125 results about "Colloidal Solution" patented technology

The invention relates to the technical field of seed coating materials, and discloses a wheat and rice seed coating material and a coating process. The wheat and rice seed coating material comprises micron iron powder, nano calcium phosphate, nano magnesium hydroxide and a binder, the addition amounts of the micron iron powder, the nano calcium phosphate and the nano magnesium hydroxide respectively account for 10%-20%, 2%-10% and 3%-10% of the total weight of the seeds; the binder is at least one of a polyvinyl alcohol colloidal solution, a carboxymethyl cellulose colloidal solution and a hydroxypropyl methyl cellulose colloidal solution. The invention also provides a coating process of the wheat and rice seed coating material. The coating material disclosed by the invention not only can protect seeds, but also can efficiently adsorb and fix heavy metal ions of lead, cadmium and arsenic after the micron iron powder, the nano calcium phosphate and the nano magnesium hydroxide are slowly released in soil, so that integrated prevention and control from'seeds' to'rhizosphere 'is realized.

The present application relates to a controllable preparation method of a colloidal crystal capillary column and its application in biomolecule separation, and specifically comprises the following steps: a plunger and an electroosmotic pump are prepared in situ at one end of a capillary; a buffer solution containing monodisperse colloidal particles is filled in an upper reservoir of an electric field assembly device, and a buffer solution is filled in a lower reservoir; the capillary is filled with the buffer solution, and the end of the capillary containing the electroosmotic pump is inserted into the lower reservoir; the dispersion of the colloidal solution is maintained by applying oscillation to the upper reservoir, an electric field is applied between the two reservoirs to make the colloidal particles move to the electroosmotic pump under the action of an electroosmotic flow, and a three-dimensional colloidal crystal is assembled; and the capillary is supplemented with an ultrasonic force to reduce lattice defects. The present application has the advantages of simple preparation process, controlled directional movement of colloidal particles through an electric field, improved assembly efficiency and quality of the three-dimensional colloidal crystal, and controllable assembly of the colloidal particles under the action of an electric field through regulation and control of the length and surface charge of the electroosmotic pump.

Provided are a method for producing microparticles capable of improving the purity of microparticles, and a colloidal solution. A method for generating microparticles using a femtosecond pulse laser includes an irradiation step of irradiating a powder material 5 in a solvent 6 with a femtosecond pulse laser to generate microparticles containing a metal atom, in which the powder material 5 has a mid-diameter larger than that of the microparticle and contains the metal atom. For example, the powder material 5 includes a first powder material containing a first metal atom and a second powder material containing a second metal atom different from the first metal atom, and the microparticle is an alloy containing the first metal atom and the second metal atom.

The invention provides a preparation method for improving the solid content of a glue solution in the production process of a catalytic cracking catalyst, and belongs to the technical field of catalytic cracking catalyst preparation. According to the method, the mixing sequence of a silicon source and an aluminum source is optimized, the pH value and temperature of a reaction system are controlled, and a composite dispersing aid is introduced, so that the problems of difficulty in subsequent catalyst forming, unstable activity and the like caused by low solid content of a glue solution in a traditional preparation process are solved. The method is characterized by comprising the steps of (1) preparing an aluminum source solution, (2) preparing a silicon source dispersion liquid and (3) preparing a glue solution through a mixed reaction, the solid content of the glue solution can be increased to 38-45%, the glue solution is good in dispersion uniformity and free of obvious agglomeration phenomenon, the abrasion index of the subsequently prepared catalytic cracking catalyst is reduced by 8-12%, the catalytic activity is improved by 5-8%, and the method is suitable for large-scale industrial production.

The application belongs to the technical field of medical materials, and discloses a hydrogel for graded release of acid and long-acting consumption of alkali as well as a preparation method and application thereof, which comprises the following steps: adding a quaternary ammonium salt chitosan solution into a polyvinyl alcohol-organic acid ester solution, stirring uniformly to obtain a polyvinyl alcohol-organic acid / quaternary ammonium salt chitosan solution; under stirring, adding a nano metal sulfide colloidal solution into the polyvinyl alcohol-organic acid / quaternary ammonium salt chitosan solution, stirring uniformly, and repeatedly freezing and thawing to obtain the hydrogel for graded release of acid and long-acting consumption of alkali after thawing. The application proposes a strategy for graded release of acid and long-acting slow release of alkali, the hydrogel slowly releases acid in application, and the process of long-acting consumption of alkali liquid avoids secondary damage of an acid-alkali reaction to a cornea, so that the hydrogel has a good application prospect in clinical application of corneal alkali burn and opens up a new way for application of H2S in corneal alkali burn.

A method for producing a gold colloid-labeled antibody suspension, comprising: a labeling step of obtaining a mixture by mixing a gold colloid solution and an antibody solution to obtain a gold colloid-labeled antibody in the mixture; a centrifugation step of centrifugating the mixture to obtain a precipitate of the gold colloid-labeled antibody and removing the supernatant containing antibody that does not have gold colloid adsorbed; and a suspension step of suspending the precipitate of the gold colloid-labeled antibody in a suspension solution containing lactalbumin to obtain a gold colloid-labeled antibody suspension.

The invention relates to a surface-enhanced flexible Raman substrate, a surface-enhanced Raman sensor for nano-plastic trace detection and a preparation method of the surface-enhanced Raman sensor. The preparation method of the surface-enhanced flexible Raman substrate comprises the following steps: preparing a colloidal solution by taking BNCs, a CS solution and a HAuCl4 aqueous solution as raw materials; the preparation method specifically comprises the following steps: dispersing an aqueous solution of HAuCl4 into an aqueous solution of BNCs, adding pvp for physical mixing and stirring, and then adding ethanol to obtain a mixture; and irradiating the mixture with laser, washing with deionized water for three times to obtain a BNCs / AuNWs colloidal solution, dropwise adding a CS solution, stirring, and carrying out suction filtration on the colloidal solution to obtain the BNCs / AuNWs coated CS surface-enhanced Raman scattering substrate. The CS substrate enhances molecular adsorption, so that the adsorption rate of the nano-scale plastic particles is greatly improved, the gold nanoparticles generate an enhanced LSPR effect on the surface of the substrate, a Raman signal is improved by 60-63 times, and the detection efficiency is improved.

This invention relates to a microwave radiation method for preparing room-temperature phosphorescent polymer films based on polyacrylamide, belonging to the field of organic light-emitting materials. The method involves dissolving acrylamide monomer, ammonium persulfate initiator, and β-diketone ligand in a mixed solvent of water and acetonitrile, placing the solution in a microwave reactor, and polymerizing it under microwave radiation to obtain the polymer. The resulting colloidal solution, dissolved in deionized water, is uniformly coated onto a polytetrafluoroethylene (PTFE) or silicone plate, and dried to obtain the room-temperature phosphorescent polymer film based on polyacrylamide. The prepared polymer film exhibits blue or blue-green fluorescence and a green afterglow. The polymer film containing 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione has an afterglow time of up to 7.5 seconds. The raw materials of this invention are readily available, the preparation method is simple, convenient, and rapid, requiring no inert gas protection, the solvent does not require treatment, polymerization can be completed in minutes, and the obtained material is non-toxic, non-polluting, free of heavy metals and halogens, has good water solubility, and has broad application prospects.

This invention belongs to the field of lithium resource extraction technology, specifically relating to a polypyrrole-coated MXene / lithium iron phosphate composite aerogel material, its preparation method, and its application. The preparation method of the polypyrrole-coated MXene / lithium iron phosphate composite aerogel material of this invention includes the following steps: S1, mixing MXene colloidal solution with lithium iron phosphate powder, stirring and dispersing to obtain mixture A; adding a pyrrole monomer solution to mixture A, stirring to allow the pyrrole monomer to adsorb onto the surfaces of MXene and lithium iron phosphate; S2, adding an initiator solution to the system obtained in step S1 to initiate in-situ polymerization of the pyrrole monomer, forming an MXene / LFP / PPy composite hydrogel; S3, washing and freeze-drying the composite hydrogel. The polypyrrole-coated MXene / lithium iron phosphate composite aerogel material of this invention helps improve lithium extraction efficiency and exhibits good cycle stability.

The present application belongs to the technical field of environmental data analysis, and particularly relates to a method for predicting heavy metal concentration in soil colloid solution based on a machine learning model. Colloid extraction is performed on heavy metal contaminated soil samples, and characteristic variables of the soil colloid solution are determined. The characteristic variables are standardized and coded, and the preprocessed characteristic variables are respectively input into pre-trained machine learning models for predicting the concentrations of As, Cd, Pb and Zn in the soil colloid solution to obtain predicted values corresponding to the heavy metal concentrations. The pre-trained machine learning models for As and Pb are two-stage models, the first stage being a release probability classification model and the second stage being a release amount regression model. The pre-trained machine learning models for Cd and Zn are single-stage regression models. The present application provides a method for predicting heavy metal concentration in soil colloid solution based on a machine learning model, which provides a reliable technical method for accurately predicting heavy metal release characteristics.

The invention discloses a method for preparing porous zirconia ceramic by low-temperature sintering, which comprises the following steps: S1, mixing citric acid, zirconium acetylacetonate and absolute ethyl alcohol according to a certain proportion to obtain a colloidal solution A; s2, mixing inorganic yttrium salt, inorganic zirconium salt and water according to a certain proportion to obtain a mixed solution B; s3, slowly adding the colloidal solution A into the mixed solution B obtained in the step S2; s4, drying the colloidal solution to obtain a dried precursor; s5, carrying out low-temperature calcination on the dried precursor to obtain nano yttrium-stabilized zirconia powder; s6, performing ball milling and spray granulation on the powder to obtain spherical granulation powder with uniform particle size; s7, carrying out dry pressing molding and cold isostatic pressing molding to obtain a to-be-sintered ceramic biscuit; and S8, sintering in a muffle furnace to obtain the final porous zirconia ceramic. After the powder is subjected to ball milling, granulation, dry pressing and cold isostatic pressing, the zirconia ceramic which is uniform in pore diameter and has nano-scale pores is prepared through low-temperature sintering.

The invention discloses a heteromorphic covalent organic framework membrane as well as a preparation method and application thereof, and belongs to the technical field of separation membrane materials. The method comprises the following steps: firstly, synthesizing a COF nanosheet colloidal solution through a homogeneous solution method; then carrying out suction filtration on the colloidal solution to a porous supporting base membrane to form a crystalline COF layer; and finally, growing an amorphous COF layer on the surface of the crystalline COF layer in situ through interfacial polymerization, and carrying out heat treatment to obtain the heteromorphic covalent organic framework film. According to the invention, the rigid crystalline COF is used for providing a long-range ordered pore channel, the flexible amorphous COF is used for strengthening the controllable processability to make up the defect, a rigid-flexible heteromorphic configuration is formed, and the construction of the continuous defect-free COF film is realized. The preparation method is simple, the characteristics of a crystalline state and an amorphous state are coupled, a multi-layer sub-nanometer mass transfer channel is formed in the membrane, high permeability and high rejection rate are shown in the separation process of organic pollutants in water, and good long-term separation stability is achieved.

The invention discloses a Ti < 3 > C < 2 > T < x > MXene-GQD nano composite material as well as a preparation method and application thereof, and relates to the technical field of composite material preparation. The method comprises the following steps: dissolving LiF in a hydrochloric acid solution, and adding Ti3AlC2 powder to prepare a colloidal solution; the preparation method comprises the following steps: dissolving citric acid in deionized water, and then carrying out hydrothermal carbonization to prepare a GQD solution; and mixing the colloidal solution and the GQD solution, and stirring to obtain the nano composite material. According to the invention, the Ti3C2Tx MXene two-dimensional lamellar structure is utilized to stabilize the GQD nanoparticles, so that the GQD nanoparticles are uniformly dispersed and are not easy to agglomerate, and the long-term uniformity is ensured; by utilizing the photothermal effect of Ti3C2Tx MXene and the photodynamic effect of GQD, the dual photoresponse antibacterial efficiency is realized, the infection of drug-resistant bacteria can be efficiently inhibited, a non-antibiotic way is provided for treating the drug-resistant bacteria, and the infection problem and the related postoperative pain problem are effectively controlled in practice.

A hydrate decomposition inhibiting composition, a coupling enhanced solid hydrate, and a method for improving the solid hydrate storage and transportation stability relating to the technical field of natural gas safety storage and transportation are provided. The hydrate decomposition inhibiting composition contains a carboxymethyl starch salt and an alkyl glycoside surfactant. The composition improves the interface stability of the hydrate phase boundary and the mechanical stability of the hydrate and enhance the strength of the hydrate crystal interface since the colloidal solution formed by dispersing the sodium carboxymethyl starch and the alkyl glycoside surfactant in water can coat the surface of the hydrate to form a protective layer, thereby improving the structural stability of the hydrate. Therefore, the composition inhibits the decomposition of the hydrate, reduces the decomposition rate of the hydrate, and can further reduce the decomposition amount of the hydrate.

The invention provides a preparation method of a water-proof and oxygen-proof nanocrystal composite material, which comprises the following steps: atomizing and drying a solution I containing a nanocrystal precursor and a polymer to obtain nanocrystal composite particles, dispersing the nanocrystal composite particles in a colloidal solution, ultrasonically and uniformly mixing the nanocrystal composite particles with a solution II containing a water-proof and oxygen-proof polymer, and performing secondary atomizing and drying to obtain the water-proof and oxygen-proof nanocrystal composite material. And forming a polymer protective layer with water and oxygen barrier property on the surfaces of the nanocrystalline composite particles to obtain the water-proof and oxygen-proof nanocrystalline composite material. The nanocrystalline composite material can be dispersed in packaging base materials such as EVA and POE, has high photoelectric conversion efficiency, maintains long-term environmental stability, and remarkably prolongs the service life of a display device. According to the preparation method, the nanocrystalline composite material is prepared by adopting a secondary spray drying process, the destructive effect on the nanocrystalline material in a traditional liquid phase coating method is avoided, the second waterproof oxygen-barrier polymer layer can greatly improve the environmental stability of the nanocrystalline material, and meanwhile, the nanocrystalline material can be prepared with high efficiency and high material utilization rate; and the method is suitable for large-scale production.

This invention relates to a method for synthesizing multicolored luminescent polymer films using a microwave approach. The method first involves dissolving acrylamide, ammonium persulfate, and α-thiophenecarboxylic acid trifluoroacetone in a solvent, then refluxing the mixture under microwave power. After cooling to room temperature, polymer A is precipitated with methanol. Polymer A is then dissolved in deionized water, europium nitrate solution is added, the pH is adjusted to neutral, the mixture is shaken, and after standing, polymer B is precipitated with methanol. Finally, polymer B is dissolved in deionized water to obtain a colloidal solution. The colloidal solution is dropped into a silicone mold and dried to obtain the multicolored luminescent polymer film. This invention provides a simple, convenient, and rapid preparation method that does not require inert gas protection and can complete polymerization within minutes, showing broad application prospects.

The invention relates to the technical field of catalysts, in particular to a carbon monoxide catalyst capable of being regenerated in situ, a preparation method and application. The catalyst is prepared by the method. The method comprises the following steps: uniformly mixing prepared carbon deposition repairing powder and prepared active catalytic powder according to a mass ratio of 1: (1-2) to obtain composite powder; uniformly mixing the composite powder, a colloidal solution and water according to the mass ratio of 20: (3-5): (25-40) to obtain slurry with the solid content of 30%-45%; and coating a carrier with the slurry, and sequentially carrying out third drying treatment and third roasting treatment to obtain the carbon monoxide catalyst capable of being regenerated in situ. The application comprises application of the catalyst in catalytic oxidation of carbon monoxide and application of the catalyst in regeneration after carbon deposition. The catalyst prepared by the invention not only can catalytically oxidize carbon monoxide into carbon dioxide, but also has a carbon deposit repairing function and an in-situ regeneration function at 330-350 DEG C.

The present application relates to the technical field of catalyst, in particular to a carbon monoxide catalyst capable of in-situ regeneration, a preparation method and application thereof. The catalyst is prepared by the method. The method comprises the following steps: uniformly mixing carbon deposition repair powder and active catalyst powder prepared according to a mass ratio of 1:1-2 to obtain a composite powder; uniformly mixing the composite powder, a colloidal solution and water according to a mass ratio of 20:3-5:25-40 to obtain a slurry with a solid content of 30%-45%; and coating the slurry on a carrier, and then sequentially performing third drying treatment and third calcination treatment to obtain the carbon monoxide catalyst capable of in-situ regeneration. The application comprises the application of the catalyst in catalyzing the oxidation of carbon monoxide, and the application of the catalyst in regeneration after carbon deposition. The catalyst prepared by the present application not only can catalyze the oxidation of carbon monoxide into carbon dioxide, but also has the functions of carbon deposition repair and in-situ regeneration at 330-350 DEG C.

The invention belongs to the technical field of building materials, and relates to disposable redispersible asphalt powder as well as a preparation method and application thereof. The asphalt powder comprises the following components in parts by weight: 100 parts of asphalt, 2-20 parts of an emulsifier, 5-20 parts of protective colloid, 0.5-40 parts of a stabilizer, 1-10 parts of a slow-release complexing agent and 5-20 parts of an anti-caking agent. The slow-release complexing agent is one or more of activated modified borax, modified boric acid, modified sodium silicate or chromate, and the activation mode of the slow-release complexing agent is that an inorganic salt aqueous solution and a part of the protective colloid solution are mixed in advance. The specific slow-release complexing agent is introduced and forms a synergistic system with the emulsifier, the protective colloid and the like, so that the asphalt powder can be quickly redispersed when meeting water for construction for the first time, the complexing agent and a hydrophilic component are subjected to irreversible reaction after drying and film forming, redispersibility is permanently lost, and the technical problem that a traditional product is poor in water resistance after film forming is effectively solved. The product is suitable for the fields of waterproof and anticorrosive dry-mixed mortar, asphalt coiled material base layer treating agents and the like.

A pharmaceutical composition for targeted radionuclide therapy comprising a plurality of nanostructures. Each respective nanostructure may comprise a hydrophilic inner cavity and an outer shell of PEG. The hydrophilic inner cavity may comprise a colloidal solution of Lu-177 DOTATAE and a plurality of high-atomic-number nanoparticles selected from a group consisting of gold nanoparticles, platinum nanoparticles and tantalum nanoparticles with a maximum diameter of 1 to 20 nm in a aqueous medium with a ratio (Lu-177 DOTATE: the plurality of high- atomic-number nanoparticles) of 1: 50-60. The outer shell of PEG may have a surface charge between -0.1 and -0.3 mV. The plurality of high-atomic-number nanoparticles may have a diameter of 20 nm. Each respective nanostructure may have a diameter between 50 and 200 nm. Each respective nanostructure may have a diameter of 150 nm. The aqueous medium may be selected from a group consisting water and acetone.

This invention relates to a gas separation membrane for N2 / CH4 using a dual-selectivity mechanism and its preparation method. Chromium nitrate nonahydrate, an organic acid, acetylacetone, ethyl acetate, and acetone are mixed and dissolved to obtain a dark green solution. The dark green solution is poured into sufficient diethyl ether to precipitate the precipitate, which is then dried in a vacuum oven to obtain chromium cluster powder. An MXene colloidal solution is lyophilized to obtain MXene sheet material. Deionized water and chromium cluster powder are mixed to form solution A. The MXene sheet material is added to solution A to obtain mixture B. Mixture B is deposited onto nylon filter paper using vacuum filtration to form a gas separation membrane, which is then placed in a vacuum oven to activate the chromium clusters. A Cr-MXene gas separation membrane rich in Cr clusters between MXene sheets is prepared. The prepared membrane possesses both diffusion-selectivity and reaction-selectivity mechanisms, enabling efficient separation of the N2 / CH4 system.

The application discloses a whole structure type ammonia decomposition catalyst containing a coating and a preparation method thereof, and comprises the following steps: step one, selecting a magnesium oxide or magnesium-aluminum spinel carrier, mixing the carrier with water to form a mixed solution; then ball milling the mixed solution to obtain a colloidal spraying solution; step two, spraying the obtained colloidal spraying solution on the surface of a carrier made of nickel, stainless steel or cordierite; step three, drying the carrier containing the colloidal spraying solution and placing the carrier in an environment above 400 DEG C for calcination; step four, immersing the calcined carrier in a colloidal solution containing a ruthenium salt, the mass fraction of ruthenium metal in the colloidal solution being 0.5-5%, until the content of ruthenium on the surface of the carrier reaches 5-20 g / L, and then taking out and drying. The ammonia decomposition catalyst prepared by the preparation method has good thermal stability and ammonia decomposition activity, and the ammonia decomposition activity can be maintained at 99.5% under high space velocity; the preparation method improves the dispersion degree of noble metal in the catalyst and prolongs the service life of the catalyst.

The present invention relates to a method for preparing a metal (copper, molybdenum, zinc, magnesium, silver) colloidal solution using resonant vibration particle separation and cryogenic freezing technology, which is suitable for multiple fields such as engineering, biology and medicine. The present invention proposes a method for preparing a colloidal solution of any one of copper, molybdenum, zinc, magnesium or silver. According to the present invention, the cleaned metal blank is placed in distilled water or deionized water, and a resonant acoustic treatment is performed using an ultrasonic generator, thereby forming metal nanoparticles. Subsequently, the particles are subjected to cryogenic freezing treatment, followed by controlled cryogenic thawing, to obtain a stable metal colloidal solution with a particle size of 1-10 nm. The proposed method can generate nanoparticles of 5 to 50 nanometers in the resonant fragmentation stage, and can be further reduced to 1-10 nanometers during the cryogenic freezing process. This method can achieve a high-stability colloidal solution without the use of chemical stabilizers, avoid the production of toxic byproducts, and extend the storage period of the colloidal solution to 1 year.

The invention discloses a green hydro-thermal synthesis method of a functionalized silver nano-material, and the preparation method comprises a preparation method of a functionalized silver nano-colloid prepared from a sorbus pohuashanensis fruit extract and a preparation method of functionalized nano-silver solid powder. The invention discloses the green hydro-thermal synthesis method of the functionalized silver nano-material. The spherical nano-silver can stably suspend in a colloidal solution, and the material has the bacteriostatic effect (escherichia coli, staphylococcus aureus and candida albicans) and the effect of rapidly removing methylene blue and rhodamine B dye in water. The nano-silver material is spherical, the particle size of the nano-silver material ranges from 14 nm to 70 nm, and the average particle size of the nano-silver material is 36 nm. The sorbus pohuashanensis fruit extract attached and modified in the nano material accounts for nearly 7.0% of the total mass of the nano material. The green hydrothermal synthesis method is high in safety coefficient, convenient and rapid in operation process, small in pollution or free of pollution and high in repeatability, and the method has application and development potential.

The method comprises the following steps: step 1, etching an Al layer in a Ti2AlC3 MAX phase by using a LiF / HCl system, so as to obtain an Mxene colloidal solution; 2, the TEMPO-oxidized cellulose nanofibril CNF dispersion liquid, the Mxene colloidal solution, calcium lignosulphonate and ferric acetate are sequentially mixed, stirred and subjected to ultrasonic treatment till a uniform mixed suspension is formed, then freeze drying is conducted, and MXene-based lignocellulose aerogel loaded with metal ions is obtained; 3, the MXene-based lignocellulose aerogel loaded with the metal ions is subjected to high-temperature carbonization treatment in inert gas, and the MXene-based lignocellulose derived carbon aerogel wave-absorbing material loaded with the metal nanoparticles is obtained. Multiple scattering of electromagnetic waves is effectively promoted, a rich heterogeneous interface is formed, and the synergistic effect of a dielectric-magnetic loss mechanism is further achieved through introduction of the magnetic metal. Therefore, the problems of poor impedance matching, single component and the like in the preparation process of the wave-absorbing material are solved.

The application develops an application of an electrochemical sensor in metronidazole antibiotic detection, the electrochemical sensor is that graphene oxide nanosheet is placed in a mixed solution of ultrapure water-ethanol, pH value is adjusted to 1-5, ultrasonic is obtained, and a protonated graphene oxide colloidal solution is obtained; platinum chlorate is put into the protonated graphene oxide colloidal solution, and [PtCl6] 2‑ -GO colloidal is prepared after ultrasonic at 2-5 DEG C; [PtCl6] 2‑ -GO colloidal is dropped on the surface of a pretreated electrode, then the electrode is dried, the electrode is placed in a PBS buffer solution after drying, and the electrochemical sensor is obtained by cyclic voltammetry scanning; the electrochemical sensor has high sensitivity, low detection limit and can selectively recognize metronidazole.

The utility model provides a kind of colloidal solution dispersion device with circulating cooling structure, it includes particle grinding assembly, grinding reflux subassembly, solution dispersion subassembly, grinding cooling subassembly, dispersion cooling subassembly and circulating cooling subassembly, the dispersion device is cooled in sections to grinding storage tank by upper section cold cover and lower section cold cover, ensure that temperature is not too high in grinding process, avoid colloidal stability decline, particle agglomeration and other problems, dispersion storage tank is cooled by dispersion cold cover, ensure that temperature is stable in dispersion process, prevent colloidal solution from deterioration due to temperature is too high, by circulating cooling system of cooling unit, grinding cold pipe, dispersion cold pipe, grinding back pipe and dispersion back pipe etc., the circulation supply and recovery of coolant are realized, improve cooling efficiency, reduce energy consumption, adjust valve is set in grinding cold pipe and grinding back pipe, the coolant flow of upper section cooling cavity and lower section cooling cavity can be adjusted according to needs, realize accurate temperature control.

The invention relates to the field of lithium ion batteries, in particular to a preparation method of a flexible porous electrode based on two-dimensional thiophosphate. Two-dimensional thiophosphate (2D MPS3) is used as an active substance, single-walled carbon nanotubes (SWCNTs) are used as a conductive agent, and a melamine porous body is used for providing support for the electrode; the preparation method comprises the following steps: (1) uniformly mixing a 2D MPS3 colloidal solution with SWCNTs slurry; (2) dropwise adding a mixed colloidal solution composed of the 2D MPS3 colloidal solution and the SWCNTs slurry into the melamine porous body; and (3) directly carrying out vacuum drying on the melamine porous body loaded with the mixed colloidal solution at room temperature, wherein the obtained flexible porous electrode shows good electrochemical performance. The preparation method has the advantages of simple process, low cost, easiness in scale amplification and the like, and lays a foundation for application of 2DMPS3 in the flexible lithium ion battery.

This invention discloses a composite material based on "sponge soil" to enhance the water retention and slow evaporation performance of sandy soil, its preparation method, and its application, belonging to the field of sandy soil improvement technology in arid areas. The preparation method includes the following steps: preparing a plant-derived colloidal solution using natural gum powder and a crosslinking agent as raw materials; mixing the plant-derived colloidal solution with a porous matrix material to obtain the composite material based on "sponge soil" to enhance the water retention and slow evaporation performance of sandy soil. This invention constructs a multi-level porous structure of "porous channel water-retaining colloidal network," achieving rapid water absorption and efficient water retention while effectively inhibiting ineffective evaporation and deep seepage of water. This significantly improves the water retention capacity of sandy soil and extends the effective water supply time, providing an environmentally friendly and easy-to-apply improvement method for the ecological restoration of desertified soils. It solves the problems of poor water retention capacity, severe water evaporation and seepage in sandy soils, and the limited functionality and insufficient long-term effectiveness of single improvement materials in existing technologies.

This invention discloses a cefoperazone sodium and sulbactam sodium composition and its preparation method, comprising the following steps: preparing a chitosan-β-glycerophosphate sodium colloidal solution; mixing dry ice and sorbitol evenly, then adding the mixture to the colloidal solution, freezing, heating, and drying under reduced pressure to obtain chitosan-β-glycerophosphate sodium nanospheres; slowly adding cefoperazone sodium, sulbactam sodium, and chitosan-β-glycerophosphate sodium nanospheres to water for injection, stirring to dissolve; adjusting the pH to 7.1-7.5, adding an adsorbent for adsorption and filtration, adding dry ice; freeze-drying to obtain a cefoperazone sodium and sulbactam sodium mixed powder. The nanospheres of this invention, with a certain size gradient, are beneficial for the uniformity of the mixed powder of cefoperazone sodium and sulbactam sodium, resulting in a longer-lasting efficacy, better stability, lower hygroscopicity, and also playing an antibacterial role.