131results about How to "No need to remove" patented technology

The invention relates to a glass fiber reinforcement wheat straw or rice straw composite material and a preparation method thereof. The composite material comprises wheat straws or rice straws, glass fiber, polymer and additives, wherein the mass content of components except for the additives is 90%-100%, and the mass content of the additives is 0%-10%; the mass ratio of the wheat straws or rice straws to the glass fiber to the polymer except for the additives is 100:(10-40):(50-140). The glass fiber for reinforcement is chopped glass fiber strands with the length of 1cm-3cm. The glass fiber is directly or soaked, or treated directly or soaked and then subjected to surface coating so as to be used; the materials are directly mixed in the using process, and the mixing capability of materials can be reinforced by means of a solution or emulsion. The glass fiber is not subjected to strong shearing before hot pressing, thus keeping a good shape. The composite material prepared by adopting the method is high in strength, smooth in the surface, and uniform in performance; the preparation method is simple and efficient and strong in environment-friendliness.

The invention provides a preparation method and application of a magnetic MIL-100 composite material. The magnetic MIL-100 composite material is Fe3O4/C@MIL-100, wherein the MIL-100 is a metal-organic framework material constructed by iron and trimesic acid. A synthesis method comprises the following steps: firstly, preparing a carbon layer clad magnetic microsphere and preparing the Fe3O4/C@MIL-100 composite material. The prepared magnetic MIL-100 composite material is used for finding and detecting a blood serum biomarker. The preparation method and the application, provided by the invention, have the advantages that a carbon layer is ingeniously and uniformly clad on the surface of a high-quality Fe3O4 microsphere by the preparation method, and the Fe3O4/C@MIL-100 composite material is prepared in situ by a one-pot method; the composite material has a magnetic separation property of magnetic nano particles and a size exclusion effect of MIL-101; and high-abundant protein does not need to be removed, and the composite material can be rapidly and efficiently suitable for finding and detecting the blood serum biomarker.

The invention provides a mesoporous manganese dioxide material. Particle of the mesoporous manganese dioxide material is spherical-like, the surface of the particle is provided with mesopores and diamond-shaped bumps, the aperture of each mesopore is 5 to 30nm, and the specific surface area of the particle is 120 to 160 m<2>/g. The invention also provides a method for preparing the mesoporous manganese dioxide material. The method comprises the following steps of mixing a potassium permanganate solution and an ascorbic acid solution; and reacting to obtain the mesoporous manganese dioxide material under agitation, wherein the molar ratio of potassium permanganate to ascorbic acid is 10:(1-8). Besides, the invention provides a supercapacitor. The mesoporous manganese dioxide material has surface appearance similar to that of a walnut, the specific surface area, which is calculated by a brunauer-emmett-teller (BET) method, of the mesoporous manganese dioxide material is relatively large, and the supercapacitor has high electrochemical performance, particularly has relatively high unit specific surface area specific capacitance.

A vacuum treatment method for dephosphorizing molten steel to produce low-phosphorus (or ultralow-phosphorus) weakly-deoxidized steel or other steel features that in the vacuum carbon-oxygen reactionphase, the oxygen or iron oxide needed by dephosphorizing reaction is added to the molten steel pool in a vacuum chamber while the lime blocks or powder is added for quickly dephosphorizing, and thismethod can also prevent rephosphorization from the steel ladle slag.

The invention provides micro-nano lignocellulose, a preparation method and applications thereof. The micro-nano lignocelluloses contain lignin structures; lignin is bonded with cellulose through hydrogen bonds and chemical bonds. The preparation method comprises following steps: a lignin containing cellulose raw material is dispersed in a hot urea aqueous solution so as to obtain a cellulose raw material dispersion liquid; mechanical pre-treatment is adopted for peeling and grinding so as to obtain a pre-treatment product; and the pre-treatment product is subjected to high pressure homogenizing using a high pressure homogenizer so as to obtain a micro-nano lignocelluloses dispersion liquid. According to the preparation method, removing of the lignin in the lignin containing cellulose raw material is not needed, the hot urea aqueous solution is combined with mechanical pre-treatment and high pressure homogenizing so as to prepare the product; the diameter of the obtained micro-nano lignocelluloses ranges from 5 to 180nm; the length/diameter ratio is 200 or larger; the lignin content ranges from 10 to 35wt%; micro-nano cellulose performance is improved; and the application prospect is promising.

The invention relates to a preparation method for nanoscale alumina powder. The method includes allowing the reaction between aluminum powder and solvent n-hexanol to prepare an aluminum alkoxide compound, hydrolyzing, distilling, separating, and roasting to prepare nanoscale alumina powder product. The invention has no need for catalyst removal, has no need for large amount of water to wash away the impurities in the material, reduces the discharge of wastewater, reduces pollution and saves the production cost; in the production process, the used alcohol can be recycled (with recovery rate at 90%), to greatly reduce the production cost; and the product has low impurity content, large pore volume, large specific surface, and reasonable pore size distribution, and can be used as an industrial catalyst carrier.

The invention belongs to the technical field of farmland management, and particularly relates to a method for removing farmland heavy metal pollution in situ through an environment-friendly eluting agent. The method comprises the following steps: (1) a work cushion layer and a plastic film are sequentially arranged on mellow soil of farmland; (2) a pumping and injecting system is formed; (3) smallholes are evenly formed in the outer surface of the part, inserted into the mellow soil, of an eluting filter pipe; (4) small holes are evenly formed in the outer surface of the part, inserted into the mellow soil, of a vacuum collection filter tube; (5) the environment-friendly eluting agent is determined; (6) the well distance is determined according to the migration speed and the repair periodT of the environment-friendly eluting agent in the mellow soil; and (7) the environment-friendly eluting agent enters the mellow soil through the eluting filter pipe, through oxidation and complexingreactions between the environment-friendly eluting agent and the mellow soil, heavy metal in the mellow soil is transferred into a liquid phase, the heavy metal polluted farmland is repaired in situ,and an eluting solution is formed. The technical scheme has the beneficial effects that the treatment process is carried out in situ, polluted soil does not need to be removed, and operation is easyand convenient.

The invention discloses vinyl siloxane grafted hydrogen-containing silicone oil and a preparation method thereof, and belongs to the technical field of organic synthesis. The vinyl siloxane grafted hydrogen-containing silicone oil is provided, and modified hydrogen-containing silicone oil is obtained by an addition reaction of a C=C bond with a Si-H bond. The vinyl siloxane grafted hydrogen-containing silicone oil and the preparation method thereof are also provided, and the method comprises the following steps: first stirring hydrogen-containing silicone oil and performing slow heating; thensequentially adding a solid platinum-containing catalyst and vinyl siloxane, and carrying out a reaction at a constant temperature for a period of time; and finally performing cooling, and filtering out the platinum-containing solid catalyst to obtain the vinyl siloxane grafted hydrogen-containing silicone oil. In the preparation reaction system, preferably the platinum content accounts for 0.02-0.06% of the mass of the hydrogen-containing silicone oil, and preferably the molar ratio of the C=C bond in the vinyl siloxane to the Si-H bond in the hydrogen-containing silicone oil is (1-1.05):1; and the vinyl siloxane grafted hydrogen-containing silicone oil with high viscosity and low hydrogen content can be obtained under reactive solvent-free conditions.

The invention relates to a method for preparing thermoplastic toughened epoxy resin with a thermal reversible chemical crosslinking characteristic. The method comprises the steps as follows: 1) afterbifunctional epoxy resin and polyfunctional epoxy resin are mixed, the mixture and furfurylmercaptan are subjected to a click reaction, and an intermediate with a furan functional group as a terminalgroup is obtained, wherein the bifunctional epoxy resin is an epoxy monomer containing two epoxy groups and the polyfunctional epoxy resin is an epoxy monomer containing three or more epoxy groups; 2)the intermediate and a crosslinking agent containing a maleimide group are subjected to a Diels-Alder reaction to produce reversible crosslinked toughened epoxy resin. The defect that traditional curing epoxy resin is difficult to dissolve and melt is overcome. The thermoplastic reversible crosslinked toughened epoxy resin is recycled by use of Diels-Alder covalent bonds and can still keep performance of traditional epoxy resin, and the method is convenient and has industrial application prospects.

The invention relates to a compound interface layer modified C/C composite material as well as a preparation method and an application thereof, in particular to a carbon fiber/matrix carbon interface modified C/C composite material as well as a preparation method and an application thereof. The compound interface layer modified C/C composite material comprises carbon fibers, B-containing graphite layer, a SiC layer and a pyrolytic carbon layer, wherein the carbon fibers are coated with the B-containing graphite layer, the SiC layer is located between the B-containing graphite layer and the pyrolytic carbon layer, the B-containing graphite layer is coated with the SiC layer which is coated with the pyrolytic carbon layer, and the pyrolytic carbon layer contains graphite. The preparation method of the compound interface layer modified C/C composite material comprises the following steps: the carbon fibers dipped in boric acid aresubjected to first graphitization treatment, the treated carbon fibers are then coated with nano-SiC fibers, CVI densification is performed, and finally, graphitization treatment is performed once more. The composite material is reasonable in structural design, the preparation process is simple and easy to control, and the obtained product has excellent performance and is particularly applicable to friction materials.

The invention relates to a preparation method of a binary polyacrylonitrile carbon fiber precursor. The method comprises the following steps: mixing acrylonitrile, a second comonomer beta-itaconic acid ester amide and a solvent in the presence of nitrogen, and adding an initiator; reacting for 22-38 hours under the condition of 35-75 DEG C, so as to obtain an acrylonitrile polymer; then filtering, taking off and defoaming, so as to prepare a spinning solution; spinning the spinning solution by virtue of a dry-jet wet process, stretching, oiling, drying, densifying, drawing by hot steam, and thermoforming, so as to obtain the binary polyacrylonitrile carbon fiber precursor. By adopting the preparation method, double functional group beta-itaconic acid ester amide is adopted as a comonomer, and a polyacrylonitrile macromolecule for the carbon fiber precursor is prepared by binary copolymerization and substituted ternary copolymerization. Thus, the dosage of the comonomer is reduced, meanwhile, the structural regularity of the polyacrylonitrile macromolecule is improved, and the prepared carbon fiber precursor is even in structure, small in fineness and high in strength.

The invention discloses a prestressed concrete supporting pile wall, which comprises a cement-soil wall consisting of a plurality of cement-soil stirring piles. The cement-soil wall is provided with an outwards protruded or staggered structure, prefabricated piles are continuously or intermittently inserted in the cement-soil stirring piles, each prefabricated pile comprises multiple sections of reinforced concrete members, a plurality of through holes are arranged on each reinforced concrete member along an axis direction, the reinforced concrete members of each prefabricated pile are serially connected together via an anti-bending rope penetrating through the through holes of the prefabricated pile, after being tensioned, each anti-bending rope is respectively fixedly connected with two ends of the corresponding prefabricated pile, and a reinforcing anti-shear plate is fixedly mounted at a joint of each two adjacent reinforced concrete members. Due to the mode, the prestressed concrete supporting pile wall not only guarantees safety and reliability of a foundation pit supporting structure, but also has a good economic benefit, is convenient in construction and low in influence to environments, and further meets requirements of foundation pit engineering construction.

The invention relates to a coiled steel strip weight measuring and calculating method. With the method adopted, the weight of steel strips on a keel uncoiler can be calculated more accurately without dissembling the steel strips required. The method includes the following steps that: the width L1 of coiled steel strips is measured, and the specifications of the steel strips are determined; (2) the thickness deltaD of the coiled steel strips and the radius D1/2 of coiled steel strip holes are measured; (3) the weight G1 of the coiled steel strips is obtained according to G1=L1*PI*7.85*zeta*(D1*deltaD+deltaD2); (4) G1=A*(D1*deltaD+D2)=A*deltaD2+A*D1*deltaD is obtained, and a function of a variable G1 of steel strips of each specification relative to deltaD is determined; (5) curves indicating a situation that the weight of the steel strips of each product specification changes with the radius of the steel strips are drawn, and data in a first quadrant area are selected, and deltaD is marked on an X axis, and G1 is marked on a Y axis, and vertical lines are drawn according to different deltaD so as to intersect with the curves, parallel lines of the X axis, which pass through intersection points of the vertical lines and the curves, are drawn so as to intersect with the Y axis, and the intersection points of the parallel lines of the X axis and the Y axis are the weight of the coiled steep strips.

The invention discloses an automatic measuring device for the inner wall of a cavity part. The device comprises a precession mechanism and a lead screw. The precession mechanism is in threaded connection with the lead screw, one end of the precession mechanism is provided with a driver, the other end of the precession mechanism is fixedly connected with a supporting frame, the driver can drive theprecession mechanism to rotate on the lead screw to move in an axial direction of the lead screw, and a vision measuring mechanism is arranged on the lower portion of the precession mechanism; and the driver is further provided with an encoder, and the encoder is electrically connected with the visual measuring mechanism. The specific method for measuring by using the measuring device comprises the following steps: step one, setting an initial coordinate system; step two, collecting images and calculating data; and step 3, carrying out data conversion. According to the measuring device and the measuring method, the lead screw serves as the positioning reference, mark points do not need to be pasted to the measured object in the measuring process, the mark points do not need to be removedafter measurement is completed, calculation of coordinate conversion is simplified, and three-dimensional measurement can be conducted on the inner wall of the cavity part without manual intervention.

The invention discloses a method for separating and culturing an animal bone marrow mesenchymal stem cell (MSC). The method comprises the following steps: inoculating an inoculum into an animal cell culturing medium for primary culture, and subcultring cells obtained after the primary culture to obtain the animal MSC, wherein the inoculum is a precipitate obtained after centrifuging a long bone breaking liquid, and the long bone breaking liquid is a mixture obtained by breaking in-vitro animal long bones in a buffer solution to 0.5-2mm<3> particles. The method does not comprise a collagenase digestion step or an animal long bone marrow removal step. The method has the advantages of full utilization of the marrow and sclerite, simple processing, and obtaining of enough-quantity, good-growth-state and strong-proliferation-capability MSCs within a short time, and is a convenient, fast and efficient MSC separating and culturing method.

The invention relates to a building waste brick-making production device which comprises a first box body. Two horizontal crushing rods with power devices are arranged in the first box body, a first box body feeding opening is formed in the top end of the first box body, a first box body discharging opening is formed in the bottom end of the first box body, both sides of the first box body are fixedly provided with filtering boxes respectively, the opposite sides of the two filtering boxes are respectively provided with two openings, each opening is communicated with the interior of the firstbox body, and every two openings, arranged on the same side of the first box body, are disposed at the upper end and the lower end of the crushing stick respectively, a plurality of vertical lifting rods are fixedly arranged at the bottom end of each filtering box, and the top ends of the lifting rods in the same filtering box are connected through a supporting plate in a hinged mode. Building waste in the crushing process can be uninterruptedly filtered, so that the building waste reaches the required particle size and the brick-making production is carried out. Meanwhile, iron in the building waste does not need to be manually removed by the device, so that the labor intensity is reduced and the efficiency is improved.

The invention relates to a method for preparing a binary polyacrylonitrile-based carbon fiber protofilament. The method comprises the following steps of: (1) performing copolymerization reaction on acrylonitrile and beta-ammonium itaconate for 10 to 30 hours at the temperature of between 50 and 70 DEG C by using dimethyl sulfoxide as a solvent and using azodiisobutyronitrile as an initiator, filtering, removing residual monomers, and defoaming to obtain a spinning solution; and (2) sequentially performing dry-spray wet spinning, drawing, oiling, drying densification, hot steam drawing and heat setting on the spinning solution, and thus obtaining the carbon fiber protofilament. By the method, the consumption of copolymerization monomers is reduced, and the structural regularity of polyacrylonitrile macromolecules is improved; and the prepared carbon fiber protofilament is uniform in structure, low in fineness and high in strength, and is suitable for preparing high-performance carbon fibers.