48 results about "Colloidal Solution" patented technology

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.

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.

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.

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 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 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.

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.

This invention discloses a method for preparing a highly active and highly stable iridium oxide catalyst, comprising the following steps: adding a slow-release alkali to an aqueous solution of an iridium source and stirring to obtain an iridium-hydroxy colloidal solution; adding a sulfate solution to the iridium-hydroxy colloidal solution, stirring to obtain a slow-release acid, and stirring until a fine precipitate is obtained; washing, filtering, and drying the precipitate, followed by staged heat treatment to obtain a highly active and highly stable iridium oxide catalyst. The iridium oxide catalyst exhibits a high activity / stability at 1 A / cm². 2 Under these conditions, the electrolysis voltage of a single cell reaches 1.599–1.612 V; 2 A / cm 2 Under these conditions, the electrolysis voltage of a single cell reaches 1.746–1.759 V; 3 A / cm 2 Under these conditions, the electrolysis voltage of a single cell reaches 1.885–1.896 V, exhibiting excellent catalytic activity; moreover, stability testing showed no degradation after 500 h, demonstrating good stability. In other words, this catalyst achieves simultaneous improvement in both activity and stability.

The application relates to a biomimetic hydrogel-based connective tissue and a preparation method and application thereof, and belongs to the technical field of plant-based food processing. In view of the defects of single taste and lack of real meat connective tissue feeling of existing plain meat products, a continuous phase component (containing plant protein, water-soluble dietary fiber and ferulic acid) is mixed with a pH-activated plant polysaccharide colloidal solution (containing a glucan gum, a galactomannan gum and a fucoidan gum); then, calcium ions and transglutaminase are introduced in sequence to trigger ion crosslinking and enzymatic crosslinking in sequence; and finally, a heat curing treatment and cold storage curing are carried out to obtain a biomimetic hydrogel-based connective tissue which is excellent in mechanical property, uniform in texture, high in water holding property and stable in heat. The biomimetic hydrogel-based connective tissue prepared by the application can be used for developing a new generation of high-end plant-based meat products.

The application provides a preparation method of a flexible thin film electrode based on a multivalent transition metal oxide modified MXene, and comprises the following steps: S1, placing MAX raw materials into acid liquor for etching, and then performing intercalation treatment to obtain an MXene colloidal solution; S2, adding a transition metal oxide dispersion liquid into a reaction kettle to perform a hydrothermal reduction reaction to obtain a multivalent transition metal oxide colloidal solution; and S3, mixing the MXene colloidal solution and the multivalent transition metal oxide colloidal solution, stirring and reacting, and then forming a film to obtain a flexible thin film electrode. The flexible thin film electrode prepared by the application has good mechanical flexibility and electrochemical performance. The multivalent transition metal oxide is stably combined with the MXene, effectively alleviates the problem of the re-stacking of two-dimensional MXene nanosheets, increases the number of active sites, and further improves the electrochemical activity, and the comprehensive performance is excellent.

This invention discloses an oxygen reduction reaction catalyst, its preparation, and its application. The catalyst comprises a layered structure formed by an array of hollow carbon nanocages loaded with p-doped metal single atoms. The preparation method involves: dissolving a zinc salt and a second metal salt in water to obtain a metal source solution; mixing the metal source solution with an aqueous solution of 2-methylimidazole to obtain metal-organic framework nanoparticles; dispersing the metal-organic framework nanoparticles and a phosphorus-containing etchant capable of thermally decomposing to generate ammonia in water to form a mixed colloidal solution; freeze-drying the mixed colloidal solution to obtain a layered precursor; and calcining the layered precursor to obtain the oxygen reduction reaction catalyst. This catalyst can be applied to electrochemical oxygen reduction testing and the preparation of proton exchange membrane fuel cells and zinc-air batteries. The catalyst prepared by this invention exhibits good mass transfer performance and a high specific surface area, significantly improving the accessibility of active sites and possessing excellent electrocatalytic performance.

The present application relates to a kind of renewable hydrogen sulfide removing agent and its preparation method and application, the renewable hydrogen sulfide removing agent with silica alumina gel as carrier, by loading aluminium hydroxide colloidal solution to silica alumina gel carrier, continue water vapor aging makes aluminium gel and carrier secondary combination, thereby obtains the hydrogen sulfide removing agent with more concentrated pore size distribution, active adsorption site is more abundant.The removing agent is suitable for the removal of hydrogen sulfide in hydrocarbon organic medium, the use condition range is that hydrogen sulfide concentration is less than 1000ppm, removal precision is less than 0.1ppm.When saturated with hydrogen sulfide, the scavenger can be regenerated under the purge of oxygen-free atmosphere, restore removal capacity, regeneration temperature is 250~300 ℃.Compared with prior art, the hydrogen sulfide removing agent prepared in the present application has more prominent hydrogen sulfide removal capacity, adsorption capacity is increased by 3-5 times, and regeneration cycle is prolonged by 2-5 times.

This invention belongs to the field of materials preparation technology, specifically a method for preparing colloidal solutions of compound quantum dots using liquid-phase laser irradiation technology. The method first uses liquid-phase laser irradiation to obtain a colloidal solution of compound quantum dots, then removes the solvent using vacuum distillation to obtain the compound quantum dots. This invention achieves controllable preparation of compound quantum dots by adjusting laser irradiation parameters, reaction time, reaction temperature, and solvent type. This invention solves the problems of rapid, controllable, and large-scale preparation of compound quantum dots, providing a novel and universal strategy for their preparation, which will help promote the further development of compound quantum dots in optoelectronics, energy storage, and catalysis.

The application relates to a modified two-dimensional material film and a preparation method and application, comprising a two-dimensional material film, the two-dimensional material film is subjected to electron beam irradiation; the irradiation dose of the electron beam irradiation is 5 kGy; the preparation steps of the two-dimensional material film are as follows: a solution of two-dimensional material powder is ultrasonically dispersed, the supernatant colloid with single-layer two-dimensional material lamella in the upper layer is taken as experimental material; the colloid solution is added into deionized water to dilute the solution concentration, and a glass rod is used to stir and uniformly mix; a polyether sulfone film with a pore size of 0.2 mu m and a diameter of 50 mm is used as a base film, the base film is placed on a vacuum filtration device, the diluted colloid solution is poured into the vacuum filtration device, water is pumped away through the vacuum filtration device, and the two-dimensional material is deposited on the base film to obtain a two-dimensional material film. The electron beam irradiation technology is a stable and convenient modification method, has good irradiation effect on the two-dimensional material, and according to different irradiation times, the two-dimensional film material with different strong and weak inductive effects is obtained.

A sensing film of an X-ray image sensor includes a multilayer colloidal halide perovskite nanocrystal, wherein different layers of the colloidal halide perovskite nanocrystal have different crystal sizes. A method for manufacturing a sensing film of an X-ray image sensor includes preparing several colloidal solutions and then spraying the colloidal solutions to form a multilayer colloidal halide perovskite nanocrystal. Each of the colloidal solutions includes halide perovskite nanocrystals of different crystal sizes.

The application belongs to the technical field of perovskite nanocrystal synthesis, and particularly relates to a method for preparing high-polarization inorganic perovskite heterojunction nanorods by using nanowires and application of the method to optoelectronic devices. The method comprises the following steps: (1) mixing a monovalent cation compound, a halide BX2, a ligand, a weakly polar or non-polar organic solvent, and an acidic aqueous solution, continuously ultrasonicating or stirring at room temperature, and reacting; after standing, mixing the upper solution with the weakly polar or non-polar solvent, adding the halide, and continuously stirring and reacting, so as to obtain a colloidal solution of inorganic perovskite heterojunction nanorods; centrifuging, discarding the supernatant, and drying in a vacuum drying box, so as to obtain perovskite nanorod powder. The prepared nanorods have high quantum efficiency, the intermediate process can be monitored, so that the growth process can be more accurately tracked, and the length-diameter ratio of the nanorods can be finally accurately controlled.

The present application relates to the technical field of animal feed, and particularly relates to an organic selenium feed additive for preventing and treating abnormal feeding of cattle and sheep and a preparation method thereof.The organic selenium feed additive provided by the present application, on the one hand, utilizes the synergistic effect of atractylodes, radix codonopsis, atractylodes rhizome, dried tangerine or orange peel, liquorice and angelica to help the recovery of the damaged digestive system of cattle and sheep; on the other hand, the addition of organic selenium and chondroitin sulfate can promote the growth and recovery of the damaged digestive system; further, the present application utilizes the colloidal solution formed by collagen and acetic acid aqueous solution to ensure the stability of uniform distribution of components, improve the adhesion of the organic selenium feed additive to the inner wall of the digestive system of cattle and sheep, and prolong the action time.Through the above-mentioned approaches, the organic selenium feed additive provided by the present application can obviously shorten the treatment cycle of abnormal feeding of cattle and sheep, and can realize the normal activity and feeding of cattle and sheep in 6-8 days, and the effect is obviously improved compared with the prior art and single component.

This invention belongs to the field of superhydrophobic technology and discloses a superhydrophobic ceramic membrane based on zinc oxide nanoflowers and its preparation method. Addressing the problems of poor coating stability, complex and time-consuming processes, and difficulty in large-scale production in existing processes, this invention first prepares zinc oxide nanoflower powder with regular morphology by a solvent mixture of deionized water and ethylene glycol, supplemented with zinc acetate and urea, through a solvothermal reaction, washing, drying, and calcination annealing. Then, a silica colloidal solution and a zinc oxide dispersion are prepared separately, mixed in a certain proportion to form a film solution, and deposited onto the surface of a ceramic support using a dip-coating method. Finally, the film is modified with silane to obtain the finished product. This invention separates powder preparation from membrane loading, resulting in a simple and easy-to-operate process with a short production cycle. The resulting ceramic membrane forms a silica network and a zinc oxide nanoflower bridging structure internally, and possesses a low surface energy hydrophobic interface, exhibiting excellent superhydrophobic, self-cleaning, and anti-fouling properties. The membrane adheres firmly and has good durability, making it suitable for large-scale production and widely applicable in water treatment scenarios.

This application provides a caviar-encased cheese popping pearl and its preparation method. The caviar-encased cheese popping pearl includes popping pearl particles and a protective liquid. The popping pearl particles include an inner core and a colloidal solution. The inner core includes the following components in the indicated mass percentages: calcium lactate 1%-2%, calcium chloride 0.05%-0.1%, white sugar 20%-30%, guar gum 0.01%-0.03%, xanthan gum 0.1%-0.2%, gellan gum 0.01%-0.05%, cream cheese 10%-20%, citric acid 0.2%-0.4%, and caviar 2%-5%, with the balance being water. By using a combination of xanthan gum, guar gum, and gellan gum, caviar can adhere to popping boba particles using the compounded colloids. Gellan gum provides good viscosity and gel strength. When used in combination with xanthan gum and guar gum, the viscosity of xanthan gum has a synergistic effect on the entire colloid system. By controlling the amount of guar gum, xanthan gum, and gellan gum, the adhesion of caviar particles can be ensured, while preventing excessive gellan gum from hardening the surface of the popping boba and ensuring the taste of the finished product.

This invention discloses a bifunctional MOF-encapsulated metal catalyst, its preparation method, and its application. The preparation includes: dissolving an iron precursor and a bifunctional ligand in a mixture of N,N-dimethylformamide and formic acid; obtaining a bifunctional MOF through a solvothermal reaction; activating the MOF; dispersing it in a colloidal solution of noble metal nanoparticles; stirring and mixing; and removing the solvent to obtain the catalyst. In this invention, the MOF is prepared via a solvothermal synthesis-liquid-phase reduction deposition method, and noble metal nanoparticles are encapsulated within it. This catalyst can synthesize H2O2 in situ as an oxidant. Subsequently, the high electron density metal active centers modified with the two functional groups can efficiently and rapidly decompose the H2O2 enriched within the catalyst framework, thereby efficiently activating methane. When applied to the partial oxidation of methane to methanol, a high methanol yield can be obtained.

The present disclosure provides a method for manufacturing porous activated carbon microspheres, which at least includes the following steps. A phenolic resin colloidal solution, a surfactant and a dispersion medium are uniformly dispersed to form a mixture, in which the surfactant has at least three branched lipophilic groups. The mixture is heated to solidify to form a plurality of resin microspheres. A carbonization process and an activation process are performed to the resin microspheres to form a plurality of porous activated carbon microspheres.

The application belongs to the technical field of material preparation, and particularly relates to a method for preparing zero-dimensional oxide nanoparticles by adopting a liquid-phase laser irradiation technology; the method comprises the following steps: obtaining an oxide superfine nanoparticle colloidal solution by adopting the liquid-phase laser irradiation technology, and removing a solvent by adopting a reduced-pressure distillation technology to obtain the zero-dimensional oxide nanoparticles; the oxide involved includes binary and multi-element oxides, and is suitable for various metal and non-metal oxides; and by adjusting laser irradiation parameters, reaction time and types of the oxide and the solvent, controllable preparation of the zero-dimensional oxide nanoparticles can be realized. The application solves the problems of difficulty in fast controllable and large-scale preparation of the zero-dimensional oxide nanoparticles, provides a brand-new universal strategy for preparation of the zero-dimensional oxide nanomaterials, and is helpful to further development of the zero-dimensional oxide materials in the fields of photoelectricity, energy storage and catalysis.

This invention relates to the field of microplastic adsorbent materials technology, specifically to a calcium alginate composite modified biochar gel ball, its preparation process, and its application. The process includes the following steps: Sugarcane bagasse powder is mixed with iron salt and an activator in a specific ratio and stirred thoroughly. The mixture is placed in a tube furnace, and a nitrogen protective atmosphere is introduced. The furnace is then heated for pyrolysis, and cooled to room temperature under nitrogen protection. The solid product is removed, washed, filtered, dried, and sieved to obtain magnetically modified biochar. Sodium alginate and carrageenan are added to deionized water and stirred until fully dissolved to form a homogeneous colloidal solution. Magnetically modified biochar is added, and the solution is ultrasonically dispersed and stirred to obtain a mixed colloid. The mixed colloid is then added dropwise to a CaCl2 solution for cross-linking and curing. The gel balls are removed and washed with deionized water to obtain calcium alginate composite modified biochar gel balls.