244results about How to "Improve physical performance" patented technology

The invention relates to a high-performance composite board prepared from waste wind power blades and a preparation method of the high-performance composite board. The high-performance composite board contains a large amount of waste wind power blade powder and waste wind power blade degraded glass fibers, so that the manufacturing cost of the high-performance composite board can be reduced; in addition, powder made of waste wind power blades and regenerated glass fibers obtained through a chemical degradation method can be recycled, resource utilization of the retired wind power blades is achieved, and the resource utilization problem of the retired wind power blades is effectively solved. Besides, the coupling effect of the waste wind power blade powder and the waste wind power blade degraded glass fiber with the thermoplastic resin is good, and under the synergistic effect of the compatilizer, the wood flour, the filler, the lubricant and other materials, the mixing and stirring effect can be improved, and the service life of the material is prolonged. Waste wind power blade powder and waste wind power blade degraded glass fibers can be uniformly dispersed in the high-performance composite board, and the physical properties of tensile resistance, bending resistance and compression resistance of the composite board can be improved.

The invention relates to an aluminum oxide industrial waste residue treatment technology, in particular to a red mud synchronous dealkalization soil treatment method. According to the method, citric acid and calcium nitrate are adopted as treating agents to cooperatively treat the red mud, the sodium content requirement of planting soil is taken as the standard, the red mud is dealkalized to reduce the sodium content, meanwhile, the granularity of the dealkalized red mud is improved, the organic matter content of the dealkalized red mud is increased, and then the dealkalized red mud and normal soil are mixed in proportion to form the dealkalized red mud soil. The physicochemical indexes of the dealkalized red mud soil are as follows: the volume weight is 1.18-1.26 g / cm < 3 >, the organic matter content is 10.6-12.3%, the pH value is 7.2-7.35, the EC is 0.492-0.562 ms / cm, and the specific surface area is 51.49-59.80 m < 2 > / g. The dealkalized red mud soil obtained through the synergistic treatment of the citric acid and the calcium nitrate completely meets the physicochemical properties of the soil and the planting requirements of plants.

The invention relates to the technical field of powder metallurgy, in particular to a method for preparing a graphene composite copper plate strip by using red copper waste through combination of powder metallurgy and a medium-temperature continuous extrusion process, and the method comprises the following steps: selecting the red copper waste containing different components according to an application scene of the graphene composite copper plate strip; crushing the red copper waste into red copper blocky crushed aggregates; adding 0.1-8% by mass of graphene into the red copper blocky crushed aggregates, and grinding to form first-size mixed powder; carrying out semi-melting stirring processing on the mixed powder with the first size to form a graphene-red copper mixed base material, and carrying out continuous extrusion treatment; and the graphene composite copper plate strip blank is treated according to a conventional red copper cold rolling process, and the graphene composite copper plate strip is obtained. According to the method, a powder metallurgy process is combined with a medium-temperature continuous extrusion process, so that the red copper waste is recycled in a non-smelting mode, and a parent body of the high-performance graphene composite copper plate strip is produced. The invention further correspondingly discloses application of the graphene composite copper plate strip.

The invention discloses a high-quality formed ginkgo wood furniture manufacturing and processing technology, and relates to the technical field of furniture production, and the high-quality formed ginkgo wood furniture manufacturing and processing technology comprises ginkgo wood selection, ginkgo wood treatment, wood modification, part processing and surface treatment. Before drying, the cut ginkgo biloba boards are subjected to primary treatment, surface impurities are removed, and primary balance treatment is carried out, so that stress concentration in the later drying process is reduced; primarily drying the primarily treated wood, adjusting the thickness and the drying temperature and humidity of the wood, adjusting the temperature in the drying chamber according to the thickness and the initial water content of the wood by using a combined drying technology, and controlling the distance between the wood to be 1 / 10-1 / 8 of the width of the wood through a circulating air drying system. By means of the combined drying technology, dynamic control over the ginkgo wood drying quality is achieved, the problems that the drying process is complex and wood is prone to warping or cracking during drying are solved, the drying period is shortened, wood deformation and cracking are reduced, the physical performance of the wood is improved, and the drying efficiency is improved.

The invention discloses nanoscale high-entropy A2B2O7 type oxide ceramic powder and a preparation method of a nano ceramic block of the nanoscale high-entropy A2B2O7 type oxide ceramic powder, and the preparation method comprises the following steps: S1, uniformly dispersing a rare earth element source and a transition metal source in deionized water, stirring at room temperature, and then adding a polymerizing agent and an inducer to obtain a mixed solution; s2, continuously stirring at room temperature to form a transparent clear solution; s3, heating the transparent clarified solution until milk white gel is gradually formed; and S4, drying the milk white gel into dry gel. According to the nanoscale high-entropy A2B2O7 type oxide ceramic powder and the preparation method of the nano ceramic block of the nanoscale high-entropy A2B2O7 type oxide ceramic powder, discharge plasma sintering is combined with a two-step preparation process, the efficiency is high, sintering is compact, the grain size of a ceramic block material can be controlled, and the nano ceramic block can be used for preparing the nano-scale high-entropy A2B2O7 type oxide ceramic powder. And the synthesized oxide has the characteristics of fine powder particle size, uniform distribution, few impurities and the like, and the method is low in synthesis temperature and relatively low in cost.

The feeding mechanism of the 3D printing device comprises a liquid adding box, a C-opening isolation cover is integrally formed on the inner wall of one side of the liquid adding box, the interior of the liquid adding box is divided into a cavity and a resin groove through the C-opening isolation cover, the resin groove is used for containing photosensitive resin, a bottom plate is fixed in the cavity, and the bottom plate is used for containing the photosensitive resin; a liquid storage box is installed at the top end of the bottom plate, and a multi-layer H-shaped liquid injection structure used for forming a plurality of feeding points at different heights is installed on the inner wall of the liquid adding box. The photosensitive resin liquid simultaneously enters the resin tank from different directions, uniform concentration distribution of the resin liquid in the whole resin tank is guaranteed, the curing effect in the printing process is improved, the resin liquid enters the resin tank in a multi-point supply mode, a light source can more effectively irradiate each feeding point, and the printing efficiency is improved. Therefore, a faster photocuring process is realized, and the phenomena of insufficient illumination and incomplete curing reaction in some areas are avoided.

The invention discloses a glass fiber reinforced nylon material with high alcoholysis resistance, and relates to the technical field of glass fiber reinforced nylon materials. Raw materials of the high-strength and high-toughness composite material comprise the following components in parts by weight: 30-43 parts of PA46, 20-25 parts of PA66, 15-7 parts of PA115, 3-5 parts of bio-based nylon, 20-45 parts of alkali-free glass fibers, 1-3 parts of polyethylene, 0.5-3 parts of an antioxidant, 0.2-3 parts of a heat stabilizer, 0.1-5 parts of a compatilizer, 1-5 parts of a flexibilizer, 0.2-0.5 part of a hydrolysis-resistant agent, 1-2 parts of an ultraviolet light absorber, 0.1-2 parts of a silane coupling agent, 0.1-0.5 part of a nucleating agent, 1-5 parts of hollow glass beads and 3-8 parts of mica. The glass fiber reinforced nylon material is prepared by mixing the raw materials according to the set proportion and sequence, the glass fiber reinforced fiber material with high alcoholysis resistance is finally obtained, a small amount of mica is added into the matrix raw materials, the insulativity and heat resistance of the prepared glass fiber reinforced nylon material are improved to a certain extent, and the service life of the glass fiber reinforced nylon material is prolonged. The range of products made of the material is expanded, the stability of the products is improved, and the products can resist corrosion of strong acid and strong alkali.

The present invention relates to the technical field of powder metallurgy, and more particularly to a method for preparing a graphene composite copper strip by powder metallurgy combined with a medium-temperature continuous extrusion process using copper waste. According to the application scenario of the graphene composite copper strip, copper waste containing different components is selected; the copper waste is crushed into copper block fragments; 0.1-8% of graphene by mass is added to the copper block fragments, and a first-size mixed powder is formed by grinding; the first-size mixed powder is semi-melted and stirred to form a graphene-copper mixed substrate, which is continuously extruded; the graphene composite copper strip blank is processed with reference to a conventional copper cold rolling process to obtain a graphene composite copper strip. The present invention combines a medium-temperature continuous extrusion process with a powder metallurgy process to realize the recycling of copper waste in a non-smelting manner and the production of a matrix of a high-performance graphene composite copper strip. The present invention also discloses the application of the graphene composite copper strip.

The invention discloses a purification method and a purification device for crystallized magnesium, and relates to the field of magnesium metal smelting. The method comprises the following steps: under the protection of an inert atmosphere, firstly carrying out pressure-applying melting treatment on a magnesium material to be smelted, and then carrying out pressure-applying filtering treatment on a product obtained after the melting treatment, so as to complete the flux-free smelting process of the magnesium material. And meanwhile, the metal magnesium liquid and most of the oxide shells are separated by utilizing the liquidity difference between the liquid metal magnesium and the solid oxide shells. Compared with a conventional smelting process without pressure application, the method has the advantages that the melting rate of the crystallized magnesium can be remarkably increased, most of oxide impurities are removed, a series of pollution problems caused by flux use are solved from the source, and low-cost, high-efficiency and high-quality smelting of the crystallized magnesium is realized.

The invention belongs to the technical field of metal adsorption material preparation, and particularly relates to a preparation method of an attapulgite composite cellulose hydrogel material, which comprises the following steps: (1) uniformly dispersing acid modified attapulgite in water, then adding sodium alginate and polyvinyl alcohol, heating and stirring; (2) adding sodium carboxymethyl cellulose, and continuously stirring to obtain a mixed solution; and (3) injecting the mixed solution into a mold by using an injector, freeze-thawing, freeze-drying, immersing into a CaCl2 solution, cross-linking, washing for multiple times, and freeze-drying again to obtain the attapulgite composite cellulose hydrogel material. Sodium alginate, polyvinyl alcohol, sodium carboxymethyl cellulose and acid modified attapulgite in a proper proportion are matched with a multiple freeze drying method to construct a three-dimensional structure with multiple chemical adsorption, high specific surface area, long diffusion channel and abundant pores, so that the adsorption efficiency and the adsorption capacity of the composite material are improved, and various application requirements are met.

The invention provides an organic silicon adhesive, a preparation method thereof and a photovoltaic module. The organic silicon adhesive is prepared from the following components in parts by weight: 42 to 50 parts by weight of hydroxyl-terminated polydimethylsiloxane, 1 to 4 parts by weight of dimethyl silicone oil, 31 to 36 parts by weight of surface modified nano calcium carbonate, 11 to 16 parts by weight of alkoxy modified MQ resin, 3 to 4 parts by weight of a cross-linking agent, 0.4 to 0.7 part by weight of a silane coupling agent and 0.1 to 0.3 part by weight of a catalyst. The organic silicon adhesive disclosed by the scheme has relatively high bonding strength and good physical properties and mechanical properties, so that the organic silicon adhesive has excellent bearing capacity when being applied to a large-model assembly, and the service life of a photovoltaic assembly is prolonged.

The invention relates to the field of wear-resistant materials, in particular to a preparation method of a phenolic resin friction material with a reinforced fiber interface, which comprises the following steps: 1, preparation of fibers with an organic silicon modified graphene oxide reinforced interface: pre-mixing graphene oxide and an organic silicon coupling agent for reaction, dispersing in a solvent under the condition of ultrasonic waves, and drying to obtain the fibers with the reinforced fiber interface; adding reinforced fibers into the graphene mixed solution; the phenolic resin, the reinforcing fibers and the filler are fully and evenly mixed and then poured into a preheated mold, heating compression is conducted under certain pressure and temperature, curing forming is conducted after a certain time, graphene oxide not only improves the interface bonding strength, but also improves the friction performance of the friction material; and the heat transfer efficiency of the whole composite material is also improved, so that the composite material has more stable performance under a high-temperature condition. The preparation method comprises the steps of mixing, dispersing, molding and curing the phenolic resin, the reinforced fibers, the graphene oxide and the coupling agent.

The invention discloses a clindamycin phosphate vaginal gel preparation device and method, and belongs to the technical field of pharmacy. The method comprises the steps that after clindamycin phosphate vaginal gel is prepared by a preparation tank, the clindamycin phosphate vaginal gel is filled into a vacuum defoaming tank through a feeding opening in the bottom of the vacuum defoaming tank, and a packaging tank is conveyed to a rotary positioning mechanism through a conveying mechanism; and the filling mechanism is used for filling the clindamycin phosphate vaginal gel stored in the vacuum defoaming tank into the packaging tank on the rotary positioning mechanism. The invention aims to solve the problems that the existing clindamycin phosphate vaginal gel is complex in preparation process and difficult to carry out constant temperature control, the preparation and filling process needs to be transferred for multiple times, the viscosity of the gel can change along with time, temperature or storage conditions, the uniformity of the gel and the use experience of a patient are influenced, and the gel is difficult to be used. And the filled finished product gel is very easy to have a large number of bubbles, so that a more transparent and uniform gel product can be obtained, and the physical property and the use comfort of the gel are improved.

The invention discloses a preparation method of desert sand ceramic aggregate and application of the desert sand ceramic aggregate. The preparation method comprises the following steps: firstly, adding water into a desert sand raw material, and ball-milling to obtain slurry; then the slurry is subjected to forming, sintering treatment and acid pickling treatment in sequence, and ceramic aggregate is obtained after the acid pickling treatment is finished; according to the application of the desert sand ceramic aggregate, the ceramic aggregate prepared by the preparation method of the desert sand ceramic aggregate is used as concrete aggregate, asphalt aggregate or high-molecular polymer mortar aggregate; the ceramic aggregate prepared by the preparation method of the desert sand ceramic aggregate is used as a channel fracturing propping agent in the exploitation industry of petroleum, natural gas, coal bed gas or shale gas, or is used as a heat insulation material in the building industry. By using the method provided by the invention, the desert sand-containing ceramic aggregate with different purposes can be produced.

The invention discloses a solid waste-based multifunctional tailing asphalt pavement material and a preparation method thereof, and the pavement material comprises the following components in parts by mass: 4.5-5.5 parts of polyurethane modified asphalt, 45-60 parts of titanate modified iron tailings, 2-5 parts of surface activated copper tailing powder, 20-35 parts of copper tailing sand and 0.5-1.0 part of acetic anhydride modified wollastonite fiber. The high and low temperature performance, the durability and the self-healing performance of the asphalt mixture are comprehensively improved by modifying the solid waste tailing material and the asphalt, and the application range of the asphalt mixture is effectively widened.

The present application provides a foamed ceramic prepared by rare earth blast furnace slag and coal gangue and a preparation method thereof. The method of the present application includes ball milling raw materials including rare earth blast furnace slag, coal gangue, crushed silica, low melting point solid waste raw materials, and talcum powder until they pass through a 200-mesh sieve; adding water to the sieved raw materials and foaming agent for wet grinding to obtain a slurry; drying the slurry and grinding it to obtain a powder; spreading the powder in a mold and pressing it into a shape to obtain a molded blank; heating the molded blank to obtain a foamed ceramic. The preparation method of the present application adopts a direct sintering method to prepare foamed ceramics, which not only opens up a new way to mass-produce and high-value utilization of solid wastes such as rare earth blast furnace slag and coal gangue, but also solves the environmental pollution problem caused by solid wastes, and the prepared foamed ceramics have excellent performance.

A cotton plucking device for improving the toughness of cotton yarns comprises a raw material bin in the form of a cylinder, a rotating shaft is provided in the middle of the raw material bin, a rotating track is provided on the outside of the raw material bin, and a cotton plucking machine body is provided between the rotating shaft and the rotating track; the cotton plucking machine body comprises a rotating frame, one side of the rotating frame is slidably mounted on the rotating track, and the side of the rotating frame away from the rotating track is movably connected to the rotating shaft; the rotating frame comprises a scattering and adsorption mechanism, and an enhancer input port is provided on the upper part of the scattering and adsorption mechanism. The present application provides a space for the cotton plucking machine body to rotate around the raw material bin by providing a raw material bin and a rotating shaft and a rotating track provided therewith, and by providing an enhancer input port, the enhancer can be attached to the cotton fiber at the most fluffy stage of the cotton, thereby improving the physical properties of the cotton fiber.

The invention discloses a preparation method of high-toughness dust-free paper, and relates to the technical field of dust-free paper preparation, the high-toughness dust-free paper comprises 10-60 parts of a first layer, 10-30 parts of a second layer and 10-20 parts of a third layer, the first layer comprises wood pulp fiber, the second layer comprises polypropylene fiber, the third layer comprises high-molecular water-absorbent resin and aramid fiber, and the third layer comprises water-absorbent resin and aramid fiber. The wood pulp fibers have the characteristic of soft texture, so that the dust-free paper does not scratch or damage the surface of an object in the wiping process, and the polypropylene fibers and the aramid fibers are added, so that the strength and the toughness of the dust-free paper are further enhanced, the dust-free paper is more durable, the dust-free paper can be kept stable in a severe working environment, and the service life of the dust-free paper is prolonged. The dust-free paper is not easy to age or deform, and the molecular structure of the aramid fibers can keep stable under high-temperature and high-pressure occasions, so that static electricity generated in the use process of the dust-free paper can be effectively reduced, and sensitive equipment and components are protected from being damaged by the static electricity.

The invention relates to the technical field of cement grinding aids, in particular to a composite liquid cement grinding aid and a preparation method of the composite liquid cement grinding aid. Maleic anhydride, triethanolamine, acrylic acid and isopentenyl polyoxyethylene ether are used as raw materials in a macromolecular grinding aid solution; a reaction product of maleic anhydride and triethanolamine can form a compound with special functional groups, the functional groups can be effectively adsorbed on the surfaces of cement particles, friction among the particles is reduced, the grinding efficiency is improved, and the dispersity and stability of the grinding aid can be further enhanced by adding acrylic acid and isopentenyl polyoxyethylene ether, so that the grinding aid has a good application prospect. The cement particles are more easily dispersed in water, the agglomeration phenomenon is reduced, and the refining of the cement particles is facilitated; according to the invention, sodium lignin sulfonate is modified by grafting diethanolamine, and on the basis of retaining the original dispersibility of sodium lignin sulfonate, a new functional group is introduced, so that the interaction between sodium lignin sulfonate and cement particles can be enhanced, and the grinding aiding effect is further improved.

The invention discloses an organic silicon resin and a preparation method thereof, and relates to the field of organic silicon resin preparation, the first step is that methylsilane is placed in a stirring barrel, a catalyst is added, a prepolymerization reaction is carried out through catalysis of the catalyst to form an oligomer, after the prepolymerization reaction is completed, a filler and a cross-linking agent are added into the oligomer, and a mixture is obtained; the preparation method comprises the following steps: carrying out cross-linking and curing on a high-energy ultrasonic amplitude-change pole, and carrying out defoaming treatment after cross-linking and curing to remove bubbles in a cross-linked and cured material so as to obtain the organic silicon resin. In actual operation, the arranged ultrasonic generator can transmit ultrasonic waves to the high-energy ultrasonic amplitude-change pole, and the high-energy ultrasonic amplitude-change pole is in contact with the material; compared with the prior art, the reaction kettle has the advantages that sufficient and uniform mixing of various materials in the kettle body can be effectively promoted, segregation of a certain monomer material is avoided, the reaction efficiency is greatly improved, meanwhile, ultrasonic waves can enable high-frequency continuous vibration to be generated among the materials, bubbles in the materials are discharged or broken, and the organic silicon resin structure is tighter.

The invention belongs to but not limited to the technical field of hydrogel, and particularly relates to a processing method of tough, transparent and adhesive supramolecular hydrogel, which comprises the following steps: step 1, preparing a supramolecular hydrogel precursor with a specific shape; step 2, dissolving the prepared precursor in water; step 3, freezing under a low-temperature condition; step 4, standing the frozen supramolecular hydrogel in air or dry inert gas; step 5, cutting and folding the obtained hydrogel, and processing the hydrogel into another shape; and 6, swelling the processed hydrogel in an acid-containing nutrient solution to obtain the final hydrogel. By adopting a supramolecular strategy and utilizing a high-density supramolecular network formed by tannic acid (TA) and polyvinyl alcohol (PVA), the mechanical property, transparency and adhesiveness of the hydrogel are remarkably improved.

The invention provides a brominated butyl rubber piston for a pre-filled syringe and a preparation method of the brominated butyl rubber piston, and relates to the technical field of rubber pistons. The brominated butyl rubber piston comprises a basic elastomer and an inert barrier film covering the surface of the basic elastomer. The basic elastomer comprises brominated butyl rubber, bio-based rubber, polyisobutene, talcum powder, calcined kaolin, carbon black, magnesium powder, titanium dioxide, sulfur, active magnesium oxide, polytetrafluoroethylene wax and a slip agent; the inert barrier membrane is polytetrafluoroethylene modified by modified polydimethylsiloxane. The pharmaceutical composition has good drug compatibility and administration convenience, and ensures the safety of medication.

The invention discloses a biodegradable composite polylactic acid packaging bag and a preparation method thereof, belongs to the technical field of biodegradable materials, and aims to solve the technical problem that the mechanical property, heat resistance and biodegradation rate of a polylactic acid material in the prior art need to be further improved. The material comprises the following components in parts by weight: 90-100 parts of modified polylactic acid, 10-15 parts of modified starch, 15-20 parts of modified nanofiber, 4-8 parts of pigment and 5-7 parts of additive, and is prepared by taking the modified polylactic acid as a basic raw material, the modified starch and the modified nanofiber as reinforcing materials and the pigment and the additive as auxiliary additives. The mechanical strength and high temperature resistance of the packaging bag are effectively improved, and the biodegradability of the packaging bag is improved, so that the packaging bag better meets the requirements of express and logistics industries on biodegradable packaging materials.

The present invention belongs to the technical field of coatings, and specifically relates to a sand-walled architectural coating and a preparation method thereof. The sand-walled architectural coating is composed of the following components by mass: 35-50 parts of polyurethane emulsion, 5-8 parts of ZnO-MgO catalyst, 8-12 parts of TCA hybrid, 5-8 parts of diallylamine, 10-15 parts of calcined kaolin, 5-10 parts of crop carbonization, 3-5 parts of coating additives, and 15-20 parts of water; wherein the TCA hybrid is mainly prepared by reacting cardanol glycidyl ether, aminopropyl triethoxysilane and tannic acid. The preparation method of the sand-walled architectural coating of the present invention is simple, and the prepared sand-walled architectural coating has excellent formaldehyde removal performance and good water resistance and stain resistance.

The invention relates to the technical field of degradable plastics, and particularly discloses a starch-based biodegradable plastic and a preparation method thereof.The preparation method includes the steps that high-amylose starch (such as corn, potatoes and cassava) is selected as a raw material and cleaned, dried and ground to obtain starch powder, a natural plasticizer (such as glycerin) is added to improve the flexibility, and the starch-based biodegradable plastic is obtained; a chemical cross-linking agent (such as glutaraldehyde) is used for enhancing the strength and the heat stability, an antioxidant (such as vitamin E) and an antibacterial agent (such as tea polyphenol) are used as additives, and the mass ratio of the antioxidant to the antibacterial agent is (0.6-0.85): (0.05-0.2): (0.005-0.03): (0.001-0.01): (0.001-0.005). The starch-based bioplastic prepared by the invention has good degradation performance and adjustability, is particularly suitable for the fields of disposable packaging, agricultural films, medical materials and the like, has a natural antibacterial function and ultraviolet protection capability, has huge application potential in the fields of medical treatment, food packaging and environmental protection, and has wide application prospects. The advantages of the starch-based plastic in agricultural application are also realized.

The invention discloses a photo-thermal response type composite antibacterial wound dressing as well as a preparation method and application thereof, and relates to the technical field of antibacterial dressings. The wound dressing comprises a nanofiber membrane capable of generating photo-thermal response to near-infrared light; the nanofiber membrane is a spinning product obtained by electrostatic spinning of a spinning solution prepared from polyvinyl alcohol, polyacrylic acid and a core-shell structure composite material; the composite material with the core-shell structure is a composite material with a core-shell structure formed by taking a silver nanorod as a core and mesoporous silica as a shell; wherein the mesoporous silica shell of the composite material with the core-shell structure is doped with an antibacterial drug. The antibacterial agent and the nano-silver in the composite material with the core-shell structure are used for synergistically resisting bacteria, so that the usage amount of the nano-silver is reduced, and the cytotoxicity of the nano-silver is relieved; according to the invention, the problems of cytotoxicity of nano-silver, tedious preparation process of the self-stripping antibacterial dressing, complex components and the like are relieved.

The invention relates to a high-performance biological filler for advanced sewage treatment and a preparation method of the high-performance biological filler. The biological filler comprises a nitrogen removal component, a phosphorus removal component, an inorganic carbon source component, an active component, 2-5 parts of a filler reinforcing component, a rare element component and a pore forming agent. The high-performance biological filler for advanced sewage treatment does not need any organic bonding agent or pore-forming agent, can simultaneously realize various functions of autotrophic denitrification, chemical phosphorus removal, heavy metal adsorption passivation, microbial adsorption biofilm formation and the like, has better physical properties, remarkably improves the sewage treatment effect, and greatly reduces the treatment cost.

The invention provides a dual-curable polyoxazolidinone prepolymer and a resin composition for 3D printing, and particularly relates to the technical field of 3D printing materials. The dual-curable polyoxazolidinone prepolymer is prepared by the following steps: carrying out first reaction on dihydric alcohol and diisocyanate to generate an isocyanate-terminated polyurethane prepolymer; carrying out second reaction on the polyoxazolidinone and epoxy resin to generate polyoxazolidinone with isocyanate at two ends; and finally, carrying out third reaction on the polyoxazolidinone and a sealing agent to obtain the dual-cured polyoxazolidinone prepolymer. And the sealing agent is an aminomethacrylate compound. The polyoxazolidinone prepolymer provided by the invention provides excellent toughness through a polyurethane part synthesized by dihydric alcohol, and photo-thermal dual curing is realized through metacrylic acid ester end capping. The dual-curing mode not only improves the crosslinking density and uniformity, but also significantly enhances the mechanical properties, including strength, toughness and durability, of the material, so that the material can be efficiently cured under illumination or heating conditions to form a uniform three-dimensional network structure.

The mica paper-based insulating plate for the new energy automobile comprises a mica plate base plate, the mica plate base plate is formed by hot-pressing and compounding multiple layers of impregnated mica paper, array through holes are formed in the surface of the mica plate base plate, and the array through holes are filled with buffer structural bodies; the buffer structure body is provided with an outer cylinder, the height of the outer cylinder is 80-90% of the thickness of the substrate, the outer cylinder is formed in the array through holes in a cementing mode, the upper side and the lower side of the outer cylinder are sealed through PVC film layers, and a cylinder cavity is filled with inert insulating media. The two sides of the base plate take a gum dipping nylon fabric net surface as a composite interface, a composite surface layer is formed on the surface and comprises a silicone rubber flexible inner layer and a polyimide or epoxy resin plastic outer layer, and a nano reinforced filler layer is clamped between the interfaces. The mica paper-based insulating plate disclosed by the invention has excellent electrical insulation performance, impact resistance, buffer performance, durability, oxidation resistance, processability and the like, and has wide application prospects and remarkable economic benefits.

The invention belongs to the technical field of film materials, and particularly relates to a high-barrier polyethylene film and a preparation method thereof. The material consists of a polyethylene-based film layer, a coating barrier layer and an aluminum-plated layer, wherein the polyethylene-based film layer is prepared by combining nine layers of co-extruded films with a micro-stretching process; the coating blocking layer is composed of a water-based acrylic acid coating layer and a water-based polyvinyl alcohol coating layer which are connected in sequence, the polyvinyl base film layer is coated with the water-based acrylic acid coating layer, and the aluminum plating layer is plated on the water-based polyvinyl alcohol coating layer in a vacuum mode. The high-barrier polyethylene film material is good in barrier effect and can be recycled.