1034 results about "Temperature treatment" patented technology

The present application relates to the technical field of polyimides and relates to a preparation method for a high-performance polyimide and an application thereof, aiming to solve the problems in the prior art such as numerous side reactions and severe impact on transparency caused by an excessively high imidization reaction temperature during the use of a high-temperature thermal imidization method for the preparation of polyimides. The preparation method comprises: (1) preparing a polyamic acid solution; (2) adding a chemical catalyst and a polyamic acid solution to partially complete an imidization reaction; (3) adding an end group auxiliary agent, performing coating with the solution, heating, and maintaining the heat to complete the imidization reaction; and (4) carrying out high-temperature treatment to obtain a high-performance polyimide. The present application can significantly reduce numerous side reactions present in a traditional imidization reaction, eliminate an adverse effect of high-temperature imidization on the optical performance, greatly improve the mechanical properties, heat resistance, optical performance, etc. of a material, and also achieve both high heat resistance and high transparency.

The invention relates to the technical field of optical cement, in particular to high-temperature-resistant acrylic optical cement with high light transmittance and a preparation method of the high-temperature-resistant acrylic optical cement. The preparation method of the high-light-transmittance high-temperature-resistant acrylic optical adhesive comprises the following steps: (1) under the protection of inert gas, mixing an acrylate monomer, a carboxyl-containing monomer, an epoxy-containing monomer, a hydroxyl-containing monomer, a photoinitiator and modified inorganic nanoparticles, and stirring at 60-90 DEG C and 200-600rpm for 3-8 hours to obtain an adhesive solution; and (2) carrying out vacuum curing on the glue solution at 50-80 DEG C for 5-15 minutes to form a glue material, pressing the glue material into a film, and cooling to obtain the optical cement. The prepared high-temperature-resistant acrylic optical adhesive with high light transmittance has good light transmittance, high-temperature resistance and good peel strength, the light transmittance of the optical adhesive is larger than 90%, the heat-resistant temperature is larger than 150 DEG C, the peel strength is larger than 14 N / 25 mm, and the peel strength after high-temperature treatment is larger than 11.8 N / 25 mm.

The invention discloses an aluminum substrate UV matt finish paint and a preparation process thereof, and relates to the technical field of paints.The aluminum substrate UV matt finish paint is prepared from, by mass, 10%-20% of modified polyurethane acrylate, 25%-32% of high-functionality aliphatic polyurethane acrylate, 18%-30% of special modified epoxy acrylate resin, 0.5%-2% of dispersing agent, 0.1%-0.5% of defoaming agent, 1%-3% of anti-settling powder and the balance water. The paint is prepared from the following components in percentage by weight: 10 to 15 percent of magnesium silicate mineral, 1 to 10 percent of matting powder, 0.2 to 1 percent of 1-hydroxycyclohexyl phenyl ketone, 0.5 to 3 percent of trimethylbenzoyl-diphenyl phosphine oxide, 1 to 3 percent of acrylate flatting agent, 0.2 to 1.2 percent of polyurea modified polyurethane rheological agent and 5 to 15 percent of trimethylolpropane triacrylate. According to the UV matte finishing paint disclosed by the invention, through compounding of ternary resin and enhancement of nano silicon dioxide, a rigid and tough cross-linked network is constructed, a paint film is free of cracks when being bent at 180 degrees, the adhesive force reaches grade 0, and a coating is resistant to acid and alkali etching liquid and free of corrosion by cooperating with a silane coupling agent and a light stabilization system, and the color difference is delta Elt after the UV matte finishing paint is subjected to high temperature of 260 DEG C; and 1.5, the anti-yellowing performance is excellent.

The utility model relates to the technical field of mobile phone heat dissipation films, in particular to a high-heat-conduction mobile phone middle frame graphite heat dissipation film which comprises a heat dissipation film body, the heat dissipation film body sequentially comprises matte black single-faced adhesive tape, a high-heat-conduction graphite layer and double-faced adhesive tape from top to bottom, the high-heat-conduction graphite layer is formed by stacking low-temperature carbonization layers and is 0.2 mm in thickness, and the high-heat-conduction graphite layer is formed by stacking low-temperature carbonization layers. The low-temperature carbonization layer is formed by graphene through low-temperature carbonization treatment, the heat conductivity coefficient reaches 2000-2100 W / M.K, energy consumption is reduced through low-temperature treatment, the production cost is indirectly reduced due to the low temperature requirement, the graphene is subjected to low-temperature carbonization treatment, the lattice defect density is reduced, and the stability of the heat conductivity coefficient is ensured; and meanwhile, the 0.2 mm high-thermal-conductivity graphite layer is formed by stacking the low-temperature carbonization layers, so that the occupied space of the heat dissipation film body in the middle frame is reduced.

According to the lithium battery and the preparation method thereof provided by the invention, dual mechanisms of free radical polymerization and ring-opening polymerization are combined, a stable double-crosslinking structure gel electrolyte constructed by two polymers can be obtained in an in-situ polymerization process, and the mechanical strength and the thermal stability are improved; by regulating and controlling the ratio of an epoxy monomer to an acrylate monomer, firstly, room-temperature ring-opening polymerization is performed, so that part of in-situ gel is formed before formation, smooth formation of a gel interface is ensured, the first coulombic efficiency of the battery is not influenced, and meanwhile, the dosage of the acrylate monomer and a corresponding thermal initiator is reduced; high-temperature treatment is carried out after formation, so that the interface aging of the battery is stable, the cycle life of the battery is prolonged, the acrylate monomers are polymerized, the high temperature continues to promote the polymerization of the residual epoxy monomers, the polymerization conversion rate is favorably increased, and the high-pressure resistance and oxidative decomposition resistance of the gel electrolyte are improved.

The utility model discloses a liquid nitrogen type cooling sample table for vacuum coating, which comprises a rotating table, a first lifting table mounted on the rotating table, a hollow interlayer pipe mounted on the first lifting table, a hollow shaft arranged on the rotating table and driven by the rotating table to rotate, and a second lifting table arranged on the outer side of the hollow shaft and connected with the rotating table. A wafer bracket is arranged at the end, away from the rotating table, of the hollow shaft. According to the utility model, the structure is simple, through the arrangement of the liquid nitrogen chamber, after a sample is subjected to high-temperature treatment, the liquid nitrogen chamber can be utilized to quickly cool the sample to a liquid nitrogen low temperature, and then under the action of the first lifting platform, the first lifting platform drives the liquid nitrogen chamber and the heating disc to perform synchronous height lifting adjustment, so that the distance between the heating disc and the wafer holder is adjusted; when the liquid nitrogen chamber and the heating disc are spaced from the wafer support by a certain distance, a worker can more conveniently put a sample into the wafer support for treatment, and then the sample on the wafer support can be subjected to high-temperature treatment or cooling treatment by adjusting the height of the liquid nitrogen chamber and the height of the heating disc respectively.

The invention provides a method for identifying the high temperature resistance of soybeans in the whole growth period and application of the method. The method comprises the following steps: detecting physiological and biochemical indexes, agronomic characters and yield character characteristics in each growth and development period of soybean seeds sown under control treatment and high-temperature treatment, and counting correlation among the indexes; the method comprises the following steps: calculating a high-temperature-resistant coefficient responding to a high-temperature stress character, analyzing correlation among different indexes by using a significant difference high-temperature-resistant coefficient, and rating the high-temperature-resistant grade of the sown soybean according to a high-temperature-resistant membership function value and a clustering analysis result through standardization analysis of a principal component and a membership function. The method is applied to the cultivation of new high-temperature-resistant soybean varieties, and three high-temperature-resistant soybean varieties, namely Jiangxi bean No.1, Jiangxi bean No.1 and Tibetan bean No.1, are cultivated.

The invention discloses an ejector pin anti-fatigue strengthening method based on multi-section variable-temperature treatment, and relates to the technical field of ejector pin anti-fatigue strengthening, and the ejector pin anti-fatigue strengthening method comprises the following steps: austenitizing high-temperature quenching: heating an ejector pin to an austenitizing temperature, and then carrying out zoned cooling on the ejector pin; medium-temperature tempering and thermal-state mechanical strengthening are conducted, specifically, the ejector pin is tempered at the medium-temperature tempering temperature, and thermal-state shot blasting or laser shock is conducted on the ejector pin in the heat preservation period or after heat preservation is completed; intermediate low-temperature plasma nitriding: carrying out plasma nitriding in a nitrogen-hydrogen gas environment; subzero treatment: placing the ejector pin in liquid nitrogen; and finally, low-temperature tempering and cold-state mechanical strengthening are conducted. Through multi-section temperature gradient treatment, phase change distribution control over different temperature sections is achieved, too high internal stress and brittleness generated by one-time quenching are avoided, sudden size change and hot cracks induced by phase change are prevented, a controllable surface-core hardness and toughness gradient is formed, the surface crack initiation tendency is reduced, and the surface quality is improved. And the consistency and controllability of anti-fatigue basic conditions are improved.

The invention provides a preparation method of a plate-shaped glassy carbon electrode, which comprises the following steps: curing a resin raw material into a plate-shaped resin block, carbonizing in an inert atmosphere, and respectively introducing a nitrogen source and a boron source for doping operation to obtain a co-doped plate-shaped resin block precursor; placing the co-doped plate-shaped resin block between two porous graphite plates, and carrying out high-temperature treatment to obtain a glassy carbon matrix; and immersing the glassy carbon substrate into the adhesion layer solution to form an adhesion layer, transferring the adhesion layer into a deposition solution which comprises a bismuth-containing solution and a gold-containing solution, forming bismuth-gold nano-dots on the adhesion layer, and washing and drying the bismuth-gold nano-dots to obtain the plate-shaped glassy carbon electrode. Through directional arrangement of crystal orientations, the tantalum carbide coating achieves higher electrical conductivity and thermal conductivity. And the sensitivity and the service life of the plate-shaped glassy carbon electrode are obviously improved and prolonged.

According to the high-strength complex-phase hot-rolled wire rod for the 2300 MPa grade stranded wire and the manufacturing method of the high-strength complex-phase hot-rolled wire rod, after Mo-V high-carbon components are rolled and spun into the wire rod, online molten salt section quenching isothermal treatment is conducted, the wire rod is subjected to front-section molten salt treatment and cooled at the cooling speed larger than or equal to 39 DEG C / s, the wire rod enters a bainite phase region from an austenite state, and then the high-strength complex-phase hot-rolled wire rod is obtained; the method comprises the following steps: carrying out high-temperature treatment on austenite to promote part of austenite to be converted into bainite, then carrying out later-section molten salt treatment, increasing the molten salt temperature, promoting unconverted retained austenite to be decomposed and converted into sorbite, carrying out isothermal tempering, and finally carrying out roller way slow cooling to prepare the hot-rolled wire rod of which the microscopic structure comprises a complex-phase structure consisting of tempered bainite, tempered sorbite and ferrite, by means of the method, complex-phase structure regulation and control and online toughening can be achieved, the material cost and the production efficiency are both considered, the tensile strength is 1552-1602 MPa, the percentage reduction of area is 32%-38%, and therefore off-line heat treatment is avoided, and ultrahigh-strength stranded wires are efficiently produced.

The invention discloses a graded graphitization degree porous carbon material, a preparation method and application, the graded graphitization degree porous carbon material comprises an inner layer low graphitization area, a middle layer transition area and an outer layer high graphitization area from inside to outside, the preparation method comprises the following steps: S1, carbonizing a carbon source to obtain a carbon precursor, and activating the carbon precursor to obtain activated carbon; a porous carbon skeleton is obtained; and S2, under the atmosphere of H2 / Ar mixed gas, carrying out high-temperature treatment on the porous carbon skeleton to obtain the graded graphitization degree porous carbon material. The invention discloses a graded graphitization degree porous carbon material and a silicon-carbon composite negative electrode material prepared by taking the graded graphitization degree porous carbon material as a substrate, and through spatial design of the graphitization degree of the porous carbon substrate, the silicon-carbon performance is synergistically improved in the atomic scale (interlayer spacing regulation and control) and the microscale (pore structure optimization); a battery assembled by the silicon-carbon composite negative electrode material has excellent cycling stability and rate capability, and also has relatively high initial specific capacity and initial coulombic efficiency.

The invention provides the cassava low-temperature-resistant MeSR45-2 gene cloned from cassava for the first time, the expression of the MeSR45-2 gene in cassava is inhibited under low-temperature stress, and research shows that the gene can significantly improve the low-temperature resistance of cassava, reduce the malondialdehyde content, proline cumulant and the like in cassava, reduce leaf damage under low-temperature treatment and improve the yield of cassava. Terminal buds under low-temperature treatment are not affected and can normally grow, and expression of various protein genes is regulated and controlled. The invention provides a new candidate gene for research on improvement of plant low temperature resistance and the like, and also provides a new gene resource for cultivation of a new variety of low temperature resistant cassava and construction of a new variety of transgenic cassava.

The invention belongs to the technical field of porous tantalum carbide ceramic preparation, and particularly relates to a preparation method of porous tantalum carbide ceramic based on a broken framework, which comprises the following steps: S1, preparing dipping slurry; s2, a polyurethane foam template is immersed in the dipping slurry, the polyurethane foam template is fully pressed so that the holes can be filled with the slurry, and the template is repeatedly rolled through a roller till no slurry flows out of the template; s3, drying the impregnated template, performing high-temperature treatment on the dried template, and cooling to room temperature to obtain a porous tantalum carbide framework; s4, crushing the porous tantalum carbide skeleton into a crushed skeleton with the size of 0.1-5 mm; s5, preparing a phenolic resin solution, mixing the crushed framework with the phenolic resin solution, then transferring the mixture into a mold, and forming after applying a certain pressure to obtain a porous tantalum carbide green body; the crushing brackets are stacked and spliced together to form a porous structure, the pores of a finished product can be adjusted by changing the sizes of the crushing brackets, and the crushing bracket can be applied to finer pores and is extremely low in shrinkage rate.

This invention discloses a method for preparing high-reactivity blast furnace charge from magnetite concentrate with low carbon content, and the blast furnace charge itself, belonging to the field of iron and steel metallurgical technology. The method involves sequentially mixing iron-containing raw materials with an organic-inorganic composite binder, multifunctional additives, and water, followed by high-pressure roller molding and solidification to obtain the finished cold-pressed briquettes. By optimizing the particle size distribution of the raw materials and adding multifunctional additives, this method can significantly improve the strength and reducibility of the cold-pressed briquettes. The process is simple, requires no high-temperature treatment, and has low carbon emissions.

The invention discloses a system and a method for treating urban garbage based on a smoldering technology, and belongs to the technical field of urban garbage treatment. The urban garbage treatment system comprises a garbage pretreatment device; a gradient temperature control reaction bed is arranged in the center of the garbage incinerator, and gradient temperature control is achieved through air supply and water supply; the air supply device is used for conveying air to a reaction area in the garbage incinerator so as to control the proceeding degree of the smoldering reaction; a harmful flue gas incinerator; the water treatment device is arranged between the garbage incinerator and the harmful flue gas combustion furnace, after sewage generated by garbage smoldering is treated, one part of water returns into the garbage incinerator to be mixed with air to help control the temperature in the furnace, and the other part of water enters the harmful flue gas combustion furnace to be subjected to high-temperature treatment together with harmful flue gas so as to remove harmful components; the invention discloses a multi-stage gas purification device. By means of the device system, self-sustaining smoldering decomposition treatment of the municipal solid waste is achieved.

Methods and apparatuses for virtualizing building management systems. An apparatus embodiment comprises a processor that receives a temperature adjustment command from a building application via a first application programming interface (API). The command specifies a target temperature for a designated space. The processor validates the access rights of the user for the command, translates the command into one or more device-specific control parameters, and communicates these parameters to an on-premise building management system via a second API. This enables execution of the temperature adjustment to achieve the desired temperature value for the building space.

The invention belongs to the technical field of Chinese wolfberry processing, and particularly relates to a production method of fresh-locked Chinese wolfberry rich in high-value active ingredients and the fresh-locked Chinese wolfberry. According to the method, the Chinese wolfberry fruits are pretreated before vacuum drying, namely preheating is carried out, high-temperature treatment on the fresh Chinese wolfberry fruits is rapidly realized, and the influence of stress reaction and long-time heating in later drying on functional active ingredients of the Chinese wolfberry fruits is prevented by combining medium and short infrared waves and a short-time high-temperature process. The sensory quality (such as color value and meat texture) of the Chinese wolfberry is kept at a higher level, the functional active ingredients of the Chinese wolfberry are protected, and the loss of nutritional ingredients is reduced. And the fresh-locked Chinese wolfberry fruits prepared by the process disclosed by the invention are stable in quality and have good reproducibility.

The invention provides a formed foil and a preparation method thereof. The preparation method of the formed foil comprises the following steps: carrying out pretreatment on an aluminum foil, namely carrying out at least one high-temperature treatment and acid treatment on the aluminum foil; and carrying out multi-stage formation treatment on the pretreated aluminum foil. According to the invention, the hydration resistance of the formed foil can be improved, and the reliability and stability of the aluminum electrolytic capacitor can be improved.

The invention discloses a preparation method of a low-cost silicon-carbon composite material for a lithium ion battery, which comprises the following steps of: weighing raw materials including coarse silicon powder, a dispersing agent and an antioxidant in parts by mass, adding the weighed raw materials, a solvent and a grinding medium into a sand mill to obtain nano silicon slurry, sequentially adding micron-sized graphite and a conductive material, continuously dispersing at a high speed, and cooling to obtain the silicon-carbon composite material for the lithium ion battery. The preparation method comprises the following steps: preparing nano silicon-carbon precursor slurry, carrying out suction filtration on the nano silicon-carbon precursor slurry, collecting filtrate, carrying out spray drying on the filtrate to obtain nano silicon-carbon secondary particles, and then crushing and screening the nano silicon-carbon secondary particles through a vibrating screen to obtain the silicon-carbon composite material. The preparation method has the advantages that the whole preparation process is free of high-temperature treatment, the preparation cost is greatly reduced, the process steps are simple to operate, large-scale production is easy to realize, and the nano silicon-carbon composite material obtained by the method has high gram volume, excellent first charge-discharge specific capacity, excellent first coulombic efficiency and good application prospect. And the performance of the lithium ion battery is effectively improved.

The invention belongs to the field of catalyst preparation, and particularly relates to a platinum-based bimetallic propane dehydrogenation catalyst and a preparation method thereof. The method comprises the following steps: firstly, weighing beta molecular sieve powder, adding into a concentrated nitric acid solution, stirring and refluxing at high temperature, centrifugally washing, and drying to obtain a dealuminated beta molecular sieve; then calcining the metal additive oxide powder and the dealuminated beta molecular sieve in a reducing atmosphere to obtain composite beta molecular sieve powder; then weighing platinum precursor salt, dissolving the platinum precursor salt in ultrapure water to form a solution, and then adding ethylenediamine for coordination; and finally, impregnating the composite beta molecular sieve with a platinum precursor solution, and carrying out aging, drying and high-temperature treatment to obtain the dealumination beta molecular sieve loaded platinum-based bimetallic catalyst. According to the method provided by the invention, the metal is spontaneously and highly dispersed on the carrier by utilizing the capturing effect of the beta molecular sieve silanol nest on the metal and combining the dynamic migration behavior of the metal under high-temperature reduction. The prepared catalyst shows extremely high propane conversion activity and selectivity at 600 DEG C, and is excellent in stability.

A transparent, chemically prestressable or chemically prestressed glass ceramic has a high transmittance, a low haze and a high crystal phase content of keatite solid solution. A method of making such a glass ceramic includes producing a silicate green glass with a melting process and subsequent hot shaping, temperature treating the silicate green glass with at least one nucleation step carried out in the temperature range of 690° C. to 850° C. for a period of 5 min to 72 h and at least one ceramization step carried out in the temperature range of 780° C. to 1100° C. for a period of 3 min to 150 h, and performing at least one ion exchange in an exchange bath at a temperature of the exchange bath between 370° C. and 500° C. for a period of between 2 hours and 50 hours.

The application provides a preparation method of a single-atom catalyst, and comprises the following steps: (1) heat treating nitrogen-doped carbon material in an inert atmosphere to obtain a graphene-like carrier material; (2) mixing the graphene-like carrier material with a solvent, preparing a graphene-like dispersion liquid through ultrasonic treatment, and drying the graphene-like dispersion liquid in a protective atmosphere through low-temperature staged drying to obtain a foam metal-graphene-like material; and (3) performing liquid-phase ultrasonic stripping on the foam metal-graphene-like material to obtain a single-atom catalyst. Compared with the prior art, the application eliminates the high-temperature treatment of the foam transition metal in a reducing atmosphere, and compared with the traditional high-energy-consumption high-temperature (above 500 DEG C) treatment method, the method is more moderate and has lower production cost.

The invention discloses a preparation method and application of doped hierarchical porous manganese dioxide, and belongs to the field of catalyst preparation and air purification. According to the invention, potassium permanganate is used as a manganese source and an oxidizing agent, a modified reducing agent is added, mixing and stirring reaction are carried out at room temperature, and the doped hierarchical porous manganese dioxide catalyst is synthesized after washing, drying and high-temperature treatment. The preparation method is simple in preparation process and high in repeatability; the prepared manganese dioxide realizes doping of potassium ions and formation of oxygen vacancies, and the catalytic activity of the manganese dioxide is improved; the doped manganese dioxide catalyst has a multi-stage structure of micropores, mesopores and macropores, the multi-stage pore structure endows the doped manganese dioxide catalyst with a relatively large specific surface area, the physical adsorption capacity of the doped manganese dioxide catalyst can be improved, and meanwhile, more active sites are exposed, so that the doped manganese dioxide catalyst shows relatively high activity and stability in a reaction for catalytically oxidizing gaseous pollutant formaldehyde at room temperature.

This invention discloses a nano-Fe3C particle composite carbon-based conductive film and its preparation method. This invention utilizes the Joule heat generated by energizing the carbon-based conductive film to subject the iron-containing raw material loaded thereon to high-temperature treatment, causing it to react with the carbon-based conductive film, thereby producing a carbon-based conductive composite film uniformly loaded with Fe3C nanoparticles. This invention replaces the traditional heating process in a tube furnace or box furnace with Joule heat generated by energizing a nano-carbon-based macrofilm with rapid temperature rise and fall characteristics. The entire process offers the advantages of simple steps, rapid synthesis, and low energy consumption.

The application discloses a modification method of waste tire thermal cracking carbon black and the obtained carbon black. The method comprises the following steps: (1) high-temperature treatment of thermal cracking carbon black; (2) adding the thermal cracking carbon black after high-temperature treatment in step (1) into an acid solution, stirring to obtain an acid washing thermal cracking carbon black water suspension, and drying after water washing to obtain acid washing thermal cracking carbon black; and (3) mixing the acid washing thermal cracking carbon black obtained in step (2) with a silane coupling agent and performing heat treatment to obtain modified thermal cracking carbon black. The modification method reduces the ash content of the thermal cracking carbon black, enhances the surface activity of the thermal cracking carbon black, improves the reinforcing performance of the thermal cracking carbon black in rubber, increases the use amount of the thermal cracking carbon black, and makes the thermal cracking carbon black have a wider application.

The invention relates to the technical field of lithium ion battery negative electrode materials, in particular to a preparation method of a silicon-carbon composite negative electrode material with improved safety, which comprises the following steps: (S1) reacting a first phenol monomer, a second phenol monomer and an aldehyde monomer, sequentially curing twice to obtain a phenolic resin block, and sequentially crushing, pre-oxidizing, pyrolyzing and carbonizing to obtain a silicon-carbon composite negative electrode material; pyrolytic carbon is obtained; the second phenol monomer is cardiac phenol; (S2) carrying out activated pore-forming on the pyrolytic carbon, and carrying out high-temperature treatment in an inert atmosphere to obtain porous carbon; and (S3) sequentially performing vapor phase silicon deposition and carbon coating on the porous carbon to obtain the silicon-carbon composite negative electrode material. By adjusting a monomer formula and a secondary curing process in resin synthesis, regulation and control on the hybridization degree of SP3 and SP2 are realized, the crosslinking degree and mechanical strength of the resin are improved, the defects of a porous carbon substrate are reduced, and a silicon-carbon negative electrode material with a certain grain size can be prepared during later-stage deposition; the high performance of the silicon-carbon negative electrode material is maintained, and the silicon-carbon negative electrode material also has higher safety.

The invention provides a special fiber material and a preparation method thereof, and belongs to the technical field of polymer composites.The preparation method comprises the following steps that cellulose and an ethanol solution are mixed, polyvinyl alcohol and a 3-glycidoxypropyltrimethoxysilane solution are added, the pH is adjusted to be acidic, heating, suction filtration and drying are conducted, and modified cellulose is obtained; mixing expanded graphite, deionized water, ammonium persulfate and dilute sulphuric acid, heating, cooling, dropwise adding amino polyethylene glycol silane, heating, washing and drying to obtain modified expanded graphite; the preparation method comprises the following steps: mixing modified cellulose, modified expanded graphite, phosphate montmorillonite, 3-(methacryloyloxy) propyltrimethoxysilane, bisphenol A diglycidyl ether and 2-methylimidazole, stirring, heating, defoaming, and carrying out two-stage constant-temperature treatment to obtain the special fiber material. The special fiber material disclosed by the invention has good flame retardance, mechanical strength, water resistance and filtering performance, and can be applied to various organic composite boards, filter membranes and the like with high quality requirements.

The utility model discloses a device for puncturing a cotton piece, which comprises a rack and a controller, and a humidifying chamber, a high-pressure chamber and a drying chamber are arranged on the rack. According to the device, a traditional needling technology is abandoned, high-pressure air is adopted as a medium, when a humidified cotton piece passes through a high-pressure chamber, the cotton piece is punctured through the high-pressure air sprayed out of a high-pressure box, and double-face puncturing of the cotton piece is achieved through the special space layout of a first conveying mesh belt and a second conveying mesh belt; strong pressure enables fibers on the surface of the cotton piece to move to the deep layer of the cotton piece, fibers in the fiber web are mutually entangled, the tension of the cotton piece is improved, the cotton piece is finally subjected to air high-pressure puncture and high-temperature treatment, the shape of the formed cotton piece is changed, the cotton fiber reaches ideal throwing degree, the tension reaches the required standard, and meanwhile, due to no strong intervention of physical felting needles, the cotton piece can be well fixed. And the fluffy feeling of the surface of the cotton piece cannot disappear.

The invention discloses a low-temperature cold-extraction slow-distillation extraction system and method for honeysuckle juice, and relates to the technical field of honeysuckle juice extraction. A vacuum slow distillation stage; a low-temperature purification stage; a fermentation stage and a blending stage; according to the method, low-temperature cold extraction is combined with vacuum gradient slow distillation, degradation of heat-sensitive components such as chlorogenic acid and galuteolin is effectively reduced, and the retention rate of the heat-sensitive components is greatly increased; components with different boiling points are collected by stages through gradient distillation, the extraction rate of functional components such as polysaccharide and flavone is increased, and the problem of component loss caused by a traditional high-temperature process is solved. Low-temperature treatment retains more natural aroma substances, gradient distillation makes the aroma level of the product richer, and the flavor is better than that of the original process; the filtration and alcohol precipitation treatment in the low-temperature purification stage significantly improves the clarity qualification rate of the finished product, and ensures the appearance quality of the product. Distillation residues and mother liquor filter residues are fermented by bacillus subtilis to produce enzyme primary pulp, the comprehensive utilization rate of raw materials is greatly increased, and resource circulation is achieved.

The invention relates to the field of semiconductors and piezoelectric materials, in particular to a method for improving bonding strength of a lithium tantalate wafer, which comprises the following steps: a) thinning, polishing and cleaning the lithium tantalate wafer; b) cleaning the substrate slice with a weakly alkaline solution and then immediately cleaning the substrate slice with a cooling water bath; c) carrying out step-by-step cooling treatment on the substrate slice and then storing at constant temperature; d) carrying out surface activation on the lithium tantalate wafer and the substrate slice by using plasma; e) aligning the lithium tantalate wafer and the substrate slice, and pressurizing and bonding to obtain a bonded slice; and f) inspecting the bonding sheet. By optimizing the lithium tantalate wafer thinning and polishing process and the substrate slice low-temperature treatment process, the problems of edge tilting and surface roughness of the lithium tantalate wafer, self defects of the substrate slice and poor bonding caused by difference of thermal expansion coefficients of a functional layer and a substrate layer during bonding are effectively solved, and high-strength, high-precision and high-stability bonding is realized.