83 results about "Double emulsion" patented technology

The invention discloses a dual-mode micro-droplet generation micro-fluidic chip and application thereof in generation of dual-emulsion droplets, and relates to the technical field of micro-fluidic chips. The method comprises the following steps: respectively injecting two different internal phase solutions from the left ends of respective iron tubes, guiding the internal phase solutions to a wedge-shaped tube orifice of a theta-shaped glass capillary tube through respective thin tubes, injecting an intermediate phase solution into a square glass tube through an intermediate phase inlet by using a No.1 needle, and injecting an external phase solution into the square glass tube through an external phase inlet by using a No.2 needle; the two internal phase solutions, the intermediate phase solution and the external phase solution converge at an inlet of the circular glass capillary tube, and after entering the circular glass capillary tube, water-in-oil-in-water double-emulsion droplets are obtained. The invention can obtain the dual-mode micro-droplet generation micro-fluidic chip and the application of the dual-mode micro-droplet generation micro-fluidic chip in generation of dual-emulsion droplets.

The invention provides tranexamic acid-glutathione-containing compound emulsifiable paste and a preparation method thereof.W1 / O / W double emulsion phase structural design is adopted, reduced glutathione is encapsulated in an acidic inner water core, an oil phase is stabilized through hydrogenated lecithin and sorbitan sesquioleate, an outer water phase contains tranexamic acid, a layered gel network is constructed, and the tranexamic acid-glutathione-containing compound emulsifiable paste is prepared. A submicron dispersion system with the particle size D50 of 0.30-0.80 microns, the polydispersity index of 0.15-0.25 and the viscosity of 2.0-8.0 Pa seconds is realized, the encapsulation efficiency of glutathione is not lower than 70%, the oxygen content of a head space is not higher than 1.0%, and the encapsulation efficiency of glutathione is not lower than 70%. The three technical contradictions of coupling conflict between a high-yield viscoelastic structure and low-shear damage kernel integrity, coexistence of fresh and cool low-viscosity skin feeling and high-barrier anti-oxidation and anti-leakage and opposite low-surface-activity sensitive skin compatibility and submicron low-PDI dispersion stability are solved; the traditional Chinese medicine composition has wide application values of improving skin color unevenness, fading color spots, brightening skin color, soothing and repairing.

The invention discloses multi-response microgel with an ultrathin shell layer and a preparation method of the multi-response microgel, and relates to the technical field of gel. The preparation method comprises the following steps: preparing an inner oil phase, a middle water phase and an outer oil phase; respectively injecting the inner oil phase, the intermediate water phase and the outer oil phase into a microfluidic device to obtain O / G / O type double emulsion microgel; and carrying out a cross-linking reaction on the double emulsion and a cross-linking agent, thereby obtaining the product. According to the preparation method disclosed by the invention, the O / G / O type double-emulsion microgel with a core-shell structure is successfully prepared by taking corn oil, gelatin and sodium alginate as main raw materials by adopting a micro-fluidic technology, so that the embedding rate of a target object can be improved, and active adsorption and embedding of active substances are realized; the emulsion microgel is further subjected to cross-linking modification, through cross-linking modification, the stability and strength of the O / G / O type double emulsion microgel structure after swelling adsorption are improved, the shell layer of the microgel is converted into a nano-scale thin film from a micron-scale thin film, and the multi-response microgel with an ultrathin shell layer is formed.

The application discloses an incubation method of self-assembled organic material crystals based on double emulsion drops, and the method comprises the following steps: preparing W / O / W type double emulsion drops with uniform size through a microfluidic chip; during the preparation of the double emulsion drops, using a self-assembled organic material solution as an inner water phase solution, using a non-water-soluble solution as an intermediate oil phase solution, and using a water phase solution containing a high salt concentration as an outer water phase solution to encapsulate the self-assembled organic material solution, so as to avoid the self-assembled organic material from being free in the outer water phase solution; and incubating the double emulsion drops loaded with the self-assembled organic material solution. By using the concentration difference between the outer water phase solution and the inner water phase solution, under the influence of osmotic pressure, water molecules in the inner water phase solution migrate to the outer water phase, and the concentration of the self-assembled organic material in the double emulsion drops also increases, so as to promote the growth of the self-assembled organic material crystals, and finally, the self-assembled organic material crystals with uniform size are obtained in the double emulsion drops, and each double emulsion drop contains a single self-assembled organic material crystal.

This invention discloses a method for preparing hydrophilic drug nanoliposomes based on microfluidic-low-shear coupling double emulsion and the hydrophilic drug nanoliposomes prepared according to the following method: (1) Prepare aqueous solutions of hydrophilic drugs and chloroform solutions of soybean lecithin respectively; (2) Add the chloroform solution of soybean lecithin to the chamber as the oil phase, and inject the aqueous solution of hydrophilic drugs into the oil phase in the low-shear stirring field through a microtube under low-speed stirring and shearing, and collect the W / O pre-emulsion sample; (3) Use the W / O pre-emulsion sample as the dispersed phase, and inject it into the external aqueous phase in the same way as in step (2), and emulsify it under low-speed stirring and shearing to form a W / O / W double emulsion; (4) Remove the chloroform by vacuum evaporation of the W / O / W double emulsion to obtain hydrophilic drug nanoliposomes. The prepared Ganoderma lucidum polysaccharide nanoliposomes have a particle size controlled at 200-300 nm, a polydispersity index of about 0.2, and an encapsulation efficiency of more than 70%, which is more than twice that of the traditional thin film hydration method. It solves the technical problem of low encapsulation efficiency of water-soluble macromolecular Ganoderma lucidum polysaccharides.

The application belongs to the field of food functional factor processing, and particularly relates to a water-in-oil-in-water composite emulsion embedding lactoferrin, a preparation method and application. The W1 / O / W2 double emulsion system is constructed by a two-step method, and the leakage and inactivation risks of lactoferrin and VD3 in the preparation, storage and processing processes are effectively reduced through the double barrier effect of the oil phase film and the outer water phase film. Under the optimized sodium caseinate and gellan gum compounding conditions, the encapsulation rate of lactoferrin can be up to 82.52%, which proves that the structure has obvious advantages in improving the loading efficiency of active substances, and can significantly improve the encapsulation rate and structural stability of lactoferrin. The water-in-oil-in-water composite emulsion system prepared by the application can significantly improve the retention rate of lactoferrin in the digestion process, enhance the tolerance of lactoferrin to the gastrointestinal environment, and then enhance the arrival rate of lactoferrin in the intestinal tract, thereby improving the overall bioavailability.

The invention discloses a preparation method and application of PLGA (poly (lactic-co-glycolic acid))-curcumin nanoparticles. The invention relates to the technical field of biomedicine, and the preparation method comprises the following steps: taking a polyvinyl alcohol (PVA) aqueous solution as a water phase and a dichloromethane solution of polylactic acid-glycolic acid copolymer (PLGA) and curcumin (Cur) as an oil phase, preparing curcumin-entrapped PLGA nanoparticles (PLGA at Cur NPs) by adopting a water-in-oil-in-water double emulsion method, and the prepared PLGA nanoparticles are spherical, uniform in particle size and uniform in particle size. The carrier PLGA has good biocompatibility and biodegradability and is non-toxic and non-irritant, and a surfactant does not need to be added in the preparation process of the nanoparticles, so that the toxicity is further reduced.

The preparation method of the antimony trioxide with the porous structure comprises the following steps: adding an antimony trioxide matrix into a montmorillonite loading agent which is 5-8 times of the total amount of the antimony trioxide matrix, stirring, carrying out suction filtration, and drying to obtain the antimony trioxide with the porous structure. An antimony trioxide matrix is constructed by adopting a double emulsion template method, meanwhile, montmorillonite is pretreated, interlayer water is damaged by preheating at 210-230 DEG C, then the temperature is increased to 350 DEG C, heat preservation is performed for 1 h, an interlayer structure is stripped through thermal expansion, the specific surface area is increased, more active sites are exposed, and the specific surface area is increased. And dopamine / carbon nanotube composite modification: dopamine hydrochloride is subjected to self-polymerization under a weakly alkaline condition to form a polydopamine (PDA) coating layer.

This invention belongs to the field of fire extinguishing materials and their preparation technology, and provides a fire extinguishing microcapsule and its microfluidic controllable preparation method. The preparation method is characterized by the following steps: (1) preparing fluids of each phase, (2) preparing a dual emulsion using a microfluidic device, (3) collecting and sealing the dual emulsion in a collection container, controlling the axis of the collection container to be horizontal, and controlling the collection container to rotate around its axis for 1 to 15 minutes, applying light to solidify the outer shell of the dual emulsion droplets while maintaining the rotation of the collection container, cleaning, and drying to obtain the final product. The fire extinguishing microcapsule prepared by this method consists of an outer shell and a liquid fluorine-containing fire extinguishing agent encapsulated within the outer shell. The outer shell of the fire extinguishing microcapsule has a uniform thickness, and the eccentricity between the outer shell and the core is less than 0.1. The method of this invention can achieve precise customization of fire extinguishing microcapsules according to the differentiated fire characteristics of different application scenarios, and can improve the concentricity between the core and the outer shell of existing fire extinguishing microcapsules.

The application relates to the embedding technical field, and particularly discloses a double emulsion gel bead embedding beta-carotene and probiotics and a preparation method thereof. The double emulsion gel bead comprises a composite layer, an oil phase and an inner water phase from outside to inside. The composite layer comprises an outer water phase and calcium alginate which are fused with each other. The outer water phase comprises a product after carrageenan and sodium caseinate are subjected to a Maillard reaction. The oil phase comprises beta-carotene, vegetable oil and a food emulsifier. The inner water phase comprises probiotics. In the gel bead, the beta-carotene and the probiotics are simultaneously embedded in the double emulsion gel bead, the calcium alginate hydrogel shell starts to decompose when entering the intestinal tract, then the double-layer emulsion is slowly decomposed after being subjected to chemical digestion of pancreatic juice, bile and small intestinal juice and mechanical digestion of the small intestine in the small intestine, and the beta-carotene and the probiotics are gradually released, the beta-carotene is converted into vitamin A in the intestinal tract and is absorbed, and the probiotics are delivered to the colon to play a probiotic effect.

Systems and methods for measuring osmotic pressure are described. In many embodiments, double emulsion droplets can be used as osmotic pressure sensors to measure local osmotic pressure. The double emulsion droplets can measure osmotic pressure in living cells and / or tissues.

The invention belongs to the technical field of food processing, and particularly relates to ultrasonic phosphoric acid acetylated mung bean protein as well as a preparation method and application thereof. According to the ultrasonic phosphoric acid acetylated mung bean protein preparation method provided by the invention, the mung bean protein is prepared by utilizing the combined action of three methods of ultrasonic assistance, phosphorylation modification and acetylation modification; the emulsifying activity of the prepared ultrasonic phosphoric acid acetylated mung bean protein reaches 149 mL / g and the emulsifying stability reaches 75%; the double emulsion system prepared on the basis of the ultrasonic phosphate acetylated protein shows the following outstanding properties: the average particle size of liquid drops is as low as 0.6 mu m, the entrapment efficiency is as high as 71%, the liquid drop distribution uniformity is remarkably improved, and meanwhile, the physical stability of the emulsion is effectively enhanced due to the moderate increase of the viscosity of the system.

The application discloses a preparation method and application of allulose-vanillin microcapsules, and comprises a double emulsion preparation step, an alternating current field treatment step and a spray drying step. By constructing a double water-in-oil-in-water emulsion, the problems of low solubility and poor stability of the material are solved, and the bioavailability of allulose and vanillin is improved. The allulose-vanillin microcapsules are prepared by using alternating current field superimposed spray drying, the adsorption and combination of allulose and vanillin molecules on the water-oil phase are strengthened, and the encapsulation rate and the retention rate of vanillin are effectively improved. The preparation method provided by the application aims to reduce the sucrose content in food by using cross-modal interaction, realizes the goal of reducing sugar without reducing sweetness of food, solves the problems of insufficient sweetening effect and limited microcapsule embedding efficiency of flavor substances in the prior art, and has a wide market application prospect in the field of food processing.

Methods and systems for automated double emulsion droplet library generators are described herein. Optimizing the geometry and composition of double emulsion droplets is essential for maximizing their utility in various scientific and industrial applications. The microfluidic method is effective to generate a droplet library, which is useful to optimize droplets. However, monitoring and intervention by a human are necessary to generate droplet library. The disclosure provided herein presents an automated double-droplet library generator that utilizes a fine-tuned object detector and feedback control. The system autonomously produces libraries of single-core double emulsion droplets tailored to user-defined sizes, shell thicknesses, and solute concentrations.

A probiotic microsphere with in-situ proliferation, its preparation method and application. The microsphere is prepared by a two-step Pickering double emulsion method, encapsulating probiotics and panax notoginseng saponins, and then mixed with sodium alginate and cross-linked by calcium ions. The structure significantly improves the survival rate of probiotics in simulated gastric juice, intestinal juice, heat treatment and antibiotic environment, and maintains high viable cell count during long-term storage. Co-encapsulated PNS and double emulsion stabilizer natural polysaccharide-protein nanocomposite can promote the proliferation of probiotics in-situ, increase their activity. In addition, the microsphere can effectively promote the colonization and proliferation of probiotics in the intestinal tract, enhance the oral bioavailability of bioactive ingredients, and is suitable for functional food, feed, biological medicine field, especially as 3D printing special medical food for dysphagia population and prevention and treatment of intestinal inflammatory diseases.

The invention provides low-fat high-nutrition sesame milk and a preparation method thereof. The preparation method comprises the following steps: S1, preparing low-fat sesame meal and degreased sesame essential oil; s2, mixing the low-fat sesame meal with pure water, and grinding to obtain sesame primary pulp; adding tannase and phytase for enzymolysis to obtain enzymolysis sesame protein pulp, adding compound soybean protein, adjusting the solid content of a system, and homogenizing to form a uniform basic emulsion; s3, slowly injecting the core water phase into the intermediate oil phase, and shearing and emulsifying to form a W / O primary emulsion; slowly adding the W / O primary emulsion into the hydrogel outer layer, and refrigerating for 1-2 hours to form double emulsion gel microspheres; and S4, mixing the double emulsion gel microspheres with the basic emulsion, stirring for 10-15 minutes, sequentially adding a flavoring agent and a stabilizing agent, homogenizing, sterilizing at low temperature for 30 minutes, and quickly cooling to obtain the low-fat high-nutrition sesame milk. The problem that fat in the sesame milk is too high is solved, meanwhile, the natural flavor is reserved, and the prepared product has the advantages of being low in fat, high in nutrition and good in taste.

The invention relates to the technical field of epoxy resin materials, and discloses a nano rubber epoxy resin flexibilizer double-emulsion stirring preparation method, which comprises: mixing an epoxy resin matrix, a liquid rubber component, a surfactant and a diluent to form a primary double-emulsion; the method comprises the following steps: acquiring a viscosity induction torque representing dispersion phase droplet breaking resistance in a stirring process, monitoring a torque change rate to judge a dispersion equilibrium state, triggering a rotating speed step factor to increase a stirring rotating speed according to the torque change rate, and realizing forced regulation and control on dispersion phase particle size distribution by increasing shear stress; overlapping an oscillation shear field and cooperating with reverse stirring to induce an interface anchoring component to be spread and implanted at a phase interface to construct a chemical anchoring layer. According to the method, viscosity drift caused by temperature rise is compensated through torque feedback, the shear energy level is maintained to be constant, and the consistency of nanophase particle size distribution is ensured; a chemical anchoring structure is formed by utilizing an oscillation shearing induced phase interface, an infiltration dead zone is eliminated, the two-phase bonding strength is enhanced, and the service reliability of the material is improved.

The application belongs to the technical field of petroleum fracturing proppant preparation, and particularly relates to a preparation method of an in-situ self-grown core-shell structure double-repellent micro-nano proppant double-emulsion fracturing fluid. The application uses sodium silicate, a silane coupling agent and ethyl lactate as proppant core material precursor materials, uses a thermosetting resin as a proppant shell layer precursor material, and uses double-repellent modification materials and a drag-reducing agent as precursor materials of the double-repellent surface, so that the cost is reduced, and the strength of the proppant and the flow permeation and drag reduction capacity thereof are improved.

The application provides a method for preparing hollow non-spherical micro-nanoparticles based on a coaxial micro-reactor, and belongs to the field of droplet microfluidics and polymer materials. A three-channel coaxial micro-reactor is designed to generate a water-in-oil-in-water (W / O / W) double emulsion. The innermost phase is an alkaline electrolyte aqueous solution, the intermediate oil phase is a polymer solution, and the outermost phase is a surfactant aqueous solution. With the volatilization of the intermediate phase solvent, the double emulsion droplets form hollow non-spherical micro-nanoparticles. The double emulsion is placed in a collection liquid with different electrolyte concentrations, water molecules in the collection liquid penetrate into the innermost phase under the action of osmotic pressure, increase the size of the inner droplets of the double emulsion, and then change the morphology of the outer droplets, so that the non-spherical structure required is presented, and the size of the hollow micro-nanoparticles is controllable. The coaxial micro-channel reactor used in the application adopts a flow focusing structure, which is used for controllable generation of double emulsion to prepare multi-chamber hollow non-spherical micro-nanoparticles.

The invention belongs to the technical field of daily chemical products, and particularly relates to a scalp oil control composition containing tea polyphenol as well as a preparation method and application of the scalp oil control composition. The composition comprises the following components in percentage by mass: 10%-50% of vegetable fat, 0.01%-15% of a water-in-oil emulsifier, 0.01%-15% of an oil-in-water emulsifier, 0.001%-5% of tea polyphenol modified nanoparticles and the balance of water. According to the invention, the water-in-oil emulsion is used as a basic form, and the tea polyphenol modified nanoparticles are used as an internal phase, so that the stability of tea polyphenol is effectively improved; meanwhile, an oil-in-water emulsifier is added for modification, so that the emulsion forms a water-in-oil-in-water (W / O / W) dual-emulsification structure, and the problem of poor solubility of the water-in-oil emulsion is solved. In addition, through the synergistic effect of all the components, the scalp oil-control shampoo can effectively adjust scalp water-oil balance, and an excellent scalp oil-control effect is achieved; meanwhile, a good moisturizing effect is achieved, and the dual advantages of oil control and mild nursing are achieved.

The invention discloses a preparation method of taurine-enhanced beef soup with taurine embedded by double emulsions. The preparation method comprises the following steps: step (1), extracting and enriching taurine in bovine by-products; step (2), preparing double emulsions embedded with the taurine extract; (3) adding double emulsions into the beef soup, and sterilizing; and (4) measuring the sense organ and the taurine storage amount after sterilization. The obtained ready-to-eat beef soup product contains taurine which is several times higher than that of common beef soup, the ready-to-eat beef soup is taurine-enhanced beef soup, and the double-emulsion embedding technology can remarkably mask flavor damage caused by addition of high-concentration taurine to the beef soup; meanwhile, the loss of taurine caused by high-temperature sterilization can be obviously reduced. The taurine is extracted from bovine by-products, and compounds used for preparing the double emulsion are all food-grade natural sources and are safe and harmless.

The present invention provides micro- to milli-meter sized polymer encapsulated inorganic salt PCM and PCM gel composite spheres for high thermal energy storage, minimal subcooling, high thermal stability, no phase segregation, and high thermal conductivity using double emulsion synthesis techniques. The encapsulated PCM invention addressed the common issues encountered such as subcooling, leakage, instability, and poor thermal energy density. An innovation of the present art is in the constituents which make up the invention being low cost, safe and environmentally friendly. Inclusion of graphene oxide in the encapsulated PCM invention results in enhanced thermal conductivity and up to 33% subcooling reduction. Applications of the invention are in the building envelope, integrating with cooling / heating equipment (HVAC, refrigeration, water cooling) and building materials (insulation, ceiling, roof, flooring, drywall, paint), the aerospace and textile industry, and the transport and storage of biological materials, organs, medicines, chemicals, food and drink, and other temperature-sensitive materials.

The invention provides a surface modification method and system for a double-emulsion-drop micro-fluidic chip, and relates to the technical field of micro-fluidic chips, the method comprises the following steps: carrying out plasma treatment on a substrate and a substrate with a micro-channel, carrying out hydrophilic modification on the surface of the micro-channel, and packaging; a hydrophobic reagent is conveyed to a to-be-hydrophobic area in the microchannel for local hydrophobic modification in a positive pressure driving mode by adopting a pumping device; after local hydrophobic modification, a cleaning reagent is introduced into the micro-channel, the residual hydrophobic reagent is washed, gas is introduced for blow-drying, and the double-emulsion-droplet micro-fluidic chip subjected to local hydrophilic and hydrophobic treatment is obtained. Compared with the prior art, the scheme does not need additional complex instruments and tedious steps, only needs several minutes from treatment to double-emulsion droplet generation, is adaptive to micro-fluidic chips with different flow channel sizes, shapes and focusing angles, can enable an inner phase solution, an intermediate phase solution and an outer phase solution to stably occupy corresponding channels, and remarkably improves the stability and duration of double-emulsion droplet generation.

The application discloses a preparation method of temperature-sensitive chitosan-based microcapsules based on double emulsion-single coagulation and application thereof, and the preparation comprises the following steps: reacting vanillin, isocyanate ethyl acrylate and dibutyl tin dilaurate to obtain vanillin modified isocyanate ethyl acrylate, uniformly mixing the vanillin modified isocyanate ethyl acryate with diacetone acrylamide and potassium persulfate, and then heating and reacting to obtain a temperature-sensitive crosslinking agent oligomer; emulsifying water / oil emulsion, chitosan and oil / water emulsifier, and then dropping the temperature-sensitive crosslinking agent oligomer to obtain the temperature-sensitive chitosan-based microcapsules. The temperature-sensitive chitosan microcapsules prepared by the application are green, low-carbon, environment-friendly and biodegradable, can coat water-soluble active substances and oil-soluble active substances at the same time, and have temperature-sensitive controllable release performance; the microcapsules can be coated on the surface of fabrics to obtain fabric coatings. The temperature-sensitive chitosan microcapsules can be applied to the fields of medical protective articles, home textile fabrics, sportswear, curtains, leather products and paper.

The application provides a tranexamic acid-glutathione compound cream and a preparation method thereof, adopts a W1 / O / W double emulsion phase structure design, encapsulates reduced glutathione in an acidic inner water core, stabilizes an oil phase by using hydrogenated lecithin and sorbitan sesquioleate, and constructs a lamellar gel network in an outer water phase containing tranexamic acid, so as to realize a sub-micron dispersion system with a particle size D50 of 0.30-0.80 microns, a polydispersity index of 0.15-0.25 and a viscosity of 2.0-8.0 Pa seconds, the encapsulation rate of glutathione is not less than 70%, and the headspace oxygen content is not higher than 1.0%, three technical contradictions of a high yield viscoelastic structure and a low shear damage inner core integrity coupling conflict, a smooth low skin feeling and a high barrier anti-oxidation and anti-leakage coexistence problem and a low surface activity sensitive skin compatibility and a sub-micron low PDI dispersion stability are solved, and the application has wide application values of improving uneven skin color, lightening color spots, brightening skin color and soothing and repairing.

The invention discloses a preparation method of hyaluronic acid microspheres with high uniformity and high cross-linking density, W / O / W type double-emulsion droplets with uniform size are prepared through a micro-fluidic chip, in the preparation process of the double-emulsion droplets, a mixed solution of modified hyaluronic acid and a photoinitiator is used as an inner water phase solution, an oil phase solution is a water-insoluble solution, and the inner water phase solution and the oil phase solution are used as an outer water phase solution. A solution containing a higher salt concentration is used as an external aqueous phase solution. The internal water phase is subjected to lossless concentration by utilizing the osmotic pressure of the internal and external phases, water molecules in the internal water phase solution migrate to the external water phase under the influence of the osmotic pressure, and the concentration of the methacrylated hyaluronic acid in the double-emulsion droplets is gradually increased, so that the concentration of the hyaluronic acid microspheres can be increased to 8.4 wt% or above; the problem that in the prior art, a high-concentration hyaluronic acid microsphere solution cannot be directly used for preparing the microspheres through a microfluidic technology is solved, and the crosslinking density of the hyaluronic acid microspheres can be further improved and the size and the crosslinking density can be accurately controlled due to the improvement of the concentration.

The invention provides an amphiphilic adsorbent for reducing the cholesterol content of beef tallow as well as a preparation method and application of the amphiphilic adsorbent. The adsorbent adopts a core-shell structure microsphere design, a core layer of the adsorbent is food-grade diatomite modified by a silane coupling agent, and a shell layer of the adsorbent is a cyclodextrin-pectin composite system. The composite shell layer is composed of an amphiphilic cyclodextrin mixture and an amphiphilic network, wherein the amphiphilic cyclodextrin mixture is composed of hydroxypropyl-beta-cyclodextrin and octyl-beta-cyclodextrin, and the amphiphilic network is formed by cross-linking oleic acid grafted low-methoxyl pectin and inulin through calcium ions. The preparation method comprises the key steps of diatomite modification, shell gel solution preparation, core-shell structure self-assembly and the like. By regulating and controlling the mass ratio of the components and the reaction conditions, the amphiphilic microspheres with both hydrophilic and hydrophobic areas are successfully constructed. The adsorbent can specifically target and efficiently remove cholesterol in beef tallow.

The application discloses a kind of temperature-resistant salt-tolerant slow swelling microspheres based on double emulsion and preparation method and application, it is related to oilfield chemical technical field, preparation method includes the following steps: emulsifier is weighed and dissolved in deionized water, ultrasonic dispersion is uniformly, then acrylamide, sulfonic monomer, hydrophobic monomer, polyoxyethylene ether functional monomer, di-vinyl benzene and initiator are added into the dispersion solution of emulsifier respectively, and water phase is prepared by stirring, water phase is slowly added into inner oil phase, and oil-in-water primary emulsion is obtained by high-speed stirring, then oil-in-water primary emulsion is added into outer oil phase and stirred to obtain double emulsion.Double emulsion is deoxidized by nitrogen, and the product is collected after aging at room temperature after stirring polymerization, washed, air-dried to constant weight, and temperature-resistant salt-tolerant slow swelling microspheres are obtained;In the application, the temperature-resistant salt-tolerant slow swelling microspheres prepared based on double emulsion template have spatial isolation effect of annular liquid film, the amphiphilic environment of emulsion provides multiphase reaction space for the synthesis of microspheres, and the microspheres have uniform particle size and excellent dispersity.

The invention belongs to the technical field of high polymer material processing and functionalization application, and particularly relates to an anti-skid mute material for shoe soles and a preparation method of the anti-skid mute material. The invention aims to solve the problem of conflict among the skid resistance, high resilience, softness and silence characteristics of the current sole skid-resistant and silence material. Monodisperse W / O / W double emulsion droplets are prepared and cured to form silicon rubber hollow microspheres with uniform wall thickness, and a polycaprolactone polymer brush layer is grafted on the surface of the microspheres in situ through a ring-opening polymerization method; the preparation method comprises the following steps: preheating high-damping thermoplastic polyurethane particles, sequentially adding the layered double-metal hydroxide nanosheets and the modified microspheres, mixing at low temperature, adding the polyethylene fibers and the auxiliary agent, and carrying out melt blending to obtain the material, and the material has the characteristics of high wetland friction coefficient, excellent rebound rate, low ground contact noise and the like.

The invention discloses a preparation method of a multifunctional concrete admixture. The preparation method of the concrete multifunctional admixture comprises the following steps: firstly, mixing an oil phase system A formed by PVC and an organic solvent, Span-80, ettringite and calcium carbonate to obtain a solution B, and then emulsifying the solution B with a sodium thiosulfate solution to obtain an emulsion D; secondly, dropwise adding the emulsion D into a PVA emulsion, stirring to form a double emulsion E, stirring, centrifuging, washing, precipitating and drying to obtain microspheres F; and finally, mixing the microspheres F with a sodium sulfate solution, PVA and nano ferroferric oxide to obtain a turbid liquid I, mixing PVC with a plasticizer, a solvent and Span-80 to obtain an oil phase system G, dropwise adding an emulsion J emulsified by I and G into a PVA emulsion, and carrying out after-treatment to obtain the multifunctional concrete admixture. The admixture prepared by the method disclosed by the invention is a microsphere-in-microsphere structure body, so that the integration of concrete early strength and crack repair functions is realized, and the problem of concrete shrinkage cracks caused by early strength can be quickly solved.