2207 results about "Nanoparti cles" patented technology

The invention belongs to the technical field of aerogel materials, and particularly relates to high-performance antistatic aerogel for 3D printing as well as a preparation method and application thereof. According to the invention, inorganic hollow nanoparticles are selected as a nucleating modifier for in-situ polymerization of aniline monomers in a polyamide solution, so that polyaniline-coated inorganic hollow nanoparticles are uniformly dispersed in polyamide, and the aerogel composite material with polyamide as a continuous phase and polyaniline-coated inorganic hollow nanoparticles as a conductive and reinforced phase is formed. The use of the hollow inorganic nanoparticles avoids the problem that the solid inorganic nanoparticles lose the characteristics of the inorganic nanoparticles due to high specific gravity and high surface energy, and easy agglomeration or adsorption with other substances in the preparation process of the solid inorganic nanoparticles. The inorganic hollow nanoparticles are adopted as a nucleating modifier, so that the problems of agglomeration of solid nanoparticles and dispersion in a polyamide matrix are well solved.

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) detection, and particularly relates to a preparation method and application of an Ag-coated NiFe2O4 composite SERS substrate. The preparation method comprises the following steps: firstly, preparing Ag nanoparticles which are uniformly distributed and have the same size through a sodium citrate reduction method; secondly, a nanometer flower type NiFe2O4 material is prepared through a hydrothermal method and a calcination method; and finally, the novel SERS substrate Ag-coated NiFe2O4 is prepared through a physical stirring method. The novel SERS substrate made of the Ag nano particles and the nano-flower type NiFe2O4 material is constructed, and compared with a conventional SERS substrate made of independent Ag nano particles, the SERS substrate can detect stronger intrinsic Raman signals of probe molecules. As the SERS substrate needs to be compounded with a nano-flower type NiFe2O4 material during preparation, a charge transfer phenomenon can occur at an interface where the SERS substrate is in contact with probe molecules, so that intrinsic Raman signals of the probe molecules can be enhanced, and the SERS substrate can be better used for detecting and analyzing chemical substances.

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) detection, and particularly relates to an Ag-MoO2 composite SERS substrate as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing Ag nanoparticles which are uniformly distributed and have the same size by a sodium citrate reduction method; secondly, a MoO2 material is prepared through a hydrothermal method; and finally, the novel SERS substrate Ag-MoO2 is prepared through a physical stirring method. According to the invention, the novel SERS substrate made of Ag nanoparticles and MoO2 materials is constructed, which is different from the conventional SERS substrate made of independent Ag nanoparticles, and can detect stronger intrinsic Raman signals of probe molecules. As the SERS substrate needs to be compounded with a MoO2 material during preparation, a charge transfer phenomenon can occur at an interface where the SERS substrate is in contact with probe molecules, so that intrinsic Raman signals of the probe molecules can be enhanced, and the SERS substrate can be better used for detecting and analyzing chemical substances.

The invention provides an electrochemical biosensor based on a nanoparticle modified multilayer porous membrane and application of the electrochemical biosensor. The nano particle modified multilayer porous membrane is composed of a plurality of modified nano particles among membranes with nano pore channels. The electrochemical biosensor constructed based on the nanoparticle modified multilayer porous membrane has the following advantages: (1) good conductivity and stability; and (2) multiple capture probes are modified on the surfaces of the nano pore channels of the multi-layer porous membrane, so that multiple different targets can be respectively detected, and multiple different targets can also be detected at the same time. And (3) enzyme-free double-target sensitive normal-temperature amplification-free detection can be carried out. (4) preparation steps are simple, consumed time is short, and operability is high; and (5) the sensitivity and the specificity are high.

The invention discloses a high-entropy nanoparticle catalytic material with a metal atom shell structure and a preparation method of the high-entropy nanoparticle catalytic material, and belongs to the technical field of preparation of catalytic materials. The preparation method comprises the following steps: dispersing a metal salt and a nanofiber precursor in an organic solvent, and carrying out electrostatic spinning to obtain a nanofiber membrane; and then calcining and pre-oxidizing the nanofiber membrane, and then carbonizing and calcining to obtain the nanofiber membrane. Wherein the selection principle of the metal salt is as follows: (n-1)-(n-2) metals are selected as an alloy substrate, and the sum of the mixing enthalpy of elements of the alloy substrate is not greater than-5kJ mol <-1 >; one or two metal elements serve as a precipitated phase, and the sum of the mixing enthalpy of the metal elements of the precipitated phase and the elements of the alloy substrate is larger than 20 kJ mol <-1 >; the high-entropy nanoparticle catalytic material obtained by the method shows relatively high catalytic activity and stability, and the method has wide universality.

The invention relates to the technical field of drilling fluid cooling, and discloses a phase change microcapsule suitable for drilling fluid cooling and a preparation method thereof.The phase change microcapsule comprises a capsule wall stabilizing material and a capsule core phase change material, and the capsule wall stabilizing material comprises polyurethane, polyurea, polyamide, polyimide, polystyrene and a first organic solvent; the capsule core phase change material comprises paraffin, fatty acid, polyol, inorganic hydrated salt, polymer gel, expanded graphite, carbon nanotubes, metal nanoparticles and a second organic solvent, and the first organic solvent is at least one of toluene, xylene, cyclohexanone and the like. The temperature of the drilling fluid is kept at a relatively low level, the cooling of the drilling fluid is realized, so that the drilling efficiency is improved, harmful solvents and additives are not used in the preparation process of the phase-change microcapsules, the phase-change microcapsules are pollution-free to the environment, and the requirements of greenness and environmental protection are met.

This case relates to a self-healing optical film and its preparation method. The optical film is made by adding a nanoparticle suspension to PET masterbatch as the main material during its melt extrusion process, resulting in a cast sheet. After biaxial stretching, a self-healing coating liquid is coated online, followed by shaping and cooling. The nanoparticle suspension includes nano-titanium oxide, MAH-PET polymer, ATO nanoparticles, and titanate coupling agent. The self-healing coating liquid is produced by core-shell emulsion polymerization, forming a nano-silica hard core and an acrylate functional monomer polymer soft shell. This invention adds the nanoparticle suspension by in-situ feeding in the middle of the extruder, reducing steps, improving dispersion uniformity, and making the film surface smoother. Then, the self-healing coating liquid is applied online after longitudinal stretching and before transverse stretching, forming a film on the film surface, improving the hardness and scratch resistance of the film material, enabling rapid self-healing at room temperature, strong stability, and avoiding the occurrence of rainbow patterns.

The present disclosure provides bispecific stealth lipid nanoparticle (LNP) compositions engineered to target specific tissues or cell-types, e.g., immune effector cells such as T cells, B cells, natural killer cells, and dendritic cells, to modify the cells with therapeutic nucleic acid encapsulated in the LNP. The present disclosure also provides compositions and methods of making the LNPs and treatment using the same.

The invention relates to a double-color magnetic nanoparticle imaging method based on a single-harmonic system matrix, which comprises the following steps: respectively moving two different types of magnetic nanoparticle samples to a central zero magnetic field point, applying a scanning magnetic field to enable the zero magnetic field point to scan the whole imaging field of view, applying an excitation magnetic field to magnetize magnetic nanoparticles, and applying an excitation magnetic field to magnetize the magnetic nanoparticles; acquiring magnetization frequency spectrum signals of the two magnetic nanoparticle samples; the method comprises the following steps: constructing single harmonic system matrixes A1 and A2 based on single harmonic of magnetization spectrum signals of two kinds of magnetic nanoparticle samples; measuring a to-be-measured object formed by the two kinds of magnetic nanoparticles to obtain a measurement magnetization signal U; transversely splicing the single harmonic system matrixes A1 and A2 of the two different types of magnetic nanoparticles to obtain a new single harmonic system matrix A; the concentration distributions c1 and c2 of two different types of magnetic nanoparticles are obtained by combining a new single-harmonic system matrix A with a measurement magnetization signal U, and the concentration distributions of the two different types of magnetic nanoparticles are respectively sent into different color channels to be displayed in different colors. The method has important significance in promoting the application of the magnetic nanoparticle imaging technology in clinical medicine.

The invention provides a method for providing composite luminescent particles, comprising: (a) providing (i) a luminescent material, comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor, wherein A comprises one or more of yttrium, lutetium, gadolinium, lanthanum; B comprises one or more rare earth elements; C comprises one or more of aluminum, gallium, and scandium; D comprises one or more transition metal ions; and wherein 0≤x≤1, 0≤y≤1, and x+y>0; and (ii) further providing a precursor of an oxide material, wherein said oxide material has a melting point of at least 850°C; (b) mixing said (i) luminescent material comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor and (ii) said precursor of an oxide material; (c) curing said precursor of said oxide material to obtain a cured particle, said cured particle comprising said luminescent material, and a coating of said oxide material; (d) heating said cured particle at a first temperature for a first duration, wherein said first temperature is 600 °C or higher, wherein said first duration is 10 minutes or more; and (e) heating said cured particle under a reducing atmosphere comprising carbon monoxide at a second temperature for a second duration, wherein said second temperature is 700 °C or higher, and wherein said second duration is 1 hour or more.

The invention relates to the technical field of films, in particular to a flexible film special for a handwriting board and a preparation method of the flexible film. The flexible film is obtained by coating a release film with coating slurry and carrying out thermocuring, wherein the coating slurry contains modified polyurethane, a flatting agent, a defoaming agent and ethyl acetate. According to the modified polyurethane, polycarbonate diol, isophorone diisocyanate and other raw materials are subjected to a reaction, and a nano particle chain extender containing disulfide bonds is added. The nano particle chain extender containing disulfide bonds is prepared by modifying nano silicon dioxide and grafting cystamine dihydrochloride and diamino polyethylene glycol. Through nanoparticle surface modification and dynamic disulfide bond network construction, molecular-level coupling of a rigid reinforced phase and a flexible substrate, inhibition of nanoparticle aggregation and balance of strength and toughness are realized, the dynamic disulfide bond network can self-repair microcracks, and a high-quality special flexible film solution is provided for a high-performance handwriting board.

The invention discloses nanoparticles for a contrast agent as well as a preparation method and application of the nanoparticles, and relates to the technical field of nano composite materials. According to the nanoparticle for the contrast agent, a shell layer comprises polydopamine and albumin which are connected through a covalent bond, a core structure comprises a complex formed by metal ions and polyphenol, and the metal ions in the core structure and the polydopamine in the shell layer also have a coordination effect. Due to the fact that all the components are tightly connected, the rotation time of the nano-particles is prolonged, the T1 relaxation rate of the nano-particles is greatly increased, meanwhile, due to introduction of polydopamine, release of metal ions in a human body is avoided, the biological safety of the nano-particles is improved, albumin in the nano-particles can further improve the biocompatibility of the particles, and the nano-particles can be used for preparing the nano-particles. Therefore, the nanoparticles provided by the invention also have wide application prospects in the fields of fluorescence imaging and targeted drug delivery.

The invention provides lipidosome wrapping L-arginine / Prussian blue nano particles and a preparation method and application thereof, and belongs to the technical field of biological agents. L-arginine is deposited on hPB through iron chelation, then the lipidosome is coated to avoid leakage of water-soluble L-arginine in circulation, and thus the L-arginine / Prussian blue nano particles are obtained. The liposome coated with the L-arginine / Prussian blue nano particles is obtained. Due to the EPR effect, the hPLL-coated Lipo can be efficiently transferred and distributed into tumor tissues, heat is generated under the near-infrared light irradiation condition to ablate a large number of tumor cells, the utilization degree of the tumor cells to L-arginine is greatly limited, meanwhile, immunogenic death is induced, DAMPS is released in situ, infiltration and activation of anti-tumor T cells are further promoted, and the anti-tumor effect is achieved. The tumor immunotherapy is enhanced. And under illumination, the liposome disintegrates and releases the L-arginine, so that nutritional support is provided for immunological competence cells in competitive disadvantage, and activation of an immune microenvironment is promoted.

The invention discloses a preparation method and application of composite nanoparticles with a gold-silver core-shell structure, and aims to solve the problems that silver halide precipitates are generated on the surface of a silver core and the silver core is etched in the prior art. The thiourea solution is used for replacing a halogen-containing reagent, uniform epitaxial growth of gold on the surface of the silver core is mildly achieved, the gold-shell silver-core nanoparticles which are evenly wrapped and stable in structure are prepared, and the gold-shell silver-core nanoparticles are suitable for the fields of immunodetection and the like and are good in color development effect and low in cost. The method comprises the steps of preparing a gold salt solution, preparing gold nano-seeds, preparing silver nano-cores and generating gold-shell silver-core nano-particles through a chemical reduction reaction, and the problem that a core-shell structure grows unevenly is solved. When the method is applied to immunodetection, the material cost can be remarkably reduced, and a better color development effect can be achieved.

The invention discloses an electrochemical detection method of dopamine, and belongs to the technical field of analysis. According to the method, SnS2 quantum dots are loaded on Zn-MOF and modified on an electrode, then gold nanoparticles and a sulfydryl-containing dopamine aptamer single chain are sequentially fixed on the electrode, an Apt / AuNPs / SnS2QDs (at) Zn-MOF / GCE composite electrode (in an open state) is formed, an electrochemical signal of the composite electrode is greatly improved, and based on specific recognition between dopamine and an aptamer chain, the electrochemical performance of the composite electrode is improved. A large cavity of Zn-MOF is used for packaging SnS2 quantum dots with excellent electrochemical properties, electrochemical signal amplification is achieved, when a target object dopamine exists, dopamine can quench an ECL signal, an electric signal is obviously reduced (in a closed state), and therefore a linear relation between the change of the electrochemical signal and the concentration of dopamine is constructed, and the electrochemical property of the electrochemical signal is improved. Therefore, high-sensitivity and high-selectivity detection of dopamine is realized.

The invention relates to the technical field of abdominal wall adhesion materials induced by prevention and treatment of bacterial infection, and discloses an ionic liquid-based antibacterial-anti-inflammatory integrated bioactive nanoparticle with microwave sensitivity, a preparation method and application of the ionic liquid-based antibacterial-anti-inflammatory integrated bioactive nanoparticle. Then, the surfaces of the hollow nano particles are modified with bacteria specific targeting molecule 3-aminophenylboronic acid, and PBA-HPDA is formed; finally, chlorogenic acid and quaternary ammonium salt are combined according to a certain proportion to form ionic liquid (ILs) with a microwave heat effect, the ionic liquid (ILs) is wrapped in HPDA, and composite nanoparticles PBA-HPDA-CAQAC are formed. The nano particle material prepared by the invention has microwave heat effect and antibacterial and anti-inflammatory integrated biological activity, and has excellent bactericidal and anti-inflammatory effects.

The invention discloses a preparation method of a large-area and distance-adjustable gold nanoparticle single-layer superlattice film and a product and application thereof, and belongs to the technical field of nanomaterials, the method comprises the following steps: modifying the surfaces of gold nanoparticles by using sulfydryl polystyrene and 1, 8-octyldithiol to obtain double-ligand co-modified gold nanoparticles; an interface assembly strategy is adopted to enable the double-ligand co-modified gold nanoparticles to form a film at the interface of toluene and diethylene glycol, and after toluene volatilizes, the large-area gold nano single-layer superlattice film with the adjustable distance is obtained. According to the method disclosed by the invention, by accurately regulating and controlling double-ligand modification on the surfaces of the gold nanoparticles and optimizing interaction among the particles in the assembly process, accurate regulation and control of the particle spacing of the gold nanoparticle single-layer superlattice film from 1nm to 8nm are realized. The electromagnetic field intensity can be obviously enhanced by accurately regulating and controlling the particle gaps to the sub-nanometer scale, so that the material becomes an ideal SERS substrate, and possibility is provided for developing a metamaterial with a high optical index.

Some variations provide a photochromic heterostructure comprising: first semiconductor nanoparticles that have an average first-nanoparticle effective diameter from 1 nanometer to 20 nanometers, wherein the first semiconductor nanoparticles are not doped; and second semiconductor nanoparticles that have an average second-nanoparticle effective diameter from 1 nanometer to 60 nanometers, wherein the second semiconductor nanoparticles are doped with one or more transition metals, wherein the second semiconductor nanoparticles have a bandgap energy that is higher than the bandgap energy of the first semiconductor nanoparticles, and wherein the first semiconductor nanoparticles and the second semiconductor nanoparticles are in physical contact with each other. The disclosed photochromic heterostructure is especially useful when lower-energy light excites lower-energy-bandgap first nanoparticles to cause higher-energy-bandgap, doped second nanoparticles to photodarken. If the first nanoparticles were not present, the doped second nanoparticles would require higher-energy light to cause darkening. Examples demonstrate embodiments of the invention.

The invention provides a nanoparticle capable of releasing EGCG (epigallocatechin gallate) in response to ROS (reactive oxygen species) as well as a preparation method and application of the nanoparticle. The nanoparticles comprise a carrier and EGCG (epigallocatechin gallate) loaded on the carrier; the carrier is Prussian blue nanoparticles of which the surfaces are modified with polyethyleneimine and phenylboronic acid compounds. The preparation method of the nanoparticles is simple and easy to operate, the nanoparticles are good in dispersity, and through research, the nanoparticles have CAT-like, SOD-like and other multi-enzyme activities, can remove. OH, have a high EGCG drug loading rate and release EGCG in the presence of ROS. Besides, the nanoparticles show a good effect of improving myocardial ischemia reperfusion injury in cell level and rat in-vivo experiments, through comparison of EGCG and PB NPs single-drug treatment, synergistic treatment in the composite material achieves an effect of '1 + 1 > 2', and the composite material has good biological safety.

The invention relates to polypeptide gold nanoparticles modified by trace cigarette extract CSE (0.1%-1%) and application of the polypeptide gold nanoparticles in preparation of drugs for treating chronic obstructive pulmonary diseases. The polypeptide-modified gold nanoparticle is a polypeptide-modified gold nanoparticle as shown in a sequence SEQ ID NO: 1. It is confirmed for the first time that polypeptide (CLPFFD, SEQ ID NO: 1) gold nanoparticles modified by trace CSE (0.1%-1%) can antagonize mtDNA synthesis and inhibit mitochondrial ROS generation so as to inhibit activation of macrophage NLRP3 inflammasome, induce depolarization of macrophage and target lung macrophage in vivo to achieve anti-inflammatory activity, and the polypeptide (CLPFFD, SEQ ID NO: 1) gold nanoparticles can be used for preparing anti-inflammatory drugs. The compound has an obvious treatment effect in a COPD acute exacerbation model and a stable phase model, so that the compound can be used for preparing medicines for treating COPD. The medicine has the advantages of being remarkable in curative effect, capable of acting on specific cells in a targeted mode, convenient to track in vivo and the like, and a new treatment means is provided for COPD.

The invention belongs to the technical field of building material admixtures, and particularly relates to a difunctional gypsum admixture based on plant polyphenol-nano particles and a preparation method of the difunctional gypsum admixture. The preparation method comprises the following steps: adding plant polyphenol into a metal oxide nanoparticle dispersion liquid, adjusting the pH value, and filtering, washing and drying after reaction to obtain the difunctional gypsum admixture. The gypsum admixture provided by the invention can delay the setting time of gypsum and increase the plasticity time of gypsum slurry, after 10-50% of the admixture is introduced based on the mass of gypsum, the initial setting time of the gypsum is prolonged to 20-80 min, and meanwhile, efficient shielding of the gypsum to X-rays can be realized; meanwhile, the problem that metal oxide nanoparticles cannot be uniformly and stably loaded on gypsum crystals is solved.

The invention discloses a rapid and accurate detection method for pathogenic bacteria. The method comprises the following steps: immobilizing bacteriophages on the surfaces of magnetic nanoparticles through physical adsorption or chemical reaction, selectively enriching pathogenic bacteria in a complex sample by adopting the bacteriophage functionalized magnetic nanoparticles, quickly cracking the pathogenic bacteria on the surfaces of the magnetic nanoparticles by using CTAB (cetyltrimethyl ammonium bromide), releasing ATP in the bacteria, and quantitatively analyzing ATP by using bioluminescence. Further calculating the content of the pathogenic bacteria; the detection method is free of enrichment and amplification, can complete capture, enrichment and detection of pathogenic bacteria within 20 minutes, and can specifically detect viable bacteria of target bacteria in various complex matrix (such as food) samples due to the fact that bacteriophages are adopted as recognition molecules.

The invention discloses a cobalt nanoparticle / nitrogen-doped carbon composite material and a preparation method and application thereof, and belongs to the technical field of photocatalytic degradation materials.The preparation method comprises the steps that turnip strips are soaked in a solution of soluble Co < 2 + > salt and a nitrogen source, freeze drying and grinding are conducted, and a precursor of the cobalt / nitrogen-doped carbon composite material is obtained; and heating and calcining the precursor of the cobalt / nitrogen-doped carbon composite material in a protective atmosphere to obtain the cobalt nanoparticle / nitrogen-doped carbon composite material. According to the invention, plant cells are used as a template, and uniform loading of cobalt nanoparticles is realized through a self-absorption function of the plant cells, so that an efficient photocatalyst is developed, and efficient photocatalytic degradation of chloroquine phosphate and various organic pollutants in a water body is realized.

The invention relates to the technical field of detection and analysis, and discloses a nanoparticle for detecting the concentration of methotrexate as well as a preparation method and application of the nanoparticle. The nanoparticles disclosed by the invention comprise hairpin DNA which is connected with the gold nanoparticles and is provided with a marking group and aptamer chain DNA which can be specifically recognized by methotrexate, and the aptamer chain DNA and walking chain DNA are hybridized into double-chain DNA which is connected to a magnetic bead, on one hand, the concentration of MTX is measured by marking a DNA chain of a fluorophore and collecting a fluorescence signal; on the other hand, after sodium chloride is added into the gold nanoparticles without DNA protection, the color of the gold nanoparticles changes under a high-salt condition, and the concentration of MTX is measured by collecting ultraviolet values. According to the nanoparticles provided by the invention, all parts interact with one another, signals are amplified, the effect of double detection of MTX concentration is exerted, and a powerful strategy is provided for accurately mastering the drug concentration in real time and improving the treatment safety and effect.

The invention belongs to the technical field of chromatographic packing, and particularly relates to a double-layer stacking hole type SiO2-coated SiO2 core-shell microsphere as well as a preparation method and application thereof. The core-shell microsphere takes micron-sized non-porous SiO2 as a core and takes a SiO2 nanoparticle stacking layer as a porous shell layer, the porous shell layer sequentially comprises a first SiO2 mesoporous shell layer and a second SiO2 mesoporous shell layer from inside to outside, SiO2 nanoparticles in the first SiO2 mesoporous shell layer are stacked to form a first gap pore channel, and SiO2 nanoparticles in the second SiO2 mesoporous shell layer are stacked to form a second gap pore channel. According to the invention, a porous shell structure with dual or multiple pore size distribution is constructed on the surface of a SiO2 core, and by integrating more than two pore sizes with obvious size difference, exclusive mass transfer paths are provided for solute molecules with different sizes, exclusive mass transfer channels can be provided for small-molecular compounds and macromolecular substances at the same time, and the pore size difference is greatly reduced. Therefore, the selectivity and column efficiency of chromatographic separation are remarkably improved.

The invention belongs to the technical field of gram-positive bacterium detection, and particularly relates to a nano-probe for detecting gram-positive bacteria and a preparation method, a detection method and application of the nano-probe for detecting the gram-positive bacteria, and the nano-probe for detecting the gram-positive bacteria comprises concanavalin A modified magnetic nanoparticles and vancomycin modified long afterglow nanoparticles, the magnetic nanoparticles comprise FeCl3, the long afterglow nanoparticles comprise ZnGa2O4: Cr, and the preparation method comprises a preparation method of the concanavalin A modified magnetic nanoparticles and a preparation method of the vancomycin modified long afterglow nanoparticles. The nano-probe provided by the invention has the functions of recognition, separation and enrichment, interference resistance and signal providing in the detection of gram-positive bacteria, and provides a new detection means for the recognition and detection of gram-positive bacteria.

The invention discloses a single-chain nanoparticle composite reinforced and toughened plastic material and a preparation method thereof, and belongs to the technical field of polymer plastics. The reinforced and toughened plastic material is prepared from the following raw materials in parts by weight: 10 to 20 parts of polymer monomer, 0.004 to 0.005 part of initiator, 0.05 to 0.06 part of chain transfer agent, 8 to 12 parts of solvent and 0.1 to 0.2 part of functional filler, the preparation method specifically comprises the following steps: (1) weighing the raw materials; (2) uniformly mixing the raw materials, and performing nitrogen atmosphere replacement and polymerization reaction; and (3) re-precipitating, and drying in vacuum to obtain the product. The reinforced and toughened plastic material disclosed by the invention not only has excellent performance in the aspect of tensile property, but also shows excellent mechanical response under a bending-resistant load, and is suitable for engineering plastic application scenes with relatively high requirements on structural stability and use safety.

The invention discloses a preparation method of a demulsifier for oil-water separation of full fermentation broth, and relates to the technical field of demulsifier preparation.The preparation method comprises the steps of magnetic nanoparticle preparation, nanoparticle coating and demulsifier preparation.The preparation method has the advantages that salt is dissolved in a three-neck flask, nitrogen is introduced to discharge oxygen in the solution, and the demulsifier is obtained; according to the preparation method, the magnetic nanoparticles are added into the mixture A, so that the generated nanoparticles can be prevented from being oxidized, the mixture A is added in the process of adding the potassium nitrate and the 2-methylimidazole, and the polydopamine in the mixture A has good adhesion and biocompatibility, so that a'bridge '-like connection effect can be achieved between the magnetic nanoparticles and a subsequently generated nanoparticle coated sample; and polyvinylpyrrolidone can be used as a dispersant to prevent agglomeration of generated nano particle coated sample particles, and polar groups on molecular chains of polyvinylpyrrolidone can generate certain interaction with raw materials in a reaction system to optimize the growth process of the nano particle coated sample.

The present invention discloses a preparation method of a photothermal super-hydrophobic coating with excellent anti-icing / de-icing performance under a low temperature and high relative humidity environment, first by in situ growth of photothermal Cu-MOF nanoparticles on the surface of low thermal conductivity fibrous clay mineral nanoparticles, constructing a two-level nano- / nano-structured composite photothermal particle, which is then subjected to low surface energy modification and introduced into a low thermal conductivity binder, and a binder is induced to phase separate to form a micron-scale binder / low surface energy nanoparticle aggregate by a non-solvent, and finally a photothermal super-hydrophobic coating with a three-level micro- / nano- / nano-structure is constructed by spraying. The three-level micro- / nano- / nano-structure of the coating simultaneously gives the coating excellent photothermal performance and the Cassie-Baxter state stability of the droplet on the coating surface under a low temperature and high relative humidity environment, so that it has excellent passive anti-icing / frosting and active de-icing / defrosting performance in this environment. The low thermal conductivity of the coating further suppresses the heat exchange between the substrate-water droplets, so that the passive anti-icing / frosting performance of the coating is further improved. In addition, the present invention has the advantages of simple preparation method and large-area preparation, laying a solid foundation for the practical application of photothermal superhydrophobic anti-icing coatings.

The invention discloses an anti-corrosion self-repairing super-amphiphobic coating film and a preparation method thereof, and belongs to the technical field of polymer coating materials. The coating film sequentially comprises a nano particle skeleton layer, a dynamic borate bond layer and a super-amphiphobic functional layer from inside to outside, and the three-layer gradient design synergistically realizes micro / nano structure stability, self-repairing and super-amphiphobic functions. The framework layer takes SiO2-TiO2 composite nanoparticles as a substrate and provides support; the dynamic boric acid ester bond layer forms a dynamic network through polycondensation of an organic boron compound, endows the self-repairing capability and enhances interface bonding; the super-amphiphobic functional layer is formed by grafting a fluorine-containing organosilicon compound and has hydrophobic and oleophobic properties. A multi-layer structure is constructed step by step, the reaction condition is mild, the operation is simple, the cost is low, the method is suitable for large-scale industrial preparation, the coating film has excellent super-amphiphobic performance and interface adhesion performance, the super-amphiphobic performance of the coating film can still be kept stable in long-term use or a complex environment, and the problem that an existing super-amphiphobic material is prone to damage is effectively solved.