68results about How to "Penetrate fast" patented technology

The invention relates to an open-air coal yard dynamic dust raising inhibitor and a preparation method and a preparation device thereof, and the inhibitor comprises the following components in percentage by weight: 3-5% of pulverized coal, 5-10% of starch grafted acrylic polymer, 5-10% of lauryl sodium sulfate, 5-10% of acrylamide, 5-10% of modified starch and the balance of water. 1-2% of a starch grafted acrylic polymer; 0.03 to 0.05 percent of lauryl sodium sulfate, 0.1 to 0.5 percent of acrylamide and 1 to 2 percent of modified starch; sodium dodecyl sulfate is chemically pure, and the inhibitor has the following advantages that 1, the inhibitor has good wettability and permeability, and can rapidly permeate into coal, effectively fix dust on the surface of sandy soil, reduce wind erosion and form a hard consolidation layer, so that the purpose of controlling and improving the sand damage environment is achieved; 2, the inhibitor has flexible coagulation property, and the inhibitor can cover the surface of dust, so that fine dust particles are coagulated into larger particles; and 3, the dust remover has certain viscosity and can effectively adsorb dust particles and reduce flying of the dust particles. And 4, manufacturing and spraying of the inhibitor are automatically controlled by the inhibitor preparation device, and the efficiency is high.

The invention provides a method for preventing and controlling avocado bark beetle, and belongs to the technical field of avocado pest control, and the method comprises the following steps: removing damaged branches, arranging traps, and arranging pest sticking plates: arranging one bark beetle sticking plate on each plant which is freshly damaged by bark beetle, in the eclosion flying period of the adult trophy beetles in May to October every year, pesticide is mixed with water to conduct branch spraying, spraying is mainly conducted on newly-invaded plant branches, it is guaranteed that bark of the whole trunk is wet, spraying is conducted once every 15-20 days according to the harm situation, pesticide is continuously sprayed for 2-3 times, and punching and pesticide injection are conducted on the trunk; the method comprises the following steps of: after invasion of the small round chest bark beetles and in an active period of offspring larvae, injecting a pesticide into holes in trunks, injecting the pesticide once every 20-25 days, and continuously injecting for 2-3 times. Physical prevention and control are combined with chemical prevention and control measures, the number of beetle insects can be effectively reduced, and therefore the situation that beetle insects damage avocado fruit trees is reduced.

The invention discloses a method for improving cell growth and expression by changing an iron form in a culture medium, and relates to the technical field of cell culture, the culture medium comprises a basic culture medium, a supplemented culture medium and an iron source; wherein the iron source is FeCl3, the basic culture medium and the supplementary culture medium are commercially available culture media, the iron source is not added or removed, and the culture media further contain a three-dimensional culture material; the redox balance of the culture medium can be maintained, oxidative stress damage of cells is prevented, hydrolysis or precipitation is not prone to occurring, the preparation process of the culture medium is simplified, and the requirements of cell growth and expression are met.

The invention discloses a polypropylene film suitable for a film lamination method and a preparation method of the polypropylene film. The polypropylene film comprises the following components in parts by weight: 85.6-91.85 parts of polypropylene; 4-7 parts of long-chain branched polypropylene; 4-7 parts of a compatibilizer; 0.05 to 0.1 part of a nucleating agent; and 0.1 to 0.3 part of an antioxidant. Firstly, polypropylene is selected, so that the wettability of a melt to carbon fibers is effectively improved, and the filling defect caused by high viscosity of a traditional material is overcome; and secondly, the compatibilizer is introduced to form firm chemical bonding with the fiber surface, so that the interface bonding strength is greatly enhanced. And finally, by combining a precise extrusion and casting process, the prepared polypropylene film is uniform in thickness, excellent in interface performance and suitable for a film lamination method.

The invention discloses a wall corner waterproof roll easy to stick to a wall and a preparation method thereof.The waterproof roll is composed of a first polypropylene fiber non-woven fabric layer, a first adhesive layer, a middle layer, a second adhesive layer and a second polypropylene fiber non-woven fabric layer, the two polypropylene fiber non-woven fabric layers are each formed by weft knitting and interweaving of two strands of polypropylene fibers with different single fiber numbers, and the middle layer is made of polypropylene fibers with different single fiber numbers. The moisture absorption of the polypropylene fibers with large number of single fibers is better than that of the polypropylene fibers with small number of single fibers, so that the cement can more quickly permeate into the polypropylene non-woven fabric layer from the outside of the polypropylene non-woven fabric layer, the cement one-way material guiding function can be achieved, the waterproof roll can be better and more quickly attached to a wall surface tightly, and the waterproof effect is better. The waterproof coiled material can be prevented from being separated from and folded down from a wall surface coated with cement, time and labor are saved, and the paving efficiency of the waterproof coiled material is improved. In addition, the waterproof coiled material has good waterproof performance, chemical resistance, weather resistance and excellent mechanical strength, has a small expansion coefficient, and is light in weight and good in flame retardant property.

The invention relates to the field of hygienic products, provides a bacteriostatic absorption core body and a preparation method thereof, and solves the problems that an existing bacteriostatic absorption core body does not have an anticoagulation function, and Ag < + > is easy to migrate to a human body in a manner of coating and adding Ag < + > or the bacteriostatic effect is relatively poor in a manner of coating and adding Ag < + >. The antibacterial absorption core body comprises a lower non-woven fabric layer, an SAP and modified PET fiber mixture layer, a sizing layer and an upper non-woven fabric layer which are sequentially laminated from bottom to top; wherein the SAP and modified PET fiber mixture layer is obtained by mixing SAP and modified PET fibers and then carrying out negative pressure adsorption, conveying and forming, and the modified PET fibers comprise the following raw materials: acetone, absolute ethyl alcohol, PET fibers, sodium periodate, dopamine hydrochloride, N, N-dimethylformamide, propylene glycol monomethyl ether, a silver ammonia solution, azodiol enamine, hydrochloric acid, N, N-dimethylformamide and deionized water.

The invention relates to a food processing technology, and discloses a stress relaxation microchannel guided low-fat high-oxidation-stability nut preparation method. The method comprises the following steps: adjusting the content of nut meat in an aqueous solution containing an antioxidant to 8-12% (dry basis), and then carrying out phase change induced stress treatment to form a micro-fracture network communicated with the outer surface in the interior; then increasing the pressure to 3 to 10 MPa at the speed of 1.0 to 2.5 MPa / min, and maintaining the pressure, wherein the hot / trap is 1.5 to 1.8; and rapidly relieving pressure and discharging residual oil at (2.5-3.5) v1, and rapidly shaping by adopting high-energy drying for 2-10 minutes by adopting radio frequency / infrared / microwave vacuum and the like. According to the method, the degreasing efficiency and the size stabilization rate are improved under the low pressure intensity, surface residual oil is reduced, flavoring is promoted, and the storage oxidation stability is improved.

This invention discloses a large-area photo-chargeable aqueous zinc-ion battery, its preparation method, and its application. The method includes the following steps: Two pieces of glass with a transparent conductive layer coated on one side are taken. A positive electrode material is placed on the coated layer of one of the glass pieces. A glass fiber separator and a negative electrode material are sequentially covered on top of the positive electrode material. The other glass piece is then placed on top of the negative electrode material with its coated layer facing down. The positions of the two glass pieces are adjusted so that they are stacked alternately. Pressure is applied to the resulting stacked structure, and three sides are sealed with hot melt adhesive. After the hot melt adhesive has cured, electrolyte is injected into the unsealed side, and then this side is sealed again. The negative electrode of a diode is connected to the glass on the positive electrode side of the battery, and the positive electrode of the diode is connected to the glass on the negative electrode side of the battery, thus obtaining a large-area photo-chargeable aqueous zinc-ion battery. The battery of this invention has the advantages of high light utilization, stable charging, and low loss.

This invention discloses a method for preparing high-entropy ceramic matrix composites using a reactive infiltration process, belonging to the technical field of ceramic matrix composites. The steps are as follows: at least four single-component carbides are ball-milled and mixed with a carbon source, then dispersed in a dispersion liquid to obtain a slurry; continuous fibers are woven into a preform, and an interface layer and a matrix layer are deposited to obtain a semi-dense composite material; the slurry is introduced through vacuum or pressure impregnation; and a high-entropy carbide matrix is ​​generated in situ and densified by reactive infiltration after embedding with a transition metal and its alloy. This invention solves the problems of long process cycles, high porosity, high cost, and insufficient introduction of high-entropy ceramics in existing processes, achieving rapid densification and improving the material's high-temperature stability, oxidation resistance, and ablation resistance. It is suitable for the large-scale production of thermal protection materials for hypersonic vehicles.

The invention discloses a fire extinguishing agent special for forest and grassland in the technical field of fire extinguishing agents for forest and grassland. The fire extinguishing agent comprises the following components in parts by weight: 2-3.5 parts of a surfactant, 60-75 parts of a high-concentration flame retardant, 1-2 parts of a high-strength penetrant, 0.5-1.0 part of a composite thickener, 3-5 parts of a stabilizer, 0.5-1 part of a crosslinking aid, 2-4 parts of a hydrophobic component, 1-2 parts of an anti-blocking agent and 15-20 parts of deionized water. According to the fire extinguishing agent special for the forest grassland, the added high-strength penetrating agent and the added composite thickening agent can be attached to the periphery of the grassland, so that the fire extinguishing agent is not prone to being blown away by air waves or strong wind formed by big fire, the fire extinguishing agent can directly reach the root of a fire source, the fire extinguishing speed and efficiency are improved, the using amount of the fire extinguishing agent is reduced, and the fire extinguishing cost is reduced; and ammonium dihydrogen phosphate is added as a flame retardant, so that re-combustion of a forest fire can be effectively prevented, or the re-combustion time of the forest fire can be remarkably prolonged, and more time is provided for manually cleaning a fire scene to ensure that the forest fire is completely extinguished.

The invention discloses a steel ball grinding iron mud draining treatment device, and belongs to the technical field of steel ball grinding, the iron mud draining treatment device comprises a draining box, a ground rail truss vehicle is erected outside the draining box, a plurality of supporting frames are arranged in the draining box at equal intervals, sieve plates are laid on the supporting frames, the draining box is divided into an upper cavity and a lower cavity through the sieve plates, and the upper cavity and the lower cavity are communicated with each other. Wherein the upper cavity is a balling pool, the lower cavity is a filtrate placing pool, a plurality of extrusion cones are uniformly arranged on the sieve plate, flow guide grooves are circumferentially formed in the surfaces of the extrusion cones, and the tips of the extrusion cones are polished into spherical structures. The extrusion cone is arranged on the sieve plate, when a cloth bag containing iron mud is placed on the sieve plate, the extrusion cone abuts against the bottom of the cloth bag to enable the cloth bag to be suspended, the cloth bag is prevented from being tightly attached to the sieve plate, grinding liquid can permeate to the outside of the cloth more quickly, and meanwhile the flow guide grooves in the surface of the extrusion cone utilize the capillary effect and gravity to create a drainage channel; concentrated outflow of water is accelerated, and the draining efficiency is further improved.

The application provides a pore-forming agent for lithium ion batteries and a preparation method thereof, which comprises a wall material preparation step, a core material preparation step, a W / O type initial milk preparation step and a pore-forming agent for lithium ion batteries preparation step. The pore-forming agent preparation method is a new pore-forming agent synthesis route, which has the advantages of simple reaction steps, mild reaction conditions, high yield, low cost and environmental protection. The technology can accurately construct a uniform multi-level pore network by introducing the pore-forming agent into the electrode, significantly reduces the charge transmission impedance, effectively improves the fast charging capacity and high-rate discharge performance of the battery, greatly improves the electrode-electrolyte interface contact, and ensures the full use of the active material. The application also provides an application of the pore-forming agent for lithium ion batteries to lithium ion batteries. The application of the pore-forming agent for lithium ion batteries to the lithium ion batteries can improve ion conduction and improve the rate performance.

The application discloses a pesticide synergist and a preparation method thereof. The pesticide synergist comprises a silanol-initiated polyether shown in formula I, an inositol phosphate-initiated polyether shown in formula II, an alcohol auxiliary agent and water. The silanol-initiated polyether shown in formula I and the inositol phosphate-initiated polyether shown in formula II are synergized, so that the adhesion, spreading, penetration and retention capacity of pesticide droplets on a target surface are significantly enhanced, and the utilization rate of the pesticide is effectively improved. The product has the advantages of low toxicity, environmental friendliness, multi-functional synergism, wide compatibility and the like, the preparation process is simple and stable, and the product is suitable for industrial production.

The utility model relates to the technical field of bricks, and particularly discloses a low-carbon environment-friendly self-cleaning brick which comprises a brick body, a photocatalytic film layer, a biochar layer and a water permeable layer are respectively arranged on the top surface of the brick body, a waterproof layer is arranged on the bottom surface of the brick body, the photocatalytic film layer is made of titanium dioxide, the biochar layer is made of biochar, and the water permeable layer is made of water. According to the low-carbon environment-friendly self-cleaning brick, the photocatalytic film layer, the biochar layer and the water permeable layer are arranged on the top face of the brick body, harmful gas in air can be effectively decomposed, pollutants can be strongly adsorbed, rainwater can be promoted to permeate rapidly, and therefore the low-carbon environment-friendly self-cleaning brick has the advantages of being environmentally friendly, environmentally friendly and capable of being recycled. And the waterproof layer arranged on the bottom surface of the brick body effectively prevents water in the brick body from leaking to the outside of the brick body, so that damages such as corrosion, deformation and the like of a building structure caused by accumulated water erosion are reduced, the durability is improved, and the practicability is high.

The invention discloses a color fixing device for polyester fabric processing and a color fixing method thereof. The color fixing device comprises an ageing box, and an ageing device is mounted at the bottom of an inner cavity of the ageing box; the opening mechanism is arranged below the two sides of an inner cavity of the steaming box, and two guide wheels are mounted on one side of the interior of the opening mechanism; the lifting plate is arranged above the opening mechanism, positioning wheels corresponding to the guide wheels in position are arranged below the lifting plate, and a reciprocating lifting plate is fixedly installed at the lower end of the outer portion of the connecting arm; the transmission box is arranged on one side of the ageing box, a transmission assembly is arranged in the transmission box, the transmission assembly drives a reciprocating lifting plate to descend so that guide wheels and positioning wheels can pull the two sides of the polyester fabric, the transmission assembly drives the reciprocating lifting plate to ascend, and the polyester fabric is moved through an intermittent conveying mechanism; the color fixing device solves the problem of how to improve the color fixing effect of the fabric on the premise of ensuring the processing efficiency of the polyester fabric.

This utility model provides a recyclable, biodegradable, and environmentally friendly ink-absorbing needle-punched nonwoven fabric, relating to the field of nonwoven fabric technology. It includes: a nonwoven fabric body; the nonwoven fabric body has a three-layer composite structure, with an upper dense surface layer and a lower dense surface layer, and a middle loose support skeleton. Both the upper and lower dense surface layers are composed of fibers with a diameter of 2 micrometers. A nanofiber cellulose film with a thickness of 8 micrometers is laminated to the surface of the nonwoven fabric body. The nonwoven fabric body has a three-layer composite structure, with upper and lower polylactic acid dense layers (2 micrometers in diameter, each accounting for 20% of the total thickness) controlling ink diffusion and improving strength, and a middle loose support skeleton (6 micrometers in diameter, accounting for 60%, with a porosity of 75%) storing and penetrating ink. The three-dimensional structure is formed by needle punching at 200 needles / cm². The film contains 3% titanium dioxide for UV resistance. Both polylactic acid and nanofiber cellulose are biodegradable materials, suitable for printing, medical, and packaging fields, balancing environmental friendliness, printing performance, and functionality.

The utility model relates to a shiitake mushroom stick pressurizing and water replenishing device, and belongs to the technical field of edible mushroom processing. Comprising a high-strength support, a water supplementing tank of a box body structure is fixedly installed on the top face of the high-strength support, two circular feeding covers are symmetrically hinged to the top of the water supplementing tank, a water outlet pipe is arranged at the bottom of the water supplementing tank, and two pressurizing mechanisms are further erected in front of the high-strength support; the pressurizing mechanism is communicated and connected with the interior of the water supplementing tank, two sets of water adding mechanisms are erected behind the high-strength support, a storage net is further erected in an inner cavity of the water supplementing tank in the horizontal direction, and an ultrasonic oscillator is installed at the bottom of the storage net.

The application provides a medical three-dimensional nanofiber composite sponge as well as a preparation method and application thereof, and relates to the technical field of medical fiber sponges. The medical three-dimensional nanofiber composite sponge is mainly composed of three-dimensional nanofibers prepared by gelatin, polylactic acid and genipin crosslinking, and cuttlebone particles attached to the nanofibers. The medical three-dimensional nanofiber composite sponge has a three-dimensional fluffy sponge structure with high porosity, overcomes the poor permeability of traditional electrostatic spinning two-dimensional membranes, is beneficial to rapid blood permeation and coagulation factor enrichment, and simultaneously combines the active coagulation-promoting ability of calcium ion release and chitin of the cuttlebone particles and the rapid liquid absorption and concentration effect of the gelatin, realizes rapid hemostasis after high-pressure bleeding, and can meet the first-aid requirements of high-risk bleeding scenes such as high-pressure pulsatile bleeding. In addition, the medical three-dimensional nanofiber composite sponge has excellent biological safety and healing-promoting function, and the degradation rate and the wound healing period can be well matched.

The utility model relates to the technical field of spice flushing, disclose a kind of flushing device of spice production, including water tank, the water tank top is provided with flushing tank, the water tank top is provided with vibration subassembly, the water tank outer wall is fixedly connected with fixed frame, the fixed frame outer wall is provided with swing subassembly, the water tank outer wall is fixedly connected with water pump, the water pump output end is fixedly connected with water pipe, the other end of water pipe is fixedly connected with connecting pipe, the connecting pipe outer wall is fixedly connected with spray head, the swing subassembly includes swing lever, the swing lever outer wall is arranged in the fixed frame outer wall, the fixed frame outer wall is fixedly connected with fixed plate, in the utility model, through swing lever drive connecting pipe reciprocating rotation, then through connecting pipe drive spray head swing, avoid the flushing range of traditional fixed spray head to be limited to single angle, prone to form cleaning blind area in equipment inner wall, container corner or raw material gap, cause local impurity residue.

The invention discloses a method for rapidly moistening and puffing tobacco stems and application. The method comprises the following steps: 1) preparing stem washing water by using ammonium carbonate and water; 2) washing stems by using the prepared stem washing water; (3) steaming the washed tobacco stems by using a high-pressure stem steaming machine, and maintaining the pressure for a certain time; (4) after the pressure maintaining time is over, continuously heating and boosting the stem steaming machine, and maintaining the pressure for a certain time again; (5) after the secondary pressure maintaining is finished, the high-pressure stem steaming machine is subjected to rapid pressure relief; and (6) after pressure relief is finished, the steamed tobacco stems are taken out. High-pressure stem steaming is conducted after the tobacco stems are washed with water, moisture can permeate into the tobacco stems rapidly, the tobacco stem moistening time is shortened, meanwhile, stem washing water containing ammonium carbonate is prepared for stem washing, ammonium carbonate is decomposed at high temperature after permeating into the tobacco stems, a large amount of gas is generated, the gas is rapidly discharged from the tobacco stems in the rapid pressure relief process, and the tobacco stems are washed completely. And the tobacco stems are properly puffed, so that the subsequent preparation and processing of the cut stems are facilitated. Compared with the method for manufacturing the tobacco stem shreds, the method for manufacturing the tobacco stem shreds can shorten the time by 3-5 hours, and the production efficiency is improved.

The utility model discloses a waste bamboo wood sterilizing and smashing processing device which comprises a smashing mechanism, a sterilizing mechanism is arranged on one side of the smashing mechanism, a conveying mechanism is arranged between the smashing mechanism and the sterilizing mechanism, the smashing mechanism comprises a supporting table, a smashing bin, a double-roller smashing machine and a discharging port, the smashing bin is fixedly arranged at the upper end of the supporting table, and the discharging port is fixedly arranged at the lower end of the supporting table. And a double-roller crusher is fixedly arranged at the lower end of the crushing bin. According to the utility model, the crushing process is added before the sterilization process, so that bamboo wood can be crushed and then is subjected to steam sterilization and cooking more conveniently, the particle size is greatly reduced after the bamboo wood is crushed, steam can permeate into the bamboo wood more quickly and uniformly, each part is ensured to be in full contact with high-temperature steam, and the quality of the bamboo wood is improved. And internal bacteria, molds and microorganisms are effectively killed. And compared with large bamboo materials, the surface area of crushed particles is increased, steam contact is more sufficient, and the sterilization efficiency is remarkably improved.

The application discloses a high-strength anti-aging rubber sealing ring and a preparation method thereof, and belongs to the technical field of sealing rings. The self-synthesized expanded dispersion filler is used as a reinforcing phase to endow the rubber sealing ring with excellent mechanical properties. The expanded dispersion filler has a core-shell structure, the core layer is expanded graphite, and the shell layer is brush-shaped silicon dioxide. The composite structure can disperse stress by generating relative slip, the brush-shaped silicon dioxide can physically block oxygen and heat, reduces the penetration of oxygen into the rubber interior under high temperature, and delays the oxidation and rupture of rubber molecular chains. When the high-strength anti-aging rubber sealing ring is used in a high-temperature scene, the expanded dispersion filler can expand, the expansion effect can fill the tiny cracks and pores of the rubber matrix caused by thermal expansion and cold shrinkage, and the penetration of oxygen and heat aging factors into the rubber interior is reduced.

The invention discloses a processing device for moisture-absorbing antibacterial fabric surface processing and a using method thereof, and particularly relates to the technical field of fabric processing equipment.The processing device comprises a workbench, and a transmission mechanism is arranged on the side, away from a transmission roller set, of the outer surface of a supporting plate located on one side; a spraying mechanism is arranged on the side, away from the transmission mechanism, of the upper end of the workbench, two cleaning mechanisms are arranged on the sides, close to each other, of the outer surfaces of the two supporting plates, and a sweeping device is arranged on the sides, close to each other, of the two cleaning mechanisms. According to the processing device for processing the surface of the moisture-absorbing antibacterial fabric, the transmission mechanism drives the cleaning mechanism to reciprocate through the transmission handle and the driven mechanism, so that the cleaning mechanism cleans the surface of the cleaning roller, cotton fibers are prevented from being attached to the surface of the cleaning roller, and the cleaning work of the cleaning roller on the fabric is not influenced; and the stability of the device is improved.

The application discloses a kind of battery separators of chitosan aerogel microspheres and CNF composite and preparation method thereof, belong to lithium ion battery technical field.The battery separator includes polyolefin porous base film and the coating layer of at least one side surface of the base film;The coating layer is formed by coating and drying by coating slurry including chitosan aerogel microspheres and CNF;The chitosan aerogel microspheres are porous particles formed after chitosan is crosslinked, freeze-dried and crushed.The application constructs light, multistage pore structure coating layer by chitosan aerogel microspheres and CNF composite, significantly improves the wettability of electrolyte, liquid absorption rate and liquid retention rate of separator under the premise of extremely low weight gain, and has good thermal stability, effectively solves the contradiction that traditional ceramic coating weight and wettability cannot be compatible.

The present invention is applicable to the technical field of geotechnical specimen testing, and provides a vacuum saturation device, which includes: an upper cavity, the bottom of which is an open structure and the upper part of which is provided with a first valve; a lower saturation cylinder, the top of which is an open structure and the second valve; a partition, which is detachably placed between the upper cavity and the lower saturation cylinder, and is provided with a through hole; a support base, which is a hollow structure inside, a filter structure is provided on the top, and the support base is sealed and connected with the through hole for the installation of the specimen; wherein, airless water is injected into the interior of the upper cavity and overflows the top of the saturator, and the interior of the upper cavity is pressurized through the first valve; the interior of the lower saturation cylinder is evacuated through the second valve to form a negative pressure state of 0.1Mpa, and the airless water penetrates the specimen inside the saturator through the pressure difference between the upper cavity and the lower saturation cylinder, so that the specimen is saturated. The present invention has the advantages of simple structure, convenient operation, and high saturation.

This invention relates to the field of nonwoven fabric technology, and in particular to an antibacterial, anti-backflow, and easily permeable ES fiber hot-air nonwoven fabric. The ES fiber has a core-sheath composite structure, including a sheath layer and a core layer. The sheath layer uses hydrophobic PE as the matrix and, by mass percentage of the hydrophobic PE matrix, includes the following components: 0.5-1% antibacterial agent, 2-3% dispersant, 0.2-0.3% antioxidant, and 1-10% hydrophilic PE masterbatch. The mass ratio of the sheath layer to the core layer is 4-5:5-6. The core layer is made of PET or PP. The advantage of this invention is that by optimizing the sheath-core ratio, the amount of additives, and the process parameters, the ES fiber hot-air nonwoven fabric simultaneously meets the requirements of rapid permeation, anti-backflow, long-lasting antibacterial effect, softness and skin-friendliness, and structural strength. It breaks through the performance bottleneck of traditional sanitary product surface layers, which are characterized by "hydrophilicity leading to easy backflow, hydrophobicity leading to slow permeation, and short-lasting antibacterial effect," and solves the defects of existing materials with single functions.

The invention relates to the technical field of oilfield sewage treatment, and particularly discloses a composite water clarifier for oilfield sewage treatment and a preparation method of the composite water clarifier. The invention relates to a composite water clarifier for oilfield sewage treatment. The composite water clarifier is prepared from the following raw materials: dual modified polyacrylamide, an imidazoline quaternary ammonium salt grafted copolymer, a scale inhibitor, an adsorbent, dodecyl dimethyl betaine, a coagulant aid and deionized water, the double modified polyacrylamide is obtained by performing double modification on polyacrylamide by using 2, 3-epoxypropyl trimethyl ammonium chloride and a hydrophobic monomer; the imidazoline quaternary ammonium salt grafted copolymer is a grafted copolymer of imidazoline quaternary ammonium salt, acrylamide and acrylamide-2-methylpropanesulfonic acid. The composite water clarifier can be used for treating high-salt and high-oil sewage generated in the middle and later periods of oilfield exploitation, has the advantages of being high in salt resistance, thorough in demulsification and good in flocculation effect, can efficiently remove oil and suspended solids, ensures that effluent reaches the standard, and meets the complex sewage treatment requirements of an oilfield.

The invention discloses a biomass graphene production device and process, including a gasifier, a first cyclone dust collector, a first heating interlayer, a gas-liquid separator, a catalytic adsorption purifier, a flushing liquid ejector and a flushing gas storage tank connected in sequence, a negative pressure spiral low temperature pyrolysis purifier and a negative pressure spiral high temperature pyrolysis carbonization machine are respectively connected to the gas outlet of the flushing gas storage tank, and the negative pressure spiral low temperature pyrolysis purifier and the negative pressure spiral high temperature pyrolysis carbonization machine are respectively connected to the high temperature tail gas inlet of the heat exchanger, and a spray dryer is connected to the hot air outlet of the heat exchanger; the first heating interlayer is arranged on the spiral dryer, and the spiral dryer, the negative pressure spiral low temperature pyrolysis purifier, the negative pressure spiral high temperature pyrolysis carbonization machine, the graphite crusher, the negative pressure cavitation permeation tank, the high pressure puffing stripping machine, the stripping suspension storage tank, the delivery pump, the spray dryer and the cyclone collector are connected in sequence. The invention improves the energy utilization rate and yield when producing graphene.

The invention discloses a method for preparing MXene through fluoride-free alkali etching of an ultrasonic-assisted supercritical fluid technology, and relates to the field of MXene preparation.Fluorine-free green preparation of MXene is achieved through cooperation of supercritical carbon dioxide fluid and a high-frequency power ultrasonic technology and a fluoride-free etching agent. The preparation method comprises the following steps: introducing carbon dioxide to reach a supercritical state, carrying out an etching reaction in the supercritical state by adopting a stirring or fluid circulation mode, applying continuous or discontinuous high-frequency power ultrasonic treatment to the whole reaction system, recovering to normal pressure and normal temperature after the reaction is finished, collecting a product, washing and drying, thereby obtaining the high-purity silicon dioxide. The high-frequency vibration of the ultrasonic waves and the high diffusivity of the supercritical carbon dioxide are utilized to promote the etching agent to remove A-layer elements in the MAX phase, so that the use of a fluorine-containing etching agent is avoided, the environmental pollution is reduced, and the etching efficiency of the MAX phase is also remarkably improved.

This utility model provides a refrigeration device, including a cabinet, a cabinet liner, and a door. The door includes a door shell, a decorative element, and a sealing element. The door shell includes a door panel and door side panels that bend and extend from the side edge of the door panel toward the lower side of the door panel. Multiple door side panels are arranged circumferentially around the door panel. The door panel and the multiple door side panels enclose a foamed space. A notch area is formed between two adjacent door side panels. The sealing element is located inside the notch area and covers the notch area. A snap-fit ​​cavity isolated from the foamed space is recessed on the outer wall of the sealing element. The decorative element is located outside the notch area and covers the notch area. The outer wall of the sealing element is provided with a first sealing wall and a second sealing wall. The first sealing wall is sealed and fitted to the inner wall of the door side panel on one side of the notch area, and the second sealing wall is sealed and fitted to the inner wall of the door side panel on the other side of the notch area. The refrigeration device of this application achieves reduced door cost while having a good sealing effect.