85results about How to "Reduce interfacial tension" patented technology

The invention belongs to the technical field of talc, and provides a method for detecting fluorescent substances in talc raw ore, which comprises the following steps: S1, carrying out ball milling on the talc raw ore in a ball mill, sieving to obtain sieved powder, and adding deionized water into the sieved powder to obtain slurry; s2, adding the slurry into the mixture to enable the pH value of the slurry to be 5, stirring, and standing in a water bath for 2-3 hours to obtain a first precipitate; s3, adding a thiourea-ascorbic acid solution into the first precipitate to obtain a second precipitate; and S4, carrying out secondary ball milling on the second precipitate, and spreading the second precipitate in an enamel plate to detect whether the talc raw ore contains the fluorescent substances or not. The hydrochloric acid can dissolve quartz and mica to avoid generation of background fluorescence or quenching effect, and the nonionic surfactant polyethylene glycol can be adsorbed on the surface of the mineral to reduce interfacial tension, so that the hydrochloric acid is easier to infiltrate tiny pores, the pit defect caused by local over-corrosion is reduced, the pickling uniformity is improved, and the detection sensitivity is improved.

The application discloses a kind of biological nano preparations for heavy oil exploitation and preparation method thereof, it is related to oil exploitation technical field, and biological nano preparations for heavy oil exploitation is composed of the following mass percentage components: composite microbial fermentation liquor: 25~45%;Bio-surfactant: 6~12%;Nano metal oxide: 0.1~1.0%;Organic solvent: 10~20%;Slow-release carrier material: 2~8%;Stabilizer: 0.5~2%;The balance is water;Wherein, the composite microbial fermentation liquor is fermented by pseudomonas aeruginosa, bacillus subtilis and clostridium anaerobic bacillus under co-cultivation condition.The metabolic product of composite bacteria species used in the application contains a large amount of bio-surfactant, which can effectively reduce the oil-water interfacial tension to 10-3mN / m order of magnitude.Nano metal oxide produces local high temperature through quantum size effect, and promotes thick oil molecular chain to break.

The application discloses synthetic leather composite silica gel humanoid robot simulation skin and a preparation method and application thereof, and belongs to the humanoid robot surface material application field. The skin comprises, from outside to inside, a synthetic leather layer with bionic texture, a water-based polyurethane interface layer with a thickness of 0.03-0.06 mm, and a silica gel layer. The water-based polyurethane interface layer is composed of a water-based polyurethane-silicone block copolymer with a hydroxyethyl acrylate end cap and a side chain containing a vinyl group. In the preparation, the water-based polyurethane interface layer is first formed on the back of the synthetic leather, then a platinum gold catalyst is sprayed on the interface and a mold, and finally the addition type liquid silica gel containing a silicon hydrogen bond is compounded in the mold and is cured at 24-26 DEG C and 40%-60% humidity. Peeling damage is realized to occur in the silica gel body; meanwhile, the interface layer and the synthetic leather cooperatively constitute a double barrier, so that the silicon oil exosmosis is avoided. The product has strong comprehensive advantages, and the process is environment-friendly and low in cost.

This invention relates to an insulating oil and an oil-paper insulation system containing superhydrophobic nanoparticles, as well as their preparation method and application, belonging to the field of electrical equipment insulation technology. This invention provides an insulating oil containing superhydrophobic nanoparticles, wherein the superhydrophobic nanoparticles are silane-modified nanoparticles, and the nanoparticles include at least one of SiO2, TiO2, and h-BN; the insulating oil includes at least one of mineral insulating oil, synthetic insulating oil, and natural ester insulating oil. This invention achieves the superhydrophobicity of the nanoparticles and good compatibility with the oil phase through silane modification. Adding silane-modified nanoparticles to the insulating oil effectively reduces the water content of the insulating oil and optimizes the interfacial performance of the oil-paper. Combined with the low-temperature, high-efficiency, and uniform rapid impregnation process of this invention, the overall electrical performance and service life of the oil-paper insulation system are significantly improved.

The invention belongs to the technical field of algal polysaccharide extraction, and discloses a modification extraction method of algal asparagus polysaccharide and a method for preparing a lutein coating by using the algal asparagus polysaccharide. The modified extraction method comprises the following steps: extracting gracilaria lemaneiformis powder with a weak base solution, enabling lactide and polysaccharide to be subjected to grafting reaction through a redox initiation system under the assistance of ultrasonic waves, and then separating out a first polysaccharide component with high emulsibility and a second polysaccharide component with high gel property through graded alcohol precipitation. The two obtained functional components are used for coating xanthophyll, specifically, the first polysaccharide component emulsifies a xanthophyll oil phase to form a pre-emulsion, the second polysaccharide component is compounded with gelatin, a composite coacervate is formed on an oil drop interface by adjusting the pH value, and finally drying and curing are conducted. According to the method, two modified polysaccharides with definite functions can be synchronously obtained, the prepared xanthophyll coating is high in encapsulation efficiency, good in storage and processing stability and excellent in water dispersibility, and the problems that xanthophyll is unstable and difficult to apply are effectively solved.

The invention relates to the technical field of chemical material preparation, and particularly discloses a safe preparation method of a short fluorocarbon alkyl sulphobetaine surfactant, a product and application, and the safe preparation method comprises the following steps: (1) in a solvent system I, reacting epoxy chloropropane with secondary amine to obtain an intermediate 1; (2) in a solvent system II, reacting the intermediate 1 with sodium hydrosulfide or a hydrate thereof to obtain an intermediate 2; (3) reacting the intermediate 2 with short fluorocarbon alkyl iodide to obtain perfluoroalkyl thioether propyl tertiary amine; and (4) carrying out sulfonation treatment on perfluoroalkyl thioether propyl tertiary amine to obtain the short-fluorocarbon alkyl sulphobetaine surfactant. According to the invention, by designing a synthetic route without using a high-risk reagent, the safety and operability of the process are remarkably improved, and the sulphobetaine surfactant with excellent acid, alkali and salt chemical stability and excellent surface activity is successfully prepared; and a key material and a safe and reliable preparation process are provided for development of a new-generation efficient environment-friendly fire extinguishing agent.

The invention relates to a cleaning agent used after SiC substrate grinding and a preparation method thereof, and relates to the field of semiconductor cleaning agents, and the cleaning agent is prepared from the following raw materials by mass: 4-8% of an anionic surfactant, 2-6% of a nonionic surfactant, 2-6% of a cleaning auxiliary agent, 8-12% of sodium hydroxide, 2-4% of a bio-based modified antistatic agent, and the balance of water. The preparation method comprises the following steps: heating water, adding sodium hydroxide, stirring, adding the cleaning aid, stirring, adding the premixed anionic surfactant and nonionic surfactant, stirring, adding the bio-based modified antistatic agent, stirring, cooling, and filtering to obtain the cleaning agent for grinding the SiC substrate. The cleaning agent has a good cleaning effect, can effectively remove impurities after grinding, and meets the requirement of the semiconductor industry for high-quality cleaning of SiC wafers.

This application discloses a compatibilizer for polystyrene / polyolefin blends and its preparation method, belonging to the field of block copolymers. A block copolymer is disclosed, comprising polystyrene blocks and polyethylene blocks; the block copolymer is crystalline; the aggregated structure of the block copolymer consists of a polystyrene microphase region, a polyethylene crystalline region, and a branched amorphous region—three phases coexisting. This block copolymer exhibits extremely high compatibility with both polystyrene and polyolefin materials, effectively reducing interfacial tension between different materials, significantly improving the impact resistance, mechanical properties, and rheological behavior of polystyrene / polyolefin blends, without damaging other properties of the materials, and without side reactions such as crosslinking or degradation; this block copolymer exhibits plastic processing properties at high temperatures and elastomer properties at room temperature, classifying it as a thermoplastic elastomer; this block copolymer is also more flexible and has better transparency.

The application discloses an ultrafiltration membrane for sewage treatment and a preparation method thereof, and relates to the field of membrane separation technology. The method comprises the following steps: firstly, ZnO@PHEMA-Ag nanoparticles are prepared, and the nanoparticles are pretreated, modified, grafted and loaded with silver nanoclusters; then, maleic anhydride grafted PVDF and modified MXene are prepared; then, a composite casting solution is prepared, and the solution is cast into a film and then immersed into a polyvinyl alcohol coagulation bath containing dimethylformamide to form a film; finally, the finished ultrafiltration membrane is obtained through ultraviolet crosslinking post-processing. The ultrafiltration membrane has excellent anti-pollution performance through functional nanoparticles, substrate modification and process optimization.

This invention provides a method for preparing a high-salinity zinc oxide-resistant nanofluid mediated by Halomonas sp. and its application in enhancing oil recovery. Specifically, it includes: a Halomonas sp. strain CDH-2, with accession number CCTCC NO: M 2025786, which can rapidly grow in high-concentration salt solutions and produce salt-resistant extracellular metabolites. Fermenting and culturing CDH-2 under high-salt conditions yields a fermentation broth with a surface tension below 30 mN / m. Mixing and culturing the obtained fermentation broth with a metal precursor solution yields a high-salinity-resistant metal nanofluid. The resulting metal nanofluid maintains good stable dispersibility in high-salinity water and effectively reduces oil-water interfacial tension. It alters the wettability of oil-wetting surfaces, emulsifies and disperses crude oil, and reduces crude oil viscosity. Therefore, it can be used as an enhanced oil recovery agent in high-salt reservoirs and is widely applied in oilfield flooding, well huff and puff, and heavy oil viscosity reduction.

The invention discloses a water control type workover fluid and a preparation method thereof. The water control type workover fluid is prepared from the following components in parts by weight: 2 parts of a clay stabilizer, 0.2-1 part of a high-temperature chelating agent, 0.5-1 part of a corrosion inhibition bactericide, 1-2 parts of a waterproof locking agent, 5 parts of a phase change agent and 100 parts of filtered seawater. The method comprises the following steps: filtering the filtered seawater until suspended particles are less than 30 microns in standard value, sequentially adding a clay stabilizer, a high-temperature chelating agent, a corrosion inhibition bactericide, a water blocking prevention agent and a phase change agent, and uniformly stirring to obtain the water control type workover fluid. After the workover fluid enters a reservoir, the oil phase starting pressure can be reduced, the oil-water interfacial tension can be reduced, the effect of inhibiting water content rising after well workover is achieved, the workover fluid can be matched with different field operation types, and the recovery period of an oil well can be shortened.

The invention belongs to the field of oil and gas field development, and discloses nano water-based microspheres for profile control and flooding and a preparation method thereof.The preparation method comprises the steps that a deoxygenated saline water phase is continuously stirred in the protective atmosphere, 12-14 parts of a monomer phase and 13-16.5 parts of a dispersing agent are dropwise added into 70-75.5 parts of the saline water phase, and then 0.07-0.2 part of a water-soluble azo initiator is added; heating to the temperature of 55-65 DEG C, continuously stirring for 3-5 hours, heating to the temperature of 55-65 DEG C, and continuously stirring for 1-3 hours, so as to obtain the nano water-based microspheres for profile control and flooding; the preparation process of the salt water phase comprises the following steps: dissolving 24-31 parts of inorganic salt in 43-47 parts of deionized water, then adding 0.05-0.11 part of a metal ion complexing agent and 0.150-0.165 part of a chain transfer agent, and uniformly mixing; the preparation process of the monomer phase comprises the following steps: dissolving 7.0-8.5 parts of polymeric monomers in 4.5-5.5 parts of deionized water to prepare a solution, and adjusting the pH value to 5.0-6.5 by using a sodium hydroxide solution. The nano water-based microsphere for profile control and flooding is an emulsion which takes a water phase as a solvent and a water-soluble high-molecular polymer as a dispersing agent, so that pollution of an oil phase and an emulsifier is avoided, and the nano water-based microsphere for profile control and flooding is environment-friendly.

This invention relates to the field of health food technology, specifically to a method for preparing a tea oil-based paste and its beverage. This invention develops a tea oil-based paste that can be directly mixed with water. By compounding multiple components such as protein, polysaccharides, and curcumin, and using high-pressure homogenization technology to construct a stable tea oil dispersion system, it significantly improves the problems of oil separation and greasy taste in tea oil beverages. The unsaturated fatty acids and natural antioxidants abundant in tea oil in this invention optimize the nutritional structure of the beverage from both fatty acid composition and functional activity perspectives. After mixing the tea oil-based paste with water, a tea oil-based instant beverage with both nutritional value and good mixing properties can be obtained, aligning with the modern consumer market trend of healthier, more functional, and more convenient beverages.

This invention relates to the field of reinforcement materials technology, specifically to reactive low-temperature reinforcement materials for mining, their preparation methods, and applications. The reactive low-temperature reinforcement material for mining comprises component A and component B. Component A consists of polyester polyol, polyether polyol, silane coupling agent, and catalyst; component B consists of prepolymer and additives. The prepolymer is obtained by reacting polyether polyol b with polymethylene polyphenyl polyisocyanate. Polyether polyol b has a functionality of 3.1 and a hydroxyl value of 207 mg KOH / g, and is a polyether polyol polymerized with propylene oxide using maltitol, trimethylolpropane, hydroquinone, and triethylene glycol as initiators. The material prepared by this invention is primarily reactive in structure and flame-retardant, avoiding the impact of adding large amounts of additive flame retardants on material strength. The resulting material exhibits high compressive strength, low internal heat of reaction, and good flame-retardant properties.

The present application relates to oil and gas field development and environmental protection technical field, especially an aging oil demulsification treatment method, comprising: mixing fly ash and sodium hydroxide, then calcining, acid leaching, then mixing with oily sludge and ferroferric oxide, reduction reaction, mixing the reduction reaction product with 3-mercaptopropyl triethoxysilane, modification reaction, to obtain magnetic adsorbent; mixing aging oil, partial phosphate and water, stirring, standing and separating, to obtain pretreated aging oil; adding magnetic adsorbent, complexing agent, wetting reverse agent and demulsifier to the pretreated aging oil, stirring, then microwave irradiation treatment, magnetic separation, vortex separation and centrifugal dewatering, to obtain purified oil. The present application removes FeS particles by magnetic adsorbent, combines with multi-assistant component synergistic demulsification and multi-field coupling physical separation, destroys the stable emulsification system of aging oil, and the process is efficient, suitable for industrial demulsification treatment of high stability aging oil.

The invention relates to a low-temperature-resistant anti-skid adhesive material and a preparation method and application thereof, the anti-skid adhesive material comprises a modified HDPE base material layer and an acrylate pressure-sensitive adhesive layer coated on the base material layer, the base material layer comprises HDPE resin, POE elastomer, methyl vinyl silicone rubber, a compatilizer and a peroxide cross-linking agent; the adhesive layer comprises a soft monomer, a hard monomer, a macromonomer containing a polybutadiene chain segment, a functional monomer, a cold-resistant plasticizer, an initiator and a cross-linking agent. The anti-skid adhesive material provided by the invention can still keep high adhesion at a low temperature of-40 DEG C, and has good base material performance and excellent anti-skid performance.

The application provides a modified polypropylene material and a preparation method thereof, a modified polypropylene film and an oil-immersed capacitor. The preparation method of the modified polypropylene material comprises the following steps: mixing and soaking an antioxidant 1010 and natural ester insulating oil with a polypropylene material to obtain the modified polypropylene material; wherein the mass of the antioxidant 1010 is 0.1%-1% of the mass of the natural ester insulating oil. The modified polypropylene material prepared by the above method has at least the advantages of good compatibility with the natural ester insulating oil, high AC breakdown strength, high tensile strength and high elongation at break.

The invention discloses a composite extract for improving sleep and a preparation method thereof, and belongs to the technical field of plant extraction. According to the invention, four medicinal materials of spina date seed, lily, lotus seed and poria cocos which are homologous in medicine and food and have the effect of soothing the nerves are scientifically combined, and the composite extract for improving sleep is obtained by adopting a specific extraction process; according to the technology, active ingredients are efficiently released through the synergistic effect of cellulase, pectinase and acid protease, and the yield of gamma-aminobutyric acid and other sedative substances is remarkably increased through a co-fermentation system of lactobacillus plantarum and saccharomyces cerevisiae; lipid-soluble effective components are extracted by adopting glycyrrhizic acid and rhamnolipid assisted ultrasonic extraction technology, and finally, embedding protection of the active components is realized through a chitosan oligosaccharide-soybean lecithin system, so that thermal degradation and oxidation loss in the processing process are reduced, and compared with a traditional single extraction method, the preparation method has the advantages that the cost is reduced; according to the method, high-yield gamma-aminobutyric acid, jujuboside, triterpenic acid and other active ingredients can be obtained at the same time, and the effect of the composite extract is improved.

This invention relates to an insulating and microwave-absorbing liquid silicone material and its preparation method, belonging to the field of shielding materials technology. The liquid silicone material comprises: 38-45 wt% carbonyl iron powder, 5.5-7.2 wt% fluorinated modified silicone oil, 5-8 parts reactive diluent, 0.2-0.3 parts defoamer, and 0.1-0.15 parts leveling agent, with the balance being liquid silicone rubber base. The fluorinated modified silicone oil is prepared by a substitution reaction between tetraethylenepentamine and allyl chloride to obtain intermediate 1, followed by hydrosilylation with hydrogen-containing silicone oil to obtain intermediate 2, and finally by a substitution reaction with trifluoroiodopropane to introduce a fluorine structure. The polyamine in the molecule chelates with the carbonyl iron powder through a multidentate chelation effect, forming a dense organosilicon insulating layer on the iron powder surface, increasing the volume resistivity. Simultaneously, the fluorine structure reduces the surface energy of the filler, improves dispersibility and filling fluidity, and reduces the system viscosity. Furthermore, by optimizing impedance matching and enhancing interfacial polarization loss, the microwave absorption performance is significantly improved.

The invention belongs to the technical field of oil exploitation, and particularly relates to a dry powder thickening agent for fracturing as well as a preparation method and application thereof. The thickening agent comprises the following components: (a) 1-vinyl-2-pyrrolidone; (b) a di [2-(methacryloyloxy) ethyl] phosphate ester; (c) 2-(perfluorohexyl) ethyl methacrylate; (d) 4, 4 '-diaminostilbene-2, 2'-disulfonic acid; (e) an initiator; based on 1 mole part of 1-vinyl-2-pyrrolidone, the dosages of the di [2-(methacryloyloxy) ethyl] phosphate ester, the 2-(perfluorohexyl) ethyl methacrylate and the 4, 4 '-diaminostilbene-2, 2'-disulfonic acid are 0.05 to 0.1 mole part, 0.1 to 1 mole part and 0.2 to 0.5 mole part respectively, and the dosages of the di [2-(methacryloyloxy) ethyl] phosphate ester, the 2-(perfluorohexyl) ethyl methacrylate and the 4, 4 '-diaminostilbene-2, 2'-disulfonic acid are respectively 0.05 to 0.1 mole part, 0.1 to 1 mole part and 0.2 to 0.5 mole part. The thickening agent has the advantages of high apparent viscosity, high shear resistance, temperature resistance and high resistance reduction rate, and the resistance reduction rate reaches 70% or above.

This invention relates to the field of oilfield chemistry, and discloses a fracturing fluid drag-reducing agent composition, its preparation method, and its application. The drag-reducing agent composition comprises cis-15-tetracosenoic acid and a polymer; the polymer comprises polymer A and polymer B, polymer A comprising structural unit A from formula (1), and polymer B comprising structural unit B from formula (2); formula (1); formula (2); wherein R1 is substituted or unsubstituted C 12 -C 20 R1 is an alkyl group; R2 is an unsubstituted C1-C4 alkyl group; X is selected from positive integers from 6 to 14; R3 is H or a C1-C3 alkyl group. The drag-reducing agent composition can maintain drag-reducing performance and improve oil recovery over a wide temperature range.

The invention relates to the technical field of ceramic glazes, and discloses a high-strength wear-resistant ceramic glaze and a preparation method thereof, 3-chloro-2-chloromethyl propylene and diethyl iminodiacetate are subjected to nucleophilic substitution, the obtained product is hydrolyzed under an acidic condition, and 2-(N, N '-dimethylene carboxyl) aminomethyl-allyl diacetic acid is obtained. And carrying out addition reaction on the poly (ethylene glycol) methacrylate and sodium vinyl sulfonate to obtain the dispersing agent. The preparation method comprises the following steps: adding a dispersing agent into a preparation process of a zirconium silicate precursor, drying to obtain dispersing agent modified zirconium silicate superfine powder, mixing with potassium feldspar, albite, high-purity quartz, calcined kaolin, aluminum oxide, calcium carbonate and zinc oxide, carrying out ball milling, and sieving to remove iron, so as to prepare the high-strength wear-resistant ceramic glaze, so that the wear resistance, high strength and corrosion resistance of the ceramic glaze are improved, and the service life of the ceramic glaze is prolonged. Therefore, the wear resistance, high strength and corrosion resistance of the ceramic product are improved.

The application discloses a preparation method of a high-performance coal water slurry additive. Tannic acid, crotonic acid and allyloxy polyoxyethylene ether are used as raw materials, a tannic acid-based ternary polymer is obtained through oxidation reaction and free radical polymerization reaction, and then the tannic acid-based ternary polymer is compounded with methylene dianaphthalene sulfonic acid sodium to obtain the high-performance coal water slurry additive. The high-performance additive prepared by the application has a smaller adding amount in a slurry preparation process, and the prepared slurry has better performance. In addition, the additive overcomes the poor matching problem of traditional additives, has good universality, and has good slurry preparation effect in a traditional slurry preparation system, a high-concentration coal water slurry preparation system and a slurry preparation system mixed with organic waste, and especially solves the slurry preparation problems in the high-concentration slurry preparation system and the slurry preparation system mixed with organic waste.

The invention discloses an electrolyte, a battery and a preparation method thereof, and relates to the technical field of batteries, the electrolyte comprises a basic solvent, an electrolyte salt, vinylene carbonate and an amphiphilic molecular additive; the structural formula of the amphiphilic molecular additive is R1-(CH2) n-R2. By adding the amphiphilic molecular additive into the electrolyte, the interfacial tension between the electrolyte and an electrode is remarkably reduced, the structural formula of the additive is R1-(CH2) n-R2, R1 is alkyl or aryl, the additive is endowed with hydrophobicity, and stable dispersion of the additive in the electrolyte is facilitated; r2 is carboxylate or sulfonate, hydrophilicity is provided, interaction between the electrolyte and the electrode is enhanced, due to the design, the electrolyte can permeate into a micropore structure of the electrode more easily, the solid-liquid interfacial tension is remarkably reduced, the contact angle of the electrolyte to the electrode is gradually reduced along with increase of the proportion of the additive, and the solid-liquid interfacial tension is remarkably reduced. Therefore, the wettability of the electrolyte on the electrode is obviously improved.

This invention relates to the field of oilfield chemical technology, and discloses a gemini surfactant, its preparation method, and its application. The gemini surfactant comprises the structure shown in Formula I, where R is a C1-C8 alkyl group or a C6-C8 aryl group; Y... ‑ SO3 ‑ M + The ions are alkali metal ions or alkaline earth metal ions; m = 1-30; n = 1-15. The gemini surfactant of this invention can be used as a viscosity reducer for heavy oil, exhibiting strong viscosity-reducing ability. Through the effective increase of the strength of the oil-water interface film via polyoxyethylene and polyoxypropylene segments, it has a good emulsifying effect, which is beneficial for the migration of oil-water emulsions in rock pores, expanding the swept area, significantly reducing residual oil saturation, and resulting in good oil displacement effect.

The invention belongs to the technical field of food science and colloidal chemistry, and relates to zein-OSA starch-sodium caseinate ternary composite Pickering particles as well as a preparation method and application of an emulsion of the zein-OSA starch-sodium caseinate ternary composite Pickering particles. The ternary composite particle is formed by self-assembly of zein, OSA starch and sodium caseinate, and has a high zeta potential absolute value and optimal interface adsorption performance. When the particles are used for stabilizing an oil-water emulsion, the interfacial tension can be remarkably reduced, the droplet distribution is improved, and the storage stability is enhanced. The prepared emulsion is suitable for a food emulsification system and a bioactive substance delivery system, and has the advantages of being natural, safe, high in stability and good in industrialization prospect.

This invention relates to the field of oilfield development technology, specifically to a high-temperature resistant oil displacement foaming agent, its preparation method, and its application. The method involves first preparing a main agent solution containing a high-temperature resistant additive and a main agent, then adding a foam stabilizer for compounding, and finally maturing to obtain the high-temperature resistant oil displacement foaming agent. The main agent includes alkyl aryl sulfonate derivatives, the high-temperature resistant additive is an acrylamide derivative, a styrene derivative, or an organophosphonate, and the foam stabilizer is modified guar gum. The compounding temperature is 120-150℃, the reaction pressure is 0.3-0.5 MPa, and the time is 4-6 hours. This method achieves synergistic effects among the main foaming agent, modified guar gum, and organophosphonate, forming a stable system. This high-temperature resistant oil displacement foaming agent possesses excellent thermal stability and interfacial activity; it exhibits both excellent high-temperature and salt resistance and efficient foaming, foam stabilizing, and oil displacement effects under ultra-high temperature, ultra-high salinity, and high calcium and magnesium ion environments.

The present application belongs to the technical field of oil and gas exploitation, and relates to a nano desorption agent for gas well and a preparation method thereof. The desorption agent uses special pretreated biochar as a core carrier, loads specific proportion of bimetallic oxide nanoparticles, and is supplemented with an environmentally friendly surfactant for surface modification. Through the synergistic effect of nano size effect, catalysis / electron transfer effect of metal oxide, physical adsorption and pore transport effect of biochar, and interfacial tension reduction effect of surfactant, the adsorption energy barrier of gas molecules such as methane on the rock surface is significantly reduced, and the efficient desorption is promoted. At the same time, all components and preparation processes are environmentally friendly and harmless to human body.

The invention discloses an imrecoxib solid preparation and a preparation method thereof, and belongs to the technical field of pharmaceutical preparations, the solid preparation comprises the following components by mass: 15-25% of imrecoxib, 10-40% of pea maltodextrin, 10-40% of Soluplus, 1-3% of poloxamer, 10-30% of a filler, 10-20% of a disintegrating agent, 0.8-1.2% of a flow aid and 0.8-1.2% of a lubricant. Through synergistic interaction of triple carriers, Soluplus inhibits drug crystallization by means of hydrogen bonds and promotes dispersion; the poloxamer reduces the surface tension and improves the dispersity and the dissolution rate; the pea maltodextrin plays an anti-oxidation role, improves the sphericity, fluidity and stability of the particles, and is low in cost. Aiming at the difficulties that imrecoxib is low in solubility, easy to oxidize and the like, medicine dissolution is remarkably improved, related substances are more stable, and both process robustness and cost control are considered.

The application discloses a kind of bio-based modified calcium carbonate powder preparation's reinforced toughening polylactic acid composite material and preparation method thereof, using bio-based aliphatic diacid to modify calcium carbonate powder, then bio-based epoxy compound is grafted on the surface of the carboxylated calcium carbonate powder, and bio-based modified calcium carbonate crosslinking agent is prepared.Subsequently, carboxylated calcium carbonate powder and bio-based modified calcium carbonate crosslinking agent are added to polylactic acid and middle, and high-strength high-toughness degradable polylactic acid composite material is prepared by blending melt extrusion.The prepared polylactic acid composite material system component is simple, effectively reduces compatibility conflict, realizes high-strength high-toughness and rapid degradation simultaneously, greatly reduces production cost, and can be applied to agricultural film, food, packaging and medical field.