419 results about "Ammonium bromide" patented technology

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.

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 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.

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 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.

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 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 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.

The application provides a preparation method of a platinum-cobalt alloy catalyst, which comprises the following steps: preparing a hexadecyl trimethyl ammonium bromide clear solution; preparing a platinum compound, a transition metal cobalt salt and a dimethyl imidazole dispersion solution; adding the dispersion solution into the hexadecyl trimethyl ammonium bromide clear solution in sequence, stirring, adding a carbon black, a ketchen black, a cabot black or a carbon nanotube slurry, and continuously stirring to obtain a mixed solution I; then centrifuging, vacuum drying and grinding the mixed solution I to obtain an intermediate powder; then performing a different temperature staged calcination on the intermediate powder under a reducing / inert atmosphere to obtain an ordered low platinum-cobalt alloy catalyst powder; and then performing an acid washing, suction filtration, vacuum drying and grinding on the ordered low platinum-cobalt alloy catalyst powder to obtain a catalyst product which can be used in a fuel cell. The platinum-cobalt alloy catalyst prepared by the application can be applied to a proton exchange membrane fuel cell as a cathode oxygen reduction catalyst, and the platinum-cobalt alloy catalyst can improve the utilization rate, catalytic activity and durability of the noble metal Pt in the fuel cell cathode ORR catalyst, and can reduce the manufacturing cost and use cost of the fuel cell.

The invention discloses a monatomic / nitrogen-doped carbon sphere material and a preparation method and application thereof, and relates to the technical field of electrochemical detection.The preparation method comprises the following steps that glucose and hexadecyl trimethyl ammonium bromide are added into deionized water to be subjected to a hydrothermal reaction, and carbon spheres are obtained; mixing, grinding and calcining the carbon spheres and urea to obtain nitrogen-doped carbon spheres; and adding a metal salt solution into the nitrogen-doped carbon sphere suspension, stirring, filtering, washing, drying, and finally calcining in a nitrogen atmosphere to obtain the monatomic / nitrogen-doped carbon sphere material. The invention also discloses the monatomic / nitrogen-doped carbon sphere material prepared by the method and application of the monatomic / nitrogen-doped carbon sphere material in electrochemical detection of organic pesticides. According to the nitrogen-doped carbon sphere, the single metal atoms are anchored on the vacancies on the nitrogen-doped carbon sphere, so that the sensitivity, the detection limit, the selectivity, the stability and the anti-interference capability of the nitrogen-doped carbon sphere when the nitrogen-doped carbon sphere is used for electrochemical detection of organic pesticides are remarkably optimized, and the nitrogen-doped carbon sphere has important practical application value.

The application discloses a synthesis method of afugan, which comprises the following steps: 1-[3-chloro-5-(trifluoromethyl)phenyl]-2,2,2-trifluoroacetone and 4-acetylnaphthalene carboxylic acid are added into a solvent, a base is added, DMAP is added after complete reaction at 50-80 DEG C, acetic anhydride is added dropwise, tetrabutylammonium bromide is added after complete reaction, and an aqueous solution of sodium hydroxide and hydroxylamine hydrochloride is added, and reaction is carried out at 0-5 DEG C, so that an intermediate is obtained; the intermediate is reacted with acyl chloride under the action of DMF and dichloromethane, so that 4-(5-(3-chloro-5-(trifluoromethyl)phenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazole-3-yl)-1-naphthalene carboxylic chloride is prepared; 2-amino-N-(2,2,2-trifluoroethyl)acetamide hydrochloride and a dichloromethane solution of a base are added dropwise, and reaction is carried out at 0-5 DEG C, so that afugan is obtained. The method has a short route, high yield and suitability for large-scale industrial production.

This invention discloses a method for preparing and analyzing trans-4-aminocyclohexylacetic acid. The preparation method is as follows: 4-nitrophenylacetic acid undergoes catalytic hydrogenation in a solvent, followed by filtration. The filtrate is then treated with acid to obtain a 4-aminophenylacetic acid salt solution. The collected catalyst is activated. The 4-aminophenylacetic acid salt solution is mixed with isopropanol, barium hydroxide, tetrabutylammonium bromide, 18-crown ether-6, and dibutyl phthalate. The activated catalyst is then added to initiate a catalytic hydrogenation reaction. After the reaction, the reaction solution is cooled and filtered. The resulting solid is mixed with a preheated dilute sulfuric acid solution and stirred to form a slurry. The mixture is then filtered, and the filtrate is neutralized and filtered again. The collected filtrate is concentrated and crystallized. The crystallized precipitate is washed and dried to obtain trans-4-aminocyclohexylacetic acid. The method provided by this invention has high reaction efficiency, mild conditions, and is suitable for industrial production. It yields high product purity and reliability. Furthermore, the analytical method provided by this invention is accurate and reliable.

The application belongs to the technical field of dental antibacterial materials, and discloses a kind of nanometer composite antibacterial coating for dental material and preparation method thereof.Method: monomer modified arginine, monomer N-isopropyl acrylamide, monomer methyl hexyl acrylate, initiator azobisdimethylamino propanamide hydrochloride, dispersing agent cetyltrimethylammonium bromide and crosslinking agent N,N-methylene bis(acrylamide) are dissolved in water, and the reaction is carried out under protective atmosphere, dialysis, to obtain nanogel dispersion;The nanogel dispersion is mixed with the nanometer zinc oxide dispersion to obtain a nanogel composite zinc oxide antibacterial coating, and a coating is formed after coating.The nanometer composite antibacterial coating for dental material has excellent retention capacity and antibacterial performance.

The invention discloses a highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator for X-ray detection imaging and a preparation method of the highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator, and relates to the technical field of radiation detection and scintillation materials, the highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator comprises phenethyl ammonium bromide, cesium lead tribromide and ammonium thiocyanate, the molar ratio of the phenethyl ammonium bromide to the cesium lead tribromide to the ammonium thiocyanate is 2: 4: 2, the scintillator contains a methylamine thiocyanate additive which accounts for 0-1 equivalent weight of the dosage of the ammonium thiocyanate, and the scintillator is of a flaky polycrystal structure; the perovskite crystal of the polycrystalline wafer has a quasi-two-dimensional layered crystal structure, and each crystal grain is arranged in a height orientation manner, so that the layered crystal face is parallel to the main plane of the scintillator sheet. According to the highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator for X-ray detection imaging and the preparation method of the highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator, a highly-oriented layered structure is formed in the crystal, diffuse scattering of emergent light is greatly reduced, brightness uniformity and spatial resolution of X-ray imaging are improved, and a finer imaging effect is achieved.

This invention provides a photocatalytic composite nanoenzyme self-cleaning coating, its preparation method, and its application. Specifically, it includes: preparing solution A with Ca(NO3)2·4H2O and nano-cerium oxide; preparing solution B with (NH4)2HPO4 and hexadecyltrimethylammonium bromide; mixing solutions A and B, and reacting at high temperature to obtain cerium oxide nanoenzyme / hydroxyapatite microspheres; and using (NH4)6Mo7O... 24 Solution M is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solution N is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solutions M and N are mixed to obtain a precursor; the precursor is reacted with cobalt oxide at high temperature to obtain Co / Fe2(MoO4)3; tetraethyl orthosilicate, anhydrous ethanol, deionized water, and ammonia are mixed and sealed for aging; after adding a modifier, it is mixed with cerium oxide nanoenzyme / hydroxyapatite microspheres and Co / Fe2(MoO4)3, sprayed onto the obtained composite coating, and cured at high temperature to obtain a self-cleaning coating. This invention, by loading a photocatalyst and nanoenzyme / hydroxyapatite microspheres onto the surface of a modified SiO2 gel, effectively improves the photocatalytic activity and self-cleaning performance of the coating while maintaining good optical transmittance.

The invention relates to the technical field of oilfield chemistry, in particular to a self-crosslinking thickening agent and a preparation method thereof, the self-crosslinking thickening agent is obtained by copolymerization of acrylamide, acrylic acid, a physical crosslinking monomer and a chemical crosslinking monomer; the physical crosslinking monomer is N-cinnamyl-N, N-dimethyl hexadecyl ammonium chloride; the chemical cross-linking monomer is N-allyl-N, N-dimethyl p-benzaldehyde ammonium bromide, and the chemical cross-linking monomer is N-allyl-N, N-dimethyl p-benzaldehyde ammonium bromide; the molar ratio of the acrylamide to the acrylic acid to the physical crosslinking monomer to the chemical crosslinking monomer is (70-80): (15-25): (0.1-0.5): (0.1-0.5). According to the self-crosslinking thickening agent and the preparation method thereof, the thickening agent has good temperature resistance and salt resistance, meets the current oil and gas field development requirements, is reliable in method principle, easy and convenient to operate and mild in reaction condition, has wide market application prospects and can be widely applied to oil and gas resource development of high-temperature and ultrahigh-temperature reservoirs.

The application discloses a saline-alkali soil improvement method and belongs to the technical field of saline-alkali soil improvement. The method comprises the following steps: in a screw extruder, humic acid and acrylic acid are grafted and polymerized in a reaction section to form humic acid grafted acrylic acid polymer; N-[2-(2-methoxy-5-nitro-phenoxy)ethyl]pyridine, [2-(3,4-dichlorophenoxy)-ethyl]hexadecyl diethyl ammonium bromide and furfural residue are sequentially added at the opening of a conveying section, and after passing through a mixing section, the mixture is extruded and granulated to obtain a conditioner; according to weight parts, the furfural residue is 70-90 parts, the humic acid grafted acrylic acid polymer is 10-25 parts, and the N-[2-(2-methoxy-5-nitro-phenoxy)ethyl]pyridine and [2-(3,4-dichlorophenoxy)-ethyl]hexadecyl diethyl ammonium bromide are 1-5 parts. The conditioner is applied to saline-alkali soil by being scattered in the soil during ploughing or being applied to the soil by hole planting during sowing, so that the organic matter content of the soil can be increased, the saline-alkali components can be separated from the roots of crops, the stress of the saline-alkali soil on the crops can be effectively reduced, and the yield of the crops can be improved.

The invention discloses a Pt-coated ZrO2-coated SiO2 catalytic ceramic membrane with a core-shell structure as well as a preparation method and application of the Pt-coated ZrO2-coated SiO2 catalytic ceramic membrane, and belongs to the technical field of advanced oxidation and water treatment. The method comprises the following steps: preparing platinum nano sol by an ethylene glycol reduction method; the preparation method comprises the following steps: coating Pt-coated ZrO2 core-shell particles with tetragonal phase ZrO2; the preparation method comprises the following steps: preparing a porous SiO2 shell, dispersing the porous SiO2 shell in an ethanol solution, adding tetraethoxysilane (TEOS), coating the porous SiO2 shell through a Stber method by taking cetyltrimethylammonium bromide (CTAB) as a template agent and ammonia water as a catalyst, and then roasting to remove the template agent to form Pt-coated ZrO2-coated SiO2 core-shell particles; the preparation method comprises the following steps: uniformly dispersing Pt-coated ZrO2-coated SiO2 core-shell particles in absolute ethyl alcohol to obtain a suspension, dipping a commercial alpha-Al2O3 flat sheet membrane in the suspension, taking out, drying, and sintering in an air atmosphere to obtain the Pt-coated ZrO2-coated SiO2 catalytic ceramic membrane with the core-shell structure. The ceramic membrane is high in catalytic activity, good in stability and large in membrane flux. The invention is applied to advanced treatment of algae-containing water and degradation-resistant organic wastewater.

According to the ultrahigh-temperature low-viscosity shear strength improving agent for the water-based drilling fluid and the method, the ultrahigh-temperature low-viscosity shear strength improving agent is prepared from hexadecyl trimethyl ammonium bromide modified montmorillonite, magnesium nitrate hexahydrate and aluminum nitrate nonahydrate, and the obtained low-viscosity shear strength improving agent has good ultrahigh-temperature stability and can effectively stabilize rheological stability under the ultrahigh-temperature condition; and a net-shaped structure connected by polarized water chains is formed, so that the shearing force of the drilling fluid is improved, and the requirement of ultrahigh-temperature formation drilling is met.

The application belongs to the technical field of contaminated soil remediation, and particularly relates to modified montmorillonite for synergistically remediating heavy metals and organic pollutants in soil as well as a preparation method and application thereof. Hexadecyl trimethyl ammonium bromide (CTAB) and dodecyl trimethyl ammonium bromide (DTAB) are used as modifiers to prepare organic modified montmorillonite, and mercury ions (Hg 2+ ) and acetochlor (ACR) are used as representative substances of heavy metals and organic pollutants to study the effects of the two kinds of organic modified montmorillonite on remediation of Hg 2+ and ACR compound contaminated soil. The results show that the two kinds of organic modified montmorillonite have good removal effects on Hg 2+ and ACR in real soil samples, and can simultaneously remove Hg 2+ and ACR in soil. The removal rates of CTAB modified montmorillonite and DTAB modified montmorillonite can both reach more than 90%. The organic modified montmorillonite prepared by using CTAB and DTAB as modifiers can simultaneously remove Hg 2+ and ACR in soil, and can synergistically remediate Hg 2+ and ACR compound contaminated soil.

The invention discloses an anti-crack rheology modified functional material for a steel plate-concrete combined cable bent tower as well as a preparation method and application of the anti-crack rheology modified functional material. The anti-crack rheological modified functional material comprises a 1-10 [mu] m superfine light-burned magnesia expansion material, a 15-30 [mu] m medium-fine light-burned magnesia expansion material, a 30-100 [mu] m medium-coarse calcium expansion material, 0.1-2 [mu] m fly ash microspheres, 0.02-0.05 [mu] m nano-silica and an anti-agglomeration regulation and control material, wherein the anti-agglomeration regulation and control material is formed by compounding a zirconium aluminate coupling agent and cetyltrimethylammonium bromide; the anti-crack rheological modified functional material is applied to ultrahigh-strength steel plate-concrete combined cable bent tower structure concrete. The concrete prepared from the anti-crack rheology modified functional material prepared by the preparation method has low viscosity, good segregation resistance and volume stability, and the synergism and unification of concrete rheology modification and anti-crack expansion of an ultrahigh-strength steel plate-concrete combined cable bent tower structure are realized.

The application belongs to the technical field of lithium ion cylindrical batteries, and particularly relates to a negative electrode slurry, a preparation method thereof, a negative electrode sheet and a cylindrical battery. The negative electrode slurry comprises an active material, a conductive agent, a binder, a composite surfactant and water. The composite surfactant comprises an anionic surfactant and a cationic surfactant. Preferably, the anionic surfactant is one or more of sodium dodecyl sulfate SDS and sodium dodecyl benzene sulfonate SDBS. The cationic surfactant is one or more of cetyltrimethylammonium bromide CTAB and cetyltrimethylammonium chloride CTAC. The solid content of the negative electrode slurry is 9% to 60%. In the application, the anionic and cationic surfactants are compounded to form a composite surfactant which is introduced into the porous current collector negative electrode system. The electrostatic interaction between the anionic and cationic surfactants and the synergistic effect of the anionic and cationic surfactants are utilized, so that the obtained negative electrode sheet has better wettability, uniform morphology and no agglomeration.

The invention discloses a preparation method of a superfine PtIr nanowire catalyst for ammoxidation. The preparation method comprises the following steps: firstly, fully dissolving platinum acetylacetonate, iridium acetylacetonate, tungsten hexacarbonyl and dodecyl trimethyl ammonium bromide in oleylamine to obtain a light yellow solution; carrying out ultrasonic treatment on the obtained light yellow solution until the solution is fully dissolved; and heating the obtained uniform light yellow solution to 190 DEG C in an oil bath, keeping the temperature for 5 hours, centrifuging, washing and drying to obtain the superfine PtIr nanowire catalyst. The nanowire structure has a high specific surface area and abundant active sites, and is beneficial to effective quality and electron transmission. Through alloying of Ir and Pt, the electronic structure on the surface of the catalyst is changed, and the poisoning probability is effectively reduced. Meanwhile, the adsorption and activation process of ammonia molecules is optimized through the synergistic effect between Pt and Ir, the reaction activation energy is reduced, and the reaction rate is remarkably increased. The catalyst not only has remarkable ammonia oxidation catalytic performance, but also is good in stability and simple in preparation process.

The present application belongs to the field of petroleum chemical catalysis technology, and relates to a process for mass production of Ti-Beta zeolite based on local structure reconstruction method. The main technical features include: using water vapor assisted tetraethylammonium bromide template agent and alcohol amine weak organic base, and preparing Ti-Beta zeolite by local desilicon etching and repair reconstruction on the hydroxyl pit of dealuminated Beta zeolite. The benefits of the present application include: the combination of tetraethylammonium bromide template agent and alcohol amine weak organic base, and the limitation of the amount of silicate dissolved by the channel condensate liquid generated by dealuminated Beta zeolite and the liquid film on the surface of zeolite solid in saturated steam, which makes it easier to control the etching desilicon of the hydroxyl pit of dealuminated Beta zeolite and improves the receiving capacity of the hydroxyl pit to titanium ions with larger volume. The local structure defects generated by controllable etching desilicon can be directly repaired by using the quaternary ammonium cation provided by the TEABr template agent as a directing agent, so that the present application does not need to be assisted by fluoride or / and aluminum source.

This invention belongs to the interdisciplinary field of biomedical engineering, materials science, and tissue engineering, and discloses a multifunctional hydrogel with switchable mechanical and adhesive properties based on temperature triggering, its preparation method, and applications. The invention consists of acrylic acid, gelatin, hexadecyltrimethylammonium bromide, polydopamine nanoparticles loaded with silver nanoparticles, and water. This invention not only exhibits excellent adhesion and mechanical properties to skin tissue but also possesses switchable mechanical and adhesive properties, achieving durable and repeatable adhesion. The temperature-triggered hydrogel prepared by this invention is simple to process, low in cost, and introduces no toxic chemicals. It can achieve a close fit at body temperature and natural detachment at low temperatures, driven by temperature, and maintains excellent adhesion properties even in complex environments, thus promoting the development of intelligent medical multifunctional wound dressings.

The invention discloses a preparation method of a high-acrylic-acid-content polyacrylamide / acrylic acid copolymer emulsion for improving the recovery efficiency of a high-temperature and high-salt oil reservoir, and belongs to the technical field of oilfield chemistry and functional polymer materials. According to the method, a reversed-phase microemulsion polymerization system is adopted, a combination of a cationic surfactant hexadecyl trimethyl ammonium bromide and an amphiphilic initiator azodiisobutyronitrile is introduced, an electrostatic enrichment effect is generated at a water core interface, and acrylate anions are selectively adsorbed and locally concentrated, so that the reactivity rate of a monomer is regulated and controlled, and the amphiphilic polymer is prepared. And the grafting proportion of acrylic acid in the copolymer is obviously improved. The method is simple in process and mild in condition, and the obtained emulsion has the advantages of being high in solid content, good in storage stability, fast in dissolution, free of fisheye and the like, is suitable for high-temperature and high-salinity oil reservoir conditions and has good industrial application prospects.

The invention relates to the field of organic light-emitting materials, and mainly relates to a piezochromic organic light-emitting material and a preparation method and application thereof. A preparation method of the piezo-chromic organic light-emitting material comprises the following steps: synthesizing an intermediate; mixing the intermediate, 4-(diphenylamino) phenylboronic acid, tetrakis (triphenylphosphine) palladium, tetrabutylammonium bromide, alkali and a reaction solvent, and performing heating reaction to obtain a second mixture; and extracting, drying, concentrating and purifying the second mixture to obtain the piezochromic organic luminescent material. The piezochromic luminescent material disclosed by the invention has the characteristics of single force stimulation induction of multicolor change, piezoluminescence enhancement and crystalline phase-to-crystalline phase conversion function; the luminescent material also has the advantages of low raw material cost, simplicity and convenience in synthesis, wide application environment, multicolor reversible switching and high contrast ratio, is an excellent force stimulation response type luminescent material, and can be used for pressure detection, sensors, information storage devices, anti-counterfeiting materials, memory materials or biological probes.