121results about How to "Guaranteed decentralization" patented technology

The invention relates to the technical field of surfactants, and discloses a preparation method of a modified polycarboxylate surfactant and application of the modified polycarboxylate surfactant in pesticide preparations. 3-hexene-1, 6-diamine and epoxy chloropropane are used as raw materials, 1, 6-tetraglycidylamine-3-hexene is obtained through ring-opening and ring-closing reactions, 1, 6-tetraglycidylamine-3-hexene is utilized twice, and the yield of the 1, 6-tetraglycidylamine-3-hexene is increased. The preparation method comprises the following steps: sequentially reacting 2, 3, 4, 6-tetraglycidylamine-3-hexene with sodium hydrogen sulfite and phosphoric acid to obtain tetrasulfonate hexene and tetraphosphate hexene, and copolymerizing the tetrasulfonate hexene and the tetraphosphate hexene with acrylic acid and methacrylate to obtain the modified polycarboxylate surfactant. The modified polycarboxylate surfactant prepared by the preparation method disclosed by the invention has excellent dispersing performance, heat storage stability and relatively high suspension rate.

The invention discloses cool polyurethane synthetic leather as well as a preparation method and application thereof. The synthetic leather is sequentially composed of a cool polyurethane surface layer, a polyurethane thermal insulation layer, a polyurethane foaming bonding layer and a base material layer from top to bottom, wherein the cool polyurethane surface layer is prepared from the following components in parts by weight: 100 parts of polyurethane resin, 2-4 parts of a wear-resistant additive, 1-2 parts of a curing agent and 1-5 parts of cool color paste; the cool color paste is prepared by mixing 1-10 parts of a microcapsule phase change material, 2-10 parts of an infrared reflection pigment and 40-60 parts of water; the polyurethane heat insulation layer comprises polyurethane resin and hollow silicon dioxide modified by a silane coupling agent. The infrared reflection pigment and the microcapsule phase change material in the cool polyurethane surface layer reduce the surface temperature of the polyurethane synthetic leather. Meanwhile, a heat insulation material in the polyurethane heat insulation layer and a foaming process of the polyurethane foaming bonding layer are combined, so that the cool-feeling polyurethane synthetic leather material which is slowly heated at high temperature in summer is prepared.

The invention is suitable for the technical field of conductive slurry preparation, and provides a conductive slurry grinding device which comprises a grinding base assembly, the grinding base assembly comprises a horizontally-arranged base, and a motor bin and a supporting arc plate are installed at the top of the base; a grinding driving assembly is arranged in the motor bin, a grinding assembly is connected to the side wall of the side, close to the supporting arc plate, of the motor bin, and feeding and discharging assemblies are arranged at the two ends of the grinding assembly. And the grinding driving assembly comprises a grinding motor which is horizontally arranged. The device solves the problems that the grinding quality and efficiency are affected due to agglomeration of conductive paste carbon nanotube powder particles during grinding, and the grinding device cannot treat conductive paste with different finenesses, and achieves the purpose that the grinding quality and efficiency are improved by improving the feeding uniformity degree and matching premixing treatment before grinding. The probability of agglomeration caused by overlarge specific surface area of carbon nanotube powder particles is reduced, and meanwhile, the distance between the grinding discs is adjusted during grinding, so that the cycle time required for grinding the conductive slurry is shortened.

The invention discloses a near-infrared light response ultrathin nanosheet sulfur-doped BiOCl photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following technical steps: (1) preparing a BiOCl nanosheet; and (2) preparing the sulfur-doped BiOCl nanosheet. By adopting a secondary hydrothermal method and controlling the dosage of thioacetamide and BiOCl nanosheets, the prepared catalyst is an ultrathin nanosheet with uniform morphology, the average size is 70-120nm, the catalyst has light response in a near-infrared light region of 780-1200nm, the light absorption capacity of the catalyst is better, and near-infrared light response can be achieved. The catalyst is applied to catalytic degradation of ENR, the ENR degradation rate under visible light is 66.87%, and the degradation effect is good; under near-infrared light, the ENR degradation rate is 9.25%, and the degradation performance from zero to existence is achieved. The preparation method disclosed by the invention is simple, mild in condition, easy to control, low in raw material consumption, free of complex operations such as centrifugation, low in preparation cost and easy to popularize and apply.

The invention relates to the technical field of photovoltaic modules, in particular to an EPE packaging adhesive film, a preparation method of the EPE packaging adhesive film and a photovoltaic module. The EPE packaging adhesive film comprises a first EVA layer, a POE layer and a second EVA layer which are arranged in sequence, the first EVA layer and the second EVA layer respectively and independently comprise EVA resin, functional particles, a sulfydryl-containing silane coupling agent, a cross-linking agent, an assistant cross-linking agent, an antioxidant and a light stabilizer; the POE layer comprises POE resin, functional master batch, triethylamine, a cross-linking agent, an assistant cross-linking agent, an antioxidant and a light stabilizer; the functional particles comprise white carbon black, magnesium hydroxide and a sulfydryl-containing silane coupling agent according to the mass ratio of 1: (0.8 to 1.2): (0.002 to 0.1). After the EPE packaging adhesive film is applied to the photovoltaic module, the long-term reliability of the photovoltaic module can be effectively improved, and the service life of the photovoltaic module can be effectively prolonged.

The invention provides alpha-aluminum oxide powder and a preparation method, and belongs to the field of inorganic nonmetals. The method comprises the following steps: mixing an aluminum oxide precursor, a steric hindrance agent and a solvent to obtain mixed slurry; sanding the mixed slurry to obtain superfine slurry; carrying out spray drying on the superfine slurry to obtain superfine powder; mixing the ultrafine powder and a grain inducer to obtain a roasting precursor; and roasting the roasting precursor under set roasting conditions to obtain the alpha-aluminum oxide powder. Firstly, a steric hindrance agent is added into an aluminum oxide precursor, so that steric hindrance is formed in emulsification and dispersion processes, and agglomeration of powder is inhibited; secondly, through sanding, dispersity and uniformity of raw material particles are guaranteed; thirdly, a seed crystal inducer is added into the superfine powder, so that superfine particles can be formed through induction, and the conversion temperature can be reduced. Therefore, the alpha conversion rate of the alpha-aluminum oxide is improved, and the dispersion stability of the alpha-aluminum oxide is improved.

The invention discloses water treatment equipment and method based on MS glue production, and relates to the technical field of wastewater treatment.The water treatment equipment comprises a machine body, a plurality of flocculation tanks arranged in the machine body and a plurality of column feet installed at the bottom of the machine body, and further comprises a batch injection mechanism and a water treatment mechanism, a water inlet pipe and a dosing pipe are sequentially mounted in the fixed plate along an annular track; the multi-stage flocculation mechanism comprises a main shaft rotationally connected to the interior of the flocculation tank, a plurality of stirring assemblies mounted outside the main shaft and an adjusting assembly mounted in the main shaft; the blades are adjusted to be in an inclined state, so that wastewater and a flocculating agent can be rapidly mixed, in a flocculating constituent growth stage, the blades are adjusted to be in a vertical state, and the wastewater is stirred at a low speed through the combined blades, so that shearing of the flocculating constituent can be avoided, dispersion of the flocculating agent in the wastewater can be kept, and growth of the flocculating constituent in the wastewater can be promoted.

The invention discloses propylene mark pen ink and a preparation method thereof, and relates to the technical field of pen ink, the propylene mark pen ink comprises the following raw materials by weight: 10-20 parts of an MOF modified acrylic resin emulsion, 15-40 parts of a pigment, 1-3 parts of a leveling agent, 2-4 parts of a humectant, and 50-160 parts of deionized water; the MOF modified acrylic resin emulsion comprises the following raw materials: acrylic acid and a vinyl MOF material, wherein the mass ratio of the acrylic acid to the vinyl MOF material is (3-5): 1. The vinyl MOF material is added in the preparation of the acrylic resin emulsion, so that a small part of the MOF material can be connected into a long chain of the acrylic resin, and due to the porous adsorption characteristic of the MOF material, the adsorption performance of the acrylic resin emulsion on pigments can be improved after the ink is dried, so that ink marks can be stored for a relatively long time and are prevented from falling off or fading.

The present invention provides a fermentation tank for antibiotic-free aquaculture feed, which belongs to the field of antibiotic-free aquaculture technology. It solves the problem that the existing fermentation tank cannot ferment in layers, resulting in uneven fermentation in the tank, large differences in bacterial growth, and affecting the quality of feed fermentation. A fermentation tank for antibiotic-free aquaculture feed, including a bracket and a temperature-controlled tank fixed on the surface of the bracket, and a fermentation tank is rotatably arranged inside the temperature-controlled tank. In the present invention, by rotatably arranging the fermentation tank inside the temperature-controlled tank, under the action of the temperature-controlled tank forming two upper and lower chambers, by arranging a fixed plate at the bottom of the fermentation tank, the interior of the fermentation tank is divided into upper and lower parts, and circulation is carried out through the through holes, which is convenient for isolating the interior of the fermentation tank. Under the action of the temperature-controlled tank, the problem of excessive fermentation of materials at the bottom of the fermentation tank is avoided, and the problem of large differences in bacterial flora inside the fermentation tank can be prevented. It is also beneficial to improve the fermentation efficiency of the feed and shorten the production cycle.

The invention provides a nano sizing agent reinforced quartz fiber cloth composite material and a preparation method thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: shearing and dispersing a surfactant, a solvent and nano hydrophobic particles to obtain a nano sizing emulsion; depositing the nano sizing emulsion on the surface of the quartz fiber cloth by using an aerosol deposition method; and finally, carrying out hot press molding on the modified quartz fiber cloth and a resin matrix to obtain the composite material. The hydrophobic property of the modified quartz fiber cloth obtained by the method is improved, and the contact angle between the modified quartz fiber cloth and water drops can reach 161.5 degrees; according to the composite material obtained by modifying the quartz fiber cloth, the interface bonding force of resin and fibers is strong, the mechanical property of the composite material is remarkably improved, and a tensile strength test shows that the flexibility of the composite material is also remarkably improved, and the composite material is not easy to break during stretching and has good mechanical property.

The invention discloses modified calcium carbonate applied to filling of an HDPE (high-density polyethylene) pressure-bearing pipeline, and relates to the technical field of calcium carbonate powder modification, and the modified calcium carbonate is prepared from the following components in parts by mass: 100 parts of calcium carbonate, 1.5-2.0 parts of a modifier, 0.25-0.35 part of a dispersing agent, 0.2-0.4 part of an antioxidant and 0.1-0.15 part of Caster 2, the modifier is one of dimethyl methoxy silane terminated telechelic polybutadiene, a polyethylene-b-polyethylene glycol block copolymer and polysiloxane with a side chain containing an epoxy group. The HDPE pressure-bearing pipeline filling material is good in dispersity, compatibility and binding force, high-proportion filling can be achieved in HDPE pressure-bearing pipeline production, the mechanical property and aging resistance of a pipeline can be improved, the hydrostatic strength is guaranteed, and the cost of the pressure-bearing pipeline is reduced.

The invention relates to the technical field of carbon capture, and discloses a device for absorbing carbon dioxide and application thereof. The device is characterized by comprising a reaction absorption tower (4), a flue gas conveying pipeline (5), a circulating pipeline (8) and a micro-channel device (10), wherein a partition plate (9) is arranged in the reaction absorption tower (4), and the reaction absorption tower is divided into a reaction cavity (2) and a circulation cavity (15) by the partition plate; wherein a disperser (3) is arranged in the reaction absorption tower (4); wherein the microchannel device (10) is provided with a sudden expander (16). When the device is used for absorbing carbon dioxide, the effect of improving the carbon dioxide removal rate can be achieved.

The invention relates to the technical field of battery packs, and discloses a bottom protection structure for a battery pack and the battery pack, the bottom protection structure for the battery pack comprises a liquid cooling plate, a bottom protection plate and a buffer layer; the bottom of the liquid cooling plate comprises a non-flow channel area and a protruding flow channel area; the bottom protection plate is arranged at the bottom of the liquid cooling plate, and the bottom protection plate and the liquid cooling plate are arranged at intervals; the buffer layer is arranged between the liquid cooling plate and the bottom protection plate, and the bottom of the buffer layer abuts against the bottom protection plate; in the flow channel area, the top of the buffer layer abuts against the liquid cooling plate; according to the present invention, the impact force can be effectively absorbed and dispersed when the different regions of the battery pack are impacted so as to ensure that the battery cells in the battery pack are not extruded when the battery pack is subjected to the external force effect, such that the battery pack can be prevented from being damaged, and the battery pack is prevented from being damaged. And the protection level of the battery cells in the battery pack is improved, and the overall safety of the battery pack is ensured.

The invention relates to a method for filling a polymerization reaction stabilizer. The method comprises the following steps: conveying an antistatic agent into a dilution container; delivering a diluent into a dilution container; in a dilution container, an antistatic agent and a diluent are mixed, and a mixed solution is obtained; and conveying the mixed solution into a polymerization reaction vessel.

The utility model relates to the field of latex paint production, in particular to a high-speed stirring type latex paint dispersing device. The utility model provides a high-speed stirring type latex paint dispersing device which comprises a base, an integrated controller and an electric telescopic rod, the integrated controller is fixedly installed on the base, a separable barrel body which is matched with and stores latex paint raw materials is arranged on the base, and the electric telescopic rod electrically connected with the integrated controller is fixedly installed on the base. The device further comprises a connecting block and the like, and the connecting block is fixedly installed on a movable rod of the electric telescopic rod. According to the emulsion paint dispersing device, the plurality of spiral stirring rods are arranged on the sealing cover, and the stirring rods are driven by the gear set to longitudinally stir emulsion paint raw materials in the barrel body from bottom to top at the same time, so that resin emulsion and water in the barrel body can be fully stirred and mixed, and the dispersing effect of the emulsion paint raw materials is improved; and the production quality of the latex paint is further guaranteed.

The present application relates to the technical field of shale gas sampling, in particular to a shale gas exploitation sampling device and method, the device comprises a box body and an inspection door, a filter box is arranged in the upper middle part of the box body, a low-temperature box is arranged in the lower middle part of the box body, an adsorption box is arranged in one end of the box body, a shunt pipe is arranged on the inner wall of the bottom end of the low-temperature box, a cooling mechanism for low-temperature water removal is arranged in the low-temperature box, a filtering mechanism for automatic filtering and automatic cleaning is arranged in the filter box, an adsorption mechanism for adsorption is arranged in the adsorption box, and a connecting mechanism for connecting a sampling pipeline is arranged in one end of the box body. The device can be suitable for sampling pipelines of different sizes and shapes, can ensure the firmness and sealing property of the connection, can automatically sample and purify different shale gases comprehensively, and can ensure the accuracy and sufficient amount of sampling.

The invention discloses a glass lining feeding, temperature measuring and baffling integrated multifunctional pipe, and belongs to the technical field of chemical engineering. According to the structure of the pipeline, an outer sleeve is arranged on the outer side of a pipe body, a liquid pump is installed in the outer sleeve, the input end of the liquid pump is connected with a feeding pipe, the output end of the liquid pump is connected with a flow guide pipe, the flow guide pipe is connected with a plurality of input pipes, filter elements are installed in the input pipes, installation grooves are located in the outer sleeve, and spray heads are arranged at the ends of the input pipes. A temperature measuring probe is arranged on the inner side of the pipe body, a hole channel is formed between the pipe body and the outer sleeve, a valve is arranged in the hole channel, the spray head is located on the inner side of the valve, and an electric heating pipe is arranged outside the pipe body. The material supplementing unit is additionally arranged outside the glass lining pipeline, multi-point material supplementing can be carried out in a spraying mode, the material supplementing function is achieved, and meanwhile the dispersity of material liquid in the initial stage is guaranteed. Meanwhile, the temperature measuring module and the baffling structure are introduced, and the function of the glass-lined pipeline is fully expanded.

The invention discloses SiBCN ceramic slurry for direct-writing type 3D printing as well as a preparation method and a printing method of the SiBCN ceramic slurry, and belongs to the field of ceramic additive manufacturing. The invention aims to solve the problem of non-uniform selection and dispersion of SiBCN precursor filler in existing direct writing printing. And the slurry is prepared from cured polyborosilazane (PBSZ) powder, an inorganic rheological additive, a rheological synergist and a polyborosilazane (PBSZ) liquid. The preparation method comprises the following steps: 1, curing polyborosilazane (PBSZ); 2, ball-milling and crushing; (3) weighing; and 4, preparing slurry. The printing method comprises the steps of 1, printing a primary blank; and 2, curing and sintering. The SiBCN ceramic slurry for direct-writing type 3D printing and the preparation and printing thereof are provided by the invention.

The invention relates to the technical field of preparation of graphene quantum dot nano materials, in particular to a lipophilic graphene quantum dot lubricating oil additive prepared by a one-pot method and application thereof. The specific preparation method comprises the following steps: S1, heating and carbonizing a carbon source; s2, adding an oily modifier into S1, reacting for a period of time, and then cooling to room temperature; s3, putting the base oil into a reaction kettle, adding the material obtained in the step S2 into the reaction kettle, and stirring and mixing; s4, adding a dispersing agent into the reaction kettle in S3, and stirring and mixing; and S5, filtering the material obtained in the step S4, circulating for multiple times by adopting ultrahigh-pressure equipment, and discharging to obtain the graphene quantum dot lubricating oil additive. Wherein the oily modifier further comprises a modified silane coupling agent, and by modifying vinyl trimethoxy silane, the purposes of enhancing the dispersibility of the graphene quantum dots and inhibiting oxidative decay of the lubricating oil are finally achieved.

The invention relates to the technical field of pesticides, in particular to a seed treatment suspending agent and a preparation method and application thereof.The seed treatment suspending agent is prepared from active ingredients and auxiliaries, and the active ingredients account for 1-50 wt% of the seed treatment suspending agent; the active component comprises procymidone. According to the prepared seed treatment suspending agent, the active ingredient procymidone is introduced and applied to coating of soybean seeds, through the synergistic effect of auxiliaries, soybean root rot can be obviously treated, the quality of seedlings is improved, growth of the soybean seedlings is promoted, the prevention and treatment effect can reach 90% or above, resistance is not likely to be generated, and the seed treatment suspending agent has good market application prospects.

The present invention provides a biodegradable high-adhesive antibacterial resin for aluminum-plastic composite and a preparation method thereof, wherein PBAT, TPS, maleic anhydride grafts, Fe-TCPP, antioxidant 1010 and other materials are melt-blended to prepare a plastic film substrate; the obtained plastic substrate is then thermally bonded to a metal aluminum substrate to obtain an aluminum / plastic composite plate having a biodegradable high-adhesive antibacterial resin. The maleic anhydride grafts adjust the compatibility between the flexible structure PBAT and the strongly polar rigid structure plasticized starch to form a local molecular chain penetration, and the matrix has excellent interface polarity and toughness, and can produce great stress loss when bonded to a strongly polar aluminum plate to greatly improve the bonding performance. On this basis, the introduction of the photodynamic antibacterial agent Fe-TCPP can produce more strong interactions with the matrix to ensure its dispersion effect and excellent antibacterial performance without side effects.

The utility model discloses a cooking inner container easy to clean, a plurality of circles of grooves are arrayed on the inner surface of the cooking inner container easy to clean, and each groove is horizontally arranged on the inner surface of the cooking inner container easy to clean. According to the cooking inner container easy to clean, the non-stick effect is achieved through the ring-shaped groove, a non-stick coating mode in the prior art is replaced, and the problem that a non-stick coating is separated after being used for a long time in the prior art is solved.

The present invention provides a method for preparing highly dispersed metal powder and a device for preparing highly dispersed metal powder. The method comprises the steps of (1) adding a base liquid into a synthesis reactor, and performing internal and external circulation of the synthesis reactor through an external circulation dispersion device connected to the synthesis reactor to achieve a stable circulation; (2) after the stable circulation meets a predetermined requirement, continuously adding an oxidizing liquid and a reducing liquid into the synthesis reactor to mix with the base liquid to form a reaction liquid, and continuously passing the reaction liquid through the external circulation dispersion device for forced dispersion, and then feeding it into the synthesis reactor; (3) performing sampling analysis and testing during the synthesis reaction, and when the particle size of the metal powder generated by the synthesis reaction meets the requirement, stopping the addition of the oxidizing liquid and the reducing liquid to stop the synthesis reaction; and (4) discharging the reaction liquid from the synthesis reactor, performing solid-liquid separation, cleaning, post-treatment, and drying to obtain highly dispersed metal powder.

The invention relates to the technical field of amide compound crystallization, in particular to a crystallization process of N, 2, 3-trimethyl-2-isopropyl butyramide, which comprises the following steps: S1, decoloring a produced N, 2, 3-trimethyl-2-isopropyl butyramide crude product, concentrating under reduced pressure, cooling with chilled water for the first time to crystallize, and stirring for 1-5 hours under the condition of heat preservation to obtain a pre-crystallized solution; s2, adding the pre-crystallized solution into an alcohol solvent, carrying out secondary cooling crystallization, and carrying out heat-preservation stirring for 1-3 hours, so as to obtain a wet product of N, 2, 3-trimethyl-2-isopropyl butyramide; and S3, drying the N, 2, 3-trimethyl-2-isopropyl butyramide wet product, so as to obtain an N, 2, 3-trimethyl-2-isopropyl butyramide crystal finished product. According to the invention, the needle-shaped crystal is obtained through a crystallization process, and the cross section area of the needle-shaped crystal is relatively small, so that the contact area at the contact point of the crystal is obviously reduced, the interaction force between the crystals is reduced, and the possibility of caking is reduced especially under a wet condition.

The invention relates to the technical field of cable materials, and particularly discloses a heat-conducting insulated cable material and a preparation method thereof. The preparation method of the heat-conducting insulated cable material comprises the following steps: dispersing hexagonal boron nitride in water, adding a sulfuric acid solution and a hydrogen peroxide solution, stirring in a constant-temperature water bath, cooling, centrifuging, drying, adding tetraisopropyl titanate, ethylene glycol, an antioxidant and terephthalic acid, stirring in a constant-temperature oil bath, reducing the system pressure and stirring, cooling in a vacuum environment, and obtaining the heat-conducting insulated cable material. The activated polyethylene glycol terephthalate is obtained; the preparation method comprises the following steps: adding spherical boron nitride and dopamine hydrochloride into a Tris-HCl buffer solution for ultrasonic treatment, adding amino-terminated polyamidoamine for ultrasonic treatment, centrifuging, washing and drying to obtain activated boron nitride; mixing the activated polyethylene glycol terephthalate and the activated boron nitride, stirring, extruding and cooling to obtain the heat-conducting insulated cable material. The cable material is good in thermal conductivity and insulativity, and the preparation method is simple.

The invention relates to the technical field of drying machines, and discloses a drying machine and a sulfate removal process comprising the drying machine, the drying machine comprises a tank body assembly, a power assembly is arranged on the central axis of the tank body assembly, a feeding hopper is arranged at the top of the tank body assembly, and a stirring assembly and a blocking block are arranged in the feeding hopper; a drying assembly is arranged in the tank body assembly, a turning assembly and a rolling assembly are uniformly arranged on the power assembly, a cleaning assembly is arranged on the turning assembly, a discharging opening is formed in the bottom of the tank body assembly, and sieve plates are uniformly arranged on the drying assembly; according to the crystal drying device, crystals on the drying assembly are continuously overturned by arranging the overturning assembly, so that the crystals can be subjected to uniform heat exchange and rapid drying, caked crystals and bulk crystals are separated by arranging the sieve plate, the caked crystals are crushed in cooperation with the grinding assembly, and mixed packaging of the blocky crystals and the bulk crystals is avoided.

The invention belongs to the technical field of coatings, and particularly relates to an antistatic coating and a preparation method thereof. The epoxy resin and the perfluorinated sulfonic acid resin are jointly used as a resin matrix, polyaniline modification is carried out on the carbon nanotubes, meanwhile, hydroxypropyl methyl cellulose and the carbon nanotubes are cross-linked with each other to form a stable network structure, agglomeration of the carbon nanotubes can be effectively relieved, the dispersity of the carbon nanotubes in the resin matrix is improved, and the performance of the carbon nanotubes in the resin matrix is improved. The finally obtained coating shows excellent surface mechanical properties and antistatic properties.

The present invention discloses a magnesia ash dish stamping and forming equipment, including: a workbench, a plurality of forming holes are arranged on the workbench, and a hopper is installed on the workbench so as to move back and forth; a stamping and forming mechanism, including a downward pressure oil cylinder, and a plurality of forming downward pressure parts are fixedly connected downwardly at the piston rod end of the downward pressure oil cylinder; corresponding forming fixing parts are respectively movably installed in the forming holes, and the bottom of the forming fixing parts is fixedly connected to the corresponding upward push oil cylinder through a spiral spring, and the bottom of the forming fixing parts is respectively fixedly connected to an ultrasonic transducer; a stirring mechanism, including a stirring shaft, and a plurality of corresponding stirring rods are evenly distributed on the stirring shaft; a driving mechanism, which is used to drive the stirring shaft to rotate and synchronously drive the hopper to move back and forth on the workbench. The present invention can effectively ensure the uniformity and accuracy of the material in the forming hole, and can effectively improve the connection of the material discharge, stamping and demoulding processes.

This invention relates to a production process for biodegradable meltblown nonwoven fabric, comprising the following steps: S1, plasticizing and extruding PLA mixed raw materials at a temperature of 80-90℃, and plasticizing and extruding PBAT mixed raw materials at a temperature of 80-90℃; S2, selecting 75-80 parts by weight of PLA mixed raw materials, 25-30 parts by weight of PBAT mixed raw materials, 15-18 parts by weight of grafted material, and 3-5 parts by weight of electrostatic electret masterbatch; S3, uniformly dividing the grafted material into N parts, and feeding 1 / N of the grafted material, 75-80 parts by weight of PLA mixed raw materials, 25-30 parts by weight of PBAT mixed raw materials, and 3-5 parts by weight of electrostatic electret masterbatch into a third screw extruder to form intermediate raw materials; S4, extruding the melt mixture obtained in step S3 through a spinneret; S5, the meltblown fibers in step S4 are cooled by negative pressure suction molding and then enter the high-voltage electrostatic electret to carry charge. The present invention has the following advantages: it can achieve biodegradability, avoid white pollution, and at the same time ensure that the meltblown fabric produced has high filtration efficiency.

The invention belongs to the technical field of preparation of monatomic nano-enzyme materials, and particularly relates to a high-load Pt monatomic nano-enzyme as well as a preparation method and application thereof. The preparation method comprises the following steps: (S.1) dissolving FeCl3. 6H2O, H2PtCl4. 6H2O and PPh3 in DMF (Dimethyl Formamide), and carrying out rotary stirring to obtain a solution 1; dissolving BDC in DMF (Dimethyl Formamide) to obtain a solution 2; quickly adding the solution 2 into the solution 1, transferring the obtained mixed solution into a stainless steel high-pressure reaction kettle, carrying out hydrothermal reaction, and after the reaction is finished, washing the obtained product with ethanol and drying to obtain a pyrolysis precursor; and (S.2) placing the precursor in a graphite sample table groove of a Joule heat rapid heating device, carrying out Joule heat shock treatment, and cooling to room temperature to obtain the high-load Pt monatomic nano-enzyme. According to the invention, migration and agglomeration of Pt atoms at high temperature are inhibited, long-time sintering of a carrier skeleton is avoided, and high specific surface area and porous structure of the material are retained.