666 results about "Borax" patented technology

The invention discloses a fluoride salt-free nitrate-free cast iron enamel semitransparent glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, sodium carbonate, potassium carbonate, calcium carbonate, potassium feldspar, zinc oxide, lithium carbonate, zirconium silicate, titanium dioxide, aluminum oxide, trisodium phosphate, antimony oxide, magnesium carbonate and barium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for cast iron matrixes, the firing temperature is 740-760 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention relates to the technical field of compound fertilizers, and provides a slow-release compound fertilizer for corn and a preparation method of the slow-release compound fertilizer. The fertilizer is prepared from the following raw material components: 35 to 40 parts of thermoplastic resin coated urea, 400 to 450 parts of potassium chloride compound fertilizer, 200 to 300 parts of humic acid coated urea, 10 to 12 parts of zinc sulfate, 30 to 45 parts of large granular urea, 100 to 150 parts of microencapsulated bacillus subtilis granules and 10 to 15 parts of polylactic acid coated borax. According to the invention, borax is coated by a polylactic acid coating technology, so that the release speed of the boron element is effectively delayed, the boron element is ensured to be continuously released from the elongation stage of corn to the large bell mouth stage (20-30 days after sowing), and the problem of premature loss of the boron element in the prior art is solved.

The present invention relates to a composite high-temperature proton exchange membrane, a preparation method thereof, and an application thereof. The preparation method of the composite high-temperature proton exchange membrane comprises the following steps: S1. Mix a polymer represented by formula (I), a polymer represented by formula (II), and a solvent to obtain a casting solution, pour it, and dry it to obtain a composite film; S2. Immerse the composite film obtained in step S1 in an alkaline solution of borax, wash it, dry it, and then adsorb phosphoric acid to obtain the composite high-temperature proton exchange membrane. The composite high-temperature proton exchange membrane prepared by the preparation method of the present invention still maintains good proton conductivity / has high proton conductivity, has a high peak power density, and has high tensile strength and high phosphoric acid retention rate under the condition of low phosphoric acid adsorption amount.

The invention belongs to the field of material protection, and particularly relates to a method for improving spraying efficiency and adhesive force by adding a binder in the plasma spraying process. The binder comprises one or more of bentonite, silicon dioxide, borax, sodium silicate and aluminum phosphate. The device has the function of quickly melting spraying particles at high temperature and adhering the spraying particles to a spraying substrate, so that the powder spraying efficiency is improved, and the production efficiency is improved. The method comprises the following steps: firstly, carrying out sand blasting treatment on a spraying base material, removing dust and impurities on the surface to enable the roughness to reach 8-10 microns, weighing, and measuring the surface area to be sprayed; and then weighing the binder and putting the binder into a drying oven to be dried at 120 DEG C; the method comprises the following steps: uniformly mixing a binder and an analytically pure nano spraying material according to a certain proportion, and pouring into a plasma spraying raw material tank; and spraying is carried out at the position with the voltage of 30-50 V, the current of 300-600 A, the air pressure of 8 Mpa and the distance of 80-120 mm. The spraying time is 3-5 min, and after spraying is completed, the powder spraying amount is calculated by weighing the mass difference of the base material before and after the base material is weighed. And by adding the binder, the powdering rate is increased from 30.79% to 51.24%, the consumption of spraying materials is greatly reduced, and the working efficiency is improved.

The invention discloses fluoride-salt-free and nitrate-free medium-temperature semitransparent glaze for steel plate enamel as well as a preparation method and application of the medium-temperature semitransparent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, potassium feldspar, anhydrous borax, sodium carbonate, titanium dioxide, monopotassium phosphate and zinc oxide according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 800-840 DEG C and the firing time of 20-30 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses fluoride-salt-free and nitrate-free high-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 840-880 DEG C and the firing time of 820-830 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses a saline-alkali soil improvement and disease resistance double-effect controlled release fertilizer and a preparation method thereof. The fertilizer comprises 18-22% of biochar, 12-18% of furfural residues, 8-12% of cow dung compost and 6-10% of potassium humate. 5-7% of aluminum sulfate, 4-6% of sulfur and 3-5% of zeolite; the microbial inoculum comprises the following components in percentage by weight: 1.5 to 2.5 percent of saline-alkaline bacillus, 0.8 to 1.2 percent of bacillus subtilis and 0.8 to 1.2 percent 8-12% of a sodium polyacrylate coating, 4-6% of a sulfur coating and 1-3% of polyglutamic acid; 0.8 to 1.2 percent of humic acid chelated iron, 0.8 to 1.2 percent of algal polysaccharide and 0.8 to 1.2 percent of urease inhibitor; 0.8 to 1.2 percent of zinc sulfate, 0.5 to 1.0 percent of manganese sulfate and 0.5 to 1.0 percent of borax. The fertilizer can reduce the pH and conductivity of soil, increase the organic matter content of the soil and effectively improve the physicochemical properties of the soil, meanwhile, by adding the microbial agent, the disease resistance of crops can be effectively improved, the morbidity and disease index of the crops can be reduced, and nutrient release of the fertilizer has a sustained and controlled release characteristic; the initial release rate and the cumulative release rate of nitrogen are both lower than those of common chemical fertilizers, and the cumulative release rate of nitrogen is moderate within 60 days, so that the nutrient requirements of crops in different growth stages can be met.

The preparation method of the rare earth antibacterial glaze comprises the following steps: mixing 30-48 parts by mass of quartz sand, 20-35 parts by mass of borax, 25-35 parts by mass of feldspar powder and 10-25 parts by mass of zinc oxide into a ball mill for ball milling, sieving the ball-milled material, and drying to obtain powder A; mixing 0.5-3 parts of lanthanum oxide, 0.5-2 parts of cerium oxide and 100 parts of powder A into a ball mill for ball milling, and sieving and drying the ball-milled material to obtain powder B; melting the powder B at 1350-1400 DEG C to obtain a glaze melt, taking out the glaze melt, tabletting, and cooling to obtain a glaze frit; and carrying out ball milling on the glaze frit until the particle size is less than 20 microns, slowly heating to 650-700 DEG C, and carrying out heat preservation for 25-30 minutes to obtain the rare earth antibacterial glaze. The ceramic prepared from the rare earth antibacterial glaze has broad-spectrum antibacterial performance, inhibits the breeding of microorganisms such as bacteria and fungi, and reduces the infection risk.

The invention relates to the technical field of concrete admixtures, and discloses a hydration temperature rise inhibitor special for mass concrete and a preparation method of the hydration temperature rise inhibitor. Comprising the following raw materials in parts by weight: 95 to 105 parts of borax, 50 to 60 parts of triethanolamine, 90 to 110 parts of gluconate, 190 to 200 parts of polycarboxylic acid and 95 to 105 parts of carboxyl-terminated hyperbranched polyester. According to the invention, by adopting the admixture to reduce hydration heat and prolong final setting time, the defects of large and concentrated heat release of common concrete and complex process, high cost and poor structural integrity of the traditional construction technology can be overcome, the problem of easy generation of temperature cracks in mass concrete is solved, the construction complexity is reduced, and the construction efficiency is improved. And the cracking phenomenon of mass concrete is improved, and the technical purposes of low cost, high efficiency and high adaptability are achieved.

The invention discloses fluoride salt-free and nitrate-free low-temperature matte glaze for steel plate enamel as well as a preparation method and application of the low-temperature matte glaze, and belongs to the technical field of enamel. The matte glaze is prepared from quartz, borax pentahydrate, sodium carbonate, titanium dioxide, magnesium oxide, monopotassium phosphate, calcium carbonate, zinc oxide, magnesium carbonate, lithium carbonate, aluminum oxide and zirconium silicate according to a specific mass ratio. The preparation method comprises the following steps: mixing the raw materials, melting at 1300 + / -10 DEG C in a pure oxygen environment, and quenching after wiredrawing to detect a molten state. The matte glaze completely avoids the use of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are eliminated from the source, the fluorine content of the product is not detected through detection, and the limit value requirements of European Union REACH regulations are met. Zinc oxide and ZnO / TiO2 are added, so that the liquid phase viscosity is reduced, ion diffusion is accelerated, and the opacity (opacification performance) and gloss of the porcelain glaze are enhanced.

The invention discloses a fluoride-salt-free and nitrate-free cast iron enamel zirconium white glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The zirconium white glaze is prepared from quartz, borax pentahydrate, magnesium carbonate, potassium carbonate, potassium feldspar, zinc oxide, aluminum hydroxide, calcium carbonate, zirconium silicate, sodium tripolyphosphate and lithium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The zirconium white glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, and meanwhile, the zirconium white glaze has good porcelain surface, luster and firing adaptability, is suitable for cast iron matrixes, has the firing temperature of 740-760 DEG C and the firing time of 87-87 hours, and can be widely applied to cast iron substrates. The method can be used for producing green and environment-friendly enamel products.

The invention relates to a water-resistant magnesium phosphate cement-based material which comprises the following components: magnesium oxide, a composite phosphate compound, borax, a sodium silicate solution, water, a polyethylene glycol derivative, polyacrylamide and an ammonium sulfate solution. According to the water-resistant magnesium phosphate cement-based material, precipitation of water can be controlled in the preparation process, so that the speed of a hydration reaction is conveniently controlled, and the situation that phosphate is fixed in a matrix and cannot continue to participate in the reaction due to the fact that the hydration reaction is too fast is avoided; according to the water-resistant magnesium phosphate cement-based material, the fluidity of a mixture can be better in the preparation process, so that the mixture can be stirred and mixed more sufficiently, and the polyethylene glycol derivative can introduce bubbles to block capillary pore channels in concrete; therefore, permeation of external water can be reduced in the using process of the water-resistant magnesium phosphate cement-based material.

The invention discloses a double-liquid magnesium phosphate early-strength high-strength grouting material and a preparation method thereof.The grouting material is composed of a liquid A and a liquid B. The liquid A is composed of powder A and water in parts by weight and comprises dead burned magnesia powder, a defoaming agent, steel slag powder, a retarder I and water, and the liquid B is composed of powder B and water in parts by weight and comprises powder B and water in parts by weight. Wherein the monopotassium phosphate, the superfine powder, the polymer rubber powder, the retarder II and the water have the advantages that the stirring time is shortened, the setting time is controllable, the flowability is good, the repair requirement can be met more quickly, the construction period is shortened, and the cane sugar and the borax are used as the retarders, so that the setting time can be controlled, and the early strength can be improved; surplus phosphate in a grouting material matrix is consumed by using the steel slag powder, so that some amorphous gel products can be generated, and the mechanical property is improved; the redispersible latex powder is utilized to form a polymer film in the slurry to wrap a hydration product, so that the water resistance is improved, and the synergistic modification effect is achieved.

The invention relates to the technical field of electrode paste, in particular to electrode paste for a submerged arc furnace and a preparation method of the electrode paste. Comprising three-level grain size distribution anthracite aggregate which is electrically calcined at high temperature and modified by a KH-550 silane coupling agent, a modified silicon carbide whisker and boron-doped graphene-like carbon nitride composite filler, a maleic anhydride-mediated compatible medium-temperature pitch-polyborosiloxane binder and a graphite powder-borax functional additive. A step-by-step mixing and two-stage sintering process is adopted in the preparation process, a covalent bond interface bridging structure is constructed through the coupling agent, the composite dispersing agent regulates and controls the multi-dimensional network distribution of the filler, and the process synergistically improves the compactness and the interface bonding force of the green body. The electrode paste is firm in interface bonding, can form a ceramic protective phase at a high temperature, has excellent conductivity and mechanical strength, and prolongs the service life of the electrode paste for the submerged arc furnace.

The invention discloses a preparation method of salt-resistant sodium carboxymethyl cellulose, and relates to the technical field of petroleum fracturing materials. The preparation method comprises the following steps: reacting stearic acid with ethylenediamine to obtain a monosubstituted intermediate, reacting the monosubstituted intermediate with cocoyl chloride to obtain an intermediate 1, reacting the intermediate 1 with epoxypropane to obtain an intermediate 2, and reacting the intermediate 2 with paratoluensulfonyl chloride to obtain a hydrophobic intermediate; reacting a sodium carboxymethyl cellulose solution with the hydrophobic intermediate to obtain modified sodium carboxymethyl cellulose, and sulfonating the modified sodium carboxymethyl cellulose with sulfamic acid to obtain crude salt-tolerant sodium carboxymethyl cellulose; and reacting the crude product salt-resistant sodium carboxymethyl cellulose with borax to obtain the salt-resistant sodium carboxymethyl cellulose. The salt-resistant sodium carboxymethyl cellulose prepared by adopting a step-by-step synthesis strategy has excellent salt resistance, temperature resistance, shearing resistance and dissolution rate, and is suitable for thickening and sand carrying of high-temperature and high-salt oil and gas field fracturing fluid.

The invention relates to the technical field of ceramics, in particular to mottle crack glazed ceramic and a preparation method thereof.The ceramic comprises a green body, ground glaze and cover glaze, and the ground glaze is prepared from, by weight, 30-35 parts of kaolin, 25-30 parts of quartz, 20-25 parts of feldspar, 8-12 parts of ferric oxide, 5-8 parts of calcium carbonate and 3-5 parts of borax; the cover glaze is prepared from the following raw materials in parts by weight: 35 to 40 parts of feldspar, 25 to 30 parts of quartz, 6 to 10 parts of copper oxide, 5 to 8 parts of granular rock powder, 8 to 12 parts of borax and 5 to 8 parts of clay. Embedding porous particles into the green body to initiate explosion cracks, and fusing interlayer stress cracks and devitrification cracks to form a multi-stage composite crack network; iron ions in the ground glaze and copper ions in the cover glaze form ion gradient migration through the iron axe stone powder in the middle layer to generate red and green blended stripes; the microcapsule carbon powder regulates and controls the pores and texture of the glaze, and copper foil fragments are oxidized and reduced to form gilding-brown mottles.

The invention discloses fluoride-salt-free and nitrate-free low-temperature pearlescent glaze for steel plate enamel as well as a preparation method and application of the pearlescent glaze, and belongs to the technical field of enamel. The pearlescent glaze is prepared from quartz, anhydrous borax, titanium dioxide, magnesium carbonate, sodium tripolyphosphate, potassium carbonate, lithium carbonate, potassium feldspar, zinc oxide and V-26 according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The pearlescent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the pearlescent glaze has good porcelain surface, luster and low-temperature firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 760-800 DEG C and the firing time of 10-20 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses fluoride-salt-free and nitrate-free low-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for steel plate substrates, the firing temperature is 760-800 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention relates to the technical field of ceramic materials, and discloses a preparation process for producing hexagonal boron nitride by a low-temperature method, which comprises the following specific steps: mixing borax and urea according to a certain mass ratio, and adding into a ball mill for ball milling to obtain a material A with uniform particle size; adding a modified material with a proper mass ratio into the material A, and continuing ball milling to uniformly disperse the modified material to obtain a material B; transferring the material B into a tubular furnace into which high-purity ammonia gas is introduced, heating to about 900 DEG C at a proper rate, and preserving heat for several hours to complete the reaction; and after the reaction is completed, cooling along with the furnace, washing the product with deionized water until the product is neutral, sieving with a 300-mesh sieve, and carrying out vacuum drying at 70-90 DEG C for a certain time to finally prepare the high-crystallinity hexagonal boron nitride. According to the process, boron-nitrogen reaction kinetics is promoted through the modified material, generation of cubic boron nitride impure phases is inhibited, compared with a traditional high-temperature method, energy consumption is remarkably reduced, product purity and crystallinity are improved, and the process is suitable for large-scale production.

The invention discloses micron-sized pearl glaze ceramic and a preparation method thereof, and relates to the technical field of ceramic, and the micron-sized pearl glaze ceramic is characterized by comprising a ceramic body, a toning ground coat layer and a dry particle layer, the toning ground coat layer is prepared from the following raw materials in parts by weight: 15 to 25 parts of quartz, 20 to 30 parts of feldspar, 5 to 10 parts of kaolin, 3 to 8 parts of calcined zinc oxide, 5 to 10 parts of calcium carbonate, 8 to 15 parts of barium carbonate, 8 to 15 parts of zirconium silicate, 0.05 to 0.5 part of toning metal oxide and 1 to 3 parts of functional additive; the dry particle layer is prepared from the following raw materials in parts by weight: 30 to 40 parts of quartz sand, 10 to 15 parts of borax, 5 to 8 parts of sodium carbonate, 3 to 6 parts of lithium carbonate, 10 to 18 parts of Bi2O3, 10 to 18 parts of TiO2, 0.5 to 2 parts of rare earth oxide and 0.5 to 2 parts of nucleating agent. The prepared ceramic shows soft and layered pearl luster under light rays of different angles, and the physical performance is greatly improved.

The invention discloses in-situ shell-glue type geopolymer porous concrete and a preparation method thereof.The preparation method comprises the following steps that S1, fly ash, quartz sand, cement, lime, gypsum, borax, a water reducing agent and a foam stabilizer are mixed, and a first mixture is obtained; mixing sodium hydroxide with part of the mixing water to obtain alkali liquor, and adding floating beads into the alkali liquor to obtain a second mixture; mixing the aluminum powder, the nano aluminum hydroxide and the rest of the mixing water to obtain a third mixture; s2, mixing the first mixture and the second mixture, then adding a third mixture, and uniformly stirring to obtain slurry; s3, the slurry is injected into a mold and then coated with a film, then pre-curing treatment is carried out, demolding is carried out after pre-curing is finished, and a pre-product is obtained through cutting; and S4, performing autoclaved curing on the pre-product to obtain the in-situ shell-glue type geopolymer porous concrete. The in-situ shell-glue type geopolymer porous concrete with low heat-conducting property and high compressive property can be obtained.

The invention relates to the technical field of enzyme-linked immunosorbent assay, and discloses a quality control serum diluent as well as a preparation method and application thereof, and the quality control serum diluent is prepared from the following raw materials: boric acid, borax, sodium caseinate, liquid gelatin, aminopyrine, an osmotic pressure stabilizer and bovine serum. The quality control serum diluent prepared by adopting the formula has no potential interfering substances (such as formaldehyde and thiomersalate), has excellent thermal stability and long-term stability, is applied to quality control serum dilution, is beneficial to improving the detection accuracy, ensures that the characteristics of the diluent meet the requirements when the diluent is used every time, and provides stable reference data for the detection process.

The invention provides a zinc-copper-nickel-copper smelting deslagging agent and a preparation method and a use method thereof. The zinc-copper-nickel-copper smelting deslagging agent comprises the following raw materials in percentage by mass: 5-15% of calcium fluoride, 20-30% of sodium carbonate, 5-15% of sodium fluoride, 10-20% of sodium hexafluoroaluminate and the balance of borax. Compared with the prior art, the zinc-copper-nickel-copper slag remover prepared by mixing the raw materials can effectively reduce impurities to be less than 0.14% of Fe, less than 0.005% of Pb and less than 0.003% of Si in the smelting process, the impurity components are obviously reduced, the number of times of component adjustment and unqualified sampling is reduced, impurities mixed in a casting blank are reduced, and finally the metal purity and the casting quality are improved. Meanwhile, loss of zinc and nickel is reduced to the maximum extent; and adverse effects on the zinc-copper-nickel alloy are avoided.

The invention belongs to the technical field of organic synthesis, and particularly relates to a pyroxasulfone preparation method which specifically comprises the following steps: dissolving 3-(5-difluoromethoxy-1-methyl-3-trifluoromethyl-1H-pyrazol-4-ylmethylthio)-5, 5-dimethyl-2-isoxazoline serving as a raw material with a solvent, then adding a boron compound, finally dropwise adding hydrogen peroxide, and reacting at room temperature to obtain the pyroxasulfone. Reacting for several hours to obtain pyroxasulfone; the adopted boron compound is cheap and easy to obtain, so that the use of a transition metal catalyst is avoided, and the raw material cost is reduced; organic acid reagents with heavy odor are not used, waste water and solid waste are less, and the method has great advantages in the aspect of environmental protection; the method is simple to operate, free of complex treatment steps and suitable for industrial production, and when the boron compound is selected from sodium metaborate, sodium perborate or a mixture of borax and sodium metaborate, the yield and purity of the process are higher, and sulfoxide impurities are fewer.

The invention belongs to the technical field of hydrogel preparation, and discloses a biocompatible self-healing photocuring hydrogel and a preparation method and a use method thereof.The biocompatible self-healing photocuring hydrogel is prepared by adding an ultraviolet light initiator and sodium chloride into a polyvinyl alcohol aqueous solution, evenly mixing, then adding acryloyl glycinamide powder to enable the acryloyl glycinamide powder to be dissolved, then adding a crosslinking agent, and evenly mixing to obtain the biocompatible self-healing photocuring hydrogel. Adding water into the mixed solution, then removing bubbles, then adding methacrylated gelatin and dissolving, and then removing bubbles to obtain a biocompatible self-healing photocuring hydrogel mixed solution; adding a borax solution prepared from sodium tetraborate and deionized water into the obtained biocompatible self-healing light-cured hydrogel mixed solution, and after the biocompatible self-healing light-cured hydrogel mixed solution and the borax solution are subjected to cross-linking reaction, removing bubbles to obtain the biocompatible self-healing light-cured hydrogel. The biocompatible self-healing photocuring hydrogel has excellent mechanical properties and self-healing ability, and is suitable for application scenes such as biosensing, wound repair and tissue engineering.

The invention provides alkali-activated mortar based on a low-carbon composite excitation system and a preparation method of the alkali-activated mortar, and belongs to the technical field of low-carbon mortar preparation. Raw materials of the alkali-activated mortar based on the low-carbon composite activation system comprise a low-carbon composite solid activator, a precursor and a fine aggregate, the low-carbon composite solid activator comprises borax, anhydrous sodium silicate and sodium carbonate / sodium sulfate, the modulus of the anhydrous sodium silicate is 1.0-1.75, the doping amount of the borax is 0.5-1.5 Na2O%, the doping amount of the sodium carbonate or sodium sulfate is 0.375-1.5 Na2O%, and the doping amount of the fine aggregate is 0.5-1.5 Na2O%. The water-binder ratio is 0.38, the total alkali consumption is 5Na2O%, and the sand-binder ratio is 0.4. By optimizing a solid alkali activator system, the problems that a traditional alkali-activated material is poor in working performance, unbalanced in mechanical property, insufficient in volume stability, poor in environment-friendly economy and the like are solved, and a feasible path is provided for engineering application of a high-performance low-carbon alkali-activated cementing material.

The invention relates to the field of corrugated paper preparation, in particular to moisture-proof and mildew-proof corrugated paper and a preparation method thereof. The composite board comprises a board core located in the center and paper layers located on the two sides of the board core. A moisture-proof and mildew-proof bonding layer is arranged between the board core and the paper layer; a moisture-proof and mildew-proof protective layer is arranged on the outer side of the The moisture-proof and mildew-proof bonding layer is obtained by coating a bonding agent; the adhesive comprises activated carbon powder, kaolin, water, hydrogen peroxide, potassium permanganate, starch, caustic soda, borax, a defoaming agent and a special drying catalyst; the moisture-proof and mildew-proof protective layer is obtained by coating a protective agent; the protective agent is prepared from activated carbon powder, kaolin, paraffin, dimethyl silicone oil, absolute ethyl alcohol, tetrabutyl titanate, an emulsifier OP-10, polysorbate-80, an acetic acid solution, styrene-acrylic emulsion, a film-forming agent, a dispersing agent and a preservative. On the basis of the original performance, multi-layer moisture-proof and mildew-proof effects are further achieved, the quality of the corrugated paper is improved, objects contained in the corrugated paper are protected, the strength of the corrugated paper is enhanced, and the service life of a carton is prolonged.

According to the low-temperature high-durability magnesium phosphate cement and the preparation method thereof, dead burned magnesia powder serves as a core gelling base material and can provide a large amount of active Mg < 2 + >, ammonium dihydrogen phosphate can provide an acid environment and PO4 < 3->, the dead burned magnesia powder and the ammonium dihydrogen phosphate are subjected to an acid-base neutralization reaction in the presence of water to generate ammonium magnesium phosphate hydration products, and the magnesium phosphate hydration products are subjected to a low-temperature high-durability magnesium phosphate cement. The products are interwoven to form a hardened body framework, and a strength foundation is laid for cement; borax is adopted as a key retarder, borate ions generated after the borax is dissolved in water can be adsorbed on the surfaces of dead burned magnesia powder particles, a magnesium borate complex film is formed, the dissolution of Mg < 2 + > and the reaction of PO4 < 3-> are hindered, the cement setting time is effectively delayed, and the construction requirements are met; and the borax can also refine the crystal structure of a hydration product, reduce the porosity, improve the impermeability and the volume stability of a hardened body, and avoid shrinkage cracking.

The utility model discloses a device for improving the quality of the inner surface of a hot-rolled seamless steel pipe, which comprises a track filling device, the track filling device comprises a transportation track and a movable filling device arranged on the transportation track, the filling device is a movable mechanical arm, the track filling device is adjacent to a secondary punching device, and the secondary punching device is connected with the transportation track. The tubular billet perforated by the secondary perforating equipment is transferred to the tubular billet rotating device through the transferring device, the tubular billet rotating device is arranged on the borax blowing station, and the tubular billet rotating device of the borax blowing station comprises two or more sets of rotating carrier rollers used for supporting the tubular billet to rotate on the rotating carrier rollers. A borax nozzle is arranged at the rear upper position of the middle side of the two rotating carrier rollers on the outer side, a rotary arm is further arranged on the outer side of the borax injection station, and a conveying driving device is arranged on the side close to the rotary arm.

The invention relates to the technical field of graphene modification, and particularly discloses a preparation method of zinc borate modified graphene, which comprises the following steps: ultrasonically dispersing graphene in water to obtain 0.5-1g / L graphene dispersion liquid; adding a dispersing agent, a 0.08-0.12 mol / L borax aqueous solution and ethanol into the graphene dispersion liquid, uniformly mixing, and then dropwise adding a 0.08-0.12 mol / L zinc sulfate aqueous solution under the stirring action; then carrying out a reaction through microwave heating at the temperature of 50-70 DEG C under the power of 100-300 W for 20-30 min; after the reaction is finished, filtering, washing and drying to obtain zinc borate modified graphene. According to the preparation method of the zinc borate modified graphene, provided by the invention, a uniform, complete and compact shell layer can be formed on the surface of the graphene through in-situ self-assembly, so that the surface of the graphene is textured, and the dispersion uniformity and dispersion stability of the graphene in an oil phase system are improved.