52results about How to "Available for mass production" patented technology

The invention provides an inorganic ion doped carbon nitride photocatalyst and a preparation method thereof. The inorganic ion doped carbon nitride photocatalyst has a molecular formula shown in a formula (I). The preparation method comprises the following steps of: sufficiently mixing carbon and nitrogen sources and inorganic salt in a water solution, then drying and calcining to obtain the inorganic ion doped carbon nitride photocatalyst which has the molecular formula shown in the formula (I). According to the photocatalyst, inorganic ions enter a crystal lattice or an interlayer of C3N4, and visible-light catalytic activity of the C3N4 photocatalyst provided by the invention is greatly enhanced through the doping of the inorganic ions. Experiments indicate that the visible-light catalytic activity of the inorganic ion doped C3N4 photocatalyst with a two-dimensional structure is 1.5-3 times higher than that of a photocatalyst without C3N4 doped. Besides, the preparation method provided by the invention is moderate in condition, easy to operate and favorable to large-scale production.

The invention discloses a method for preparing a three-dimensional porous graphene material by solution. The method comprises the following steps of: immersing a three-dimensional porous template into a graphene oxide solution, and then depositing the graphene oxide on the template to realize three-dimensional assembling of the graphene oxide on the template, and then preparing the three-dimensional porous graphene material containing the template by reduction; removing the template from the three-dimensional porous graphene material containing the template, and then washing to obtain the three-dimensional porous graphene material. The aperture of the three-dimensional porous graphene material can be regulated and controlled by using the templates with different apertures the material prepared by the invention has the advantages of low density, high specific surface area, high heat conductivity, high-temperature resistance, and corrosion resistance; the preparation method is economical and simple and suitable for large-scale production. And the prepared material is applicable to aspects such as catalytic carriers, preparation of flexible conductors, and stretchable electronics.

The invention discloses a composite lithium metal negative electrode based on an MXene aerogel and a synthesis method thereof, which belong to the field of lithium batteries. The composite lithium metal negative electrode comprises metal lithium and the MXene aerogel, wherein the MXene aerogel is assembled by cross-linking of two-dimensional MXene sheets and has a three-dimensional hierarchical porous structure; the MXene aerogel pores are filled with the metal lithium; and the thickness of the MXene aerogel is 300 mum to 800 mum. According to the composite lithium metal negative electrode prepared in the invention, rich pro-lithium functional groups on the surface of the MXene aerogel can be specifically combined with the lithium ions, uniform nucleation of lithium is thus realized, formation of lithium dendrites is suppressed, and the coulombic efficiency, the safety and the cycle life of the lithium metal negative electrode are effectively improved.

The invention provides a method of improving buried resistance printed wire board resistance precision. The method of improving the buried resistance printed wire board resistance precision comprises the following steps: (1) supplying a board with a buried resistance layer, wherein the board with a buried resistance layer comprising an insulating medium layer, the buried resistance layer and a copper foil layer, (2) attaching a first light resistance film, proceeding a first time exposure, printing a circuit figure of a negative film on the first light resistance film, proceeding a first time develop, the circuit figure comprising a resistance circuit and a normal circuit, increasing 6 mil to a long side unilateral of circuit width of the resistance circuit, and increasing 1.25 mil to a broadside unilateral of circuit width of the resistance circuit, (3) proceeding a first time etching and a second time etching, (4) attaching a second light resistance film, proceeding a second time exposure, printing a circuit figure of a positive film on the second light resistance film, proceeding a second time develop, reducing 0.6 mil to a long side unilateral of circuit width of the resistance figure, and increasing 6 mil to a broadside unilateral of circuit width of the resistance figure, (5) proceeding a third time etching, and (6) proceeding brown oxide processing, controlling micro etching amount between 1.3-1.7um,proceeding a -17% extra compensation to the resistance figure of the positive film.

The invention discloses a grass carp reovirus S11 gene eukaryotic expression recombinant plasmid preparation method and application thereof in serving as nucleic acid vaccine, and belongs to the technical field of gene engineering and molecular immunology. The preparation method disclosed by the invention is characterized by comprising the steps of extracting viral genome RNA, performing reverse transcription to convert the viral genome RNA into cDNA, amplifying a corresponding DNA sequence out, constructing the DNA sequence to pcDNA-3.1(+) plasmid, converting Escherichia coli DH5alpha, screening out positive clone bacteria containing recombinant plasmid, culturing a lot of the positive bacteria and extracting recombinant plasmid S11-pcDNA3.1 contained in the bacteria. The recombinant plasmid is utilized as nucleic acid vaccine to perform intramuscular injection on the grass carps, and the nucleic acid vaccine enters the muscle cells and expresses VP35 protein of the grass carp reovirus in the muscle cells; thus, fish body immune cell proliferation is stimulated, antiviral related gene expression is up regulated, fish bodies are stimulated to generate antiviral antibodies, and capability of grass carps in resisting grass carp reovirus infection is effectively improved; furthermore, the grass carp reovirus S11 gene eukaryotic expression recombinant plasmid can be used for preventing a grass carp hemorragic disease caused by the grass carp reovirus in aquaculture.

The invention discloses a hierarchical porous nickel-aluminum alloy membrane with the electrocatalytic performance and a preparation method thereof. According to the method, a certain proportion of nickel-aluminum powder is taken, is mixed and pressed, and then is molten into a porous alloy membrane in a sintering mode, then the interior of the porous alloy membrane is enabled to form a microporous morphology through chemical corrosion, the alloy membrane forms a nano-pore structure with high specific surface area and high catalytic activity due to the fact that nickel-aluminum alloy is corroded by sodium hydroxide, so that the membrane separation and the electrocatalysis function are integrated without adding an additional supported catalyst, and therefore the processing capacity of the alloy membrane to dye wastewater is greatly improved, and the decolorization rate of the alloy membrane at the maximum flux is increased from 55% to 95% or above.

The invention discloses a double modified carboxymethyl chitosan derivative and a preparation method thereof. The molecular structural formula of the product is shown as formula (1), wherein x, y, z and n are natural numbers; x is more than or equal to 1 but less than or equal to 10000; y is more than or equal to 1 but less than or equal to 10000; z is more than or equal to 1 but less than or equal to 10000; and n is more than or equal to 1 but less than or equal to 30. The preparation method comprises the step of causing carboxymethyl chitosan, quaternary ammonium salt and (oligomeric) arginine to react under a catalyzing condition, thereby acquiring the double modified carboxymethyl chitosan derivative. The preparation method is mild in reaction condition, requires no high-temperature high-pressure treatment, requires no organic solvent or strong acid, is green and environment-friendly and is suitable for large-scale production. According to the invention, the quaternary ammonium salt and the (oligomeric) arginine are simultaneously grafted on a main chain of carboxymethyl chitosan, so that the derivative has excellent water solubility, antibacterial performance and biocompatibility.

The invention relates to a purification method for high-purity organic solvent normal propyl alcohol. The method includes steps: subjecting raw normal propyl alcohol to removal of high ultraviolet absorption impurities by the aid of activated carbon, utilizing desiccants such as anhydrous calcium sulfate or calcium hydride for drying and dehydration, rectifying, filtering and packaging to obtain the high-purity organic solvent normal propyl alcohol. By the purification method for the high-purity organic solvent normal propyl alcohol, chromatographic-grade normal propyl alcohol products with the purity higher than 99.8% can be obtained, the yield is higher than 95%, the acceptance rate is higher than 93%, and application requirements of users in aspects of scientific researches, subject studies and the like of the high-purity organic solvent (HPLC) normal propyl alcohol can be met. In addition, compared with conventional methods, the purification method for the high-purity organic solvent normal propyl alcohol is high in product purity, simple and convenient to operate and stable in product quality and can be used for large-scale production.

The invention discloses a collagenase inhibitor composition, an anti-aging moisture dew and a preparation method of the anti-aging moisture dew. The collagenase inhibitor composition comprises 50-99%of a Chinese wolfberry extract and 1-50% of a ginseng extract, and the mass ratio of the ginseng extract to the Chinese wolfberry extract is preferably 1: 3-15. The anti-aging moisture dew comprises the collagenase inhibitor composition and a penetration enhancer, the addition amount of the collagenase inhibitor composition is 0.01-10%, and the collagenase inhibitor composition comprises 50-99% ofthe Chinese wolfberry extract and 1-50% of the ginseng extract; wherein the addition amount of the penetration enhancer is 0.01%-10%, and the penetration enhancer is bis-diethoxydiethylene glycol cyclohexane 1, 4-dicarboxylate. According to the collagenase inhibitor composition, the Chinese wolfberry extract and the ginseng extract are matched, so that a synergistic effect is achieved, and the activity of collagenase can be well inhibited. The anti-aging moisture dew can reduce degradation of collagen, has an anti-aging effect, also has moisturizing and water locking effects, can prevent moisture loss, and creates a moisturizing barrier for the skin.

The invention relates to a purification method of highly pure organic solvent n-propanol. The method comprises the following steps of: removing the impurities with high ultraviolet absorption in the raw material n-propanol by active carbon; drying and dewatering the treated n-propanol by a drying agent of anhydrous calcium sulphate or calcium hydride; rectifying; filtering; and packing to obtain the highly pure organic solvent n-propanol. The purification method provided by the invention can obtain the chromatographic-grade n-propanol product with the purity more than 99.8%; the yield of the n-propanol is more than 93%; the qualified rate of the n-propanol is more than 93%; the application need of users of highly pure organic solvent n-proanol (HPLC) (high performance liquid chromatography) in the scientific research and the subject research can be satisfied; compared with the traditional methods, the n-propanol obtained by the method provided by the invention is high in the purity; the operation is simple; the quality of the product is stable, and thus the method can be applied to the large-scale production.

The invention provides a co-combustion preparation method of a sulfur doped graphene quantum dot and relates to a preparation method of a graphene quantum dot, in particular to the co-combustion preparation method which adopts cheap liquid paraffin and carbon disulfide as raw materials for preparation of the sulfur doped graphene quantum dot with a co-combustion method. According to the co-combustion preparation method of the sulfur doped graphene quantum dot, a structure and an energy level of the graphene quantum dot are effectively modulated through doping of heterogeneous sulfur atoms, so that photoelectrical properties of the graphene quantum dot are modulated, and the co-combustion preparation method of the sulfur doped graphene quantum dot is characterized in that the sulfur doped graphene quantum dot is obtained with the co-combustion preparation method, an ultrasonic preparation method and the like. According to the co-combustion preparation method of the sulfur doped graphene quantum dot, the overall technical route is innovative, the price is low, sulfur doped carbon nanospheres prepared with the co-combustion method are subjected to ultrasonic liquid-phase stripping, the sulfur doped graphene quantum dot is successfully prepared and has excellent photoelectrical properties, the extra energy level of the graphene quantum dot is increased, and the performance of the graphene quantum dot is effectively improved.

The invention relates to a preparation method for copper-doped multilayer graphene, and relates to graphene. According to the preparation method for copper-doped multilayer graphene, through doping ofheterogeneous copper atoms, the structure and the energy stage of the multilayer graphene are effectively regulated, and the photoelectric property of the multilayer graphene is improved. According to the preparation method, a graphite target material and a copper target material are used as raw materials, direct current radio frequency joint sputtering of magnetron sputtering is adopted, a copper element is led into a carbon substrate, and the structure and the energy stage of the multilayer graphene are effectively improved. According to the preparation method, low-cost easily-obtained andnontoxic graphite target material and copper target material are used as the raw materials, the copper element is led into the carbon substrate, the structure and the energy stage of the multilayer graphene are effectively improved, and the electron transition mode is more diverse; and the photoelectric property of the multilayer graphene is effectively changed, and the multilayer graphene can beused for detectors, light emitting diodes, solar batteries, supercapacitors, lithium ion batteries, fluorescent materials and other fields.

The invention discloses a PA56T/PET composite material, and relates to the technical field of engineering. The composite material is prepared from the following raw material components in parts by weight: 15-85 parts of PA56T; 15 to 85 parts of PET (Polyethylene Terephthalate); 2 to 20 parts of a compatilizer; 0.2 to 0.8 part of an antioxidant; 20 to 40 parts of glass fiber; and 0.2 to 1 part of a lubricant. According to the composite material and the preparation method thereof, the raw materials are low in price and environment-friendly, compared with the prior art, the PA56T/PBT alloy prepared from the bio-based PA56T combines the advantages of the PA56T and PET, the tensile strength and modulus are obviously improved, the impact strength is not lower than that of pure PA56T, the water absorption rate of the PA56T is greatly reduced, the dimensional stability of the PA56T is improved, and the composite material is suitable for industrial production. By means of the breakthrough, the alloy can be widely applied to materials of air conditioner parts, power distribution parts, automobile parts and the like, the production process is simple, and the excellent market prospect is achieved.

The invention relates to the technical field of high-resistance bulletproof composite materials and discloses an ultra-high molecular weight polyethylene fiber bulletproof composite material and a preparation method. The bulletproof composite material is prepared by compounding modified polystyrene resin and ultrahigh molecular weight polyethylene (UHMWPE) fibers, wherein the modified polystyreneresin is prepared by modifying polystyrene resin by adopting an ethylene-vinyl acetate (EVA) copolymer having high flexibility, elasticity and packing compatibility; the polymer prepared by polymerizing monomer styrene free radicals of the polystyrene resin is colorless and transparent, has high rigidity and is capable of improving wettability of the modified resin on fibers. The bulletproof composite material disclosed by the invention has the advantages of low density, high specific strength and specific modulus, shock absorption property, fatigue resistance, excellent environmental suitability and the like and meets bulletproof requirements. The preparation method disclosed by the invention has the advantages of simple steps and high operability and is capable of realizing batch production.

The invention discloses a dried fish further processing method which comprises the following steps: killing the selected fish; conducting salting on the fish according to different categories, and conducting rinsing on the salted dried fish; placing the fish in the natural withering area and conducting initial air drying and stoving after rinsing; cutting and packaging the dried fish after trimming, and conducting vacuum packaging, and product packaging after checking. The invention relates to a dried fish further processing method which contains neither corrosion remover nor food additives, is long in expiration date, convenient to eat, is provided with certain advancement, confidentiality and potential economic value, and solves the potential safety hazard problems that the conventional fish convenient products are less in variety and contain a large amount of corrosion remover and food additives.

The invention belongs to the field of daily chemicals, and particularly provides a composition for inhibiting melanin generation, whitening essence, and application thereof. The composition for inhibiting melanin generation comprises a cortex phellodendri extract and a licorice extract. The composition for inhibiting melanin generation has a synergistic effect by matching the cortex phellodendri extract and the licorice extract, and can well inhibit the generation of melanin. The whitening essence prepared by applying the composition for inhibiting melanin generation can reduce the generation of melanin, play a role in whitening, increase the moisture content of the cuticle, and block the moisture loss of the deep layer of the skin.

The invention relates to a PGS/SF electrospun artificial blood vessel and a preparation method thereof. The invention discloses a preparation method of the PGS/SF electrospun artificial blood vessel.The method comprises the following steps: 1, dissolving a PGS prepolymer and SF into an organic solvent to obtain a spinning solution; carrying out electrostatic spinning on the spinning solution; receiving micro-nano fibers by adopting a cylindrical receiving device rotating around the axis of the receiving device, winding the micro-nano fibers outside the receiving device to form a tubular PGS/SF electrospun membrane; and drying and solidifying the tubular PGS/SF electrospun membrane after completely spinning to obtain a PGS/SF electrospun artificial blood vessel. According to the PGS/SF electrospun artificial blood vessel, the spinnability and fiber forming property of PGS are improved through the SF, the PGS/SF electrospun artificial blood vessel is successfully obtained, the caliber of the electrospun artificial blood vessel is smaller than 6 mm, and the electrospun artificial blood vessel has the excellent elasticity of the PGS and the excellent biological and mechanical properties of the SF.