869results about How to "Liquid" patented technology

This invention provides a high heat transfer performance liquid nano-metal. It relates to cooling fluid working medium, and especially it can be used under high rush density condition which need high intensity cooling fluid working medium for heat exchanging and cooling, such as computer array and reactor. The solvent of this invention is liquid metal, and the soluble of this invention is nanometer particle. This invention solve the problem of high price of present metal liquid cooling working medium and the limited performance of common metal liquid, leaking out easily taken place using common liquid and easy forming sediment of present nanometer cooling agent.

The invention discloses a photocuring and thermocuring conductive adhesive, which is prepared by mixing photosensitive high polymer, diluent monomer, conducting particles, photoinitiator, polymerization inhibitor, epoxy resin, epoxy active diluting agent, latent curing agent and latent promoting agent, grinding the mixture, and stirring and dispersing in a planetary manner. The curing temperature of the product is low, and deep curing can be realized; after being cured, the adhesive has high adhesiveness and high solvent resistance; and the adhering strength is high, the resistivity is low, and the requirements of microelectronic packaging technique for LED chips, liquid crystal materials, glass substrates, thin film circuits, PCB circuit boards and the like can be met.

An ultrasonic control shear thickening and polishing method comprises the following steps of 1 adding a non-Newtonian fluid polishing solution mixed with abrasive particles and having the shear thickening effect into a polishing pond and fixing a workpiece on a clamp, wherein the clamp is located above the polishing pond; 2 starting a polishing solution circulating system to enable the non-Newtonian fluid polishing solution to be circularly pumped out of the bottom of the polishing solution and fed into the upper portion of the polishing pond; 3 starting an ultrasonic wave generating device, and meanwhile setting the vibration frequency and vibration amplitude to enable the non-Newtonian fluid polishing solution in the polishing pond to rapidly vibrate and produce a strong shear thickening phenomenon; 4 adjusting the clamp to enable the workpiece to perform relative motion, wherein the abrasive particles having the polishing effect produce the micro-cutting effect or chemical mechanical effect on the workpiece to remove materials on the workpiece surface, and accordingly the workpiece surface polishing is achieved. The invention further provides an ultrasonic control shear thickening and polishing device. The ultrasonic control shear thickening and polishing method and device is high in polishing efficiency and low in cost.

The invention provides a conductive fabric and a preparation method thereof. The conductive fabric comprises, from inside to outside, an adhesive force improving layer attached to the surface layer ofa fabric substrate, a liquid metal layer, an oxygen isolation protective layer and a packaging protective layer. The preparation method comprises: applying the adhesive force improving layer to the surface layer of a fabric substrate, coating the adhesive force improving layer with the liquid metal layer, coating the liquid metal layer with the oxygen isolation protective layer, and coating the oxygen isolation protective layer with the packaging protective layer. The coating manner includes spraying, brush coating, flow coating or printing. Compared with a conductive fabric in the prior art,the conductive fabric is excellent in conductivity, fold resistance, laundering durability and tensile property. The preparation method is simple and reliable.

The invention discloses a preparing method of porous alumina ceramic through sol-gel freezing drying technique, which comprises the following steps: adopting aluminium isopropoxide as former; hydrolyzing under high temperature to obtain alumina sol; controlling the solid content of sol; adding moulding agent; blending evenly; casting; moulding; removing air to form vacuum; freezing at low temperature; drying and moulding the frozen sample; detackifying moulded sample under low temperature; placing in the high-temperature furnace; sintering; obtaining the porous alumina ceramic with bending-proof strength reaching 65Mpa and bulk density at 0.14-2.4g / cm3. The adjustable aperture is 1-100um, which can be filter, catalyst carrier and heat insulating material.

The invention relates to an oxidation resistant coating for aluminum electrolytic carbon anode and a coating method thereof. The method is characterized in that the surface of the aluminum electrolytic carbon anode is provided with an anti-oxidation coating formed by dried and mixed coat which is sprayed on the surface of the electrode, wherein the mixed coat comprises the following compositions in weight percentage: 1 to 25 percent of bisphenol A-type waterborne epoxy resin, 0.1 to 16 percent of boron carbide, 2 to 13 percent of boric acid and / or boric oxide, 15 to 50 percent of alumina, 0 to 20 percent of pseudo-boehmite, 10 to 30 percent of alumina sol, 0.1 to 0.3 percent of foam suppressor, and the balance being water. The coating and the method adopt an alumina-based gradient boron carbide oxidation resistant coating with a multilayer structure, and effectively blocks the contact of air and CO2 with carbon anode carbon, thereby avoiding or reducing excessive consumption of the carbon anode carbon. The method can realize carbon conservation by aluminum electrolytic prebaked anode by 10 to 20 kilogram / ton-Al.

The invention relates to a preparation method of a microencapsulated gradient halogen-free flame retardant system. The preparation method comprises the steps of: mixing a phosphorus-series flame retardant with an inorganic flame retardant according to a certain ratio to obtain a microencapsulated halogen-free flame retardant, then carrying out surface modification on a charring agent, and then mixing the microencapsulated halogen-free flame retardant, a phosphorus-containing organic flame retardant and surface-modified charring agent according to a certain ratio to obtain the microencapsulated gradient halogen-free flame retardant system. By using the system, distributed gradient flame retarding is realized, the flame retardancy of a polymer material is greatly improved, the defect that compatibility between the flame retardant and the polymer is poor is solved, the migration of the halogen-free flame retardant from the polymer matrix under high-temperature and moisture conditions is significantly reduced, and the long-term storage of a flame-retardant polymer material is facilitated. The method has the characteristics of simple process, convenience for operation, environmental friendliness, and lower cost. The obtained flame retardant system has good flame retarding effect and wide application field.

The invention discloses an all-fiber magnetic field sensor. The sensor is composed of a broadband light source, a sensing head and a spectrometer, wherein two ends of one section of a photonic crystal fiber with magnetic fluid poured in are welded with a single-mode fiber to form the sensing head, one end is melted eccentrically, a Mach-Zehnder interferometer with single fiber embedded is formed, changes of phase differences among different modes are caused through changes of the reflection rate of the magnetic fluid in the photonic crystal fiber, spectral shift is thus caused, the shift amount of a wave crest / a wave trough is detected to demodulate magnetic field information, and measurement on the magnetic field is realized. The all-fiber magnetic field sensor is compact in structure, small in size, simple in manufacturing, stable and reliable in operation, high in sensitivity and low in cost.

The invention discloses a collector for floating ilmenite and a preparation method thereof. The collector is mainly prepared from the following components by mass percent: 40-60% of peroxide fatty acid soup, 5-15% of emulsifiers, 10-30% of oil substance and the balance of water. The preparation method comprises the following steps: mixing the components uniformly according to the mass percent ratio, throwing the mixture into a reaction kettle and stirring the mixture for 0.5-1 hour, thus obtaining the collector. The collector has the advantages of small amount, low cost, strong collecting capability, safety, nontoxicity, capability of reducing the amount of media such as modifiers.

The invention relates to a solid acid catalyst, preparation thereof and application thereof in esterification reaction. The solid acid catalyst is prepared from heteropoly acid and organic phosphine. The preparation method comprises two steps: firstly, the organic phosphine and alkyl sultone are reacted in organic solvent to generate internal phosphonium salt containing alkyl sulfonic acid lateral chains; and then the internal phosphonium salt and the heteropoly acid are mixed into a solution respectively, two solutions are mixed under stirring in chemometry mixture ratio to generate organic heteropolyacid, solvent is removed by evaporation under reduced pressure, and the organic heteropolyacid is washed and dried. The catalyst has the characteristics of high activity and selectivity, and reusability for multiple times, and is suitable for various esterification reactions taking carboxylic acid and alcohol as raw materials.

The heat abstractor comprises a main radiator, an auxiliary radiator, a connecting pipe and a minipump. The main radiator possesses flow passages, where molten metal with low melting point or alloy flow working medium are contained. Cooling fins are setup at surface of the main radiator contacted to surface of the chip to be cooled. Cooling fins are also setup at surface of the auxiliary radiator possessing flow passages, where liquid metal with low melting point or alloying flow working medium are contained. The connecting pipe connects between the main and auxiliary radiators. The minipump is installed on the connecting pipe for driving liquid metal and working medium. The said working medium is metal gallium or its alloy, which are meltable near room temperature. The invention integrates fin cooling and convective cooling, providing advantages of small size, large cooling area, high heat transfer efficiency, close cyclic process without influence on environment.

The invention discloses an injectable hollow hydroxyapatite microsphere / chitosan composite drug carrier material. The material comprises the following components in percentage by weight: 0.5-2wt% of hollow hydroxyapatite, 2wt% of chitosan, 5.6wt% of beta-sodium glycerophosphate and 90.4-91.9 wt% of water. The preparation method comprises the following steps: first, loading drug in the hollow sodium hydroxyapatite microsphere; then, preparing chitosan thermo-sensitive hydrogel; finally, mixing the drug-loaded hollow hydroxyapatite microsphere and the chitosan thermo-sensitive hydrogel in a solid-liquid ratio of (0.05-0.2)g / 10ml, and stirring to obtain the injectable hollow hydroxyapatite microsphere / chitosan composite drug carrier material. The material can realize slow and controlled release of drug, gives the material injectable molding property, and realizse minimally invasive therapy to bone defect or fracture.

The invention uses liquefying enzyme ejecting method to produce low DE value malt dextrin, the invention refers to a kind of enzyme project manufacturing method of low DE value malt dextrin and the application. The invention uses core starch or indica rice powder as materials, uses the special device steam ejecting liquefying device and laminar current device, the product whose DE value is 2-6 is obtained through ejecting, thermal retardation and liquefying, enzyme eliminating process. The product with 5-6 DE value can be used in solid chrysanthemum flower essence beverage to replace 66% sugar powder and decrease 60% chrysanthemum extracting solution; the product with 2-3 DE value can be used in the production of gammon and icecream, the 50% aft in gammon and icecream can be replaced by malt dextrin, 30 g fat in gammon can be replaced with 6-7.5 g malt dextrin, 4 g fat in icecream can be replaced with 1 g malt dextrin. The invention fills the blank of low DE value malt dextrin in our country.

The invention discloses a hydraulic structure, which comprises a soil foundation and a water body impermeable and ventilated structure supported by the soil foundation, wherein the water body impermeable and ventilated structure comprises a waterproof ventilated particle layer which is positioned on the soil foundation and has the waterproof ventilated particle diameter of 20 to 3,500 microns, the compactedness of over 90 percent and the thickness of at least 1cm. The impermeable and ventilated structure of the hydraulic structure prevents water leakage depending on the principle of enhancingthe surface tension of the water so as to fulfill the aim of impermeability, and simultaneously reduces the surface tension of gas so as to make the gas easily pass through the waterproof ventilated particle layer. Therefore, the impermeable and ventilated structure has dual functions of impermeability and ventilation. Because the waterproof ventilated particle layer consists of impermeable particles, the hydraulic structure has liquidity, can automatically repair the soil foundation or cracks caused by crustal movement, can be communicated with atmosphere and can effectively improve the ecological environment of the water body.

The invention relates to a method for preparing a polysaccharide biogum polymer gel profile control agent. The method includes the steps that polysaccharide biogum is dissolved in distilled water for allocating a solution, a monomer and a cross-linking agent are added into the solution, nitrogen is led in, the air is isolated, then an initiating agent is added, and the profile control agent is obtained through thermostatic reaction. The method for preparing the polysaccharide biogum polymer gel profile control agent has the advantages that the cost of raw materials is low, and the raw materials are wide and capable of being obtained easily; various properties such as gelling time, gelling strength, the mobility after gelling, temperature resistance and salt resistance of the profile control system can be controlled by changing the concentration of the polysaccharide biogum, the monomer, the cross-linking agent and the initiating agent in the reaction system or by changing the type and the initiating system of the cross-linking agent; certain mobility is achieved, the profile control agent can be injected under the shaft easily, and a high permeability layer in the stratum can be effectively plugged; the strength is good, and the method is suitable for oil deposit with the formation temperature being below 150 DEG C; the method is suitable for high-salt oil deposit.

The invention relates to a pole ear, its manufacturing method and the lithium ion battery including the pole ear. Among them, the said pole ear includes the pole ear slide, in which the pole ear also includes the hot melt adhesive membrane, and the hot melt adhesive membrane directly hot pressing the outer surface of the pole ear slide. Among them, the said battery pole ear manufacturing method includes the following steps: according to the pole ear slide size, intercepting the hot melt adhesive membrane size; using two hot melt adhesive membranes clamping the pole ear slide; using heating module to heat up-and-down the hot melt adhesive membrane clamping the pole ear slide; cooling the pole ear slide after hot pressing. This invention provides the pole ear, and since the hot melt adhesive membrane can be firmly attached the pole ear slide together, and two hot melt adhesive membranes integrate together after hot melt, and form to a sealing plastic slide after cooling, it ensures the insulation of the pole ear slide, effectively avoid the original short circuit caused by the adhesive plaster's broken or fallen, and then cause the battery fever, swell, or even explosion, so it greatly enhanced the safety performance of the lithium ion battery.

The invention discloses a cross-linked polypropylene composite material. The cross-linked polypropylene composite material is prepared by mixing polypropylene, an initiator, a cross-linking agent, a self-cross-linking promoter, a catalyst, a primary antioxidant, an auxiliary antioxidant and other processing aids according to a certain proportion. A preparation method of the cross-linked polypropylene composite material comprises the following steps of: weighing other components except the self-cross-linking promoter and the cross-linking catalyst according to the proportion first, fully mixing in a mixing kettle, and then adding into a twin-screw extruder from a feeding port; and adding the self-cross-linking promoter and the cross-linking catalyst into the twin-screw extruder from a side port of a screw, and then extruding and pelleting to obtain the cross-linked polypropylene composite material, wherein the adding of the self-cross-linking promoter from the side port of the screw is delayed, so that silane is grafted on polypropylene first and then reacts with the self-cross-linking promoter to form preliminary cross-linked polypropylene. The invention has the advantages of overcoming a warm water or steam cross-linking process in the conventional silane cross-linked polypropylene, realizing one-step continuous production, meeting the requirement of injection molding, and solving the problem that the subsequent processing cannot be performed by a radiation cross-linking method, along with excellent mechanical property.

The invention discloses an active adaption flexible mechanical gripper with variable rigidity. The active adaption flexible mechanical gripper with variable rigidity comprises a gripper base, a plurality of gripper fingers capable of being controlled to bend, and a gripping bag used for adaptively attaching and tightly clamping the surface of an object to be gripped; the interior of the gripping bag is filled with particulate matters; a first air port, used for controlling the vacuum degree inside the gripping bag and further controlling overall shaping of the particulate matters, and adaptively clamping the object to be gripped, is formed in the gripping bag; the gripper fingers are fixed on the gripper base; the gripping bag is positioned inside a space formed by the gripper fingers, andthe outer wall of the gripping bag is fixedly attached with the bent inner side walls of the gripper fingers; the active adaptation flexible mechanical gripper can carry out self active adjustment, can improve the adaptation and the flexibility of an actuator at the tail end of a robot to a great extent, can greatly improve gripping performance, is high in gripping load and excellent in stability, and has a wide application scope.

The invention relates to a method for preparing an environmental-friendly type gel profile control agent. The method comprises the following steps: completely dissolving a monomer A, a cross-linking agent and a monomer B by using distilled water, adding an initiator, and performing polymerization reaction at 20-80 DEG C in the atmosphere of sealing nitrogen so as to form prepolymer; subsequently completely dissolving polyving alcohol by using distilled water, adding an obtained polyving alcohol solution, the cross-linking agent and the initiator into the prepolymer, and continuously reacting at 50-80 DEG C in the atmosphere of sealing nitrogen till the reaction is completed, thereby obtaining the environmental-friendly type gel profile control agent. The environmental-friendly type gel profile control agent has the advantages that firstly, the raw materials are low in cost and easy to obtain, the production cost can be greatly lowered, and the environment is not polluted; secondly, the viscosity of the system and the property of the formed gel can be controlled; thirdly, the agent can be easily filled into a well, a high permeation layer in stratum can be effectively blocked, and thus a purpose of water shut-off and profile control is achieved; and fourthly, the agent is relatively good in stability.

Provided is an improved preparation method for electronic cigarette smoke solution. The method comprises charging and perfuming procedures. A charging procedure is aimed at high boiling point edible and tobacco flavor or edible and tobacco flavor containing waxiness, the edible and tobacco flavor is mixed with propylene glycol or propylene glycol / glycerin, and then molecular distillation is performed to obtain an electronic smoke solution base stock. The perfuming procedure is aimed at essential oil kind and low boiling point chemical synthesis perfumes and edible and tobacco flavors blended by the two kinds of perfumes. Through adding perfumes and natural nicotine in the base stock, an electronic cigarette smoke solution product is obtained. In the method, charging and perfuming are processed respectively, high boiling point and waxy components in the perfumes are removed, and defects that high boiling point perfumes easily generate charring smell, and electronic cigarette smoke solution is clear and bright and fragrance transmission property is better. Perfuming is performed in a final step, preventing loss of low boiling point essences, and kinds and contents of essences can be adjusted according to characteristics of the electronic cigarette base stock. The method gives rich note on the electronic cigarette smoke solution.

The invention relates to a perovskite solar cell and a preparation method thereof. By arranging a liquid crystal layer on the surface of an electron transmission layer or a hole transmission layer, the thin film morphology of the electron transmission layer or the hole transmission layer is improved, the defect on the surface of the electron transmission layer or the hole transmission layer is passivated, the transmission of reverse current carriers is effectively blocked, the electric leakage generation is prevented, the combination probability of electrons and holes which are generated in a perovskite light absorption layer is reduced, and the photoelectric conversion efficiency and the stability of the cell are improved; and meanwhile, the liquid crystal layer is prepared by a low-temperature solution method, and the preparation method is suitably used for roll-to-roll industrial production of the perovskite photovoltaic cell, and is simple in process and low in fabrication cost.

The invention discloses a slow / controlled-release compound fertilizer suitable for field crops, which belongs to a mixed fertilizer capable of controlling the release rate of nutrient components. A preparation method for the compound fertilizer is characterized by comprising two key processes of melting granulation and tumbling coating, namely preparing internal slow-release compound fertilizer granules by melting granulation and then obtaining the slow / controlled-release compound fertilizer by irregular granule speed change and tumbling coating. The slow / controlled-release compound fertilizer comprises the following raw materials in percentage by weight: 35 to 65 percent of urea, 9 to 36 percent of monoammonium phosphate or triple superphosphate, 8 to 40 percent of potassium chloride or potassium sulfate, 1 to 38 percent of granulation accessories, 3 to 5 percent of nano chitosan modified attapulgite and 1 to 2 percent of nano chitosan coating agent. The slow / controlled-release compound fertilizer suitable to be applied to the field crops can control the release rate of the fertilizer effect according to the requirements of different stages of crop growth for nutrients, duly and properly provides the nutrients for the growth of the crops, has high utilization rate, facilitates the degrading of a coating material, and is favorable for environmental protection.

The invention relates to a hot-melt pressure sensitive adhesive, and concretely relates to a hot-melt pressure sensitive adhesive for adhesive tapes, and a preparation method thereof. The hot-melt pressure sensitive adhesive comprises a styrenic thermoplastic elastomer SIS, a styrenic thermoplastic elastomer SBS, petroleum resin, rosin glyceride, a primary antioxidant, an auxiliary antioxidant anda softener, wherein the styrenic thermoplastic elastomer SIS is a linear structure, the styrene content is 20-28%, and the diblock content is 20-28%; and the styrenic thermoplastic elastomer SBS is astar structure, the styrene content is 28-32%, and the diblock content is 12-18%. The purpose of the invention is to solve the problem of poor use performance of the adhesive tapes, caused by failedcombination of the initial adhesion, the permanent adhesion and the aging resistance of existing hot-melt pressure sensitive adhesives for adhesive tapes. The initial adhesion (the initial adhesion includes ring initial adhesion and 180 DEG peel strength) of the hot-melt pressure sensitive adhesive of the invention meets use requirements, and has a high adhesion and a good aging resistance. The present invention also provides the preparation method of the hot-melt pressure sensitive adhesive for adhesive tapes.

The invention discloses a test platform of a rock-fill dam mask impervious structure model on a deep overburden layer. The platform is formed by a model box, a counter force frame, a loading system, a water pressure simulation device, a flexural deformation simulation device and a test system. The model box is arranged in the counter force frame. The flexural deformation simulation device is located at the bottom of the model box so as to simulate an impervious structure bottom deflection displacement boundary condition. The loading system applies vertically downward pressure through the counter force frame and transmits a flexible pressure load to the top surface of an impervious structure model. A testing system is formed by an earth pressure sensor, a strain, a displacement meter and a data collection instrument which are arranged in the structure model and a high-definition digital camera at a side of the model box together carries out real-time monitoring on the structural state. The platform can be used for the model test research of force deformation characteristics and failure mechanism of a deep overburden layer rock-fill dam mask impervious structure in the condition of surface water pressure load and large bottom deflection.

The embodiment of the invention discloses a display panel and a display device. The display panel comprises a display area, a non-display area and a polaroid. The non-display area comprises a fan-out area and a binding area which are arranged in the direction away from the display area; the fan-out area comprises a first part and a second part; the second part is a bending area; the first part, the second part and the binding area are arranged along a first direction; a plurality of first openings are formed in one side, facing the fan-out area, of the polaroid; the bending area and the binding area are covered with protective glue, and the protective glue further extends to the edge of the polaroid in the first part. According to the technical scheme provided by the embodiment of the invention, the risk of wire breakage can be reduced while a narrow frame is realized.

The present invention belongs to the field of polymer material and biological material technology, and is especially one porous rack with spherical pores and its molding preparation process. The 3D porous rack is prepared with polymer material as base material and through molding at normal temperature. The simple process may be used in preparing both rack with simple and regular outer appearance and rack with complicated and irregular outer appearance. The prepared porous rack may be relatively thick and has regular spherical pore structure of porosity over 90%, and the pores are communicated mutually and homogeneously distributed. The rack has high mechanical strength, and is suitable as 3D porous cell rack in tissue engineering and in other application fields.

The invention relates to a preparation method of solid low-sugar ginger tea. Full gingers are pressed to obtain partial juice, left gingers are quickly dried through microwaves, edible alcohol is used for soaking the dried left gingers so as to extract ginger oil resin, the ginger juice and the ginger oil resin are mixed to prepare microcapsule powder, and then the microcapsule powder is mixed with crystallized sugar alcohol to prepare the solid low-sugar instant ginger tea. According to the preparation method, ingredients of raw gingers can be maximally utilized and protected, the productionefficiency also can be improved, and the production cost can be reduced; the produced solid low-sugar instant ginger tea belongs to categories of low-sugar food and low-calorie food; the procedures are coherent and simple, technique conditions are moderate, the ginger juice is completely used, and the edible alcohol for extracting the ginger oil resin can be condensed and recycled; and the solid low-sugar instant ginger tea powder has characteristics of fineness, mobility, particular fragrance of the ginger, slight spice irritation, instant solubility, capability of being rapidly dissolved inhot water, stability in a drying state, and more than or equal to 90 percent of gingerol retention after being held in darkness for 6 months.

The invention discloses a preparation method of black iron oxide particles with corrosion inhibition performance. The method comprises the following steps of: dissolving urotropin, ethyl hydroxy ethylcellulose and lauryl sodium sulfate in deionized water according to the definite weight ratio, thereby obtaining a viscous liquid; putting black iron oxide into a granulating machine for granulating while evenly spraying the viscous liquid onto the black iron oxide powder at the same time, thereby forming small black iron oxide particles; and drying and screening the small black iron oxide particles, thereby obtaining a finished product. According to the method, the black iron oxide is modified by the urotropin and other components, so that the corrosion inhibition performance of the black iron oxide is enhanced; and the liquidity and the dispersibility of a black iron oxide pigment are realized. The produced black iron oxide has the characteristics of being excellent in temperature resistance, good in acid and alkali resistance, strong in light absorption, high in tinting strength, good in compatibility and dispersibility and the like, thereby being wide in market prospect.

The invention belongs to the field of fertilizer, and particularly relates to slow release fertilizer comprising fly ash gel and a preparation method of the slow release fertilizer. The slow release fertilizer comprising fly ash gel is characterized in that fly ash which is solid waste of a fuel factory is taken as the raw material, modified through ion beam irradiation, and excited by an active exciting agent to form a gel solution with a three-dimensional network structure; and in a gel forming process, the surface energy of the fly ash is increased, the adsorbability is enhanced, a large amount of chemical fertilizer can be adsorbed after the fly ash is mixed with a chemical fertilizer solution, the chemical fertilizer is fixed in the network structure of the gel after adsorption, so that the release and decomposition speed of the chemical fertilizer is effectively slowed, and the slow release purpose is achieved. The slow release fertilizer can be dispersed in an aqueous solution to form the gel and can be used for irrigation and fertilization with water, water and fertilizer integration is facilitated, the raw material source is wide, the production technology is simple, and the slow release fertilizer has positive significance on increase of crop yield.

The present invention provides an instant water-in-oil resistance-reducing agent and a preparation method thereof. The resistance-reducing agent is synthesized by inverse emulsion polymerization. In particular, the preparation method comprises the steps of dissolving a water-soluble monomer into an aqueous phase; dispersing the monomer into a nonpolar liquid to form a water-in-oil emulsion by an emulsifier while stirring, wherein an initiator performs initiation to carry out a polymerization reaction; basic composition of an aqueous phase is acrylamide, methacrylate and 2-acrylamide-2-methylpropanesulfonic acid; and basic composition of an oil phase is white oil and a mixed surfactant. The water-in-oil resistance-reducing agent synthesized by the preparation method is an ivory emulsion liquid which is a high molecular polymer; the agent has good stability and a certain degree of fluidity, and can be directly used and rapidly dissolved in water. By using the resistance-reducing agent to prepare a slippery water fracturing fluid, the agent has the characteristics of small dosage, high temperature resistance, salt resistance and shearing resistance; the agent is suitable for an online continuous mixing technological process; the resistance-reducing rate can reach 69.6%; and damage to a reservoir is very low.