129results about How to "Porous structure" patented technology

The invention discloses a preparation method for a graphene fiber and belongs to the field of graphene fiber preparation. The preparation method comprises the following steps: firstly, preparing 2-20 mg.mL<-1> purified graphene oxide solution by using an oxidation stripping graphite method; secondly, injecting the graphene oxide solution in the first step in a pipeline reactor with the inside diameter of 0.1-10 mm and sealing; thirdly, heating the pipeline reactor at the temperature of 100-300 DEG C for 1-6 hours and reducing and assembling the graphene oxide into a water-containing graphene oxide fiber; and fourthly, drying the water-containing graphene fiber obtained in the third step at the temperature of 20-60 DEG C and dehydrating and contracting the water-containing graphene fiber to obtain dry graphene fiber. The preparation method is simple in operation process and low in raw material cost; and the graphene fiber obtained by the method disclosed by the invention has the advantages of uniform structure, excellent mechanical property and easiness in functionalization.

There are described freeze-dried food products which have porous structure with fine texture than those obtained by conventional processes to give smooth melting in mouth and a process for preparing the freeze-dried food products. According to the process, raw materials for the food are made into a form of aqueous solution or paste, emulsified, made into semi-frozen state by cooling the emulsion, freeze-dried by further cooling in a mold, and then subjected to freeze-drying treatment.

The present invention provides a method for preparing a superabsorbent polymer, the method comprising the steps of: forming a function gel polymer by cross-linked polymerization of a monomer mixture under the presence of an internal cross-linking agent, the monomer mixture including a water-soluble ethylene-based unsaturated monomer having an acid group at least part of which is neutralized, a carbonate, a volatile organic solvent, a surfactant, and a bubble promoting agent; forming a base resin powder by drying, grinding, and classifying the function gel polymer; and forming a surface cross-linked layer by additional cross-linking of the surface of the base resin powder under the presence of a surface cross-linking agent. The method for preparing a superabsorbent polymer may provide a superabsorbent polymer which has a porous structure, thereby exhibiting an excellent absorption rate while exhibiting excellent gel strength. Such a superabsorbent polymer may have excellent physical properties such as water retention capacity, absorbency under pressure, and flowage.

In the graphene manufacturing method, a graphite oxide is formed from graphite, and then the graphite oxide is treated with a hydrochloric acid. The hydrochloric acid-treated graphite oxide is reduced at temperature of 120° C. or above and 200° C. or below by performing thermal treatment thereto. Since a low-temperature process is used for manufacturing graphene by performing thermal treatment at a relatively low temperature for a short time, this method has great economic feasibility and utilization. Due to a simple composing process and low thermal treatment temperature, graphene may be mass-produced with a low price. In particular, the graphene may be used as a cathode material for a lithium secondary battery, which exhibits a high capacity at a high voltage of 2V or above by reacting with Li, different from an anode material of a lithium secondary battery.

The invention discloses a preparation method of a novel high-selectivity positively-charged nanofiltration composite membrane. The preparation method comprises the following steps: taking positively-charged polyethylenimine as a functional layer material of the composite membrane, taking aromatic polybasic acid as a crosslinking agent and modifying, and coating and crosslinking on a nanofiltrationmembrane supporting layer to obtain the high-selectivity positively-charged nanofiltration membrane. By adopting a gradient crosslinking technology, the pore diameter of a prepared composite membranecrosslinking layer is gradually increased from bottom to top; and the water flux is greatly improved under the condition of keeping high desalting performance. The preparation method disclosed by theinvention is simple in technology and easy to operate; and the prepared composite membrane can be operated under a low-pressure condition, so that the cost is reduced and the composite membrane is easy to popularize and apply. The nanofiltration membrane prepared by the preparation method has relatively high selectivity on multivalent cations and monovalent cations and can be used for the fieldsincluding water softening, medicines, dyestuffs, lithium extraction of salt lakes, industrial wastewater and the like.

The invention relates to a simple method for synthesizing porous magnetic ferroferric oxide (Fe3O4) microspheres. The porous magnetic Fe3O4 microspheres are formed by making ferrous ion salt and ferric ion salt as ferrum raw materials react in aqueous solution at 80-95 DEGC for 20-72h under the protection of N2, wherein the urea is used as the alkaline precipitating agent, and the polyvinyl alcohol and the acetic acid are used as the stabilizing agents. By changing the addition amount of the polyvinyl alcohol and the acetic acid, the grain size of the Fe3O4 microspheres can be effectively controlled. The porous magnetic Fe3O4 microspheres can disperse stably in water for 2 days and has good application prospect in the biomedical filed. The simple method for synthesizing the porous magnetic Fe3O4 microspheres has the advantages of cheap and readily available raw materials, mild reaction condition, good repeatability, high yield and simple equipment, is green and pollution-free and is easy to realize large-scale production.

The invention provides a preparation method of a membrane adsorbent for removing ammonia nitrogen in wastewater. The preparation method comprises the following steps: treating modified pure water sludge; adding polyvinylpyrrolidone into a tapered bottle containing dimethyl acetamide; adding polyvinylidene fluoride after uniformly stirring; re-adding pure water sludge after dissolution; after fully stirring, sealing the bottle mouth and leaving the mixture to stand for defoaming to prepare a casting solution, wherein the addition of polyvinylpyrrolidone accounts for 2-4% of the mass of the casting solution, the total mass of polyvinylidene fluoride and sludge particles accounts for 17-20% of the mass of the casting solution, the mass ratio of polyvinylidene fluoride to the sludge particles is (3:7)-(7:3), and the rest is dimethyl acetamide; striking the casting solution on a glass plate to manufacture a flat sheet membrane; then placing the flat sheet membrane in a pure water precipitating bath; soaking in deionized water after film forming, and then taking out; placing the membrane in anhydrous ethyl alcohol to be soaked; taking out the membrane; naturally cooling to obtain the membrane adsorbent. The membrane adsorbent can absorb ammonia nitrogen in water and is renewable.

The invention discloses garlic crisp chips and a processing method thereof. The method comprises the following steps: peeling and slicing garlic raw materials to obtain garlic slices; and sequentially performing pretreatment, pre-drying, sizing and after-drying to obtain the garlic crisp chips. Compared with the conventional process flow, the process flow of the method has the advantages that the drying time is greatly shortened; the production cost is reduced; and a garlic crisp chip product has a good market application prospect. Nutrient substances in the raw materials of the garlic crisp chips are well kept. The garlic crisp chip product looks good, smells goods, tastes good, and is crisp. Different flavors of products can be prepared according to market requirements.

The invention relates to a multifunctional pesticide fertilizer and a production method thereof. The raw materials of the multifunctional pesticide fertilizer comprise 0.1-9 parts by weight of a pesticide, 20-60 parts by weight of a macro-element fertilizer, 0.5-4 parts by weight of a trace element fertilizer, 5-15 parts by weight of an acrylamide or starch graft, and 10-20 parts by weight of a carrier, wherein the pesticide comprises at least one of avermectin and polyoxin; the macro-element fertilizer comprises at least one of a nitrogen fertilizer, a phosphorus fertilizer and a potassium fertilizer; the trace element fertilizer comprises at least one of zinc and molybdenum; the carrier is an ore waste residue or a boron sludge; and the multifunctional pesticide fertilizer is prepared through mixing and granulating the raw materials. The pesticide fertilizer production method has the advantages of simple technology, low production cost, water utilization rate increase, and guarantee of the drug effects of the pesticide and the fertilizer efficiencies of the above fertilizers.

The invention provides lucid ganoderma fruit chiffon cake, which comprises lucid ganoderma fruit. The invention also provides a preparation method of the cake. According to the preparation method of the cake, lucid ganoderma fruit powder is added on the basis of chiffon cake, the original nutrition ingredients of the lucid ganoderma fruit are maintained, the nutrition value and the health care function of the cake are improved, in addition, good mouth feeling, flavor and tissue structures of the chiffon cake are ensured, meanwhile, the bitter taste and the astringent taste caused by lucid ganoderma are completely shielded by the flavor of the chiffon cake through an optimized recipe.

The invention discloses an areca nut ultrahigh-pressure quick water restoration technology. The technology includes the steps of boiling seeds, mixing materials and conducting water restoration. The high-temperature steam steaming procedure and the pricking procedure are further included between the seed boiling procedure and the material mixing procedure. The temperature of high-temperature steam ranges from 110 DEG C to 118 DEG C, and steaming time is 10-15 min. Ultrahigh-pressure water restoration is adopted in the water restoration procedure, the water restoration pressure is 20-600MPa, the water restoration temperature ranges from 20 DEG C to 42 DEG C, and the water restoration time is 5-60 min. The areca nut ultrahigh-pressure quick water restoration technology has the advantages of being high in production efficiency, short in water restoration time, low in microorganism content and good in product quality, and application prospects are good.

The invention discloses a method for preparing a high-performance silicon-carbon negative electrode composite material of a lithium ion battery, and belongs to the technical field of negative electrodes of the lithium ion batteries. The method comprises the following steps of (1) selecting micron silicon powder as a raw material to prepare nano silicon powder; (2) carrying out high-temperature annealing on carbohydrates under the protection of inert gas to obtain an amorphous carbon material; (3) mixing the nano silicon powder obtained in the step (1) with the amorphous carbon material obtained in the step (2) and then adding into a ball mill to carry out ball milling in order to obtain a binary precursor material; and (4) adding the binary precursor material obtained in the step (3) and graphite into the ball mill to be subjected to ball milling again in order to obtain the silicon-carbon negative electrode composite material. The silicon-carbon negative electrode composite material obtained by the invention has a ternary structure, the volume expansion of silicon particles is buffered, and the pulverization of the material in a lithium de-intercalation process is inhibited; and the specific capacity is improved through multiple compact coating layers, and the first coulombic efficiency and the cycling stability are improved.

A piezoelectric device includes a piezoelectric substrate having a connection pad, a package having an electrode pad, and a connection member to connect the electrode pad to the connection pad, the connection member being a metal member having a plurality of spherical metal particles connected to each other by sintering.

A positive electrode for a nonaqueous electrolyte secondary battery according to the present invention is provided with a porous positive electrode active material layer that contains a positive electrode active material. The positive electrode active material layer is formed so that a logarithmic differential pore volume distribution curve thereof, which shows the relation between pore diameter and pore volume of pores in the positive electrode active material layer, is a single-peak type curve. The distribution curve has a main peak having a full width at half maximum of from 0.001 μm to 0.05 μm inclusive, and the sum of the pore volumes of the pores within a pore diameter range corresponding to the full width at half maximum is 70% or more of the total pore volume.

The invention discloses an adhesive tape preparation method. The preparation method comprises mixing delustring PVC and HMWPVC, adding fiber powder, a dispersant, a plasticizer and paraffin into the mixture, carrying out heating and thermal insulation, extracting paraffin through an organic solvent, carrying out drying, carrying out calendering to obtain a film, immersing the film in ethanol, carrying out air drying, smearing the film with acrylic acid and diphenyl ketone, carrying out irradiation through a UV high pressure mercury lamp to obtain a base, coating one surface of the base with a glue, carrying out drying, bonding a release film to the other surface of the base and carrying out slitting to obtain the adhesive tape. The adhesive tape has good cold and hot resistance, mechanical properties, insulating properties, good infiltration effects, good bonding force between the adhesive tape and the glue and does not easily produce degumming.

The invention discloses heavy metal contaminated soil improving coated fertilizer and a preparation method thereof. The preparation method includes the steps of 1), preheating fertilizer granules; 2),mixing ammonium magnesium phosphate with grease by blending to obtain coated slurry; 3), evenly spraying the coated slurry to surfaces of the fertilizer granules preheated in the step 1); 4), evenlymixing biochar powder with wormcast powder and coating the mixture on a product to obtain the coated fertilizer after performing cooling and drying. The surface of the fertilizer is coated with a layer of a film-forming material, heavy metals in the active state in soil can be passivated, pollution caused by the heavy metals to the ecosystem is reduced, and fattening release cycle of the fertilizer can be delayed; the prepared coated fertilizer meets requirements of the state for the coating fertilizer, the fertilizer is decomposed gradually under the action of chemical and biological factorsafter applied to the soil, nutrients are released slowly, and requirements of crops in the whole growing period on the nutrients can be met.

The invention discloses a preparation method of small-size abalone shell hydroxyapatite porous microspheres. The preparation method comprises the following steps: taking abalone shells as a main raw material, cleaning substances on the surface layers of the abalone shells, conducting naturally drying, crushing and sieving the substances by 200 meshes to obtain abalone shell powder, dissolving abalone shell powder, and then dripping a phosphoric acid solution at a constant speed according to the molar ratio of Ca to P of 1.67 to 1, then adding sodium citrate and a poly aspartic acid template agent, simultaneously adding urea to adjust the pH, and synthesizing uniformly stirred precursor reaction solution into the hydroxyapatite porous microspheres by a hydrothermal method. The preparation method is simple, wide in raw material source, low in cost and easy to popularize.

The invention belongs to the field of chemicobiology and relates to a detection method for protein with nucleic acid aptamer target gathering and laser enzymolysis. Firstly, nanogold with the diameter of 13nm and a target board are in epoxy dripping mode, the anogold is dryed and calcined, and even and thick gold films are formed on the target board. With the method, the gold films which are with a loose hole-type structure are formed on the surface finish of the target board, large specific surface area is provided, excellent stability and biocompatibility are achieved, and the method for protein with nucleic acid aptamer target gathering and laser enzymolysis can be applied to various functionalized modifications. Secondly, nucleic acid aptamers of mercapto modification is fixed on the target board. Thirdly, target protein is gathered and target quick laser enzymolysis is supplemented, and samples are sent to matrix-assisted laser desorption ionization (MALDI)-time-off-flight mass spectrometer (TOFMS) to accept qualitative and quantitative analysis. The whole experiment process is simple, quick, accurate and can be widely applied into high-throughput qualitative and quantitative analysis of important protein.

The present invention discloses a salt-containing oyster powder decontamination antibacterial material and a preparation method and a use method, the salt-containing oyster powder decontamination antibacterial material is a mixture of oyster shell powder with teh particle diameter of 50mum or less, food grade sodium bicarbonate powder and sodium chloride powder in a weight ratio of 1:0.45-0.55:0.45-0.55; wherein the oyster shell powder has a porous structure, and is high activity powder obtained by calcinations and grinding of oyster shell as a raw material. According to the preparation method, clinker is prepared by three-level stepped heating calcining method to obtain the porous structure and high chemical activity; and the use method of the salt-containing oyster powder decontamination antibacterial material used for removing agricultural pesticide residues is simple, safe and efficient, and free of secondary pollution. Compared with the prior art, the salt-containing oyster powder decontamination antibacterial material has low cost, energy saving, safe and efficient use, green environmental protection and other characteristics, is suitable for all kinds of fruit and vegetable washing treatment, can effectively eliminate residual agricultural chemicals deposited on the surface, and can kill escherichia coli.