containing modified benzimidazole, 2-3 parts of epoxy-based sulfanilamide thiazole and 2-4 parts of m-phenylenediamine curing agent. The bisphenol A type epoxy resin is added into a stirrer, heated, and then the phosphorus-containing modified benzimidazole and the epoxy-based sulfanilamide thiazole are continuously added into the stirrer; after cooling, the m-phenylenediamine curing agent is continuously added into the stirrer, and then curing is carried out, so that the phosphorus-containing flame-retardant epoxy resin is obtained. The phosphorus-containing flame-retardant epoxy resin has good flame-retardant effect.

The present application relates to the technical field of fibrid, in particular to a bio-based aramid fibrid, a preparation method and application, the preparation method is: S1, after the polymerization reaction of m-phenylenediamine and isophthaloyl chloride in a polar solvent is completed, furan dicarboxylic chloride is added for reaction, and neutralization treatment is carried out to obtain a polymer; S2, the polymer is added to a fibrid agent for fibrid treatment to obtain the bio-based aramid fibrid; the fibrid agent comprises DMAC, water and dichloromethane. In the preparation method of the bio-based aramid fibrid, through the change of chemical modification and fibrid process, the size of the prepared fibrid is concentrated in the range of 0.05-0.1 mm, the beating degree is stable at 80-90 °SR, the prepared fibrid has better combination capacity than short cut fibers, and the index of aramid paper is improved.

The application discloses a preparation method of an ultrathin photothermal distillation membrane and application thereof, and belongs to the technical field of water treatment. The preparation method comprises the following steps: spraying an ethanol dispersion solution of CNTs after acid treatment on the front surface of a polypropylene microporous filter membrane to form a CNT layer; spraying a polyvinyl alcohol solution on the surface of the CNT layer and drying to obtain a composite membrane; immersing the composite membrane in a glutaraldehyde-hydrochloric acid solution for crosslinking to obtain a CNT-loaded photothermal layer; dissolving m-phenylenediamine in deionized water to form an aqueous phase; dissolving a hydrophobic silane coupling agent in an organic solvent to form an organic phase; pouring the aqueous phase onto the surface of the photothermal layer for infiltration to obtain a photothermal layer with adsorbed m-phenylenediamine; pouring the organic phase onto the surface of the photothermal layer with adsorbed m-phenylenediamine for reaction to obtain an ultrathin hydrophobic separation layer; and drying the obtained membrane to obtain the ultrathin photothermal distillation membrane. The ultrathin photothermal distillation membrane obtained by the application can efficiently treat farmland wastewater, effectively remove heavy metals and reduce the content of organic pollutants.

The application belongs to the technical field of lithium ion batteries, and discloses a poly-m-phenylene isophthalamide-based electrostatic spinning flame-retardant separator and application thereof. The m-phenylene isophthalamide-based electrostatic spinning separator, namely PMIA-based electrostatic spinning separator, is prepared by mixing modified PZS microspheres, PMIA and an organic solvent, and then adopting an electrostatic spinning method. The modified PZS microspheres are prepared by in-situ growth of an inorganic layer SiO2 on the surface of polyphosphazene PZS microspheres with flame-retardant properties. The polyphosphazene PZS microspheres are prepared by a polymerization reaction between tannic acid and hexachlorocyclotriphosphazene. The spinning separator prepared by the application has very excellent porosity, liquid absorption rate and ionic conductivity, and good thermal stability and flame retardancy.

The invention relates to the field of polymer-grade m-phenylenediamine production, and provides a production method of high-purity polymer-grade m-phenylenediamine, which comprises the following steps: carrying out first-grade melt crystallization treatment on a raw material m-phenylenediamine; carrying out heating sweating treatment on crystals obtained by the first-stage melt crystallization, and then completely melting the first-stage crystals to obtain first melt feed liquid; carrying out second-stage melt crystallization treatment on the first melt feed liquid, then mixing a second mother liquid with the first sweat, and using the mixed material as a raw material for first-stage melt crystallization treatment; performing heating sweating treatment on crystals obtained by the second-stage crystallization, supplementing second sweat as a raw material into second-stage melt crystallization treatment, and completely melting the second-stage crystals to obtain high-purity melt feed liquid; carrying out rectification decoloration treatment on the high-purity molten feed liquid to obtain high-purity polymer-grade m-phenylenediamine; the purity of the high-purity polymer-grade m-phenylenediamine is greater than or equal to 99.98%, and the content of toluenediamine is less than or equal to 50ppm.

The invention discloses a preparation method and application of a bimetallic nano-enzyme induced MOFs (at) CDs material, and the preparation method at least comprises the following steps: I, dissolving FeCl3, CoCl2 and 2-aminoterephthalic acid in N, N '-dimethylformamide to form a mixed solution I, and carrying out a reaction I to obtain a bimetallic MOFs material; step II, mixing tricarballylic acid and m-phenylenediamine, and carrying out a reaction II to obtain carbon dot powder; step III, dissolving the carbon dot powder obtained in the step II in methanol, and adding rhodamine B dye to obtain a CDs material; and IV, dissolving the bimetallic MOFs material obtained in the step I and the CDs material obtained in the step III in water, stirring, and drying to obtain the MOFs (at) CDs material. The synthesized nano-enzyme is simple to prepare and high in catalytic activity, the carbon dot material is encapsulated into the MOFs material, the fluorescence characteristic of the MOFs material is enhanced, and the carbon dot material is combined with o-phenylenediamine to be used for detecting H2O2.

Provided is a polyimide resin powder which contains a tetracarboxylic acid component and a diamine component. The tetracarboxylic acid component includes 3,3',4,4'-biphenyltetracarboxylic acid dianhydride and 2,3,3',4'-biphenyltetracarboxylic acid dianhydride. The diamine component includes p-phenylenediamine and m-phenylenediamine and / or 4,4'-diaminodiphenyl ether. The content of p-phenylenediamine is 70-98 mol% based on the total molar amount of the diamine component. The total content of m-phenylenediamine and 4,4'-diaminodiphenyl ether is 2-30 mol% based on the total molar amount of the diamine component.

The invention relates to the technical field of reverse osmosis membranes, in particular to a reverse osmosis membrane as well as a preparation method and application thereof. The reverse osmosis membrane comprises a polysulfone supporting layer; the aromatic polyamide separation layer is formed on the surface of the polysulfone supporting layer and is formed through an interfacial polymerization reaction of m-phenylenediamine and trimesoyl chloride; the surface of the aromatic polyamide separation layer is coated with the composite modified layer, and the composite modified layer comprises modified nano-hydroxyapatite, a zwitterionic polymer, an antioxidant, nano-silica and a quaternary ammonium salt functionalized silane coupling agent. The reverse osmosis membrane structure improves the hydrophilicity and the surface charge characteristic of the membrane, and enhances the pollution resistance, the antibacterial property and the separation performance of the membrane. The aromatic polyamide separation layer formed through interfacial polymerization has desalting capacity, and the composite modification layer improves the interception efficiency of colloidal particles and has good cleaning regeneration capacity and long-term operation stability.

The invention discloses a preparation method of a high-performance composite reverse osmosis membrane based on interfacial polymerization reaction in-situ modification. According to the method, after m-phenylenediamine (MPD) and 1, 3, 5-benzoyl chloride (TMC) are subjected to interfacial polymerization to form a polyamide (PA) selection layer, a nucleophilic catalyst is innovatively introduced to carry out in-situ modification on the selection layer, and a novel PA separation layer with a loose and uniform structure is obtained by regulating and controlling molecular crosslinking density and a chemical structure. Compared with the prior art, the modified reverse osmosis membrane shows remarkably improved hydrophilicity and optimized pore size distribution, the water flux is improved by more than 50% on the premise of not influencing the rejection rate, and meanwhile, excellent long-term operation stability is kept. The technology breaks through the bottleneck of mutual restriction of permeability and selectivity of the traditional reverse osmosis membrane, and has wide application prospects in the fields of seawater desalination, wastewater reuse and the like.

The invention discloses a preparation method of an antibacterial sleep-aiding latex pillow, and relates to the technical field of latex. Silicon dioxide is preliminarily modified through 4-trimethoxysilylbutyraldehyde, m-phenylenediamine-sodium sulfonate and triphosgene, the antibacterial and anti-dust effects can be achieved, then natural silk fibroin and collagen are used for further modification, performance is improved, meanwhile, the modified silicon dioxide can form a particle layer on the surface of natural latex, and the antibacterial and anti-dust effects are achieved. Modified silicon dioxide is used as a nucleating agent, and an interpenetrating network structure is formed through supercritical foaming, vulcanization, deblocking and crosslinking of the modified silicon dioxide and the nucleating agent, so that the mechanical property of the latex pillow is improved; according to the invention, after foaming, aromatic particles are doped, the sleep-aiding essential oil composition is fixedly loaded by using graphene aerogel microspheres, and cyclodextrin is used for encapsulation, so that the aromatic particles can release essential oil only when in use.

The invention discloses a composite forward osmosis membrane for removing micromolecular micropollutants and a preparation method of the composite forward osmosis membrane. The preparation method comprises the following steps: dissolving m-phenylenediamine, camphorsulfonic acid and triethylamine in a water phase; the preparation method comprises the following steps: dissolving trimesoyl chloride and tetramethoxysilane in an organic phase; fixing the base membrane on a flat plate, adding the aqueous phase solution, and then adding the organic phase solution; integrally transferring the obtained polyamide layer and the base membrane into a drying oven, and carrying out heat treatment to obtain the forward osmosis membrane. The nano-particles generated by the method are uniformly distributed, so that the agglomeration phenomenon is avoided, the uniformity of the membrane structure is ensured, and various properties of the membrane are more stable and uniform; the low reverse salt flux is guaranteed at the cost of sacrificing a certain degree of water flux, the method focuses on guaranteeing the high water flux and maintaining the low reverse salt flux at the same time, and the method is more suitable for actual production and application by maintaining the two properties within a proper range.

The invention relates to the field of heavy metal detection, in particular to a boron-doped carbon quantum dot and a preparation method and application thereof. In order to realize synchronous detection of dichromate radicals and permanganate radicals, curcumin and m-phenylenediamine are used as a carbon source and a nitrogen source, boric acid is used as a boron element doping agent, and the boron-doped carbon quantum dots are obtained by adopting a one-step solvothermal method. Wherein curcumin and m-phenylenediamine are used as precursors, boric acid is used as a boron element doping agent, and the boron-doped carbon quantum dots are synthesized. The preparation method is simple, and the prepared B-N-CDs has blue-green fluorescence, shows excellent biocompatibility and photobleaching resistance, is successfully applied to detection of Cr2O7 < 2-> and MnO4 <-> in water, is successfully applied to the field of fluorescent ink, and has potential value in the aspect of anti-counterfeiting marks.

The present invention provides a polyimide film comprising, as polymeric units, dianhydride monomers comprising pyromellitic dianhydride (PMDA), and diamine monomers comprising 4,4'-methylenedianiline (MDA), meta-phenylenediamine (MPD), 4,4'-diaminodiphenyl ether (ODA), and para-phenylenediamine (PPD), the tensile strength and percent elongation of the polyimide film being 180 MPa or greater and 90% or greater, respectively.

The invention discloses an ultra-high water permeability polyester reverse osmosis membrane based on an artificial water channel and a preparation method of the ultra-high water permeability polyester reverse osmosis membrane. The preparation method comprises the following steps: carrying out demethylation reaction on full-methoxylated phenyl extended calix [4] resorcinol aromatic hydrocarbon (Me-ExR4) to prepare a full-hydroxylated phenyl extended calix [4] resorcinol aromatic hydrocarbon (OH-ExR4) water channel, preparing an aqueous solution containing OH-ExR4 by taking OH-ExR4 as a water-phase monomer for interfacial polymerization, wetting the surface of a base membrane with the aqueous solution containing OH-ExR4, and carrying out surface modification on the surface of the base membrane so as to obtain the expanded calix [4] resorcinol aromatic hydrocarbon. And covering the surface of the base membrane with an n-hexane solution of trimesoyl chloride, and carrying out OH-ExR4 mediated acylation reaction to prepare the ultra-high water permeability polyester reverse osmosis membrane based on the artificial water channel. OH-ExR4 pore channels are used as main membrane pores of the polyester reverse osmosis membrane to induce chain transmission of water molecules, so that the membrane is endowed with ultrahigh water permeability. In the application amplification process of the ultrahigh water permeability polyester reverse osmosis membrane formula based on the artificial water channel, only the traditional m-phenylenediamine aqueous phase solution needs to be replaced by the OH-ExR4 aqueous solution, the whole membrane preparation process is not changed, and industrialization is easy.

The invention discloses a production process of high-wear-resistance asphalt concrete, and the asphalt concrete comprises the following raw materials: 70-90 parts of matrix asphalt, 5-8 parts of modified SBS resin, 5-8 parts of organosilicon epoxy resin, 2-3 parts of functional filler, 0.1-0.5 part of benzoyl peroxide, 0.5-1 part of m-phenylenediamine, 1000-1200 parts of sandstone aggregate and 80-120 parts of mineral powder. Materimide on the functional filler can be grafted with a modified SBS resin molecular chain, meanwhile, an epoxy group on the modified SBS resin molecule can be cross-linked with organic silicon epoxy resin, an organic silicon molecular chain segment has very high flexibility, and the flexibility is beneficial to dispersing stress, reducing stress concentration and forming a plurality of cross-linking sites, so that the cross-linking effect is improved, and the service life of the organic silicon epoxy resin is prolonged. The composite structure of the bamboo fibers and the polyhedral oligomeric silsesquioxane can protect the asphalt concrete from cracking, so that the service life of the asphalt concrete is greatly prolonged.

The present invention relates to ammonium salt solution, high iron diamine alician blue staining solution and its application, belong to the field of medical detection technology. A metal ion chelating agent is added to the ammonium salt solution of the present invention, because the metal ion chelating agent can chelate the metal ions in the solution, reduce the release of oxygen free radicals, suppress and slow down the color change reaction of N, N-dimethyl-p-phenylenediamine dihydrochloride, so as to better protect N, N-dimethyl-m-phenylenediamine dihydrochloride, improve the storage stability of ammonium salt solution, significantly improve the problem of color deepening or blackening when ammonium salt solution is stored for a long time. In addition, when the ammonium salt solution is used for high iron diamine alician blue staining solution, the staining effect of the staining solution in pathological tissue is not affected, and the background is clean and the staining specificity is good.

A method of preparing reverse osmosis membrane with double network of charged hydrogel and polyamide includes the steps of: (a) preparing an aqueous phase polymer solution containing m-phenylenediamine, polymer monomer with ionic group and crosslinking agent, and an organic phase polymer solution containing trimesoyl chloride and photoinitiator; (b) preparing a reverse osmosis membrane by inducing reaction of the aqueous phase and the organic phase polymer solution under ultraviolet light to form a charged hydrogel layer and a polyamide layer respectively; and (c) cleaning the membrane. The hydrogel layer not only enhances the electrical properties, thereby limiting the dissolution of ions in water on the membrane surface and the diffusion of ions in the membrane, and reducing the ions passing through the membrane, but also improves the hydrophilicity, which is beneficial to the transmission of water molecules within the membrane and the improvement of the anti-fouling performance of the membrane.