1373 results about "Paraffin wax" patented technology

The present invention pertains to the technical field of phase-change temperature-reducing materials, and in particular, relates to a phase-change temperature-reducing polyurethane composite material, and a preparation method and application thereof, comprising the following parts by mass of raw materials: 50-80 parts of polyurethane material A+polyurethane material B, 1-3 parts of flake graphite powder with a particle size of 850-1200 meshes, 0.8-1.8 parts of vermicular graphite with a particle size of 10-40 meshes, 10-30 parts of phase-change paraffin, 1-3 parts of activated carbon, 0.5-2 parts of catalyst, and 0.2-1 parts of co-catalyst. The polyurethane composite material made in the present invention is rapid in phase-change temperature reduction, high in heat absorption and dispersion, and free of problems of phase-change paraffin leakage, crystallization, and frosting on the surface thereof. At the same time, it also has softness and high elasticity, and can be widely applied to objects in contact with human bodies. A temperature difference is formed by reducing the temperature of the surface in contact with skin, which can bring a comfortable sense of coolness and a temperature-reducing effect to consumers.

The invention provides a paraffin-based phase change microcapsule and a preparation method thereof. The preparation method comprises the following steps: S1, adding an acetic acid solution into a silane coupling agent to adjust the pH to be acidic, then adding nano aluminum oxide, carrying out ultrasonic treatment and water bath reaction, centrifuging to take a solid, and washing to be neutral to obtain a modified aluminum oxide aqueous solution; s2, adding an aqueous solution containing an emulsifier into the molten paraffin solution, and uniformly stirring in a constant-temperature water bath to obtain an emulsified solution; s3, slowly dropwise adding the modified aluminum oxide aqueous solution into the emulsified solution, and performing in-situ polymerization to obtain the paraffin-based phase change microcapsule. The paraffin-based phase change microcapsule obtained by dropwise adding the modified aluminum oxide aqueous solution into the emulsified solution through in-situ polymerization is appropriate in particle size and has the characteristics of low supercooling property, good heat storage property and high heat conductivity, and in addition, the paraffin core is tightly coated with the modified aluminum oxide shell layer, so that paraffin leakage can be effectively prevented.

The invention provides a composite material with excellent heat insulation performance, which relates to the field of fireproof heat insulation structures, and sequentially comprises a fireproof layer, a transition layer, a first protection layer, a first heat insulation layer, a second heat insulation layer and a second protection layer, wherein the fireproof layer adopts an intumescent fireproof coating, the transition layer adopts a primer, the first protection layer and the second protection layer adopt metal titanium foils, the first heat insulation layer adopts an aerogel felt, the second heat insulation layer adopts a phase change material, the phase change material is formed by compounding a phase change raw material and a base material, and the phase change raw material is microcapsules. A packaging material of the microcapsule is a mixture of melamine, formaldehyde and urea, and a phase change inner core of the microcapsule is paraffin; the base material is epoxy resin. The composite material not only has the characteristics of excellent fireproof and heat-insulating performance, thin thickness, light weight, good long-term stability and the like, but also has the advantages of simple structure, convenience in installation, wide application range and the like.

The invention discloses a mechanical polishing pad with a CMP composite groove and a preparation method of the mechanical polishing pad, and belongs to the technical field of polishing pads. The mechanical polishing pad comprises a polishing layer, a bonding layer and a substrate layer, and the polishing layer is bonded to the surface of the substrate layer through the bonding layer; the bonding layer is prepared from the following raw materials in parts by mass: 47 to 50 parts of EVA resin, 35 to 36 parts of tackifier, 8 to 12 parts of paraffin, 3 to 7 parts of filler and 0.5 to 2 parts of antioxidant. The mechanical polishing pad solves the problem that when an existing mechanical polishing pad is used, a groove of the mechanical polishing pad cannot well convey polishing liquid, the mechanical polishing pad cannot be well supported, and the mechanical polishing effect is poor. The polishing liquid conveying performance of the mechanical polishing pad can be improved, the mechanical polishing pad is prevented from deforming during polishing, it can be guaranteed that polishing pressure is evenly transmitted, the size stability and the compression permanent deformation resistance of the mechanical polishing pad can be improved, and the mechanical polishing effect can be effectively improved.

The invention discloses a sheath material for a saline-alkaline-resistant dragging cable, a preparation method of the sheath material, the cable and the sheath material. The sheath material is prepared from the following raw materials in parts by weight: 40 to 45 parts of chlorinated polyethylene, 1.5 to 2.0 parts of dicumyl peroxide vulcanizing agent, 2 to 2.5 parts of triisocyanate vulcanizing agent, 0.1 to 0.3 part of ethylene thiourea accelerant, 0.05 to 0.15 part of anti-aging agent RD, 4 to 5 parts of metal oxide, 1 to 1.5 parts of paraffin, 8 to 10 parts of calcium carbonate, 15 to 21 parts of reinforcing agent, 1 to 1.5 parts of lead stearate, 0.5 to 1 part of lead sulfate tribasic, 1 to 1.5 parts of ultraviolet light absorber, 3 to 5 parts of epoxidized soybean oil and 8 to 8 parts of chlorinated paraffin. 9 parts of antimony trioxide and 3-4 parts of antimony trioxide. The cable has the advantages of ultraviolet resistance, no salt deposition, water resistance, tensile resistance, cold resistance and the like, can be used for a long time in a special operating environment, has the service life of at least more than 3 years, and avoids frequent replacement of the cable by a user.

An electronic candle includes: a wax tube, a battery compartment, a PCBA board, and a light string. The wax tube is cylindrical and made from paraffin wax. The wax tube defines a cavity therein and has a first end and a second end, the second end defines an opening communicated to the cavity. The battery compartment is inserted into the cavity from the second end, the battery compartment has a third end and a fourth end, the fourth end defines an opening facing towards the first end. The PCBA board is inserted to the fourth end. At least a portion of the PCBA board is exposed to the cavity. The light string is extending spirally and arranged on an outer surface of the wax tube. The light string extends through the wax tube to be electrically connected to the exposed portion of the PCBA board.

The utility model relates to the technical field of paraffin oil cooling of pill dropping equipment, and discloses paraffin oil cooling circulation equipment which comprises a paraffin oil box, a cooling tank, a cooling machine and a circulating pump, the paraffin oil tank is provided with a first oil outlet pipe, a first oil inlet pipe, a second oil outlet pipe and a second oil inlet pipe; the first oil outlet pipe and the first oil inlet pipe are respectively configured to be communicated with two ends of a cooling pipe in the pill dropping machine; a cooling pipeline is arranged in the cooling tank, the bottom of the cooling tank is provided with an oil inlet end and an oil outlet end which are communicated with the two ends of the cooling pipeline respectively, the oil inlet end is communicated with the second oil outlet pipe through a pipeline, and the oil outlet end is communicated with the second oil inlet pipe through a pipeline; the input end and the output end of the cooling machine are both communicated with the cooling tank; and the circulating pump is arranged on a pipeline between the second oil outlet pipe and the oil inlet end of the cooling tank. The paraffin oil cooling circulation equipment provided by the utility model can solve the problem of how to improve the heat dissipation efficiency of the paraffin oil.

The invention relates to the technical field of wax emulsions for yarn weaving, in particular to a wax emulsion which has spinnability, hand feeling and stability and is free of layer difference and a preparation method and application of the wax emulsion. The wax emulsion comprises a component A and a component B, wherein the component A is selected from two or more of oxidized modified polyethylene wax, fatty alcohol-polyoxyethylene ether and paraffin; the component B is prepared from the following components in percentage by weight: 2.5 to 5 percent of a cationic surfactant, 2.5 to 5 percent of a nonionic surfactant, 0.1 to 0.5 percent of an antibacterial agent, 0.5 to 1 percent of a pH regulator and the balance of water. The wax emulsion provided by the invention has excellent lubricating effect, softening effect and permeation effect, has no middle-outer layer difference and excellent stability, and does not influence the color light and fastness of a dyed fabric.

The invention relates to the technical field of microcapsule encapsulation, and a novel preparation method is adopted to prepare microcapsule perfume. The microcapsule takes natural gelatin and paraffin as composite wall materials, a gradient structure is formed by optimizing the mass ratio (1: 2.5-1: 3.75), the gelatin provides mechanical support, and the paraffin endows hydrophobicity and thermal control release characteristics. Dissolving a solution in which the mass volume ratio of gelatin to water is (1: 2.5)-(1: 3) under an ultrasonic condition; mixing the molten paraffin with the liquid spice and the emulsifier to form an oil phase; the oil phase and the gelatin solution are mixed through magnetic stirring at the rotating speed larger than or equal to 800 rpm till the solid phase and the liquid phase are completely fused; after cooling and curing, separating to obtain the solid microcapsule. And when the temperature reaches the melting point (45-65 DEG C) of paraffin, the wall material is molten and quickly releases the perfume, and the slow release performance is excellent at normal temperature. The material is wide in application field and high in compatibility, and has the advantages of being green, safe, high in environmental stability and controllable in trigger release.

The invention relates to the technical field of concrete detection, and particularly discloses a device for detecting the working performance of concrete and a use method of the device. The mounting unit is arranged in the detection box and comprises a top plate, a bottom plate and a lifting plate; the test piece placing unit is arranged on the upper end face of the bottom plate and comprises a placing cylinder and a lower sealing ring, a paraffin filling cavity is formed between the placing cylinder and the concrete test piece, and a paraffin storage area communicated with the paraffin filling cavity is further arranged in the placing cylinder; the sealing cover detection unit is arranged on the lower end face of the lifting plate and comprises an upper sealing cover and an upper sealing ring. The upper sealing ring and the lower sealing ring are used for sealing outer rings of the upper end face and the lower end face of the concrete test piece, then molten paraffin is used for filling, wrapping and sealing a paraffin filling cavity on the periphery of the concrete test piece, the overall sealing effect is effectively improved, and water is prevented from leaking from the peripheral face of the concrete test piece in the anti-permeability detection process; and the precision and stability of the detection effect are ensured.

The invention relates to the field of packaging film materials, and particularly discloses a packaging film material with a temperature control function and a preparation process of the packaging film material. The packaging film material with the temperature control function comprises an upper layer and a lower layer, the lower layer comprises the following raw materials in parts by weight: 40-56 parts of a polyethylene matrix, 3-5 parts of phase change microcapsules and 4-8 parts of heat conduction fibers, core materials of the phase change microcapsules are tetradecane and paraffin, and capsule wall materials are calcium carbonate; the upper layer comprises the following raw materials in parts by weight: 45-58 parts of polyester; in addition, the preparation method has the advantage of improving the thermal insulation performance of the membrane material.

The invention discloses a phase-change material loaded steel fiber as well as a preparation method and application thereof, and belongs to the technical field of concrete preparation. Paraffin and the like are used as phase-change materials, the phase-change temperature of the phase-change materials is well matched with the peak value of hydration heat of concrete, a large amount of heat can be absorbed in the hydration process of the concrete, the internal temperature rise of the concrete is effectively reduced, the temperature stress is reduced, and cracks are inhibited; the steel fiber loaded with the phase-change material is subsequently doped into the concrete according to the doping amount of 40-60kg / m < 3 >, and the reinforcing effect of the steel fiber and the temperature control effect of the phase-change material have a synergistic effect, so that the strength and toughness of the concrete are remarkably improved, and the concrete has better mechanical properties and durability; an innovative thought and an effective way are provided for preparation of a high-performance concrete material, and the method has a wide application prospect and huge economic benefits in the field of constructional engineering.

The invention relates to the field of coatings, and discloses a biomass-based oil-resistant coating and a preparation method thereof, the coating comprises an additive solution, a paraffin solution and gallic acid; the paraffin solution is obtained by dissolving paraffin in absolute ethyl alcohol; a preparation method of the additive solution comprises the following steps: mixing chitosan powder and an acetic acid aqueous solution to prepare a chitosan solution, ultrasonically dispersing functionalized montmorillonite in deionized water to prepare a suspension, then uniformly mixing the chitosan solution and the suspension, adding modified phytic acid prepared by grafting phytic acid and ethylene glycol diglycidyl ether, and stirring to react; the functional montmorillonite is prepared by modifying modified montmorillonite with titanium dioxide and zinc oxide, then activating the modified montmorillonite with 3-aminopropyltriethoxysilane and succinic anhydride, and then carrying out a ring-opening reaction with glycidyl neodecanoate. The coating prepared by the invention has high water resistance, the Kit oil-proof grade is kept at grade 12, and the oil-proof performance of the coating is greatly improved. Meanwhile, the antibacterial performance, the tensile index and the ultraviolet aging resistance are relatively high.

A mesh filter for a fuel system of a vehicle may include: a frame for maintaining a shape thereof; a mesh member coupled to the frame so as to remove foreign substances contained in fuel, where the mesh member includes a first mesh member and a second mesh member; and an opening unit for opening and closing a fuel path in the first mesh member. In particular, the second mesh member has a mesh size smaller than a mesh size of the first mesh member such that the mesh filter inhibits clogging of the mesh filter with paraffin wax.

The invention relates to the technical field of plants, in particular to a paraffin embedding method for reducing plant RNA degradation. In the plant paraffin embedding method provided by the invention, a stationary liquid for fixing plant tissues is prepared from absolute ethyl alcohol and acetic acid in a volume ratio of (2-5): (1-4); buffer I used for dehydration is absolute ethyl alcohol and n-butyl alcohol with the volume ratio of (1-3): (1-2); buffer II used for waxing is n-butyl alcohol and low-temperature paraffin wax with the volume ratio of (1-3): (1-2), and the melting point of the paraffin wax is 20-50 DEG C. According to the method, low-temperature paraffin with the melting point of 20-50 DEG C is adopted, and a reagent for paraffin embedding and a paraffin embedding process are adjusted, so that the plant section with relatively high RNA integrity and relatively high tissue structure integrity is obtained. The paraffin embedding method provided by the invention is suitable for different types of molecular biology experiments of space transcriptome, immunohistochemistry, immunofluorescence and the like.

The invention discloses a paraffin and liquid metal composite phase change energy storage radiator, and relates to the technical field of radiators, the paraffin and liquid metal composite phase change energy storage radiator comprises an upper shell and a lower shell which are arranged in a split manner, the upper shell is provided with an upper heat dissipation groove, the lower shell is provided with a lower heat dissipation groove, the upper shell is embedded in the lower heat dissipation groove, a heat dissipation cavity is formed between the lower heat dissipation groove and the upper heat dissipation groove, and the upper shell and the lower shell are provided with heat dissipation holes. A liquid metal filling cavity is formed in the position, corresponding to the high-power chip, of the heat dissipation cavity, a paraffin filling cavity is formed in the position, corresponding to the low-power chip, of the heat dissipation cavity, the paraffin filling cavity and the liquid metal filling cavity are separated through an annular liquid cooling flow channel, and a plurality of air cooling flow channels are formed in the bottom of the lower shell in a penetrating mode. The low-melting-point liquid metal is combined with a traditional phase change energy storage radiator, the high heat conductivity of the liquid metal is utilized, heat of a chip with large power consumption is conducted to a heat storage area of a phase change material more rapidly, and the heat dissipation problems that the requirement for the overall heat capacity of an electronic component is high, and a large chip needs to be subjected to rapid temperature equalization are effectively solved.

The invention discloses a slow-release hydration heat inhibitor and a preparation method thereof, and relates to the technical field of concrete admixtures, the slow-release hydration heat inhibitor comprises, by mass, 60-70 parts of a dissolution heat absorption component, 10-20 parts of a hydration reaction adjusting component, and 20-30 parts of a temperature control heat absorption component; the dissolving heat absorption component comprises one or more of calcium nitrate, ammonium nitrate or potassium nitrate, and the temperature control heat absorption component comprises the following components in percentage by mass: 70-80% of paraffin and 20-30% of barium hydroxide octahydrate. The slow-release hydration heat inhibitor is obtained by sequentially wrapping mixed particles formed by a dissolution heat absorption component and a hydration reaction adjusting component with barium hydroxide octahydrate and paraffin from inside to outside. The slow-release hydration heat inhibitor disclosed by the invention can realize step-by-step regulation and control aiming at the problem of large hydration heat release of mass concrete, the hydration heat of the mass concrete is remarkably reduced, and the risk caused by temperature difference shrinkage cracks of the concrete is greatly reduced.

The invention relates to the technical field of phase change energy storage materials, in particular to a phase change wax composite material and a preparation method thereof. The phase change wax composite material is prepared from the following raw materials in parts by mass: 60 to 66 parts of modified paraffin, 4 to 6 parts of elastomer, 20 to 25 parts of modified heat-conducting filler and 6 to 9 parts of flame retardant. Through multi-scale interface design and component function cooperation, the performance bottleneck of a traditional phase change material is broken through, unification of high energy storage density, efficient heat management and long-acting safety is achieved, and the phase change material is particularly suitable for application scenes needing efficient energy storage and heat management.

The invention is directed to chemical processing of light paraffins. The furnace unit of the hydrocarbon feedstock pyrolysis plant comprises a unified frame of the furnaces group of the pyrolysis plant, having a 3D-arched shape, indirect quenching exchangers, secured on the back end wall of the pyrolysis plant with an inlet nozzle opposite to the pyrolysis plant furnace outlet of the last reaction tube of pyrolysis coil, and the inner loop of the frame of pyrolysis unit furnaces group which is the same distance away from the casing of the pyrogas direct oil quenching column. Each furnace is individually connected with the pyrogas direct oil quenching column using its own transfer line. The circulating oil flow is supplied separately into each transfer line. The pyrogas and circulation oil are supplied into each transfer line by an injector device. An increase in the output of the pyrolysis plant for the processed raw materials along with an increase in the yield of target olefins to optimal parameters, optimal performance of each furnaces section of hydrocarbon feedstock pyrolysis plant and the furnace unit in whole, are provided.

The invention belongs to the technical field of heat-conducting phase-change materials, and relates to a low-heat-resistance low-pumping-out heat-conducting phase-change material and a preparation method thereof.The heat-conducting phase-change material is prepared from, by weight, 2-15 parts of base resin, 1-3 parts of modified phase-change wax, 90-95 parts of filler, 0.5-2 parts of coupling agent and 0.1-0.5 part of antioxidant; the base resin is polyolefin with the end capped by double hydroxyl groups; the modified phase change wax is phase change wax grafted with maleic anhydride groups. According to the heat-conducting phase-change material disclosed by the invention, hydroxyl-terminated polyolefin rubber is used as basic resin, modified paraffin grafted with a maleic anhydride group is used as phase-change wax, and the maleic anhydride group grafted with the phase-change wax can chemically react with hydroxyl of the basic resin, so that a cross-linked network is constructed in a system, and temperature cycle pumping is reduced; meanwhile, the crosslinking degree of the system can be controlled by reasonably matching the ratio of the basic resin to the modified phase change wax, so that low thermal resistance is kept.

The present invention relates to an insulating rubber sheath cable repair strip and a preparation method and application thereof. The insulating rubber sheath cable repair strip comprises a reinforcing tensile element and a re-vulcanizable rubber strip, wherein the reinforcing tensile element is arranged at the center of the re-vulcanizable rubber strip; the re-vulcanizable rubber strip comprises: 86-90 parts of chlorinated polyethylene, 10-14 parts of ethylene propylene rubber, 10-14 parts of magnesium oxide, 7-9 parts of flame retardant, 0.7-0.9 parts of antioxidant, 10-14 parts of carbon black, 13-17 parts of white carbon black, 18-22 parts of clay, 10-14 parts of talc, 13-17 parts of plasticizer, 10-14 parts of diisooctyl adipate, 0.7-0.9 parts of paraffin wax, 0.9-1.1 parts of polyethylene wax, 2.3-2.7 parts of vulcanizing agent, and 1.8-2.2 parts of vulcanizing agent. The present invention solves the problems of facilitating the repair of cable sheaths and facilitating production, more effectively saving costs and reducing safety.

The invention discloses a method for multi-scale characterization of wax-bearing pipeline crude oil crystallization nucleation characteristic influence, which comprises the following steps: obtaining characteristic component parameters of wax-bearing crude oil liquid alkane and wax crystals, and determining basic physical property parameters of wax-bearing crude oil molecule simulation; determining molecular models of different basic physical property parameters, performing coarse graining processing according to topological structures of different molecules, and calculating interaction parameters among particles; and verifying the interaction parameters among the particles, calculating density and solubility parameters, comparing the density and solubility parameters with experimental data, determining a simulation method and verifying the accuracy of force field parameters. Through the microcosmic action mechanism of molecules, the formation process of the three-dimensional network structure formed by paraffin crystals is accurately described under the mesoscale, and technical support is provided for improving the gelling characteristic and modification mode of wax-containing crude oil.

The invention relates to the technical field of oil well paraffin removal and prevention, and discloses a paraffin removal and prevention agent for an oil well shaft and a preparation process. The paraffin remover and inhibitor for the oil well shaft comprises the following components in parts by weight: 10-25 parts of a compound surfactant, 15-30 parts of a mutual solvent, 5-10 parts of a stabilizer, 1-10 parts of a novel wax crystal improver, 0.2-0.5 part of a rapid penetrant, 0.5-1.5 parts of alkali and 25-70 parts of water, the novel wax crystal improver has a structure similar to that of paraffin, and wax crystals can be dissolved in the novel wax crystal improver, so that the wax crystals are not easy to gather and deposit on a pipe wall, and the dissolution rate of the wax crystals is further improved; sodium sulfonate in the structure has strong polarity and hydrophilicity, can adjust the crystallinity of paraffin inhibitor molecules, has a synergistic effect with asphalt, colloid and the like in crude oil, reduces the surface tension of water, has a good wetting effect, and improves the low-temperature fluidity of the crude oil.

The invention provides a phase change enhanced ablation-resistant modified liquid silicone rubber material as well as a preparation method and application thereof, and belongs to the field of advanced materials. According to the invention, paraffin is adopted as a phase change filler, so that the ablation resistance and heat insulation performance of the expanded ceramic liquid silicone rubber material are remarkably improved, and the prepared silicone rubber composite material has the advantages of low density, low ablation surface temperature, strong carbon layer and high heat absorption capacity. The phase-change reinforced modified expanded ceramic flexible ablation-resistant material further improves the ablation resistance and high-temperature heat insulation performance of a liquid silicone rubber material, and has a good application prospect in the fields of aerospace thermal protection, building heat insulation and the like.

The utility model relates to the field of belt tensioning, and discloses a novel belt tensioning mechanism for a paraffin forming machine, which comprises a fixing plate, a fixing groove is arranged on the front side wall of the fixing plate, the upper portion of the fixing groove is through, sliding strips are fixedly connected with the left inner side wall and the right inner side wall of the fixing groove, the sliding strips extend up and down, and a moving plate is arranged in the fixing groove. The moving plate is in sliding fit with the fixing groove, sliding grooves are formed in the left and right side walls of the moving plate and are in sliding clamping fit with the sliding strips, a fixing seat is fixedly connected to the middle of the top of the front side wall of the moving plate, and the top of the fixing seat is rotationally connected to the bottom of the lead screw. The vertical position of the tensioning wheel can be accurately adjusted by rotating the lead screw, so that the tightness of the belt is accurately controlled, the tensioning degree can be adjusted only by rotating the rotating rod, and the operation is simple and convenient.

The invention discloses a heating energy-storage snow-melting anti-cracking pavement structure system for a road. The system comprises a heat-conducting anti-cracking modified asphalt concrete surface layer, a temperature-adjusting emulsified asphalt macadam layer, a heating anti-cracking steel wire reinforced net, a heat-conducting anti-cracking asphalt concrete bottom layer, an energy-storage cement stable base layer, a PLC (Programmable Logic Controller), an energy storage battery, a solar panel and a temperature sensor. Through the heating function of the heating device, the whole road surface is heated, the road surface is uniformly heated, snow accumulation and icing on the road surface are prevented, and the ice and snow removing cost is reduced; the copper-plated steel fibers are added to the surface layer and the bottom layer of the asphalt concrete, so that the conductivity of the asphalt concrete is improved, and the heat-conducting capacity of the asphalt concrete is enhanced; graphite powder in the temperature-adjusting emulsified asphalt macadam layer has better uniform heat conduction performance, so that the emulsified asphalt macadam layer can form a uniform ultrathin heat conduction'panel '; a certain proportion of paraffin is added into the cement-stabilized base layer, the paraffin releases heat in a low-temperature state, and cracking caused by icing of water in the cement-stabilized base layer is prevented.

The invention relates to a preparation method of a blocky solid defoaming agent, which comprises the following steps: premixing a defoaming active matter and an emulsifier, stirring and mixing with paraffin at a certain temperature, and cooling and molding the mixed material to obtain the blocky solid defoaming agent. Wherein the emulsifier can ensure that the defoaming active matter can be uniformly dissolved and dispersed in a foaming system, so that an excellent defoaming effect is achieved. Paraffin is relatively high in hydrophobicity, so that not only can the performance of the product be enhanced, but also the blocky product can be ensured to realize a long-term foam eliminating and inhibiting function in flowing foaming liquid.

The invention belongs to the technical field of thick oil emulsification viscosity reduction, and particularly discloses an amphiphilic Janus carbon nanotube thick oil emulsification viscosity reducer and a preparation method and application thereof, and the preparation method comprises the following steps: firstly, adding a multi-walled carbon nanotube into a strong acid solution; secondly, adding a first solvent, and then adding molten paraffin to obtain paraffin microspheres wrapped by activated carbon nanotubes; thirdly, adding into a second solvent, so as to obtain carbon nanotube paraffin microspheres asymmetrically modified by vinyl trimethylsilane; and finally, adding into a third solvent to react with the first modifier, and then adding into a fourth solvent to react with the second modifier to obtain the viscosity-reduced Janus carbon nanotube. According to the amphiphilic Janus carbon nanotube thick oil emulsifying viscosity reducer as well as the preparation method and the application thereof, the viscosity reduction rate reaches 99.47%, the amphiphilic Janus carbon nanotube thick oil emulsifying viscosity reducer has excellent wetting reversal and interfacial tension reduction capability, the recovery efficiency is improved by more than 25%, and the recovery efficiency improvement effect is remarkable.

The invention relates to the technical field of precision casting of turbine blades, in particular to a ceramic core for a nickel-based superalloy isometric crystal hollow turbine blade and a preparation method of the ceramic core. The ceramic core is prepared by mixing refractory powder and a paraffin-based plasticizer and then sintering the mixture at a high temperature, and the mass ratio of the refractory powder to the paraffin-based plasticizer is (75-85): (15-25); the refractory powder is composed of quartz glass powder, alumina powder and natural crystalline flake graphite, and the mass ratio of the quartz glass powder to the alumina powder to the natural crystalline flake graphite is (72-77): (20-25): (0.5-3); the paraffin-based plasticizer is prepared from refined paraffin, beewax and low-density polyethylene, and the mass ratio of the refined paraffin to the beewax to the low-density polyethylene is (40-50): (40-50): (5-10). The natural flake graphite is creatively added into the raw materials of the ceramic core, so that the flowability of slurry is improved, the high-temperature bending strength of the ceramic core is improved, and the depoling performance of the mold core is improved.

The invention discloses an emitter with metal powder wrapped by carbon fibers, and belongs to the technical field of door breaking devices. The emitter comprises an emitter head, the emitter head comprises a carbon fiber enveloping body with a closed cavity and metal powder arranged in the closed cavity of the carbon fiber enveloping body, and the closed cavity of the carbon fiber enveloping body is filled with the metal powder; and the metal powder body is a metal powder and paraffin gel body. On one hand, the carbon fiber enveloping body is adopted to seal and wrap the metal powder body, so that the situation that the metal powder body is disintegrated or broken in the cartridge case and leaks into the air guide hole or remains in the gun barrel is avoided; and on the other hand, the metal powder body is a metal powder and paraffin congelation body, the metal powder body is rapidly broken after impacting the door lock, rebounding is not prone to occurring, and the threat to the personal safety of a shooter cannot be caused.