50 results about "Octadecene" patented technology

The invention relates to a double-coordination passivated red-light perovskite quantum dot and a preparation method and application thereof. The preparation method comprises the following steps: preparing a monovalent cation precursor from cesium carbonate, 1-octadecene and oleic acid; preparing a lead source precursor from lead halide, zinc halide, 1-octadecene, diisooctyl hypophosphorous acid and oleylamine; thermally injecting the monovalent cation precursor into the lead source precursor, and cooling to prepare a perovskite quantum dot solution; performing anti-solvent purification on the perovskite quantum dot solution to obtain red light perovskite quantum dots; a process of preparing a double-coordination passivated red light perovskite quantum dot from the red light perovskite quantum dot and taurosulfonamide hydrochloride; the invention also discloses an application of the double-coordination passivated red light perovskite quantum dot prepared by the preparation method in preparation of an electroluminescent diode. The post-treatment passivation operation method is simple and convenient, and the quantum dot treated by the double-coordination ligand achieves the purpose of preparing the halide perovskite quantum dot with excellent optical performance and excellent performance of the prepared electroluminescent diode.

The application belongs to the technical field of optical materials, and particularly discloses a synthesis method of core-shell quantum dots based on surface activation, which comprises the following steps: S1, preparing a quantum dot core; S2, degassing reaction is carried out on zinc precursor, octadecene and oleylamine in proportion, then the quantum dot core obtained in S1 is injected, a metal alkyl compound is added, and the temperature is increased to 230-250 DEG C; S3, the shell precursor is injected for 3-4 times, the temperature is increased at the same time, the inner shell is grown, zinc stearate and TOP-S are injected again, the ZnS shell is grown, and the InP core-shell quantum dots with regular morphology are obtained. The synthesis method of core-shell quantum dots based on surface activation is adopted, the quantum dots with controllable morphology and size distribution are obtained, the method is suitable for industrial production, and has wide applicability.

The invention provides a Fe-Co-Ni series nano-alloy and a preparation method and application thereof, and belongs to the technical field of functional materials. The alloy is prepared by the following steps of: weighing and proportioning 0.5 mmol of each element by taking chlorate or acetylacetonate or acetate of iron, cobalt, nickel, manganese, copper, zinc and the like with the purity of more than 99.5% and other metal chlorides which are rich in earth surface and economical and practical as precursors, putting the precursors into a pressure-resistant bottle, taking n-trioctylphosphine oxide (TOPO) as a ligand, taking ethanol and 1-octadecene (ODE) as a mixed solvent, and uniformly stirring to prepare the alloy. And synthesizing the hexagonal nano-alloy at low temperature by using a wet chemical method. The method can be used for synthesizing 3-10-element medium-entropy and high-entropy alloy, and has a wide application prospect. The synthesis is a precise process which is guided by an organic ligand, is coordinated by multiple metals and is subjected to nucleation-self-assembly-anisotropic growth.

The invention relates to a high-crystallization mercury-based II-VI group nanocrystal synthesis method based on an octadecene-amine mixed solvent. The method comprises the following steps: providing a mercury-containing compound as a mercury source; providing a precursor solution capable of releasing II-VI group element anions; octadecene and an amine-containing surfactant are mixed in proportion to serve as a reaction solvent; injecting the precursor solution into a reaction solvent containing a mercury source in an inert atmosphere, and reacting under the condition that the temperature is lower than the thermal injection temperature to generate the mercury-based II-VI group nanocrystal with small size and higher crystal quality; and cooling and purifying the reaction product to obtain the target nanocrystal. By mixing the non-polar solvent and the amine surfactant, the concentration of the surfactant is reduced, the growth rate of the crystal is slowed down, the low-temperature controllable reaction is realized, the nanocrystal of which the particle size is 2-5nm and the crystal quality is remarkably improved is obtained, and the half-peak width of an X-ray diffraction pattern can be less than 0.7 degree (2 theta). The problems that the crystal size is difficult to control and the crystal quality is insufficient in a traditional method are solved.

The embodiment of the present application relates to the technical field of functional materials, and specifically discloses a CuInS2-In2S3 nano-heterojunction catalyst and a preparation method and application thereof, the CuInS2-In2S3 nano-heterojunction catalyst is prepared by using indium chloride, octadecene, oleylamine, sulfur powder and appropriate Cu 1.94 S nanocrystals as raw materials, nucleating In2S3 particles on the Cu 1.94 S nanocrystals through heating reaction, the catalyst has stable structure and stable product performance, exhibits good carbon dioxide reduction catalytic activity, and greatly improves the CO2 reduction product selectivity of CuInS2, thereby solving the problems that the product selectivity of CuInS2 is low in the CO2 reduction, and the small current density limits the catalytic activity and application in the catalytic process in the prior art. Moreover, the preparation method provided by the embodiment of the present application has high controllability, and is simple and efficient compared with the method in the prior art, and has a wide market prospect.

The present invention provides: a method for producing Fe2C nanoparticles, by which Fe2C nanoparticles are produced by a simple process by a one-step reaction; and a reduction catalyst which comprises Fe2C nanoparticles. The present invention relates to a method for producing Fe2C nanoparticles, the method including heating and mixing an iron carbonyl compound, a halide, a boron compound, and an alkylamine under an inert gas atmosphere, wherein the iron carbonyl compound comprises Fe3(CO)12 or Fe2(CO)9, the boron compound comprises a diboron compound that contains a heterocyclic ring represented by general formula (I) (wherein the description of the symbols is omitted), and 1-octadecene is not used. The temperature during the heating and mixing is preferably 80°C or higher and lower than 350°C. The time of the heating and mixing is preferably 2.5-50 hours.

This invention discloses a sex pheromone antagonist for the poplar leafminer moth and its application. The active ingredient of the sex pheromone antagonist is cis-13-octadecene-15-ynyl alcohol. The sex pheromone antagonist of this invention can interfere with the orientation of male poplar leafminer moths towards females, causing males to become disoriented, thereby reducing the probability of encounters between males and females, interfering with mating, reducing the reproductive rate, and gradually controlling the extinction of the pest population, thus achieving the purpose of pest control. This invention can significantly reduce the damage caused by the poplar leafminer moth and is also environmentally friendly.

The present invention relates to the compound 2-hydroxy-octadecene-9-cis-oate for use in the treatment of oncological pathologies including grade IV glioblastoma with native IDH, grade 3 glioma, embryonal tumour, pituitary tumour, meningioma, haemangiopericytoma, haemangioblastoma, mesothelioma, bile duct adenocarcinoma, exocrine pancreatic cancer, neuroendocrine pancreatic cancer, rectal cancer, urachal cancer, adenocarcinoma of the bladder and oesophageal cancer, and for the treatment of neuropathic pain caused by diabetic peripheral neuropathy, spinal cord injury, post-herpetic neuralgia, chemotherapeutic agent, antitumour agent, cancer, fibromyalgia or hepatitis. The present invention also relates to the pharmaceutical composition comprising 2-hydroxy-octadecene-9-cis-oate.

The application provides an antigen nanoparticle and a preparation method and vaccine preparation application thereof, and relates to the technical field of biotechnology.The antigen nanoparticle provided by the application comprises an antigen and poly( maleic anhydride-ALT-1-octadecene) grafted with polyethylene glycol, the antigen nanoparticle has good stability and high immunocompetence, and can be used for the preparation of a vaccine.The preparation method of the antigen nanoparticle provided by the application is convenient to operate, parameters are controllable, reproducibility is good, and the reaction is carried out in a water environment, the condition is mild, and the influence on the structure of the antigen is small.The vaccine provided by the application comprises the antigen nanoparticle and an adjuvant, and the inventor has found that the antigen nanoparticle and the adjuvant have a synergistic effect, and the combination of the two can further improve the immunization effect of the vaccine.

The invention discloses a preparation method and application of oleylamine grafted polyethylene, polyethylene is grafted with 9-octadecene amine (oleylamine) under the action of an initiator by adopting a melt blending method, the prepared oleylamine polyethylene graft and a small amount of stearic acid are added into a melt blended inorganic powder filled polyethylene system, and the oleylamine grafted polyethylene is prepared. On the basis of not carrying out pre-surface treatment on the inorganic powder material, the mechanical property of the composite material is remarkably improved, and the purposes of simplifying the technological process and improving the performance are achieved.

The invention relates to a preparation method of CdZnS / ZnSe / ZnS parabolic energy band structure quantum dots. The preparation method comprises the following steps: preparing an S-ODE precursor solution, an S-TOP precursor solution and a Se-TBP precursor solution; preparing a CdZnS core solution from cadmium oxide, zinc acetate, oleic acid, 1-octadecene and the S-ODE precursor solution; preparing a CdZnS / ZnSe solution from zinc acetate, oleic acid, 1-octadecene, the CdZnS core solution and the Se-TBP precursor solution; the preparation method comprises the following steps: preparing a CdZnS / ZnSe / ZnS parabolic band structure quantum dot solution from zinc acetate, oleic acid, a 1-octadecene CdZnS / ZnSe solution and an S-TOP precursor solution; according to the invention, efficient and stable pure blue light emission is realized through a preparation method of three-shell collaborative design of a CdZnS core, a ZnSe intermediate layer and a ZnS shell.

The application discloses molybdenum-doped nano zinc oxide with high visible light photocatalytic performance and a preparation method and application thereof. The molybdenum-doped nano zinc oxide is prepared from 1-octadecene, 1-dodecanol, oleic acid, a zinc source and a molybdenum source through vacuum degassing treatment, uniform stirring under a nitrogen atmosphere, heating to 100-140 DEG C, keeping warm until solid particles are dissolved, heating to 220-250 DEG C, keeping warm for 0.5-1 h of reaction, and cooling, washing and drying. The molybdenum-doped nano zinc oxide produces a local surface plasmon resonance absorption peak in the range of 600-700 nm through molybdenum ion doping, and the nano powder has a diameter of 5-20 nm; and the visible light photocatalytic performance of the zinc oxide material is greatly improved under the condition of visible light.

The invention discloses a quantum rod with stable chirality and a preparation method thereof.The preparation method of the quantum rod with stable chirality comprises the steps that zinc stearate is dissolved in octadecene under the high-temperature condition, a selenium source is added to form a Se-TOP solution, and a ZnSe core solution is successfully prepared; purifying the ZnSe core, and dispersing the ZnSe core in a TOP solution to obtain a ZnSe-TOP core mother solution; then, the ZnSe-TOP core mother liquor is added into a reaction solution composed of a Cd precursor and a sulfur precursor, epitaxial growth is carried out under the high-temperature condition, and ZnSe / CdS quantum rods with different length-diameter ratios are obtained; and carrying out ligand exchange reaction on chiral cysteine and the surface of the quantum rod to obtain the II-type chiral ZnSe / CdS quantum rod. The prepared II-type quantum rod has good optical performance and stable chiral effect, and the chiral optical effect is not affected by the space structure of the core / shell structure of the quantum rod.

The present application belongs to the technical field of catalysts, and particularly relates to a preparation method of a catalytic cracking reaction composite metal catalyst and application thereof in preparation of vinylidene chloride, the preparation method of the catalytic cracking reaction composite metal catalyst comprising the following steps: (1) mixing a chitosan solution with an acetic acid solution, adjusting pH to obtain a mixed solution, and then adding a zinc lactate solution into the mixed solution and mixing uniformly to obtain a zinc chelate solution; (2) mixing the zinc chelate solution, an aluminum-containing compound, a silicon-containing compound and a template agent to form a slurry, forming molecular sieve particles through spray granulation, crystallizing, washing and drying to obtain zinc-containing molecular sieve microspheres; (3) mixing cesium sulfate, oleic acid and octadecene to obtain a cesium oleate solution through a mixing reaction; and (4) dispersing the zinc-containing molecular sieve microspheres into the cesium oleate solution to react, and obtaining the catalytic cracking reaction composite metal catalyst. The present application optimizes process conditions in the preparation process, and forms a perfect catalytic system.

The invention relates to a heat-preservation heat-insulation high-pressure-resistant polypropylene material which comprises the following components in parts by mass: polypropylene resin, hollow glass fibers, modified nano ATO, hollow glass beads, an antioxidant, latex powder, a nucleating agent and a lubricant, wherein the modified nano ATO is a product obtained by carrying out MPS coupling on nano ATO and then carrying out copolymerization on the nano ATO, octadecene and acrylate. A long alkyl chain of octadecene is introduced into the modified nano ATO, the polarity of the modified nano ATO is similar to that of polypropylene, and the modified nano ATO and the polypropylene are arranged more tightly through intermolecular acting force and intertwining cross-linking between molecular chain segments; the modified nano ATO contains oxygen-containing groups such as ester groups and the like to form hydrogen-bond interaction with hydroxyl groups on the surfaces of the hollow glass fibers, so that the nano ATO simultaneously generates strong interaction with a polypropylene matrix and the hollow glass fibers, the modified nano ATO has excellent compatibility and stability with other components, and the mechanical properties such as pressure resistance and the like of the polypropylene material are remarkably improved.

The invention discloses a method for synthesizing lead-free Cu: CsBr perovskite (Cu: CsBr NCs) stable in an aqueous solution by using a one-pot method, which comprises the following steps of: selecting cesium carbonate, copper bromide and citric acid as reactants, and oleic acid and oleylamine as surface ligands, adding a proper amount of octadecene or mineral oil, performing ultrasonic treatment to obtain a Cu: CsBr-coated CC solution, and centrifuging, purifying and drying the solution to obtain the lead-free Cu: CsBr-coated CC perovskite (Cu: CsBr NCs) stable in the aqueous solution. Cu: CsBr (at) CC powder is obtained. The method disclosed by the invention is simple to operate, short in time and good in repeatability, can be synthesized by only one step, and the prepared compound is good in solubility in an aqueous solution, excellent in dispersity, stable in fluorescence and easy to store.

The invention is applicable to the technical field of materials, and provides a customized lead selenide quantum dot preparation method, which comprises: preparing a lead oleate precursor and a trioctylphosphine-selenium precursor in advance; the temperature of the lead oleate precursor in the first reaction container is stabilized to 170-250 DEG C, after the trioctylphosphine-selenium precursor is injected, the temperature is reduced to 135-215 DEG C, and meanwhile, a second reaction container containing octadecene is heated to the same temperature; transferring the thermocouple and the heating jacket of the container II to the container I, keeping the temperature at 135-215 DEG C, reacting for 15 minutes, adding methylbenzene, and quenching in an ice-water bath; and after subpackaging the product, carrying out centrifugal purification twice by using methanol / ethanol, trichloromethane and acetone to obtain the lead selenide quantum dot with the adjustable luminescence peak position of 1200-2500nm. Continuous adjustment of the spectrum and the half-peak width can be achieved, PLQY can be improved by adding phenylethyl ammonium chloride, uniform particle size is guaranteed through the double-container design, operation is easy, convenient and repeatable, the material can be excited by multiple wavelengths, and the method is suitable for the field of optical devices.

The present application relates to a kind of sulfonate ligand modified perovskite quantum dots, belong to perovskite quantum dot technical field.It includes the following steps:S1: cesium source, octadecene and oleic acid are mixed, vacuum drying is carried out, inert gas is passed and heated, and first mixed solution is obtained;S2: lead bromide, octadecene, oleylamine, oleic acid and octylamine methyl sulfonate are mixed, vacuum drying is carried out, under inert gas heating, first mixed solution is further added, after reaction, quenching, purification, and the solution of the sulfonate ligand modified perovskite quantum dots is obtained.The present application uses octylamine methyl sulfonate multi-ligand to passivate perovskite quantum dots in the process of quantum dot preparation, effectively reduces the vacancy defects caused by the increase of surface area due to the size reduction in the process of quantum dot synthesis, strengthens the combination between ligand and quantum dot, makes the particle size of quantum dot more uniform, and further improves the luminescent performance and stability of perovskite quantum dots.

The invention relates to the technical field of wire and cable manufacturing, and discloses a crosslinked polyethylene insulated cotton covered wire with a low-temperature frost crack prevention function. An insulating layer of the crosslinked polyethylene insulated cotton covered wire comprises linear low-density polyethylene, an ethylene-1-octene copolymer elastomer, porous linear low-density polyethylene carrier resin, a fluorine-containing polymer processing aid and a homogeneous active mixed solution. The homogeneous active mixed solution is composed of vinyl silane, 1-octadecene, high vinyl liquid polybutadiene, an initiator and the like, and is adsorbed in porous carrier resin to prepare a dry silane master batch. All the components are subjected to melt grafting in a double-screw extruder and are formed through coating curing and crosslinking treatment. According to the invention, 1-octadecene and polybutadiene are introduced to construct a flexible cross-linking node, and the physical confinement of the carrier resin and the high-pressure closed foam inhibition process of the extruder are combined, so that the insulating layer has the brittle fracture resistance at-40 DEG C, and meanwhile, the high-temperature dimensional stability and low dielectric loss characteristics are maintained.

This invention discloses a method for preparing an ultrathin zinc indium sulfide / zinc selenide heterojunction photocatalyst: Step 1, a certain amount of ZnCl2, InCl3·4H2O and oleylamine are mixed and subjected to a first deoxygenation treatment. A mixed solution of 1-dodecanethiol and tert-dodecylmercaptan is rapidly injected under nitrogen conditions and reacted at a certain temperature for a certain time to obtain ultrathin zinc indium sulfide nanosheets. After centrifugation and washing, the nanosheets are redissolved in a certain amount of n-hexane. Step 2, zincacetate, oleic acid and 1-octadecene are mixed and subjected to a second deoxygenation treatment. The mixture is then heated to a certain temperature under nitrogen conditions, reacted for a certain time, and cooled. A certain amount of the solution obtained in step S1 is rapidly injected and subjected to a third deoxygenation treatment. The mixture is then heated under nitrogen conditions, and a certain amount of a mixed solution of Se and TOP is slowly injected at a certain rate. The mixture is then kept at a certain temperature and reacted for a certain time. After the injection process is completed, the reaction is allowed to continue. Finally, the solution is cooled to room temperature and centrifuged to obtain ZIS / ZnSeHNSs.

This invention discloses a sex pheromone of the rice leaf folder (RLM) ester-based biotype, its preparation and application as a lure, and the pheromone comprises a mixture mainly composed of acetates, with the main components being cis-11-hexadecene acetate (Z11-16:Ac), cis-11-octadecene acetate (Z11-18:Ac), and cis-13-octadecene acetate (Z13-18:Ac). The novel RLM pheromone proposed in this invention plays an important role in the RLM population, and its distribution is influenced by geographical and seasonal factors. This discovery confirms the significant geographical population differentiation of the rice leaf folder and provides important guidance for optimizing the selection and application of sex pheromone lures in regional monitoring and early warning, improving forecast accuracy, and enhancing the effectiveness of swarm trapping and control.

The present invention provides: a method for producing iron phosphide nanoparticles, which is simple and is highly safe to the human body, wherein iron atoms in iron phosphide nanoparticles obtained by this method are in a low valence state and the iron phosphide nanoparticles are stable under atmospheric conditions; a composite body containing the iron phosphide nanoparticles obtained by the method; and a reductive amination catalyst using the same. The present invention relates to a method for producing iron phosphide nanoparticles, in which a phosphorus compound, an iron carbonyl compound, and a surfactant are mixed under heat, wherein the iron carbonyl compound is Fe3(CO)12, and 1-octadecene is not used.

The invention relates to a water-soluble manganese-doped titanium dioxide nanorod as well as a preparation method and application thereof, and belongs to the technical field of nano material preparation. The preparation method of the water-soluble manganese-doped titanium dioxide nanorod comprises the following steps: adding titanium tetrachloride into oleic acid to prepare a titanium oleate compound precursor; dissolving manganese oleate in oleic acid, carrying out ultrasonic treatment, adding the titanium oleate compound precursor, and continuously carrying out ultrasonic treatment to obtain a titanium oleate and manganese oleate compound precursor; the preparation method comprises the following steps: taking a compound precursor of titanium oleate, adding a mixed system of oleylamine, oleic acid and octadecene, injecting the compound precursor of titanium oleate and manganese oleate to obtain an oil-soluble manganese-doped titanium dioxide nanorod, and carrying out water-soluble surface modification through sodium citrate to obtain the water-soluble manganese-doped titanium dioxide nanorod. The nanorod prepared by the invention can be used as an excellent T1 magnetic resonance molecular imaging contrast agent, and has important application value and wide application prospect in the biomedical imaging fields of tumor detection, angiography and the like.

The invention provides a preparation method and oxygen evolution application of a transition metal doped sulfur catalyst, and relates to the technical field of catalysts.The preparation method comprises the following steps that S1, ferric acetylacetonate, cobalt acetylacetonate, nickel acetylacetonate and molybdenum acetylacetonate are mixed according to the amount of substance of 0.5-4 mmol, and a first mixture is obtained; s2, adding the first mixture into a polytetrafluoroethylene reaction kettle lining containing 15-100 mL of octadecene, uniformly mixing, and adding n-dodecanethiol and oleylamine to obtain a second mixture; wherein the addition amount of the n-dodecanethiol is 5 to 10 mL, and the addition amount of the oleylamine is 5 to 10 mL; s3, putting the second mixture into a 50-100mL reaction kettle, carrying out primary reaction for 6-12 hours at the temperature of 180-250 DEG C, putting foamed nickel of 2cm * 2.8-5cm * 5cm, and carrying out secondary reaction for 2-12 hours at the temperature of 180-230 DEG C; and S4, after the reaction is finished, washing the surface of the foamed nickel with n-heptane and ethanol, and carrying out vacuum drying to obtain the supported catalyst FeCoMo-Ni3S2 / NF with a black surface. According to the invention, the area amplification preparation of the catalytic material from a laboratory sample to a small test scale can be realized.

The invention belongs to the technical field of nano materials and biological catalysis, and particularly relates to a preparation method of cerium atom doped palladium particle nano enzyme. The method comprises the following steps: uniformly mixing palladium chloride and cerium chloride which are used as metal precursors, phloroglucinol which is used as a reducing agent and a mixed solution of oleylamine and octadecene which is used as a solvent and a dispersion medium, carrying out high-temperature reaction in a closed reaction kettle, and centrifuging, washing and drying a reaction product to obtain the Ce atom-doped Pd nano-particles with waxberry-shaped morphology. According to the invention, Ce is embedded into a Pd lattice in an atomic-scale dispersion form, and most of Ce is located at the junction of the Pd (111) and Pd (100) crystal faces to form a d-f orbital hybrid structure, so that the electron transfer ability of the material is significantly enhanced. The prepared nano-enzyme has excellent catalase-like activity and oxygenase-like activity at the same time under the weak acid condition, the activity of the two enzymes can be efficiently cascaded, and the catalytic activity is remarkably improved compared with that of the nano-enzyme without Pd doping.

The present invention relates to the compound 2-hydroxy-octadecene-9-cis-oate for use in the treatment of oncological pathologies including grade IV glioblastoma with native IDH, grade 3 glioma, embryonal tumour, pituitary tumour, meningioma, haemangiopericytoma, haemangioblastoma, mesothelioma, bile duct adenocarcinoma, exocrine pancreatic cancer, neuroendocrine pancreatic cancer, rectal cancer, urachal cancer, adenocarcinoma of the bladder and oesophageal cancer, and for the treatment of neuropathic pain caused by diabetic peripheral neuropathy, spinal cord injury, post-herpetic neuralgia, chemotherapeutic agent, antitumour agent, cancer, fibromyalgia or hepatitis. The present invention also relates to the pharmaceutical composition comprising 2-hydroxy-octadecene-9-cis-oate.

The invention provides an InAs nanowire and a preparation method and application thereof.The preparation method comprises the steps that organic acid and octadecene are mixed, heated and kept for a period of time, and a mixed solution A is obtained; mixing an indium source, an arsenic source and dibenzyl ether, and continuously mixing with the mixed solution A to obtain a mixed solution B; heating the mixed solution B, and adding oleylamine to obtain a mixed solution C; and heating the mixed solution C, and reacting to obtain the InAs nanowire. According to the method, the InAs nanowire with good crystallinity, good photoelectric property and a bending structure is successfully synthesized by using a colloid method under the condition of not introducing an exogenous metal catalyst for the first time, the reaction operation is simple, and the reaction temperature is far lower than that of a traditional gas phase synthesis method. The invention also successfully constructs a high-response photoelectric detector based on the InAs nanowire material, and the device is simple in structure and good in performance, and has excellent response in visible light and near-infrared bands.

The invention discloses a lead sulfide quantum dot and a preparation method thereof.The preparation method of the lead sulfide quantum dot comprises the following steps that lead oxide, oleic acid and octadecene are adopted for preparing a lead precursor solution; preparing a sulfur precursor solution from hexamethyldisilazane and octadecene; a lead precursor solution, a sulfur precursor solution and octadecene react through a microfluidic device to prepare the lead sulfide quantum dots. According to the preparation method disclosed by the invention, the micro-fluidic chip is innovatively utilized, and the flow velocity of the precursor solution is adjusted through the injection pump, so that accurate control on the reaction time is realized; the concentration of the precursor solution is accurately regulated and controlled to ensure that the reaction is fully carried out; meanwhile, the heating unit is used for carrying out constant-temperature heating control on the micro-fluidic chip to ensure the stability of the reaction temperature, so that the preparation of the lead sulfide quantum dots is accurately controlled in real time, and the prepared lead sulfide quantum dots are uniform in size distribution, high in quantum efficiency and repeatable.

The application discloses an environmentally-friendly anti-interference marine cable and a preparation method thereof, and relates to the technical field of power cables. The aldehyde group of 4-mercapto benzaldehyde is subjected to condensation reaction with the amino group of 2-isopropenyl aniline to generate an unsaturated antioxidant monomer; the carboxyl group of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid is subjected to esterification reaction with the hydroxyl group of 9-octadecene-1-ol to generate a hydrophobic modified hindered phenol monomer; then, the mercapto group of the unsaturated antioxidant monomer is subjected to click reaction with the double bond of the hydrophobic modified hindered phenol monomer to generate an antioxidant stabilizer, so that the synergistic antioxidant effect is achieved, and the hydrophobic structure makes the surface of the insulating layer hydrophobic, so that the performance decline caused by the penetration of seawater salt mist during use is prevented; finally, the antioxidant stabilizer, a crosslinking agent, a flame retardant, polyethylene and a heat-conducting filler are combined to melt and extrude an insulating layer composite conductor, a filling layer, a shielding layer and a protective layer to prepare the cable, so that the high insulation and anti-interference effects are achieved.

The application discloses a method for preparing CdSe nanocrystals, comprising the following steps: S1, dispersing selenium in 1-octadecene by using an ultrasonic dispersion method to obtain Se-SUS; S2, obtaining a Cd precursor mixture, bubbling and heating the Cd precursor mixture; S3, rapidly injecting the Se-SUS into a three-necked flask to grow small-size CdSe nanocrystals; S4, preparing large-size CdSe nanocrystals by using a step-by-step growth method, adding oleic acid into the Se-SUS prepared in S1 to obtain Se-OA-SUS, rapidly injecting the Se-OA-SUS into the three-necked flask in batches and continuing to grow for 10 minutes; S5, adding oleylamine and continuously reacting for 10 minutes to stabilize the size of the CdSe nanocrystals with poor size distribution; and S6, in-situ purification. The application can provide a reference for the application of the CdSe QDs in in-vivo imaging and multi-color labeling.