4564results about "Microcapsule preparation" patented technology

The invention relates to the technical field of functional materials, in particular to a hollow multi-shell material as well as a low-temperature preparation method and application thereof, which comprises the following steps: 1) mixing a water or alcohol solution of a precursor A with an oil phase to prepare a water-in-oil emulsion, or dispersing the water solution of the precursor A into liquid drops by a spraying method; 2) freezing the emulsion or liquid drops obtained in the step 1) at low temperature to obtain ice template particles containing a precursor A; (3) adding the ice template particles obtained in the step (2) into a precursor B solution, controlling the temperature by a program, melting the ice template, and carrying out precipitation or polymerization reaction on A and B to obtain metal fluoride, carbonate or other hollow multi-shell materials; and 4) using the hollow multi-shell layer obtained in the step 3) as an electrolyte additive. The electrolyte additive can improve the viscosity of an electrolyte, improve the ionic conductivity, stabilize a solid electrolyte interface film, effectively inhibit the growth of lithium dendrites, improve the coulombic efficiency of a battery and prolong the cycle life of the battery.

The invention discloses a culture method of anaerobic ammonia oxidation granular sludge with a polydopamine modified charcoal-loaded Fe-Cu sodium alginate microsphere kernel, which comprises the following steps: modifying charcoal by using polydopamine, then carrying out Fe-Cu ion loading, finally preparing sodium alginate microspheres, and taking the prepared sodium alginate microspheres as the kernel to prepare the anaerobic ammonia oxidation granular sludge with the polydopamine modified charcoal-loaded Fe-Cu sodium alginate microsphere kernel. And co-culturing the sodium alginate microspheres and activated bacillus DMF-4 in an oxygen-free environment, continuously culturing for 3 weeks, and collecting by using a gravity settling or centrifugal method to obtain the anaerobic ammonium oxidation granular sludge with the sodium alginate microsphere core. The sodium alginate microspheres serving as the core provide large density and good morphological support for sludge particles, the problem of sludge bulking is avoided, and the settling performance is improved. According to the present invention, the sludge anti-shearing performance is improved, the adsorption capacity of the slowly released and continuously slowly released iron ions on organic matters, ammonia nitrogen and heavy metals is enhanced, the sewage treatment effect is improved, and the iron ions are the biodegradable material so as not to cause secondary pollution in the use process.

The invention discloses crack-chloride ion double-triggered subsea tunnel corrosion-resistant concrete and a preparation method thereof, and relates to the field of subsea tunnel engineering materials. The concrete is prepared from the following components in parts by weight: 400 to 500 parts of Portland cement, 50 to 80 parts of fly ash, 60 to 100 parts of superfine mineral powder, 1000 to 1100 parts of coarse aggregate, 700 to 800 parts of fine aggregate, 140 to 160 parts of water, 10 to 20 parts of self-repairing microcapsules and 1 to 5 parts of a water reducing agent, the self-repairing microcapsule comprises a capsule wall material, a self-repairing material and a layered dihydroxyl composite metal oxide. A crack-chloride ion double-response system is constructed, and the limitation of traditional single trigger repair is broken through. When a crack with a certain width appears in the concrete, the capsule wall of the self-repairing microcapsule is broken to release the repairing component, so that effective filling of the crack is realized; and meanwhile, the layered double-metal hydroxide can directionally adsorb chloride ions to form a stable compound, so that the migration rate of the chloride ions is remarkably reduced.

The invention provides a large-scale culture method of NK cells and an adopted culture medium, and belongs to the technical field of NK cell culture. And adding fetal calf serum, penicillin, streptomycin and the stimulation amplification promotion magnetic microspheres into the ACTM culture medium, and uniformly stirring and mixing to obtain the culture medium. The large-scale culture method of the NK cells can efficiently activate and amplify the NK cells, is free of exogenous serum and autoserum, safe and effective, can well promote proliferation of the NK cells and prolong the activity of the NK cells, is safe and free of side effects, and has a wide application prospect.

The invention discloses equipment and a method for preparing spray condensation microcapsules, and relates to the technical field of spray condensation microcapsule preparation, the equipment comprises a melting homogenizing kettle and a condensing tower, a spray head is arranged in the condensing tower, and a movable spray mechanism used for enabling the spray head to move circumferentially and swing back and forth at the same time is mounted on the condensing tower. Through the arrangement of the movable spraying mechanism, the spraying head can spray material liquid drops in the condensing tower in a back-and-forth swinging manner while moving circumferentially, so that the material liquid drops can be uniformly dispersed in a wider area and can be in contact with more cold air, local supercooling or superheating is avoided, and a more uniform cooling effect is obtained; meanwhile, through the matched arrangement of the spiral blades, cooling airflow can spirally flow and be uniformly distributed, the gas-liquid contact area is increased, the gas-liquid contact time is prolonged, gas-liquid exchange is more sufficient, finally, it can be ensured that each material liquid drop can be sufficiently cooled, and the embedding efficiency and the quality of microcapsules are effectively improved.

The invention provides methods for the preparation of particles including one or more agents, e.g., therapeutic or diagnostic agents. The particles can be formed by creating droplets of a first liquid, e.g., including an agent, and removing the first liquid, e.g., through its dispersal in a second liquid and / or evaporation, to solidify the droplets. Advantageously, the process of forming the particles does not significantly alter the structure or activity of the agents and may enhance the stability of the agents. For example, the particles may be stored for long periods of time without significant loss of activity, and in some embodiments, without the need for refrigeration. These particles may be used to generate stabilized pharmaceutical compositions for storage or other logistical purposes, pharmaceutical suspensions, pharmaceutical powder formulations (e.g., inhalable powders, injectable powders), creams or other topical pastes, nutraceuticals, or cosmetics.

A core-shell particle having an organic polymer core which is completely covered by a first inorganic oxide shell, wherein the first inorganic oxide shell has a silica (SiO2), an alumina (Al2O3), or a titania (TiO2); wherein the first inorganic oxide shell has a layer of a magnetic material which is disposed directly on the polymer core; further having a mesoporous second inorganic oxide shell, wherein the mesoporous second inorganic oxide shell covers the first inorganic oxide shell; wherein the mesoporous second inorganic oxide shell has silica (SiO2), alumina (Al2O3), or a titania (TiO2).

The invention discloses a method for preparing lubricating oil microspheres based on a microfluidic technology. The method comprises the following steps: preparing an external phase solution, an intermediate phase solution, an internal phase solution and a collection solution; firstly, the internal phase solution is introduced into the micro-fluidic chip, and after the flow of the internal phase solution is stable, the intermediate phase solution is introduced into the micro-fluidic chip to be sheared with the internal phase solution to form nuclear layer liquid drops. After the core layer liquid drops are generated stably, the external phase solution is introduced into the micro-fluidic chip to be sheared with the core layer liquid drops, so that the external phase solution wraps the outer layer of the core layer to form a shell layer with a core-shell structure, and then the double liquid drops are dropped into a collecting solution containing glutaraldehyde to be crosslinked and cured to form the chitosan lubricating oil microspheres. The chitosan lubricating oil microsphere has the following beneficial effects that the lubricating oil is wrapped in the microsphere through a microfluidic technology, so that the chitosan lubricating oil microsphere is of a core-shell structure, and when the lubricating oil is needed, the lubricating oil in the microsphere is released to improve the friction performance of parts.

The invention relates to the technical field of fire extinguishing materials, and discloses an active fire extinguishing microcapsule, a preparation method and application thereof, an ultraviolet curing resin plate and a preparation method thereof. The microcapsule has a core-shell structure, a core material is perfluoro (2-methyl-3-pentanone) (PFMP), and the microcapsule is used as an efficient fire extinguishing agent and is suitable for inhibiting the heat rise rate of an ultraviolet curing polymer in thermal runaway and fire scenes; and the shell layer is a polymer wall material formed by gelatin, has a certain thickness and can be broken at a preset temperature. Through simple condensation, PFMP is used as a core material for microencapsulation, and the microcapsule with specific particle size distribution is prepared, so that the microcapsule can quickly release a fire extinguishing agent under a high-temperature condition, and flames are effectively inhibited.

The invention provides methods for the preparation of particles including one or more agents, e.g., therapeutic or diagnostic agents. The particles can be formed by creating droplets of a first liquid, e.g., including an agent, and removing the first liquid, e.g., through its dispersal in a second liquid and / or evaporation, to solidify the droplets. Advantageously, the process of forming the particles does not significantly alter the structure or activity of the agents and may enhance the stability of the agents. For example, the particles may be stored for long periods of time without significant loss of activity, and in some embodiments, without the need for refrigeration. These particles may be used to generate stabilized pharmaceutical compositions for storage or other logistical purposes, pharmaceutical suspensions, pharmaceutical powder formulations (e.g., inhalable powders, injectable powders), creams or other topical pastes, nutraceuticals, or cosmetics.

The invention discloses a high-temperature-resistant astaxanthin microcapsule and a preparation method and application thereof, and relates to the field of nutritional products, the microcapsule comprises: a, a core material: astaxanthin oil selected from haematococcus pluvialis or krill oil; b, double-layer wall materials: an inner-layer wall material is formed by crosslinking sodium alginate and whey protein through an ionic gel method; the outer-layer wall material is formed by electrostatic adsorption of chitosan and Arabic gum; and c, an antioxidant synergist: a rosemary extract. A double-layer embedding structure is adopted outside astaxanthin oil, sodium alginate on the inner layer is combined with whey protein to form a compact network structure through ionic bonds, chitosan on the outer layer and Arabic gum form a compact composite film on the surface of a primary embedded microsphere through electrostatic attraction, so that the double-layer embedded microcapsule has the advantages that the astaxanthin oil has good stability, and the astaxanthin oil has good stability. The temperature resistance limit of a traditional single-layer microcapsule is broken through, the stability of the astaxanthin in a high-temperature baking environment is remarkably improved, the astaxanthin can stably exist in high-temperature baked food, and the anti-oxidation effect and the like of the astaxanthin are fully exerted.

The invention relates to the technical field of high polymer materials, and provides a controllable dissolution microsphere preparation method based on sodium alginate and pectin, which comprises the following steps: obtaining a sodium alginate solution and a pectin solution, mixing the sodium alginate solution and the pectin solution based on a first preset proportion, and uniformly stirring and mixing by using preset stirring equipment, mixing a pre-constructed calcium chloride aqueous solution and absolute ethyl alcohol based on a second preset proportion, uniformly stirring and mixing through stirring equipment to obtain a cross-linking agent solution, dropwise adding the mixed gel solution into the cross-linking agent solution through a preset dropwise adding method, obtaining mixed gel beads in the cross-linking agent solution, and drying the mixed gel beads in a drying oven to obtain the hydrogel. And washing the mixed microgel beads to obtain the controllably dissolved microspheres. The invention mainly aims to solve the problems that pectin microspheres are different in shape and low in mechanical strength and are not suitable for cell culture and sodium alginate microspheres are still long in dissolving time when the concentration of a dissolving agent is high, and meanwhile, the microspheres which are high in pelletizing rate and controllable in dissolution are prepared.

The invention relates to the technical field of phase change microcapsules, in particular to a polyurea / polyacrylate double-layer shell material phase change microcapsule and a preparation method thereof. The microcapsule sequentially comprises a phase change material core material, a polyacrylate shell material and a polyurea shell material from inside to outside, and is prepared from the following raw materials: a polyisocyanate monomer, an acrylate monomer, an acrylate functional monomer, an acrylate cross-linking agent, a chain extender, an initiator, a surfactant, a phase change material and water. According to the invention, polyurea interfacial polymerization and polyacrylate suspension polymerization are combined to form a double-layer shell material for coating to prepare the phase change microcapsule, so that the phase change microcapsule has excellent sealing property, durability and high enthalpy value performance.

The present invention belongs to the field of microbead preparation technology, and specifically relates to a microbead production process with adjustable internal phase based on microfluidic technology and its application. The microbead production process includes the following steps: (1) raw material transportation: the required materials are transported to the microfluidic chip separately through a pump under heat preservation conditions; (2) logistics shearing: the required materials are sheared in the microfluidic chip to obtain composite droplets; (3) cooling and molding: after the sheared droplets are cooled, they are cooled and solidified using a cooling medium to form microbead particles; (4) product collection: the microbead particles and the cooling medium are subjected to solid-liquid separation, filtered, and collected to obtain microbeads. The microbead production process of the present invention can quickly realize the continuous production of double-layer microbeads, realize the precise regulation of the inner layer of the double-layer microbeads, and quickly and accurately control the particle size of the microbeads; at the same time, it can quickly realize the production conversion between single-layer microbeads and double-layer microbeads.

The invention discloses water-based anti-forgery ink, a preparation method thereof, an obtained printed matter and application thereof, and relates to the technical field of printing forgery prevention. The water-based anti-forgery ink comprises the following components in percentage by mass: 15%-30% of water-based resin, 5%-20% of acrylic resin, 0.5%-10% of an auxiliary agent, 2%-5% of a first fluorescent developing substance, 3%-10% of a first microcapsule and the balance of water, a capsule core of the first microcapsule contains a second fluorescent color developing substance, a capsule shell is made of a first temperature-sensitive high polymer material, and the first temperature-sensitive high polymer material is subjected to reversible phase transformation at a first threshold temperature T1; the second fluorescent color-developing substance is different from the first fluorescent color-developing substance. According to the invention, multiple hidden anti-counterfeiting mechanisms are arranged and can be triggered under specific conditions, so that the cracking difficulty is increased; and the anti-counterfeiting verification requirements in some important occasions can be met.

The invention relates to the field of building material preparation, in particular to a high-strength concrete material and a preparation method thereof.According to the high-strength concrete material, through the synergistic effect of core-shell type temperature-sensitive resin particles, a pH response type expanding agent and industrial solid waste composite micro powder, multi-environment self-adaptive crack resistance and mechanical property breakthrough are achieved. The core component is prepared from 180 to 240 parts of cement, industrial solid waste composite micro powder (30 to 50 parts of fly ash-based nano SiO2 and 50 to 70 parts of steel slag micro powder), 10 to 15 parts of core-shell resin particles and 8 to 12 parts of pH response type expanding agent. According to the preparation process, multi-section intelligent stirring (ultra-high-speed shearing and dispersing of the nanometer material) and dynamic maintenance of the internet of things are adopted, the hydration process is precisely regulated and controlled, and the finally prepared material has excellent compressive strength and anti-cracking performance. The method is suitable for severe scenes such as ocean engineering and plateau buildings, and has wide application prospects.

The invention belongs to the field of material preparation and chemical engineering, and particularly relates to an N-doped modified MOFs (Metal-Organic Frameworks) derived core-shell nanoreactor as well as a preparation method and application thereof. The preparation method comprises the following steps: taking cobalt as a node metal, synthesizing an N-doped modified MOFs material with an organic ligand and a nitrogen source through a hydrothermal reaction, then coating the surface of the material with porous silicon dioxide, and preparing the N-doped modified MOFs derived core-shell nanoreactor through a two-step calcination method. The MOFs derived core-shell nanoreactor prepared by the invention has a large specific surface area, a rich pore structure and excellent catalytic activity and stability, and is high in catalytic activity, good in recycling stability and suitable for large-scale popularization and application when being used as a catalyst for alpha, beta-unsaturated aldehyde transfer hydrogenation.

Bead-in-particles formats and their use in cytometric applications are described. In one aspect, the disclosure provides a bead-in-particle comprising an outer hydrogel body and an inner hydrogel bead. As described herein, the bead-in-particle is selectively tuned to have at least one morphological property substantially similar to subcellular macrostructures of interest present in a target cell. In one aspect of the disclosure, the bead-in-particle are used as a calibration reagent for the detection of a target cell in a sample, such as by image-based flow cytometry.

The invention belongs to the technical field of microbead preparation, and particularly relates to a microbead production process with an adjustable internal phase based on a microfluidic technology and application of the microbead production process. The micro-bead production process comprises the following steps: (1) conveying raw materials: respectively conveying required materials to a micro-fluidic chip through a pump under a heat preservation condition; (2) material flow shearing: shearing the required material in the micro-fluidic chip to obtain composite liquid drops; (3) cooling and forming: cooling and curing the sheared liquid drops by using a cooling medium after the sheared liquid drops are cooled, so as to form microbead particles; and (4) product collection: carrying out solid-liquid separation on the microbead particles and a cooling medium, filtering, and collecting to obtain the microbeads. According to the microbead production process disclosed by the invention, continuous production of double-layer microbeads can be quickly realized, accurate regulation and control of inner layers of the double-layer microbeads are realized, and the particle sizes of the microbeads are quickly and accurately controlled; and meanwhile, the production conversion of single-layer microbeads and double-layer microbeads can be quickly realized.

The invention relates to the technical field of self-thermal-insulation mortar, in particular to self-thermal-insulation mortar and a preparation method thereof. Comprising the following components: Portland cement, a gradient graphene aerogel skeleton, metal organic framework nanoparticles, photo-thermal-phase change coupling microcapsules, magnetic field orientation Fe3O4 nanosheets, self-repairing microcapsules, silicon carbide nanowire aerogel, a water reducing agent and a fiber reinforced material. The gradient graphene aerogel skeleton, the photo-thermal-phase change coupling microcapsules and other materials with excellent thermal insulation performance are introduced, and a multi-layer thermal insulation structure is constructed. The gradient graphene aerogel skeleton has extremely low heat conductivity coefficient and high porosity, and can effectively prevent heat transfer; the photo-thermal-phase change coupling microcapsules can absorb and release a large amount of heat in the phase change process, and the heat preservation effect of the mortar is further improved.

The invention relates to the technical field of food, and particularly discloses a compound prebiotics embedded probiotic microcapsule and a preparation method and application thereof.The green tea leaves serve as main raw materials, water extraction is conducted on the green tea leaves, meanwhile, ultrasonic-assisted treatment is adopted, active ingredients in the green tea leaves can be more effectively released, the extraction time is shortened, and the content of probiotics in the green tea leaves is increased; the extraction rate of active ingredients in the green tea leaves is improved; then, lactobacillus acidophilus is adopted to ferment the extract liquid, so that the green tea fermentation liquid contains more antioxidant active ingredients, combined polyphenol in the extract liquid can release micromolecular polyphenol in the fermentation process, the content of substances such as flavone and polyphenol in the green tea fermentation liquid is increased, and the antioxidant activity is further improved; and then the modified dietary fiber is used as a main wall material of the microcapsule to embed the green tea fermentation liquor and the probiotics, so that the stability of active substances and the probiotics in the green tea fermentation liquor is improved, and the green tea fermentation liquor can play a role in protection and slow release in the simulated digestion process.

The invention relates to the technical field of thermochromic materials, and discloses a thermochromic phase change energy storage microcapsule as well as a preparation method and application thereof. The thermochromic phase change energy storage microcapsule comprises the following preparation raw materials: a core material, a Pickering emulsion template and a wall material, the core material comprises the following components: a leuco agent, a color developing agent and a phase change material; the stable particles of the Pickering emulsion template comprise cellulose nanocrystals; the wall material comprises a resin prepolymer. According to the thermochromic phase change energy storage microcapsule, the cellulose nanocrystals serve as Pickering emulsion stable particles, raw materials are easy to obtain, and the thermochromic phase change energy storage microcapsule is good in stability, good in coating effect, environmentally friendly, free of pollution, sensitive in temperature response, reversible in color change, wide in color change and energy storage temperature interval, good in thermal stability of materials and good in energy storage performance. The preparation method of the material is simple in steps and easy to operate, large-scale production is easy to realize, and the thickness of the microcapsule shell layer can be changed by changing the adding amount of the resin prepolymer.

The present disclosure relates to methods that enable the continuous formation of droplets and dehydration of droplets to provide pharmaceutically relevant particles that can be used for therapy. In particular, the methods disclosed herein allow the controlled continuous droplet formation and dehydration that produce circular particles having low internal void spaces comprising bioactive therapeutic biologies.

The invention discloses a flame retardant with a double-layer microcapsule structure, a flame-retardant polyurethane material as well as a preparation method and application of the flame-retardant polyurethane material, and belongs to the technical field of flame retardants. The material is a multifunctional flame retardant with a double-layer core-shell structure, a shell layer is calixarene boric acid resin, a middle shell layer is melamine phthalic anhydride resin, and a core layer is hydroxyapatite modified aluminum hypophosphite. Due to the high cross-linking degree between polymers, the flame retardance of polyurethane is improved, meanwhile, the mechanical property of the polyurethane is improved, and the flame retardance and seawater corrosion resistance of the material are synergistically enhanced through hydroxyapatite dispersed in the core layer. The double-shell layer has excellent hydrophobicity, prevents internal aluminum hypophosphite from being affected with damp and has anti-fouling and self-cleaning effects, and the prepared flame-retardant polyurethane composite material has excellent tensile and flexible characteristics due to a double network of hydrogen bonds and covalent bonds.

The invention relates to a self-repairing polyurethane microcapsule as well as a preparation method and application thereof, and relates to the technical field of new materials. The microcapsule is mainly prepared from the following raw materials in parts by weight: 10 to 50 parts of polyisocyanate, 40 to 60 parts of oligomer polyol, 50 to 70 parts of a surfactant, 10 to 40 parts of a core material, 1 to 10 parts of a disulfide compound and 30 to 50 parts of a solvent. The self-repairing polyurethane microcapsule can recover the shape before damage under a heating condition, so that a wound is closed autonomously, and self-adaptive repairing of the damage is facilitated.

The invention discloses an egg rich in DHA nutrient and a production method of the egg. The production method of the eggs rich in the DHA nutrient comprises the following steps: during the egg laying period of laying hens, feeding the laying hens with a laying hen feed continuously for more than 15 days to obtain the eggs rich in the DHA nutrient, the feed comprises corn flour, fermented soybean meal, shell powder, seabuckthorn seed meal, a premix and corn oil. The premix is prepared from the following raw materials in parts by weight: 40 to 50 parts of puffed corn flour, 30 to 40 parts of compound DHA (docosahexaenoic acid) microcapsules, 2 to 4 parts of krill meal, 2 to 4 parts of sea cucumber freeze-dried powder, 2 to 5 parts of cotton seed oligosaccharide, 0.5 to 2 parts of DL-methionine, 0.2 to 2 parts of trace element premix, 0.02 to 0.04 part of vitamin A acetate and 0.2 to 0.4 part of vitamin D3. The DHA content of the egg yolk of the egg produced by the method disclosed by the invention can be more than 250mkg / 100kg, and the enrichment of the DHA of the egg yolk is effectively realized.

The utility model discloses a device for preparing a double-droplet microsphere. The device comprises a fluid injection unit, a liquid injection unit and a control unit, the micro-fluidic chip comprises a cover glass, one side of the cover glass is provided with a dispensing needle a, the dispensing needle a is connected with an internal phase glass capillary tube, the internal phase glass capillary tube is partially nested in an intermediate phase glass capillary tube, the intermediate phase glass capillary tube is partially nested in an external phase glass capillary tube, and the external phase glass capillary tube is connected with the external phase glass capillary tube. A dispensing needle b is vertically arranged above one end, which is overlapped with the inner phase glass capillary, of the intermediate phase glass capillary, and a dispensing needle c is vertically arranged above one end, which is overlapped with the intermediate phase glass capillary, of the outer phase glass capillary; and a micro-droplet collection unit. According to the utility model, through the coaxially arranged glass capillary tube and the dispensing needle head communicated with the glass capillary tube, the double-droplet microsphere is prepared, meanwhile, the groove is formed in the dispensing needle head, so that the construction of a coaxial glass capillary tube micro-fluidic chip is facilitated, the preparation equipment is simple, and the operation is simple.

The invention discloses a preparation method of a phase change microcapsule with a photothermal conversion function. The preparation method comprises the following steps: firstly, constructing a non-aqueous dispersion type oil-in-water emulsion system, then carrying out interfacial polycondensation reaction on a silicon dioxide precursor on the surface of a paraffin micelle, carrying out amination modification on the prepared phase change microcapsule, and packaging the phase change microcapsule by graphene oxide under the mutual attraction action of charge action, thereby realizing the photothermal conversion function. The phase change microcapsule with the photo-thermal conversion function comprises a silicon dioxide phase change microcapsule and graphene oxide packaged outside a silicon dioxide shell layer, and the phase change microcapsule with the photo-thermal conversion function is an irregular spherical body; the silicon dioxide phase change microcapsule has a core-shell structure, takes paraffin as a core and takes compact silicon dioxide as a shell. The microcapsule synthesized by the invention has good photo-thermal conversion capability and heat energy storage and release capability, can meet the application requirements of solar energy and heat energy conversion, and expands the energy source of the phase change microcapsule.

Compositions for preventing or limiting surface fouling as well as evaporation and methods for their use in air-matrix digital microfluidics (DMF) apparatuses are described. A mobilizing wax material may be used to selectively encapsulate a reaction droplet in the air gap of the apparatus, which permits the at least partially encapsulated reaction droplet to be portable within the DMF apparatus. Additional aqueous droplets may be combined with the encapsulated droplet, by merging with an aqueous droplet having a coating of a secondary material (e.g., an oil or other hydrophobic material) that may allow combining of the droplets. The compositions may be additionally useful in non-DMF applications such as laboratory protocols for hybridization, ligation and amplification.

The invention provides novel liquid-liquid phase separation microparticles (LLPS MPs) as well as a preparation method and application thereof. The liquid-liquid separation (LLPS) system is micron liquid drops formed by driving under the electrostatic attraction effect of positively charged polyelectrolyte and negatively charged inorganic salt or organic salt in an aqueous solution. Polyoxometallate (POM) is used to stabilize it by electrostatic attraction and precipitate LLPS MPs having a ridge structure. According to the preparation method, [{(B-alpha-PW9O34) Co3 (OH) (H2O) 2 (O3PC (O) (C3H6NH3) PO3)} 2Co] 14-(Co7-POM) with photocatalytic water oxidation activity is selected to deposit micron particles, so that the micron particles have enhanced photocatalytic water oxidation activity, and meanwhile, the micron particles can be recycled through simple and feasible solid-liquid separation.