318results about How to "Will not damage the structure" patented technology

The invention relates to a method for performing amino functionalizing on a carbon fiber surface. The method comprises the steps that the fiber surface is coated with a copolymer coating containing a large amount of active amino by utilizing a Michael addition and Schiff base reaction of dopamine and poly-amino molecules through a one-step solution dipping method. Compared with the prior art, the method is simple in technology and mild in condition, does not damage a fiber body structure and can effectively increase active groups of the carbon fiber surface, and therefore the interface bonding property between fiber and resin is improved.

The invention relates to a method for preparing Fe3O4 magnetotactic bacterial cellulose spheres. The method comprises the following steps of: preparing nanoscale Fe3O4 (with superparamagnetism) by a coprecipitation method; sterilizing the nanoscale Fe3O4 and a fermentation culture medium respectively and mixing; inoculating gluconacetobacter xylinum (CGMCC No. 2955); controlling the rotate speed of a shaker and culture time to obtain magnetotactic cellulose spheres with different diameters; immersing and washing the magnetotactic cellulose spheres in flowing water for one hour to remove the residual thalli and the culture medium; and washing by using deionized water for five times (the using amount of deionized water every time is 500 milliliters). Due to inconsistent diameters of the magnetotactic bacterial cellulose spheres formed by fermentation, the magnetotactic bacterial cellulose spheres with required diameters can be screened out by using a screen plate with a certain bore diameter, and Fe3O4 particles are distributed uniformly and wrapped in the bacterial cellulose spheres layer by layer along with the biosynthesis and secretion of bacterial cellulose (BC). The magnetotactic bacterial cellulose spheres can be used as a vector of immobilized enzyme or cells, and have the advantage that: after a reaction is finished, the magnetotactic bacterial cellulose spheres are separated by a magnetic field, and can be used repeatedly after the magnetic field is removed.

The invention relates to a method of preparing ultrahigh molecular weight polyethylene fiber through gel spinning method. The method comprises the following steps: (1) preparing gel protofilament of ultrahigh molecular weight polyethylene; and (2) processing the gel protofilament through extracting, drying and hot drawing to obtain the ultrahigh molecular weight polyethylene fiber. The method is characterized in that the method also comprises the step of pre-drawing the gel protofilament obtained in the step (1) before the step (2), wherein the pre-drawing time is 2.2-24 times and the total hot drawing time in the step (2) is 30-45 times. The method of the invention can be used to obtain ultrahigh molecular weight polyethylene fiber product with low size and high breaking strength and the production cost is low.

The invention discloses a magnetic kieselgur based absorbent, and a preparation method and an application thereof. 1 to 10 percent of hydrochloric acid solution is adopted for performing pretreatment on kieselgur firstly, suction filtration and drying is performed on the kieselgur, then physical pre-modification of the kieselgur is performed through a plasma, then a ferrous ion solution is adopted to soak the kieselgur for realizing modification, alkali is added for adjusting the pH value to generate a magnetic precursor, and then the magnetic kieselgur based absorbent is prepared through suction filtration, stoving, roasting and grinding. The modified kieselgur provided by the invention has remarkably improved adsorbability, has a favorable adsorbability to substances difficult to degrade, meanwhile has a greater magnetic property, can realize solid-liquid separation of treated wastewater conveniently, and enables the reutilization of the kieselgur to be more convenient.

The invention discloses a thin film arranged on a substrate and a preparation method of the thin film. The thin film comprises a substrate layer and a thin film layer, wherein the thickness of the thin film layer ranges from 10*103 nanometers to 30*103 nanometers, and the thermal expansion coefficients of the base layer material and the thin film layer material are different. The preparation method includes the steps of preparing the thin film layer on the substrate of the same material, wherein a sacrificial layer is arranged between the thin film layer and the substrate of the same material; bonding the thin film layer on the target substrate, removing the sacrificial layer, and obtaining the thin film layer on the target substrate. When the expansion coefficient difference of the substrate material and the thin film material is large, the thin film layer which is uniform in film thickness and low in defect density is formed, and the thickness of the thin film reaches the nanometer grade; by means of the thin film prepared on different materials, compatibility of production processes and production lines of various materials can be achieved, semiconductor devices and thin film devices of the substrate material can be integrated, the machinable property of the thin film material is improved, and novel devices excellent in performance are produced.

The invention discloses an extraction and purification method of polysaccharide from Polygonatum kingianum, comprising the following steps: degreasing crude powder of a Polygonatum kingianum medicinalmaterial, carrying out water extraction for three times (40 min for each time), mixing filtrates, carrying out reduced pressure concentration at 60 DEG C to 1: 1.5, and carrying out alcohol precipitation for two times; mixing precipitates, and freeze-drying to obtain crude polysaccharide from Polygonatum kingianum; preparing a 0.3-0.5 g/mL solution by the use of the crude polysaccharide from Polygonatum kingianum, and carrying out depigmentation by loading the solution into D-101 macroporous resin; removing protein in the crude polysaccharide from Polygonatum kingianum by an isoelectric pointmethod; and carrying out dialysis by placing the protein-removed crude polysaccharide solution into a dialysis bag. By the method of the invention, polysaccharide in Polygonatum kingianum can be extracted effectively, impurities such as pigment, protein, micromolecular substances and the like in polysaccharide can be more thoroughly removed, and the structure of polysaccharide will not be damaged. In addition, use amount of an organic reagent is reduced, and polysaccharide purity is raised. The invention is an innovation of a purification method of polysaccharide from Polygonatum kingianum.

The invention discloses a method for improving corrosion resistance of a neodymium-iron-boron magnetic body. The method comprises the following steps: degreasing; performing first ultrasonic water washing; derusting; performing second ultrasonic water washing; performing surface conditioning; performing medium and high temperature phosphating, wherein the pH value of a phosphating solution is 2-4, the concentration of the phosphating solution is 8-20%, the temperature is 60-80 DEG C, and the phosphating time is 10-30min; performing medium and high temperature pure water washing, wherein the temperature of medium and high temperature pure water is 60-90 DEG C, the water washing time is 30-120s, and the electric conduction of the medium and high temperature pure water is not more than 50us/cm; passivating; performing normal temperature pure water washing; drying; soaking in an anti-rust agent, wherein the neodymium-iron-boron magnetic body after drying at normal temperature is soaked in the anti-rust agent with the concentration of 100%, and the soaking time is 10-40min; and carrying out blow drying or drying. The method has the advantages that the anti-rust agent is permeated into a phosphating layer, and a dense corrosion-resistant layer with an anti-oxidation function is formed on the neodymium-iron-boron magnetic body; compared with a traditional way of combining a pretreatment process with a roll-spraying process in the prior art, the corrosion resistance of the product is greatly improved.

The invention provides a method for purifying asiatic acid in asiatic pennywort herb. The method comprises the following steps of: adding a biological enzyme into an asiatic pennywort herb medicinal material serving as a raw material for performing natural enzymolysis; extracting a zymolyte with 70-99 percent alcohol solution for 1-3 times; recovering ethanol from an extracting solution under reduced pressure; adding petroleum ether into a concentrated solution for degreasing; dissolving a crude extract and adding macroporous resin for mixing; loading onto a macroporous resin column with a dry method; eluting with ethanol solutions of different concentrations; concentrating and crystalizing; refluxing, dissolving and recrystallizing a crystal with methanol and acetone; and drying to obtain a product. The method has the advantages of easiness for process operation, resin recyclability, and high content, high yield and low cost of the obtained product, and is suitable for industrial production.

The invention discloses a movable cold storage for solving the problems of poor heat preservation effect of an insulation board and trouble for manufacturing of a common cold storage in the prior art. The movable cold storage comprises a plurality of insulation boards; the insulation boards are sequentially connected to form a closed space; every two adjacent insulation boards are in inserted connection; one of every two insulation boards is fixedly provided with a convex plastic part produced by extrusion and the other one of every two insulation boards is provided with a groove in fit with the convex plastic part; the inner surface of each groove is fixedly provided with a sunken plastic part produced by extrusion; the tail end of each convex plastic part is provided with limiting outer inclined planes which are convex towards both sides of the convex plastic part; the inner surfaces on both sides of each sunken plastic part are respectively provided with limiting inner inclined planes which are convex inwards; and when the limiting outer inclined planes are matched with the corresponding limiting inner inclined planes, the tight fit is implemented between the surfaces of every two corresponding insulation boards. Not only does the movable cold storage have a simple process and is convenient for mass production, but also the insulation board structures cannot be damaged and the heat preservation effect is good; and the movable cold storage is very convenient to manufacture and assemble.

The invention discloses injectable modified HA (hyaluronic acid), a preparation method for the same and a composition. -OH in -COOH in an HA structural unit is partially substituted by a group shown in the original document, and the substitution rate is not lower than 40 percent. The modified HA can be directly reacted with chitosan to form hydrogel without chemical cross-linking reaction and damage to the structure of the HA. Rheodynamic experiments show that AHA-CS can be prepared into injection, and the formed hydrogel is stable in structure. Animal experiments show that the AHA-CS hydrogel has the effects of accelerating the healing of wounds and promoting cell proliferation and keratinocyte migration. Histological detection for the wounds treated by the hydrogel also proves that the hydrogel has the effect of promoting the formation of granulation tissues and capillaries. The expression of MRNA (messenger ribose nucleic acid) such as a VEGF-A (vascular endothelial growth factor), an SDF-1 (stromal-derived factor-1) and MMPs (matrix metalloproteinases) at the wounds treated by the hydrogel is increased or upregulated. Significantly, new hair follicles are found on the wounds treated by the hydrogel.

The invention provides carbon nanotube paper and a making method thereof. The making method of the carbon nanotube paper comprises the steps that a carbon nanotube is mixed with an activating agent, subjected to ultrasonic concussion, and stirred to form suspension liquid of the carbon nanotube firstly; then the suspension liquid is washed, filtered by a magnetic filter, and subjected to continuous heating finally, so that the tightly arranged carbon nanotube paper with a carbon nanotube structure and an undamaged shape is obtained. The carbon nanotube paper has the characteristics of integral structure, uniformity and tightness in arrangement, high electrical conductivity, good mechanical strength and the like; the shape, the size and the thickness of the carbon nanotube paper can be controlled through controlling a raw material ratio, so that different carbon nanotube paper meeting requirements is made. The carbon nanotube paper can serve as anode materials of a super capacitor and a Li ion electrode, and electrode materials in a nanofiltration membrane, a sensor and electrochemical synthesis, thereby having a good application prospect.

Disclosed is a manner of execution of a webpage scripting language. The process includes a first step of carrying out a webpage scripting language main function. When a first function of the webpage scripting language main function is carried out, a mark of the first function is obtained. The process includes a second step of constructing a second function according to a marked code. The process includes a third step of carrying out the second function after setting time is reached. The manner of execution and a device of the webpage scripting language calls the first function in the process of the implementation of the webpage scripting language main function, and unexecuted codes of the webpage scripting language main function are constructed to the second function through the first function, and therefore the unexecuted codes of the webpage scripting language main function are enabled to be executed in a suspending mode. After the setting time is reached, the suspend execution of the webpage scripting language is flexibly achieved by a manner that the unexecuted codes of the webpage scripting language main function are executed through the second function. The structures of original codes are not destroyed, and controlling the whole implementation process in the webpage scripting language is easy.

The invention discloses a method for rapidly synthesizing a hierarchical pore ZIF-61 material from a bimetal salt at normal temperature. The method successfully shortens the synthesis time to 1 min. The synthesis method comprises the following steps: 1, dissolving zinc acetate dihydrate and zinc oxide in a mixed solvent of N,N-dimethylformamide and water; 2, dissolving imidazole, dimethylimidazoleand sodium benzenesulfonate in methanol; 3, adding the above obtained imidazole, dimethylimidazole and sodium benzenesulfonate solution to the above obtained mixed solution of zinc acetate dihydrateand zinc oxide, and carrying out full stirring; 4, carrying out suction filtration on the obtained product, and activating the product with ethanol; and 5, carrying out vacuum drying to obtain the hierarchical ZIF-61 material. The (Zn-Zn) bimetal salt and sodium benzenesulfonate are added, so the method has the advantages of simplicity in operation, mild conditions, and great shortening of the synthesis time. The product simultaneously has micro-porous, meso-porous and macro-porous tunnels, has a high space-time yield, and has good application prospects in the fields of adsorption separation and catalysis of macromolecules.

The invention discloses an automatic starting and closing type anti-freezing device of a wind screen of a cooling tower, comprising an air partition ceiling, an adjustable wind-shield wall and a cooling tower body, wherein the air partition ceiling is fixed on the cooling tower body and the adjustable wind-shield wall; the adjustable wind-shield wall comprises a plurality of synchronous rotation starting and closing units of the wind screen, and each synchronous rotation starting and closing unit of the wind screen comprises a frame, a wind screen, an upper rotating component, a lower rotating component and a synchronous driving part; the wind screen can rotate relatively to the frame, and all wind screens are driven to synchronously rotate by the synchronous driving part. Because the wind screen is installed on the frame in the rotating mode, the wind screen can rotate relatively to the frame; when temperature is low in winter, the synchronous driving part drives all wind screens to be in closing state, and all wind screens are in the starting and ventilating state when the temperature rises. The invention can freely adjust the starting and the closing state of the wind screens according to external temperature so as to ensure that the cooling tower can normally and efficiently operate in any season.

A method for preparing inductor includes winding a flat bare wire to be a coil and holding connection pin at two ends of coil, folding two connection pins towards the same direction at the same height, spraying an insulation layer on surface of two connection pins and coil, injecting a covering body in range of coil and two connection pins for positioning them, using a partial connection pin being exposed externally as connecting face to be connected with external circuit and setting said covering body in magnetic conduction base made by iron powder and in cover.