544results about How to "Increase viscosity" patented technology

The invention relates to a ring structure betaine and double-tailed hydrophobic association polymer fracturing thickening agent and a preparation method thereof. The thickening agent is formed by copolymerization of four monomers, namely acrylamide, 2-allyl methylamino sodium ethanesulfonate, methyl diallyl sulfoethyl betaine and hydrophobic monomer double-tailed long-chain alkyl methyl allyl ammonium chloride. The preparation method comprises the following steps: firstly adding distilled water, then sequentially adding acrylamide, 2-allyl methylamino sodium ethanesulfonate, methyl diallyl sulfoethyl betaine and a hydrophobic monomer double-tailed long-chain alkyl methyl allyl ammonium chloride, adjusting the total concentration, introducing N2 to remove oxygen, adding an initiator, and reacting to prepare an AM / AMES / MDASBA / DCnMAAC quadripolymer, namely the polymer fracturing thickening agent. The thickening agent provided by the invention has good water solubility, and shows good salt resistance in mixed brine with the mineralization degree of greater than or equal to 30000 mg / L. The prepared linear solution and gel formed after crosslinking have high viscosity retention capacity at the temperature of 150 DEG C and the shearing rate of 170 s <-1 >, and the actual construction requirement for fracturing yield increase with the on-site mineralization degree larger than or equal to 30000 mg / L is met.

The invention provides a swing vibrator type piezoelectric micropump and a driving and manufacturing method thereof. The piezoelectric micropump comprises a supporting structure, a first through-flow layer, a second through-flow layer and an actuator, wherein the first through-flow layer and the second through-flow layer are arranged at the two ends of the supporting structure, and the actuator is arranged in the supporting structure. The actuator comprises two actuating units which are arranged in parallel. The actuation unit includes a substrate and a vibration element. The vibration element is fixed on the substrate; the two actuating units are of the parallel and opposite cantilever structures on the opposite sides, center stress similar to that of a conventional annular actuator structure cannot be generated in the swing gas pumping process of the two actuating units, and the service life of the piezoelectric micropump can be prolonged. Meanwhile, when different excitation signals are input into the two actuating units, the two actuating units can generate asynchronous vibration, so that reverse airflow with certain continuity is generated in the piezoelectric micropump, the effect of regularly self-cleaning the air inlet is achieved, and long-time continuous work of the piezoelectric micropump in a complex environment is achieved.

The invention discloses an amphiphilic carbon dot, a clean fracturing fluid and application of the clean fracturing fluid. The amphiphilic carbon dot is prepared by performing solvothermal reaction on organic acid and a hydrophobic aliphatic compound. According to the amphiphilic carbon dots provided by the invention, simple preparation of the amphiphilic carbon dots with different structures and properties can be realized by changing the types of the hydrophobic aliphatic compounds, and the clean fracturing fluid prepared by utilizing the amphiphilic carbon dots not only has high temperature resistance and is suitable for reservoirs with relatively high temperature, but also has high salt resistance, so that the clean fracturing fluid can be used for preparing the clean fracturing fluid. And the fracturing fluid has a good fracturing effect in hydrofracture operation of low-permeability and high-salinity oil reservoirs.

The invention relates to the technical field of microorganisms, in particular to a lactobacillus kefir-producing subsp. Kefir W182 and application thereof. The preservation number of the lactobacillus kefir-producing subspecies is CGMCC No.27058, the preservation time is April 11, 2023, and the lactobacillus kefir-producing subspecies can survive for a long time in intestinal tracts, has a strong adhesion characteristic, can produce exopolysaccharides at high yield, can be used for fermenting dairy products, fruit juice, fruit puree, soybean milk and the like, and can also be used for preparing leavening agents and natural thickening agents. Especially when applied to fermented milk products, the fermented milk products can have rich flavor and very good viscosity without adding any existing thickening agent and emulsifying agent, can remarkably reduce separation of whey, can be stored for a long time, and have wide application in the field of food.

The invention relates to a slag performance regulation and control method for large-proportion collaborative smelting of multi-source lead-based solid waste in flash lead smelting, belongs to the technical field of non-ferrous metal smelting, and mainly solves the problem of collaborative regulation and control of the viscosity performance of slag by factors such as ZnO content, Al2O3 content, CaO / SiO2 mass ratio, alkalinity and the like of FeOx-CaO-SiO2-ZnO-PbO-Al2O3 system slag so as to realize low-carbon and safe smooth smelting. The method comprises the following steps: (1) reasonably controlling the contents of elements such as Zn and Al in a mixed material fed into a furnace and the addition amount of a CaO flux and a SiO2 flux, and starting smelting; (2) in the flash smelting process, the content of ZnO in the slag is controlled to be lower than 25 wt%, the content of Al2O3 in the slag is controlled to be lower than 6 wt%, the mass ratio interval of CaO / SiO2 is 0.30-0.50, the alkalinity interval is 1.8-2.3, and flash smelting and slag-lead separation are completed; and (3) normally discharging slag and lead. According to the method, in the production practice of flash lead smelting, the problem that slag and lead are difficult to separate due to collaborative smelting of large-proportion and multiple types of high-zinc and high-aluminum solid wastes can be solved, the safe, energy-saving and efficient lead smelting process is guaranteed, and the production capacity of the flash lead smelting furnace for treating the multi-source lead-based solid wastes is improved.

The invention relates to the technical field of chemical reaction equipment, in particular to a reaction device for synthesizing high-molecular N-halamine resin, which comprises a viscosity adjusting mechanism, the viscosity adjusting mechanism comprises a detection plate for detecting viscosity, a first permanent magnet is embedded in the detection plate, a second permanent magnet is magnetically adsorbed by the first permanent magnet, and a second permanent magnet is embedded in the second permanent magnet; the top end of the second permanent magnet is provided with a magnetism isolating plate, and the top end of the magnetism isolating plate is fixedly connected with a conducting strip. The viscosity of the resin is fed back by detecting the movement distance of the detection plate, when the viscosity of the resin is increased, the friction force between the resin and the detection plate is also increased, the detection plate moves towards the side away from the connecting spring, and the movement drives the second permanent magnet and the conducting strip to slide on the resistance plate. And through a current monitor in the PLC, the current change of the slide rheostat can be detected, so that the viscosity of the resin is monitored in real time.

The invention relates to a betaine type double-tailed hydrophobic association polymer fracturing thickening agent and a preparation method thereof. The thickening agent is prepared by the following steps: copolymerizing four monomers, namely acrylamide, 2-allyl methylamino sodium ethanesulfonate, methyl diallyl hydroxypropyl sulfobetaine and double-tailed long-chain alkyl allyl sulfoethyl betaine to form gel, chopping, hydrolyzing, neutralizing and purifying. The preparation method comprises the following steps: firstly adding distilled water, adding acrylamide, 2-allylmethylamino sodium ethanesulfonate, methyldiallyl hydroxypropyl sulfobetaine and other remaining raw materials, adjusting the total concentration, introducing N2 to remove oxygen, adding an initiator, reacting to prepare gel, chopping the gel, and hydrolyzing to obtain the water-soluble polymer. The fracturing thickening agent has good water solubility and shows good salt resistance in mixed saline water with the mineralization degree larger than or equal to 30000 mg / L, a prepared linear solution and jelly formed after crosslinking have high viscosity retention capacity at the temperature of 150 DEG C and the shearing rate of 170 s <-1 >, and the actual construction requirement for fracturing yield increase with the on-site mineralization degree larger than or equal to 30000 mg / L is met.

The invention provides a lithium battery positive electrode slurry homogenizing production monitoring method based on a slurry homogenizing device and a lithium battery slurry pipeline type homogenizing system. The method comprises the following steps: stirring and homogenizing positive electrode powder to obtain primary homogenized slurry; performing primary filtering treatment on the primary homogenized slurry to obtain secondary homogenized slurry; performing defoaming treatment on the second-stage homogenized slurry to obtain second-stage cached slurry; and carrying out secondary filtering treatment on the secondary cache slurry to obtain the lithium battery anode homogenate slurry. After being fed into the stirrer, the positive electrode powder is fully stirred, so that primary homogenized slurry is more uniform, then primary filtering treatment and secondary filtering treatment are performed respectively, foreign matters in the slurry are reduced, defoaming is added between the two times of filtering treatment, bubble residues in the slurry are effectively reduced, and the uniformity of the slurry is improved. Therefore, the slurry homogenizing operation is completed at one time, and the positive electrode slurry homogenizing production efficiency is effectively improved.

The invention relates to the technical field of building materials, and discloses fire-resistant decoration waste exterior wall external thermal insulation mortar and a preparation method thereof. The fire-resistant decoration waste exterior wall external thermal insulation mortar comprises the following raw material components in parts by weight: 60-410 parts of cement; 120 to 550 parts of decoration waste recycled aggregate; 36 to 75 parts of SiO2 aerogel; 8 to 17 parts of a silane coupling agent; 1.3 to 2.1 parts of dispersible latex powder; 0.5 to 1.0 part of methyl cellulose; 7-15 parts of a water reducing agent; 0.2 to 0.4 part of an air entraining agent; and 120 to 180 parts of water. According to the invention, the low-cost and high-strength decoration waste recycled aggregate is used for partially replacing expensive and low-strength aerogel, so that the thermal insulation performance of the mortar is ensured, and the material cost is greatly reduced; the decoration garbage exterior wall external thermal insulation mortar can resist high-intensity fire disasters with the highest temperature of 1000 DEG C and the fire receiving time of 2.5 h, and can be applied to exterior wall external thermal insulation systems of high-rise and super high-rise buildings with high fire extinguishing difficulty.

The invention relates to the technical field of electroslag remelting slag. The invention discloses a special slag system for an ingot pulling type electroslag remelting nitrogen-controlled austenitic stainless steel ingot, which comprises the following components in percentage by mass: 45-50% of CaF2, 25-30% of Al2O3, 15-20% of CaO, 3-6% of MgO, 5-10% of SiO2 and the balance of impurities, and the content of the impurities is less than or equal to 1%. The binary alkalinity CaO / SiO2 is 1.5 to 4; the melting point of the special slag system is 1250-1280 DEG C, the viscosity value of the special slag system at the temperature of 1600 DEG C is 0.044-0.053 Pa.s, and the resistivity of the special slag system at the temperature of 1600 DEG C is 0.51-0.55 omega.cm. According to the slag system, by optimizing the components of the slag system, the physical and chemical properties of the slag system are further improved, the slag-metal reaction is inhibited, and the production process requirements of ingot pulling type electroslag remelting large stainless steel ingots are met. The produced nitrogen-controlled austenitic stainless steel ingot is good in surface quality and free of defects such as obvious pits, slag runners and double skins; and easily oxidized elements Al and Si in the steel in the remelting process are uniformly distributed in the height direction of the cast ingot, so that the uniformity of alloy textures is ensured.

The invention relates to a double-tailed hydrophobic associated polymer oil-displacing agent with a benzene ring structure and a preparation method thereof. The oil-displacing agent is formed by copolymerizing three monomers, namely acrylamide, 2-allyl methylamino sodium ethanesulfonate and a hydrophobic monomer double-tailed long-chain alkyl methyl (p-3-carboxyl acrylamide benzyl) ammonium chloride with the benzene ring structure. The preparation method comprises the following steps: firstly adding distilled water, then adding acrylamide, 2-allyl methylamino sodium ethanesulfonate and a hydrophobic monomer double-tailed long-chain alkyl methyl (p-3-carboxyl acrylamide benzyl) ammonium chloride with a benzene ring structure, supplementing water, adjusting the total concentration, introducing N2 to remove oxygen, adding an initiator, and reacting at a certain temperature to prepare the terpolymer. The prepared polymer oil-displacing agent has good water solubility, temperature resistance and shearing resistance, shows good salt resistance in saline water with the mineralization degree larger than or equal to 30000 mg / L and shows a good oil-displacing effect in a heterogeneous core oil-displacing experiment, and the crude oil recovery rate can be increased by 10% or above.

The invention provides a nano foam scrubbing agent suitable for environments with various temperatures and mineralization degrees as well as a preparation method and application of the nano foam scrubbing agent. The nano foam scrubbing agent comprises an anionic surfactant, a nonionic surfactant, a zwitterionic surfactant, foam stabilizing particles and a solvent, the total mass concentration of the anionic surfactant, the nonionic surfactant and the zwitterionic surfactant in the nano foam scrubbing agent is 0.1-1.0 wt%, and the mass concentration of the foam stabilizing particles is 0.1-0.5 wt%; the mass ratio of the anionic surfactant to the nonionic surfactant to the zwitterionic surfactant is (10-30): (15-20): (15-25). The foam scrubbing agent disclosed by the invention has relatively good foaming, foam stabilizing and liquid carrying capacities at 35-95 DEG C in a mineralization degree range of 10000-50000 mg / L, has very good salt resistance and calcium and magnesium ion resistance, and can adapt to environments with various temperatures and different mineralization degrees.

The invention relates to the field of phenolic resin adhesives, and particularly discloses a preparation method of a phenolic resin adhesive for a bamboo oriented strand board, which comprises the following steps: (1) phenol activation: adding phenol and a basic catalyst aqueous solution into a reaction kettle, and activating to form an intermediate state of phenate negative ions; (2) addition stage: adding a high-concentration formaldehyde reactant into the reaction kettle, and carrying out heat preservation reaction to generate hydroxymethyl phenol; (3) heating and replenishing: heating to 80 + / -2 DEG C, keeping the temperature, replenishing the formaldehyde aqueous solution into the reaction kettle, and keeping the temperature for 20-25 minutes; (4) polycondensation stage: adding a basic catalyst aqueous solution, heating to 90 + / -2 DEG C, and carrying out heat preservation reaction; and (5) terminating the reaction: after the heat preservation reaction, detecting the viscosity, cooling, and discharging to obtain the adhesive. The phenolic resin with the solid content of 60% or above can be prepared, the adhesive has excellent bonding performance, and the prepared shaving board is excellent in mechanical strength.

The invention relates to the technical field of fire extinguishing agents, and discloses a thermosensitive lithium battery special fire extinguishing agent and a preparation method thereof.The thermosensitive lithium battery special fire extinguishing agent comprises, by weight, 1-5 parts of a surfactant, 10-25 parts of an aprotic solvent, 2-5 parts of a fire extinguishing agent, 2-5 parts of a microcapsule agent, 3-10 parts of a temperature reducing agent, 2-10 parts of a thermosensitive expanding agent, 1-8 parts of a thermosensitive thickening agent and 70-100 parts of deionized water. According to the special fire extinguishing agent provided by the invention, a thermosensitive expanding agent, a thermosensitive thickening agent and a microcapsule medicament are added into a water-based fire extinguishing agent. And when meeting high temperature of flame, the fire extinguishing agent generates thermal expansion and increases viscosity, so that the adhesive force of the water-based fire extinguishing agent on the surface of the lithium battery is enhanced.

The invention relates to the technical field of meat product fermentation and enzymolysis, and provides a meat product fermentation and enzymolysis device and an enzymolysis method thereof.The meat product fermentation and enzymolysis device comprises an outer cylinder, a core cylinder, a circulating stirring paddle and a fermentation and enzymolysis control unit; the top of the cylinder body of the outer cylinder is provided with a feeding port, and the bottom is provided with a conical cavity; the output port is connected to the bottom of the conical cavity; the core cylinder is arranged in the middle of the outer cylinder and divides the interior of the outer cylinder into a center cavity and an annular cavity, and the top and the bottom of the center cavity are communicated with the top and the bottom of the annular cavity respectively. The circulating stirring paddle is arranged in the central cavity; the fermentation and enzymolysis control unit controls the circulation stirring paddle to rotate, stirs and drives meat to move upwards from the central cavity to enter the annular cavity, moves downwards along the annular cavity and then returns to the central cavity, and the meat and ingredients are mixed in the circulation process; according to the invention, the mixing uniformity between the meat and between the meat and the ingredients containing the enzyme preparation in the fermentation and enzymolysis process is realized, and the taste quality such as the uniformity and toughness of the enzymolysis meat is improved.

The invention belongs to the field of tunnel water plugging grouting materials, and particularly discloses a heat-insulating shrinkage-reducing type water plugging grouting material suitable for a high-temperature hot water tunnel and a preparation method of the heat-insulating shrinkage-reducing type water plugging grouting material. The water plugging and grouting material for the high-temperature hot water tunnel is mainly formed by mixing a multi-element gel composite material component, a heat insulation material component, a reinforcing, toughening and shrinkage reducing component, a water dispersion resisting component, a special admixture for the high-temperature hot water grouting tunnel and the like. The water plugging grouting material for the high-temperature hot water tunnel is suitable for water leakage in the high-temperature hot water tunnel, and has the advantages of good working performance and long-term durability, high material strength, low water permeability coefficient, environmental protection and the like. The setting time of the admixture can be regulated and controlled within 30-5 minutes through the admixture special for the high-temperature hot water tunnel grouting material, and the admixture has good operability so as to meet the construction requirements of actual engineering. Under the synergistic effect of materials with a certain proportioning ratio, the water plugging grouting material has better mechanical properties and durability than a traditional water plugging grouting material, and also has good shrinkage resistance and heat insulation performance. The grouting material disclosed by the invention is good in groutability, easy to inject into tunnel surrounding rock cracks, high in stability, relatively good in later strength and durability, and particularly suitable for water plugging construction of high-temperature hot water tunnels.

The invention discloses a brassica rapa alkali extract with anti-hypoxia activity as well as a preparation method and application of the brassica rapa alkali extract. The method comprises the following steps: by taking brassica rapa tuberous roots as a raw material, rinsing, slicing, drying, crushing, extracting with a food-grade calcium oxide alkaline solution, carrying out centrifugal separation to obtain supernate, and carrying out spray drying on the supernate to obtain the brassica rapa alkali extract. The method is easy to operate, low in cost and high in extraction rate, starch and crude fiber auxiliary components in the brassica rapa tubers can be removed to a large extent, the most important components with health-care functions of brassica rapa are reserved, and the biological activity of nutritional components of brassica rapa is kept. Results of evaluation and biochemical index determination of a normal-pressure closed experiment and a sodium nitrite poisoning experiment show that the brassica rapa alkali extract can remarkably prolong the survival time of mice, improve the activity of superoxide dismutase in the mice and reduce the content of malondialdehyde, and shows a relatively good hypoxia tolerance effect. The alkali extract can be used for developing hypoxia-resistant functional foods such as tabletted candies and biscuits, and has a wide application prospect.

The invention belongs to the field of chemical fibers, and particularly relates to a method for preparing polyester industrial filaments by using recycled polyester chips recycled from bottles and the prepared polyester industrial filaments, regenerated PET chips with the viscosity of 0.65-0.8 dl / g and the filtration value of 0-5 MPa are selected, 1.0-1.3 dl / g regenerated high-viscosity chips are obtained after tackifying, and spinning is carried out on an existing industrial filament production line; the temperature of a screw is controlled to be 280-330 DEG C, and the lengths of a feeding section and a metering section are adjusted, so that the slices are fully melted, meanwhile, it is ensured that a large amount of melt is not degraded due to the fact that the melt contains IPA, and the stability of the outlet pressure of the screw is ensured; a spinning assembly adopts a multi-layer metal filter screen structure of 5-30 [mu] m, so that the problem that the spinning assembly is quickly boosted due to many impurities of regenerated slices is solved; and the stretching and setting conditions are optimized and adjusted, so that the physical property, broken filaments and spinnability can meet the requirements.

The invention provides an efficient desulfurizer, which is used for removing H2S and / or organic sulfur in gas, and comprises an organic solvent and organic alcohol amine, optionally, the efficient desulfurizing agent further comprises at least one of an antioxidant, a corrosion inhibitor and a defoaming agent. The invention also provides desulfurization equipment and a method for removing H2S or organic sulfur in sulfur-containing process gas or sulfur-containing waste gas. The high-efficiency desulfurizing agent provided by the invention overcomes the defects of low sulfur load, high regeneration energy consumption, easiness in degradation, incapability of removing organic sulfur and the like of the traditional desulfurizing agent. The method is suitable for desulfurization and purification treatment of sulfur-containing gases such as high-acidity natural gas, refinery dry gas, liquefied gas and sulfur recovery tail gas.

The invention provides anti-scattering water-guided laser cutting fluid as well as a preparation method and application thereof. The anti-scattering water-guided laser cutting fluid comprises the following components in parts by weight: 0.1-1 part of an anti-scattering agent; 0.01 to 0.1 part of a foam discharging agent; 1-5 parts of a refractive index regulator; and 80-99 parts of ultrapure water. The anti-scattering agent is a polymer; the foam removing agent is one or more of hydroxymethyl cellulose, hydroxy propyl cellulose, sodium lignin sulfonate, potassium lignin sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt; the refractive index regulator is an iodine-containing compound and / or a fluorine-containing compound. According to the anti-scattering water-guided laser cutting fluid, light beam scattering and energy loss in the water-guided laser cutting process can be remarkably reduced, and the cutting precision and efficiency are improved. The anti-scattering water-guided laser cutting fluid has very good application prospects and large-scale industrial popularization potential in the field of water-guided laser cutting.

The invention provides a carbon dioxide flooding thickening agent as well as a preparation method and application thereof. The carbon dioxide flooding thickening agent has a structure as shown in a formula I, the weight-average molecular weight of the carbon dioxide flooding thickening agent is 8000 to 50000. According to the invention, the compound with the structure as shown in the formula I is used for thickening the carbon dioxide, and meanwhile, the weight-average molecular weight of the compound is within a specific range, so that the compound has good solubility with the carbon dioxide, high solubility in the carbon dioxide and good tackifying performance, the viscosity of the carbon dioxide is effectively improved, and the mining efficiency is improved; the use of fluorine-containing and silicon-containing materials is avoided, and the method is green, environment-friendly and low in cost.

The invention relates to the technical field of food, and particularly provides a preparation method and application of an oyster sauce based on Sanzan gum. The Sanzan gum is used as a raw material for preparing the oyster sauce for the first time, the preparation method of the oyster sauce is optimized, the problems of poor stability and high cost of the oyster sauce can be effectively solved, and meanwhile, the texture characteristics of the oyster sauce are improved. More specifically, in the raw materials of the oyster sauce, the flavoring substances comprise oyster juice, edible salt, white granulated sugar, a yeast extract and sodium glutamate; in the stabilizer of the oyster sauce, the ratio of hydroxypropyl distarch phosphate to Sanzan gum is (1-8): (0.1-0.4). The Sanzan gum endows the oyster sauce with relatively good firmness, viscosity, cohesiveness, viscosity index and taste; moreover, the shelf life is prolonged while the addition amount of the Sanzan glue is small, and the production cost of the oyster sauce can be effectively reduced.

The invention relates to the technical field of electrodeposited nickel production, and provides an electrodeposited nickel pore inhibition adding composition which can simultaneously solve the technical problems of pores, acid mist and surface quality in the electrodeposited nickel production process. The composition is prepared from the following components in parts by weight: 0.03 to 0.08 part of anionic surfactant; 0.1 to 0.2 part of a nonionic surfactant; 0.01 to 0.03 part of a hydrogen inhibiting agent; and 1-5 parts of a grain refiner.

The invention discloses a low GI functional bread, and relates to the technical field of food processing. The low GI functional bread includes the following weight portions of cereal raw materials, auxiliary materials and fruit raw materials: 40-50 weight portions of barley, 20-25 weight portions of white highland barley, 15-25 weight portions of buckwheat; 10-15 weight portions of butter; 10-15 weight portions of salt; 0.75-1 weight portions of dry yeast; 5-9 weight portions of apples, and 5-11 weight portions of fresh peaches. The present invention also includes a preparation method of low GI functional bread. The present invention selects low GI content cereal raw materials and fruit raw materials to make low GI bread, which helps to relieve constipation, make people feel full, and improve the functionality of low GI bread; when the rotating roller is pressed in the groove, the sliding part is driven down under the action force of the reset spring, so that the sealing plate blocks the discharge port, and intermittent flour laying is realized on the conveyor belt, which effectively prevents the bread from being connected to the conveyor belt, improves work efficiency, and saves the use of flour.

The invention discloses a double-sided antistatic PE protective film and a preparation method thereof.The protective film sequentially comprises a first antistatic coating, a film base material, a second antistatic coating and a glue layer from top to bottom, and when the protective film is prepared, the back face and the front face of the film base material are coated with the first antistatic coating and the second antistatic coating firstly, a PET release film is coated with glue, and then the first antistatic coating and the second antistatic coating are formed; and then compounding and rolling the PET release film and the protective film, and stripping the PET release film after curing to obtain the double-sided antistatic PE protective film. The PE protective film disclosed by the invention has excellent antistatic stability and adhesive force, the resistivity can reach 105 ohms, and the PE protective film can be used for a long time; meanwhile, the protective film is simple in preparation method, safe and environment-friendly, and raw materials are easy to obtain.

The invention relates to the technical field of material chemistry, in particular to high-precision 3D printing emulsion gel as well as a preparation method and application thereof. The high-precision 3D printing emulsion gel is prepared from an emulsion formed by taking a mixed solution of cellulose nanocrystals and bovine serum albumin as a water phase and vegetable oil as an oil phase. The cellulose nanocrystal and bovine serum albumin are adopted as raw materials to prepare the 3D printing milk gel, and the 3D printing milk gel is green, safe and free of pollution to the environment. By adjusting the ratio and the concentration of the cellulose nanocrystals and the bovine serum albumin, the rheological property of the milk gel can be adjusted, and meanwhile, the prepared milk gel can not generate demulsification and other instability changes within the storage period of one month. Test results show that the 3D printing emulsion gel provided by the invention has a relatively high internal phase volume fraction, so that the viscosity and the storage modulus of the emulsion are increased, and the 3D printing emulsion gel is in a solid state and has the characteristic of shear thinning, so that the 3D printing emulsion gel can be directly used as a 3D printing material without further treatment.

The invention discloses an early-strength polycarboxylate superplasticizer with thickening and water-retaining properties and a preparation method thereof, and relates to the technical field of building materials. The early-strength polycarboxylate superplasticizer is prepared from the following components in parts by weight through free radical copolymerization and condensation polymerization: 360 parts of polyether monomer, 20-40 parts of unsaturated carboxylic acid, 0.1-0.5 part of hydrophobic monomer, 1-30 parts of functional additive, 0.5-3 parts of oxidant, 0.1-1 part of reducing agent, 0.5-2 parts of chain transfer agent and 270-460 parts of water. The invention also provides a preparation method of the water reducing agent. By adjusting the structure of the polycarboxylic acid water reducing agent and grafting functional groups with bonding capacity and early strength function, the water reducing agent which is good in application performance and high in water reducing rate is prepared, and the water reducing agent can remarkably improve the wrapping property of concrete, reduce the bleeding property of the concrete and improve the early strength of the concrete.

The invention discloses a preparation method of a crystalline silicon solar cell. The preparation method comprises the following steps: arranging a function adjusting layer on and / or in a passivation dielectric layer; electrode slurry is printed on the passivation dielectric layer and corresponds to the position of the function adjusting layer; sintering to form a metal electrode; the function adjusting layer comprises at least one of compounds containing specific cations, the compounds containing the specific cations can release the specific cations at the sintering temperature, and the specific cations are cations corresponding to elements involved in the glass network formation. According to the preparation method, minority carrier recombination can be effectively reduced, the passivation effect of the battery is improved, and the conductivity of the metal electrode is effectively improved.

The invention provides a backlight source module with multiple heat dissipation assemblies, and relates to the technical field of LCD screen backlight, a semiconductor chilling plate is powered on to generate low temperature, cooling liquid in a storage cavity is cooled through a fin heat dissipation disc, and a control panel controls a PCB magnetic board to be powered on periodically at regular time; the PCB magnetic plate can enable a metal sheet at the bottom end of an elastic rubber film to be attracted downwards, the elastic rubber film is pulled by the metal sheet to deform, when the PCB magnetic plate is powered off, the elastic rubber film is reset under the action of elasticity, cooling liquid entering a liquid pumping cavity is squeezed into a flow guide groove after the elastic rubber film is reset, and the cooling liquid enters the flow guide groove. And the four flow guide grooves are formed in the aluminum alloy supporting plate, so that the flowing distance of the cooling liquid is reduced by three quarters, the heat absorption capacity of a single strand of cooling liquid is improved, the heat dissipation effect is more uniform, and the heat dissipation efficiency is improved.

The invention relates to the technical field of metal cutting fluid, in particular to ester-based semi-synthetic cutting fluid and a preparation method thereof.The ester-based semi-synthetic cutting fluid comprises, by mass, 50-70 parts of ester base oil; 10-20 parts of an environment-friendly emulsifier; 5-10 parts of a nano additive; 5-10 parts of a self-repairing lubricant; 1-5 parts of a low-carbon additive; 0.5 to 1 part of polyvinyl alcohol; the self-repairing lubricant is divided into a reagent A and a reagent B according to a ratio of (5-7): (3-5), the reagent A and the nano additive are mixed, polyvinyl alcohol is added to form a suspension, and the suspension is added into a reaction system; the reagent B is directly added into a reaction system. The invention aims to optimize the dispersibility of nanoparticles and maintain the overall stability and performance of the cutting fluid. The cutting fluid actively responds to the environmental protection concept of carbon peak reaching and carbon neutralization while pursuing efficient lubrication, rust prevention and cleaning performance, and aims at reducing carbon emission in the cutting process and promoting green manufacturing.