30results about How to "No need to restore" patented technology

The invention discloses a low-cost carbon graphene sheet and a preparation method thereof. The preparation method comprises the following steps of: mixing a carbon material (coal, coke, resin carbon, graphite, bamboo charcoal or active carbon) as a raw material and an additive; then preparing the graphene sheet through processes, namely vacuum carbonization, pickling, ball milling, and the like, at low cost. The graphene sheet prepared through the preparation method disclosed by the invention has the advantages of less structural defect, low preparation cost, easiness for operation, greenness, environmental protection, easiness for industrialization and outstanding economic and social benefits.

The invention discloses a method for numerously preparing a graphene material, which takes asphalt as a raw material and comprises the processes of preparing, pyrolyzing and carrying out carbonization. Compared with the conventional preparation of the graphene material, the method disclosed by the invention has low preparation cost, little equipment investment, simplicity for operating, no pollution, and easiness for realizing industrialization; and in addition, the purity of a product is high, the structure defect of the product is little, and the performance of the product is excellent.

The invention relates to an active gel electrophoresis method for lactalbumin. The method utilizes active acrylamide gel, mixes a lactalbumin sample with a buffer solution, and then directly performs electrophoretic analysis under the conditions as follows: an electrophoresis buffer solution is a Tris-glycine buffer solution with the pH of 8.3; the sample loading amount is that the ratio of lactalbumin to 2-times active protein sample buffer solution is 1:3-5, 7.5 mu L; the voltage is between 75 and 150 V; the time is between 25 and 75 minutes; and the temperature is between 2 and 4 DEG C. The active electrophoresis method has the advantages of small quantity of samples, high resolution, high sensitivity, good repeatability and capability of accurately analyzing the content of various types of lactalbumin and sensitively judging the processing techniques and quality situations of dairy products.

The invention belongs to the technical field of information functional materials and in particular relates to BiFeO3-Bi0.5Na0.5TiO3 base multiferroic solid solution ceramic and a preparation method thereof. The preparation method comprises the following steps of: dissolving bismuth nitrate and ferric nitrate in a citric acid solution to form a transparent BiFeO3 solution; dissolving butyl titanate, bismuth nitrate and sodium nitrate into the citric acid solution to form a transparent Bi0.5Na0.5TiO3 solution; mixing the BiFeO3 solution and the Bi0.5Na0.5TiO3 solution by a certain molar ratio and then regulating the pH value to 7-7.5 with ammonia water; aging, dewatering and drying the mixed solution to form black xerogel; grinding the xerogel and carrying out heat treatment to remove organic matters to obtain precursor powder; and grinding, tabletting and sintering the precursor powder to obtain the BiFeO3-Bi0.5Na0.5TiO3 base multiferric solid solution ceramic. The BiFeO3-Bi0.5Na0.5TiO3 base multiferric solid solution ceramic has the characteristics of single phase structure, low leakage current, ferroelectric/ferromagnetic coexistence at room temperature, and the like and has wideapplication prospect in the aspects of manufacturing emerging spin valve devices, magnetoelectric storages, magnetoelectric sensors and microwave resonance devices.

The invention provides a graphene hollow fiber and a continuous preparation method thereof. The continuous preparation method of the graphene hollow fiber is characterized by comprising the following steps: continuously drawing copper wires out and immersing the drawn-out copper wires in a graphene oxide electrolyte; then, electrochemically plating graphene on the surfaces of the copper wires through a three-electrode system; next, continuously collecting the copper wires of which the surfaces are coated with the graphene, and rolling the collected copper wires into rolls; subsequently, immersing the rolls in an aqueous solution of ferric chloride to dissolve the copper wires; and finally, performing cleaning and drying so as to obtain the graphene hollow fiber. According to the graphene hollow fiber prepared by using the method, the hollow diameter and the thickness of a pipe wall can be adjusted and changed in a wide range, and a solid foundation for the applications of the graphene hollow fiber in the aspects of filtration and separation, energy, sensing, braking and the like is established.

The invention relates to a method for producing a gadolinium vanadate thulium blue luminescent material modified by glucose, and the method comprises the following steps: (1) taking ammonia metavanadate, gadolinium nitrate, thulium nitrate and citric acid as the basic raw materials, taking glucose as a modifier, putting ammonia metavanadate in a container and adding deionized water, defining the produced solution as a solution A, putting gadolinium nitrate, thulium nitrate and citric acid into the container and adding deionized water, defining the produced solution as a solution B, adding thesolution A into the solution B, then adding glucose and uniformly mixing to form sol, regulating the pH value of sol to: 4<=pH<=10, continuously stirring at the temperature of 60 DEG C - 80 DEG C until gel is formed, then drying the gel to obtain a precursor; (2) grinding and dispersing the precursor, calcinating at the normal pressure of 700 DEG C - 900 DEG C for 1 - 4 hours, then taking out andair cooling; (3) grinding and dispersing the calcinated products, then cleaning, drying the cleaned powder to obtain the gadolinium vanadate thulium blue luminescent material modified by glucose.

The invention discloses Bi2Fe4O9-MgFe2O4 composite ceramic and a preparation method thereof. The composite ceramic has the chemical composition expression as follows: (1-x)Bi2Fe4O(9-x)MgFe2O9, whereinx is larger than or equal to 0.1 and smaller than or equal to 0.5. The composite ceramic is prepared with the method as follows: 1) preparing a Bi2Fe4O9 solution; 2) preparing a MgFe2O4 solution; 3)preparing black xerogel; 4) preparing the Bi2Fe4O9-MgFe2O4 composite ceramic. The composite ceramic has a pure phase structure, and the magnetism and the dielectric constant are easy to control. The method is simple to operate, short in cycle, low in cost, environmentally friendly and non-toxic and does not require a reduction atmosphere.