723 results about "Ammonium bromide" patented technology

The invention relates to the technical field of reverse osmosis membrane supports, in particular to a polyester non-woven fabric and a preparation method and application thereof.The preparation method comprises the steps that S1, polyester main body fibers and polyester adhesive fibers are used as raw materials to prepare high-quantitation original cloth M0 and low-quantitation original cloth H0; carrying out hot pressing pretreatment on the H0 to obtain a product H0 '; s2, overlapping and hot-pressing M0 and H0 'to obtain a composite non-woven fabric M1H1; s3, the M1H1 is impregnated with a functional solution, and the functional solution contains para-aramid nanofibers and nano calcium carbonate modified by hexadecyl trimethyl ammonium bromide; and then carrying out cold pressing on the composite non-woven fabric impregnated with the functional solution to obtain the nano-material modified composite non-woven fabric. And S4, carrying out secondary hot pressing treatment to obtain the polyester non-woven fabric. The polyester non-woven fabric can effectively avoid the problems of excessive curling, excessive permeation of a polysulfone solution and the like during curing after being coated with polysulfone, and is more beneficial to application in a reverse osmosis membrane.

The invention discloses a two-phase electrolyte, a preparation method thereof and a liquid energy storage battery system, and belongs to the technical field of electrochemical energy storage. According to the invention, a liquid-liquid double-phase electrolyte is composed of a water-phase electrolyte and an organic-phase electrolyte, wherein the organic-phase electrolyte contains a coupling system of 1-(methyl-decyl)-3-methylimidazolium bromide, tris (methyl-decyl) methyl ammonium bromide and (10-octadecyl) alkyl trimethyl ammonium bromide in a molar ratio of (5-7): (2-4): 1. During charging, positive electrode bromide ions are subjected to an oxidation reaction to generate a bromine simple substance, and meanwhile, the bromine simple substance and a coupling system of the quaternary ammonium bromide compound and the bromine complexing agent provided by the invention form a stable polybromine complex product, so that the polybromine complex product is prevented from being migrated into a water-phase electrolyte, and the purpose of improving the stability of the water-phase electrolyte in the absence of a diaphragm is achieved. The self-discharge reaction of bromine is significantly inhibited at a high temperature exceeding the boiling point temperature of bromine, the coulombic efficiency and energy efficiency of the liquid energy storage battery are improved, the system cost is reduced, and the long-term cycle stability of the liquid energy storage battery is improved.

The invention relates to the technical field of analysis and detection, in particular to a fluorescent switch sensor based on quantum dot-nano porphyrin and application. The specific technical scheme is as follows: the fluorescent switch sensor is constructed by utilizing cadmium telluride quantum dots modified by mercaptosuccinic acid and a 5, 10, 15, 20-tetra (4-nitrophenyl) porphyrin nano material modified by a cationic surfactant hexadecyl trimethyl ammonium bromide. And the method has a good enrichment effect on zearalenone. The sensor has high sensitivity, high selectivity and anti-interference performance, can accurately analyze trace zearalenone in actual grain samples (corn, rice, soybean and the like), and has the advantages of simplicity in operation, low detection limit, high sensitivity, low cost and the like.

4, 4 '-bipyridine (Bpy), 2, 5-thiophenedicarboxylic acid (Tdc), FeCl3. 6H2O, NiCl2. 6H2O, urea and tetrabutylammonium bromide are used as raw materials, a simple hydrothermal-calcination method is adopted to prepare the Fe2O3-coated Ni-MOF composite nanomaterial catalyst, X-ray diffraction (XRD), a scanning electron microscope (SEM) and a N2 adsorption and desorption technology are adopted to characterize a prepared sample, and the electro-catalytic oxygen evolution reaction (OER) activity of the Fe2O3-coated Ni-MOF composite nanomaterial catalyst is tested. Results show that compared with a single component, the activity of the composite nano-material catalyst is greatly improved, especially the composition-optimized Fe2O3-coated Ni-MOF-1 composite nano-material catalyst shows the highest catalytic activity, the composite nano-material catalyst catalyzes OER in 1M KOH, and the overpotential (eta 10) is only 330mV when the current density is 10mA / cm < 2 > and is close to the overpotential 291mV of a noble metal catalyst RuO2.

The invention discloses a recoverable high-barrier-property multilayer composite film and a preparation method thereof. The composite film adopts a five-layer symmetrical structure, namely a heat sealing layer, a first bonding layer, a blocking layer, a second bonding layer and a surface protection layer. Wherein the barrier layer is a montmorillonite modified ethylene-vinyl alcohol copolymer, and montmorillonite is modified by a carboxyl functionalized ammonium bromide intercalator; the bonding layer is maleic anhydride grafted polylactic acid; the heat sealing layer contains modified composite filler; the surface protection layer is a polyethylene / graphene modified coupling agent composite system. The preparation method comprises the steps of intercalation modified montmorillonite preparation, barrier layer material melt blending, five-layer co-extrusion casting, gradient hot pressing and curing treatment. The problems that a traditional high-barrier film is unrecyclable, the interlayer binding force is weak and the high-temperature stability is poor are solved, the ultrahigh barrier performance that the oxygen transmission rate is smaller than or equal to 0.5 cm < 3 > / (m < 2 >. 24 h) and the water vapor transmission rate is smaller than or equal to 1.0 g / (m < 2 >. 24 h) is achieved, and the mechanical property retention rate is larger than or equal to 85% after recycling and re-pelletizing.

The invention discloses a flame-retardant and self-repairing wood epoxy coating as well as a preparation method and application thereof, and belongs to the technical field of epoxy resin. The preparation method specifically comprises the following steps: (1) uniformly mixing vanillin, epichlorohydrin and tetrabutylammonium bromide, reacting, cooling, dropwise adding a NaOH aqueous solution, continuously reacting, washing, drying, precipitating and drying again to obtain bio-based epoxy resin for later use; (2) uniformly mixing methanol and hydrochloric acid, heating, carrying out condensation reflux, adding gamma-aminopropyltriethoxysilane, reacting, cooling, adding tetrahydrofuran, washing and carrying out vacuum drying to obtain polyhedral oligomeric silsesquioxane; and (3) dissolving polyhedral oligomeric silsesquioxane in the organic solvent, adding the bio-based epoxy resin, uniformly stirring, standing and curing to obtain the composite material. According to the invention, vanillin is used for constructing the epoxy resin containing imine bonds, so that the self-repairing and excellent flame-retardant properties of the epoxy resin are realized.

The invention relates to the field of shoe materials, and particularly discloses an EVA and PEBAX blended foaming material for shoes and a preparation method of the EVA and PEBAX blended foaming material. The EVA and PEBAX blended foaming material for the shoes is prepared from the following raw materials in parts by weight: 70 to 90 parts of EVA resin, 10 to 30 parts of PEBAX, 0.8 to 1.2 parts of dodecyltrimethylammonium bromide modified rectorite, 2 to 5 parts of a foaming agent, 0.5 to 2 parts of a foaming aid, 3 to 5 parts of filler, 2 to 4 parts of a reinforcing agent, 0.5 to 2 parts of a cross-linking agent, 0.6 to 3 parts of a lubricating agent and 1 to 4 parts of a compatilizer. The material for the shoes has the advantages of being high in tear strength, uniform in foaming, light in weight and small in permanent compression deformation.

The invention discloses a polyethylene composite geomembrane and a processing technology thereof in the field of geosynthetic materials. The polyethylene composite geomembrane is prepared from the following raw materials: high-density polyethylene, polyethylene grafted maleic anhydride, a nano montmorillonite / low-density polyethylene composite modifier, an antioxidant, a light stabilizer and a lubricant calcium stearate. Wherein the polyethylene grafted maleic anhydride is prepared by drying high-density polyethylene, mixing the dried high-density polyethylene with maleic anhydride, an initiator and an antioxidant, and performing melt extrusion through a double-screw extruder, so that the surface polarity is improved; the nano-montmorillonite / low-density polyethylene composite modifier is prepared by ultrasonically dispersing Na-montmorillonite, adding hexadecyl trimethyl ammonium bromide, stirring, centrifugally drying to obtain organic modified montmorillonite, mixing the organic modified montmorillonite with low-density polyethylene, performing intercalation reaction, and performing twin-screw extrusion and blending, so that the barrier property is enhanced. The processing technology comprises the steps of raw material mixing, twin-screw extrusion granulation and calendaring molding, and finally the polyethylene composite geomembrane with remarkably improved interface cohesiveness, weather resistance and barrier property is prepared.

The invention discloses a copper-clad plate material containing elastomer resin and a preparation method of the copper-clad plate material, and belongs to the technical field of new materials. The method comprises the following steps: mixing a styrene-butadiene-styrene block copolymer with polybutadiene rubber, adding nano-montmorillonite, and carrying out intercalation modification through hexadecyl trimethyl ammonium bromide to prepare nano-modified elastomer resin; the preparation method comprises the following steps: mixing polybutylene terephthalate with nano silicon dioxide, and carrying out surface modification by gamma-aminopropyltriethoxysilane and hexamethyldisilazane to obtain a resin matrix; mixing the two phases, adding citric acid, and carrying out microwave heating and high-shear dispersion to obtain a discrete material; carrying out hot pressing on the dispersion, adding polyurethane and polylactic acid, uniformly mixing, adding polydimethylsiloxane and sodium dodecyl benzene sulfonate, and curing to obtain a cured product; and coating the surface of the cured product with a nano-copper layer. The material has the characteristics of high peel strength, low dielectric loss, low water absorption and low thermal expansion, and is suitable for the field of high-speed low-loss copper-clad plates.

The invention relates to a platinum-zinc alloy supported nitrogen-doped porous multi-layer carbon material and preparation and application thereof, the carbon material takes a rod-like graded porous carbon nanomaterial as a carrier, and platinum-zinc alloy particles and zinc monatomic are jointly supported on the surface of the carrier; the preparation method comprises the following steps: S1, adding zinc acetate and hexadecyl trimethyl ammonium bromide into DMF (Dimethyl Formamide), carrying out ultrasonic treatment, adding into a polyacrylonitrile solution, and stirring; s2, performing electrostatic spinning on the obtained spinning precursor solution; s3, adding the obtained nanofiber into a zinc acetate dihydrate solution, then adding a dimethylimidazole solution, carrying out hydrothermal reaction, soaking the obtained product in a chloroplatinic acid methanol solution, and then carrying out freeze drying; and S4, heating carbonization is carried out under the protection of an inert atmosphere, then annealing and cooling are carried out, and the PtZn-Zn-N4-HPCNFs material is obtained. Compared with the prior art, the catalytic performance and the like in the reaction processes of oxygen reduction reaction (ORR), chlorine evolution reaction (CER) and the like can be effectively improved.

The invention belongs to the technical field of membrane separation, and particularly relates to a preparation method and application of a high-permeability polyamide reverse osmosis membrane. According to the invention, the problems of high energy consumption and poor water production quality caused by non-ideal flux and rejection rate of the current reverse osmosis membrane product are solved, tetrabutylammonium bromide and acyl chloride form ion pairs to reduce hydrophobicity, a hydrogen bond network of urea destroys a hydrophobic barrier of an organic phase, and migration of acyl chloride to a water phase interface is promoted; the eutectic solvent is adsorbed on a water phase interface to form a'catalytic microenvironment ', amido of an amine monomer is attracted to be close to the interface, and the concentration of a reaction area is increased. During reaction, tetrabutylammonium bromide enables an amine monomer to stably attack a transition state of acyl chloride through electrostatic interaction, and reaction activation energy is reduced; urea and sodium hydroxide in a water phase can be jointly used as an acid-binding agent to neutralize generated hydrochloric acid so as to prevent amido protonation inactivation. The method is simple to operate and suitable for large-scale production.

A method of carbon dioxide fixation includes contacting a covalent organic framework material with a co-catalyst and an epoxide in the presence of carbon dioxide to form a cyclic carbonate. The covalent organic framework material includes reacted units of a 2,4,6-trimethyl-1,3,5-triazine, reacted units of a 4,4′-biphenyldicarbaldehyde, and palladium nanoparticles. The reacted units of the 2,4,6-trimethyl-1,3,5-triazine and the reacted units of the 4,4′-biphenyldicarbaldehyde form a COF-701, where the palladium nanoparticles are on an outer surface of the COF-701. The co-catalyst is n-tetrabutylammonium bromide.

This invention discloses a method for preparing a high-temperature resistant, strongly basic anion exchange resin, belonging to the field of ion exchange resins. The method includes three steps: First, white spheres with a crosslinking degree of 6-10 undergo a chloromethylation reaction by sequentially adding zinc dichloride and tin tetrachloride to improve the uniformity of the chloromethyl group distribution in the chlorospheres; second, the chlorospheres undergo an etherification reaction using tetrabutylammonium bromide as a phase transfer catalyst, and the dropping rate of sodium methoxide solution is controlled to improve the etherification conversion rate; finally, the etherification product undergoes a quaternization reaction with a trimethylamine aqueous solution to obtain the strongly basic anion exchange resin. This invention, by selecting the degree of crosslinking and optimizing the catalyst addition method for chloromethylation and the sodium methoxide dropping rate for the etherification reaction, results in a more uniform distribution of quaternary ammonium groups in the resin, significantly improving the ion exchange capacity and high-temperature resistance of the resin.

The invention relates to the technical field of chemistry, in particular to a synthesis process of 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride, which comprises the following steps: by taking 4-fluoro-3, 5-dimethylbromobenzene as a raw material and hydrazine hydrate as a hydrazine source, matching with alkali such as potassium hydroxide, sodium hydroxide or potassium phosphate and the like, reacting at the temperature of 60-80 DEG C to obtain the 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride. The preparation method comprises the following steps: by taking copper or nickel source catalysts such as cuprous bromide, cuprous iodide, nickel salicylate and the like, N, N-bis (2, 6-dimethylphenyl) oxamide as a ligand, hexadecyl trimethyl ammonium bromide as a stabilizer and a dioxane-water mixed system as a solvent, reacting at 80-110 DEG C under the protection of nitrogen, separating a reaction mixed solution after the reaction is finished, and separating the reaction liquid to obtain the target product. And purifying to obtain a finished product of the 4-fluoro-3, 5-dimethyl phenylhydrazine hydrochloride. Therefore, the problems that the synthesis of the 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride is poor in safety, low in production efficiency, poor in environmental friendliness, small in substrate application range and the like are solved.

The present invention relates to the technical field of antibacterial materials, and in particular to an antibacterial material comprising black talc and manganese oxide, and a preparation method thereof. The antibacterial material comprising black talc and manganese oxide loaded on its surface, wherein the manganese oxide comprises Mn3O4 and MnOOH. The antibacterial material is obtained by loading manganese oxide on the surface of the black talc using potassium permanganate, urea, and hexadecyltrimethylammonium bromide as raw materials and employing a hydrothermal reaction in-situ synthesis method. The present invention utilizes the unique layered structure of black talc and synthesizes manganese oxide on the surface of the black talc using a liquid phase in-situ synthesis method. The crystal phase and morphology of the manganese oxide are controlled by adding black talc and regulating the synthesis temperature. This material not only improves the stability of the manganese oxide, reduces aggregation, and exhibits high antibacterial properties, but also enhances its biocompatibility, exhibits low cytotoxicity and low hemolytic properties, and is suitable for various biomedical applications.

The invention belongs to the technical field of scale inhibitors, and particularly relates to a slow-release scale inhibitor and a preparation method thereof.The preparation method comprises the steps that 3, 4, 5-allyl trihydroxybenzoate, itaconic acid, sodium hydrogen sulfite, methacryloyloxyethyl-n-hexadecyl-dimethyl ammonium bromide and deionized water are mixed, after water bath heating, an ammonium persulfate aqueous solution is slowly added, and the scale inhibitor is obtained after reaction; the preparation method comprises the following steps: dissolving agar in deionized water, adding polyethylene glycol modified sodium alginate and a scale inhibitor into the deionized water, stirring, dropwise adding into edible oil to obtain gel microspheres, adding the gel microspheres into a calcium chloride aqueous solution, slowly stirring, cross-linking, cleaning and drying to obtain the slow-release scale inhibitor. The hydrogel microspheres swell to slowly release the scale inhibitor, meanwhile, the released scale inhibitor is hydrolyzed in water, ester groups are slowly broken, polycarboxylic acid, 3, 4, 5-trihydroxybenzoic acid and hydroxyethyl-n-hexadecyl-dimethyl ammonium bromide are slowly released, and good scale inhibition and corrosion inhibition effects are achieved.

The invention provides a bio-based low-temperature curing powder coating and a preparation method thereof, and belongs to the technical field of powder coatings, and the bio-based low-temperature curing powder coating specifically comprises the following components in parts by weight: 65-75 parts of bio-based resin, 5-6 parts of triglycidyl isocyanurate, 0.05-0.15 part of tetrabutylammonium bromide, 8-12 parts of air glass beads, 4-6 parts of mica and 0.4-0.6 part of ethylene bis stearamide. 0.7 to 1.3 parts of flatting agent, 0.2 to 0.5 part of benzoin, 0.3 to 0.7 part of amide wax and 6 to 8 parts of pigment. The curing temperature of the bio-based low-temperature curing powder coating is 100-120 DEG C, and the bio-based low-temperature curing powder coating has the advantage of low curing temperature, can be suitable for surface coating of plastic devices, has the advantages of salt mist resistance, impact resistance and the like, and can effectively solve the problems of existing powder coatings.

A preparation method of a platinum-boron aluminum catalyst for dehydrogenation of methylcyclohexane comprises the following steps: step 1, taking aluminum nitrate nonahydrate, adding CTAB (cetyltrimethyl ammonium bromide), and pouring absolute ethyl alcohol into a beaker A; adding boric acid and deionized water into a beaker B, and pouring the solution in the beaker B into the beaker A; slowly dropwise adding ammonia water into the beaker A, then adding absolute ethyl alcohol, and aging; evaporating the solution in the beaker A, drying in a drying oven, and finally putting in a muffle furnace; preparing a B-O-Al carrier with a large specific surface area; step 2, putting the B-O-Al carrier with the large specific surface area and absolute ethyl alcohol into a beaker, then adding a chloroplatinic acid solution, then putting the beaker into ultrasonic waves for oscillation, and then putting the beaker into a drying oven for drying to obtain a Pt / B-O-Al (unreduced) catalyst; and putting the Pt / B-O-Al (unreduced) catalyst into a tubular furnace, and reducing the Pt / B-O-Al (unreduced) catalyst under the condition of H2 to finally obtain the Pt / B-O-Al catalyst. The catalyst has the characteristics that the low-temperature requirement is low, the sintering inactivation resistance is high, and high-efficiency, long-life and stable dehydrogenation can be realized under the low Pt loading capacity (1wt%).

The invention relates to the technical field of high-performance polyester, and discloses a modified preparation method of functionalized antibacterial polyester fibers, which comprises the following steps: S1, graphene is treated by oxygen-argon mixed plasma to obtain hydroxylated graphene; s2, after hydroxylated graphene is dispersed, cerium nitrate and sodium citrate are added, and cerium-based metallized graphene is obtained; s3, carrying out a reaction on the cerium-based metallized graphene and 3-(2-aminoethylamino) propyltrimethoxysilane, so as to obtain aminated graphene; s4, aminated graphene dicyandiamide, ammonium chloride tetraethoxysilane and hexadecyl trimethyl ammonium bromide are subjected to a reaction, and guanidyl-meso-porous silicon-metal composite graphene is obtained; s5, reacting the product with epsilon-polylysine and polycaprolactone to obtain a modified composite antibacterial agent; s6, treating the polyester fibers with a mixed solution of alkali and a surfactant; s7, the polyester fibers react with a solution containing an antibacterial agent, tetrabutyl titanate, an initiator and a dispersing agent, and a finished product is obtained.

The invention relates to the technical field of photocatalysts, in particular to a bismuth-defect bismuth oxybromide-sulfur-defect bismuth sulfide bromide heterojunction and a preparation method and application thereof in photocatalytic CO2 reduction, Bi (NO3) 3.5 H2O, thiourea, cetyltrimethylammonium bromide (CTAB) and the like are used as raw materials, and the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction is prepared through a two-step hydrothermal method. According to the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction, bismuth vacancies and sulfur vacancies are introduced, the visible light absorption range of the material is expanded through a proper amount of double vacancies, more electron capture centers are provided, and the separation efficiency of photo-induced electrons and the vacancies is improved, so that the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction has excellent performance of photocatalytic reduction of CO2, and the preparation method of the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction is suitable for large-scale production and application of the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction. CO2 can be reduced into a single product CO, and the photoreduction efficiency of the carbon dioxide can be improved.

The present invention discloses an aryl phosphonate compound and a preparation method thereof. In the present invention, under the protection of an inert gas, a phosphorus reagent, an R-OH reagent or a diphenol reagent is used as a starting material, trifluoromethanesulfonic anhydride, dimethyl sulfoxide and TBAB (tetrabutylammonium bromide) are added simultaneously in an organic solvent, and the phosphorus reagent, R-OH reagent or diphenol reagent, trifluoromethanesulfonic anhydride, dimethyl sulfoxide and TBAB are reacted at a reaction temperature of 80-120°C. o C for 9 to 15 hours, then the solvent is removed by rotary evaporation and the aryl phosphonate compound is obtained by column chromatography. The starting materials involved in the preparation method of the present invention are stable and readily available, the reaction is easy to operate, and the substrate compatibility is good. This method can synthesize a variety of aryl phosphonate compounds in a one-pot step.

The invention provides a pulse-direct current electrochemistry composite deposition process of a nickel-tungsten-phosphorus alloy coating, and belongs to the technical field of coating preparation, and the pulse-direct current electrochemistry composite deposition process comprises the following steps: carrying out silane coupling agent modification treatment on alpha-aluminum oxide; carrying out modification treatment on the hexagonal boron nitride nanosheet by adopting hexadecyl trimethyl ammonium bromide; carrying out polyacrylic acid modification treatment on the nano silicon dioxide; nickel salt, tungsten salt, phosphorus salt, a complexing agent, a buffering agent, a primary brightener, a secondary brightener, a wetting agent, modified aluminum oxide, modified boron nitride, modified silicon dioxide and deionized water are mixed, stirred and heated, and a composite plating solution is obtained; the substrate serves as a cathode, pulse current is applied to the substrate for pulse electroplating, then the current density of the pulse current is continuously and linearly reduced to a target value, and finally direct current electroplating is conducted under the target value; by optimizing the formula of the composite plating solution and the pulse-direct current composite electroplating process, the nickel-tungsten-phosphorus alloy composite plating layer with high hardness, low friction, high wear resistance and corrosion resistance is finally obtained.

The invention relates to the technical field of sewage treatment, in particular to an urban sewage treatment plant sludge deep dehydration conditioner and an application method thereof, and the urban sewage treatment plant sludge deep dehydration conditioner comprises the following raw materials: functional layered composite powder, cationic polyacrylamide, diatomite and sodium carbonate. After the functionalized layered composite powder and the bentonite are organically modified by the lauryl trimethyl ammonium bromide, the interlayer spacing is obviously increased, the hydrophobic property and the cation exchange capacity are excellent, negative charges on the surface of sludge colloid can be efficiently neutralized, a double-electrode-layer structure can be destroyed, and part of bound water can be released; ferric hydroxide deposited on the surface serves as amphoteric metal hydroxide, further compresses double electric layers through electric neutralization, forms an amorphous net structure and serves as a high-efficiency adsorption flocculation net to capture fine sludge particles; under the synergistic effect of the powder and cationic polyacrylamide, efficient removal of water combined with sludge and water in cells is achieved, and the dual purposes of deep dehydration and mud cake volume reduction are achieved.

The invention provides a fracturing fluid base fluid, a water-based fracturing fluid and a preparation method of the water-based fracturing fluid, and relates to the technical field of oil fields. The fracturing fluid base fluid is prepared from the following components in percentage by mass: 97.3 percent to 98.1 percent of produced water, 0.5 percent to 0.55 percent of hydroxypropyl guar gum, 0.004 percent to 0.005 percent of sodium hypochlorite, 0.015 percent to 0.03 percent of citric acid, 0.1 percent to 0.18 percent of dodecyl dimethyl benzyl ammonium bromide, 0.2 percent to 0.3 percent of ethylenediamine tetraacetic acid disodium salt, 0.3 percent to 0.5 percent of a temperature stabilizer, 0.6 percent to 0.8 percent of a pH value regulator and 0.2 percent to 0.3 percent of a cleanup additive; the pH value of the fracturing fluid base fluid is 7.5. The fracturing fluid base fluid prepared from the produced water has the advantages of rapid adhesion, no precipitation, no weak crosslinking and no floccule phenomenon, so that the guar gum fracturing fluid prepared from the fracturing fluid base fluid has the characteristics of self-adaption to a reservoir, ultralow damage and high performance.

The invention relates to the technical field of biology, in particular to a method for extracting PDRN from plants and application. In the preparation process, the casein is added, so that the casein and the PDRN are competitively combined with impurities in plants; enzyme is added for enzymolysis treatment, so that subsequent centrifugation and other operations are facilitated; the impurities are further removed by adding Tris-HCl, NaCl, CTAB (cetyltrimethyl ammonium bromide) and EDTA (ethylene diamine tetraacetic acid) and controlling each concentration. By adopting the method provided by the invention, the A260 / A280 of the PDRN extracted from the plant is greater than or equal to 1.69, the A260 / A230 is greater than or equal to 1.55, the PDRN has the advantage of high purity, and the obtained PDRN has the effects of resisting aging, repairing a barrier, resisting inflammation and the like, and has a good application prospect.

The invention provides a method for reversibly regulating and controlling the water solubility of long-chain alkyl trimethyl ammonium bromide, which comprises the following steps of: mixing sodium benzyl selenopropionate serving as an auxiliary agent with long-chain alkyl trimethyl ammonium bromide, adding water for dissolving, reducing the Krafft temperature of the long-chain alkyl trimethyl ammonium bromide to 10 DEG C or below, and then adding sodium benzyl selenopropionate, according to the method, benzyl selenium sodium propionate is oxidized into benzyl selenium oxygen sodium propionate by adding an oxidizing agent, so that the KT of long-chain alkyl trimethyl ammonium bromide is increased, and the water solubility of the long-chain alkyl trimethyl ammonium bromide is reduced, so that the long-chain alkyl trimethyl ammonium bromide is crystallized and separated out from an aqueous solution, and the separation, recovery and reutilization of the long-chain alkyl trimethyl ammonium bromide are realized; the residual water phase solution after the long-chain alkyl trimethyl ammonium bromide is recovered can be used as the plant leaf selenium fertilizer.

The invention provides a preparation method of a low-sulfur diesel oil anti-wear agent, and belongs to the technical field of carbon-containing fuel processing, and the preparation method comprises the following steps: adding sodium oleate, tetrabutylammonium bromide and xylene into a three-necked flask, uniformly stirring and mixing, heating, dropwise adding 3-chloro-1, 2-propylene glycol, continuously heating until reflux, centrifuging, and carrying out rotary evaporation to obtain glyceryl monooleate; the preparation method comprises the following steps: dispersing NCC in xylene, adding lauric acid and p-toluenesulfonic acid, and carrying out heating, reflux reaction, cooling, centrifugation, washing and drying under the protection of an inert atmosphere to obtain modified NCC; the preparation method comprises the following steps: heating and melting glyceryl monooleate, adding silane modified silicon dioxide, stirring, carrying out ultrasonic treatment, cooling to obtain a modified nano-composite, adding the modified NCC and a stabilizer, stirring, and carrying out ultrasonic uniform mixing to obtain the low-sulfur diesel oil anti-wear agent. The diesel oil anti-wear agent provided by the invention can improve the wear resistance of diesel oil under the condition that the addition amount is relatively low, and improve the low-temperature fluidity and demulsifying performance.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an adsorption particle electrode for wastewater and waste liquid treatment and a preparation method thereof. The preparation method comprises the following steps: adding a zinc salt, a vanadium salt, a scandium salt and cetyltrimethylammonium bromide into water, stirring, adjusting the pH value at 70-80 DEG C, continuously stirring, filtering, drying and calcining to obtain modified mesoporous zinc oxide; and dispersing the modified mesoporous zinc oxide in water, adding the composite aerogel, soaking, filtering, washing, drying and grinding to obtain the adsorption particle electrode. The adsorption particle electrode prepared by the invention can be used for degrading printing and dyeing wastewater, and has the excellent performances of high degradation rate, high degradation speed, reusability and the like.

The invention belongs to the technical field of metal material plating, and particularly relates to a connector surface composite coating and a preparation process thereof, and the preparation process comprises the following steps: adding modified carbon black and sodium molybdate into deionized water, stirring to obtain a corrosion inhibition material, and mixing with modified zinc oxide to obtain a mixed filler; the preparation method comprises the following steps: adding dibutyltin dilaurate and toluene diisocynate into polypropylene glycol to obtain a core material; adding hexadecyl trimethyl ammonium bromide and the mixed filler into a 93-96 wt% ethanol solution, adding the core material for emulsification, adding an isophorone diisocyanate solution, and stirring to obtain a microcapsule; nickel sulfate hexahydrate, nickel chloride hexahydrate, sodium citrate, boric acid, a surface dispersant, a sodium hydroxide solution and microcapsules are added into deionized water to be mixed, and an electroplating solution is obtained; and putting the connector into the electroplating solution for electroplating to obtain the composite coating. The expansion of pitting corrosion can be inhibited, and the long-term use reliability and stability of the connector in a marine environment are improved.

The invention discloses a fluorescent probe for detecting spermine and spermidine in a water sample and urine as well as a preparation method and application of the fluorescent probe, and relates to the technical field of supramolecular fluorescent probes, and the fluorescent probe is formed by reacting 14-membered cucurbit urils (tQ [14]) and a compound (E)-1-(4-boron benzyl)-4-(4-hydroxyl styryl) quinoline-1-ammonium bromide according to a molar ratio of 1: 1. The novel fluorescent probe provided by the invention can specifically detect spermine and spermidine in a water sample and urine, and the preparation method of the fluorescent probe is simple and easy to implement; the method for detecting spermine and spermidine in a water sample and urine by using the fluorescent probe has the advantages of high sensitivity, high selectivity, low cost, simple sample treatment, convenient operation, rapid determination and the like.