36results about How to "No loss of mechanical strength" patented technology

The invention discloses a preparation method and preparation device of a porous medium composite phase-change material. The method and device can be used for packaging a low-temperature organic phase-change material by a porous propping material to obtain the high-airtightness composite phase-change material. The preparation method comprises the following steps: carrying out vacuum treatment on a porous propping material; preparing an organic precursor solution; preparing a packaging substance emulsion; compounding the packaging substance emulsion and porous propping material; and drying and curing to form the porous medium composite phase-change material. The preparation device comprises a phase-change substrate emulsification container, a liquid automatic sampler, a packaging composite container, a vacuum pump and a temperature controller. The porous medium composite phase-change material prepared by the preparation method has the advantages of firm packaging, low leakage tendency, convenient manufacturing process, simple technique, favorable economy and high applicability.

The invention discloses a preparation method of high-elasticity high-strength double-crosslinking porous hydrogel, which comprises the following steps: preparing acrylic acid, a hydrophilic monomer, achemical crosslinking agent, an initiator and a solvent into a prepolymer solution; adding a pore-foaming agent into the pre-polymerization solution until the pre-polymerization solution is in a saturated filling state; transferring the saturated filled prepolymer solution into ultraviolet to initiate polymerization to obtain chemical cross-linked hydrogel; and soaking the chemically crosslinkedhydrogel in an iron ion solution, and carrying out physical crosslinking to obtain the double-crosslinked porous hydrogel. The method is simple and easy to implement and is free of special equipment;the porous hydrogel prepared through the method has the characteristics of high elasticity and high strength; in addition, the original mechanical strength of the porous hydrogel can be rapidly recovered under the room temperature condition after the porous hydrogel is fatigued and the good anti-fatigue characteristic is achieved. The product has important application prospects in the fields of artificial muscle, environment treatment materials, flexible electronics and the like.

The invention provides plated fiber, carbon fiber, wire harness and a plating method. A plated fiber that is obtained by applying a metal plating onto a fiber having an elongation percentage which is more than or equal to 1% and less than or equal to 10%. An elongation percentage of the metal plating is higher than the elongation percentage of the fiber. A carbon fiber wherein the surface oxygen amount as a value obtained by dividing an O1S peak intensity measured by X-ray photoelectron spectroscopy by a C1S peak intensity measured by the spectroscopy is more than or equal to 0.097 and less than or equal to 0.138.

The subject of the present invention is a composition comprising at least, in % expressed by weight relative to the total weight of composition, from 0.01 to 3% of polycarboxylic acid or one of the salts of said polycarboxylic acid comprising from 2 to 4 carboxyl groups per molecule; and from 97 to 99.99% of a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF clinker).

By setting the wall thickness on the long axis L as in the past, there is no loss of mechanical strength, and since the wall thickness in the area from the long axis L to the diagonal axis D is equal to the wall thickness on the long axis L and the diagonal axis D The difference in wall thickness between them is within 0.3mm, and they are formed approximately the same in the shape of the cone, and the wall thickness difference between the wall thicknesses on the minor axis S is within 0.3mm, which is approximately the same in the shape of the cone. The wall thickness region is formed within the range from 90°-(d+α)° to the minor axis S, so that the weight can be reduced.

The invention relates to additives for a hydraulic binder based on a belite-calcium-sulphoaluminate-ferrite clinker. A composition includes at least, in % expressed by mass relative to the total mass of the composition, from 0.01 to 3% of polycarboxylic acid or salts thereof, the polycarboxylic acid including 2 to 4 carboxyl groups per molecule; and from 97 to 99.99% of a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF clinker).

The invention discloses a lithium battery using a lightweight current collector, which comprises a positive electrode sheet, a diaphragm, and a negative electrode sheet in a stacked or wound manner, the positive electrode sheet includes a positive electrode collector, and the negative electrode sheet includes a negative electrode sheet. Fluid, the positive electrode current collector and / or the negative electrode current collector are composed of a conductive film base layer and a metallized film layer, the thickness of the conductive film base layer is 5 to 20 μm, and the conductivity of the conductive film base layer is 1 to 100 s / cm, the thickness of the metallized film layer is 0.2-2 μm, the metallized film layer of the positive electrode current collector is an aluminum layer or a nickel layer, and the metallized film layer of the negative electrode current collector is a copper layer, an iron layer and a tungsten layer one of the layers. In the present invention, the positive electrode current collector and / or the negative electrode current collector are composed of a conductive film base layer and a metallized film layer, wherein the conductive film base layer is prepared from a polymer substrate, so as to effectively reduce the current collector while realizing the current collector function. The quality of the collector achieves the purpose of reducing the weight of the current collector.

Wall thickness on a major axis L is set to the same value as before to prevent mechanical strength from being impaired. Furthermore, the wall thickness of a region from a major axis L to a diagonal axis D is made almost the same in molding the funnel with the wall thickness difference of 0.3 mm or less between the wall thickness on the major axis L and that on the diagonal axis D, and a uniform wall thickness area of almost the same wall thickness in molding the funnel with the wall thickness difference of 0.3 mm or less from the wall thickness on a minor axis S is formed over the range of the minor axis S from 90 DEG -(d+alpha ) DEG. The weight can thereby be reduced.

The invention discloses a preparation method for a composite resin system copolymerized by silicon dioxide and epoxy resin and compatible with liquid oxygen. The preparation method comprises the following steps: 1, subjecting glycidyl ether epoxy resin and silane to a reaction so as to prepare silane modified epoxy resin; 2, subjecting a phosphorus-containing antioxidant substance and silane to a reaction so as to prepare a silane modified antioxidant; 3, mixing the silane modified epoxy resin, the silane modified antioxidant and a silicon dioxide precursor, dissolving the mixture into a solvent, and carrying out heating to 40 to 60 DEG C; and 4, adding deionized water and a catalyst, carrying out a reaction for 1 to 5 hours, and carrying out decompressing so as to remove product water and the solvent. According to the invention, a nanometer silicon dioxide unit and antioxidant molecules are covalently introduced into the epoxy resin system, and well-known mechanical strength may not be decreased after introduction, so the antioxidant may not be precipitated and leaked out of a resin substrate; and through the introduction of the silicon dioxide unit, the toughness of the cured resin is significantly improved, and the use safety of the epoxy resin used as a substrate material of a liquid oxygen storage tank is greatly improved.

The invention provides a halogen-free flame-retardant resin and a preparation method thereof. The halogen-free flame-retardant resin comprises the following components in parts by weight: 100 parts of polyamide 56, 5-20 parts of organic halogen-free flame retardant, and 5-20 parts of glass fiber 40 parts, lubricant 0.05-0.5 part, antioxidant 0.05-0.5 part. The halogen-free flame-retardant resin of the present invention not only adopts renewable substances as main raw materials, is environmentally friendly, but also has good flame-retardant properties and mechanical properties.

The invention discloses an artificial grain spraying method for a solid wood board, which comprises the following steps of: (1) manufacturing a template; (2) engraving a mold; (3) selecting a base board; (4) mixing color; (5) pressing the mold and spraying; (6) removing the mold and curing the coating; and (7) spraying transparent paint on the surface of the coating. The solid wood board painted with the artificial grain through the steps can be widely applied to decoration of indoor floor boards, wall boards and roofs. The artificial grain spraying method disclosed by the invention has a simple and convenient process and high applicability, does not influence the mechanical strength of the base board body, can be used for spraying various grains on the surface of the base board, ensures that the bonding strength between the sprayed pattern grains and the base board is high, overcomes the deficiency of simplex property of the traditional floor pattern, enlarges the using range of woodof trees with simplex grains, and improves the additional value of products.

The invention discloses a flame retardant plastic shell for a capacitor. The flame retardant plastic shell is prepared from, by weight, polybutylene terephthalate, ABS plastic, a filling agent, color master batch, dimethyl trimethylsilylmethylphophonate, polyvinyl chloride resin, a lubricant and a flame retardant. The prepared plastic shell for the capacitor is good in mechanical performance, high in flame retardance, good in processability and low in cost and melt viscosity.

The invention discloses a nontoxic and harmless hemicellulose foam composite material and a preparation method thereof. The method comprises the following steps: (1) dissolving hemicellulose in water, heating and stirring until dissolved to obtain a hemicellulose solution, dissolving a crosslinking agent and citric acid in the hemicellulose solution to obtain a mixed solution; (2) dissolving PVA Dissolving in water, heating and stirring to dissolve to obtain a PVA solution; (3) mixing and stirring the mixed solution and the PVA solution to obtain a cross-linked product, cooling and forming, washing and drying to obtain the foam composite material. The foam composite material is easy to process, has excellent mechanical properties, good recovery, and high heat resistance, and has broad application prospects in functionalized materials based on foam porous materials, such as shock-resistant and compression-resistant materials. In addition, the foam material has no residue of toxic and harmful substances, so it also has great application potential in materials related to human health, such as tissue engineering materials and biomedical materials.

The present invention relates to a device for fixing and adjusting the position of the spine in spinal surgery, which comprises two interdigitated substantially rod-shaped implant elements. In order to lock the implant elements together, the device (1) also includes four generally parallel elongated elements (B, C, D, E) extending into a plane passing through two of them, their The ends are generally located at the corners of a parallelogram, preferably a square. The ends of the elongated elements are joined to each other in pairs by means of mutually parallel partial hoops (7, 9; 8, 10) bent outwards from the ends of the elongated elements, wherein at the ends of the elongated elements A pair of partial hoops (7, 9) at one end are perpendicular to the pair of partial hoops (8, 10) at the other end of the elongated element, wherein each pair of partial hoops attaches the rod-shaped implant element (5, 6, 11a, 17) and each adjacent intersecting rod-shaped member, wherein those sides (13, 14, 13', 14'; 15, 16, 15', 16 ′) are substantially flat and substantially parallel to respective opposing sides of adjacent elongate members when fixing and adjusting the position of the spine.

The invention provides a plated fiber, a carbon fiber, a wire harness and a plating method. The plated fiber is obtained by applying a metal plating onto a fiber having an elongation percentage whichis more than or equal to 1% and less than or equal to 10%. An elongation percentage of the metal plating is higher than the elongation percentage of the fiber. A carbon fiber wherein the surface oxygen amount as a value obtained by dividing an O1S peak intensity measured by X-ray photoelectron spectroscopy by a C1S peak intensity measured by the spectroscopy is more than or equal to 0.097 and lessthan or equal to 0.138.

The invention discloses an implant material for promoting bone wound healing and a preparation method thereof, and relates to the technical field of medical materials. The orthopedic implant material consists of a polylactic acid matrix and a medical magnesium alloy skeleton suspended in the polylactic acid matrix. The medical magnesium alloy The skeleton is composed of multi-layered wavy network structures made of medical magnesium alloy wires. The surface of the polylactic acid matrix is ​​decorated with a porous hydroxyapatite layer, and the micropores of the hydroxyapatite layer are filled with Dan Phenolic acid B microcapsules and vancomycin microcapsules. The orthopedic implant material of the present invention has good biocompatibility, large specific surface area and high porosity, is suitable for the growth of new bone cells, promotes the bridging and healing of broken ends of fractures, and has the stability of fixation force during the bridging and healing of broken ends of fractures Strong, can prevent secondary fractures; in addition, it can maintain the effective concentration of salvianolic acid B and vancomycin in the drug receiving system for a long time, play a role in continuous anti-inflammatory and promote the bridging and healing of fracture ends.

The invention discloses an automobile hub machining device. The automobile hub machining device comprises linear cutting equipment, the linear cutting equipment comprises a working platform, a horizontal sliding groove is formed in the working platform, and a sliding block is arranged inside the sliding groove in a sliding mode; the linear cutting equipment further comprises a supporting verticalrotating shaft, and the lower end of the vertical rotating shaft is rotationally arranged on the sliding block; the top pf the vertical rotating shaft is fixedly connected with a linear cutting platform in a horizonal posture in a supporting mode; the contour of the linear cutting platform is a gear contour, and the gear contour of the linear cutting platform is consistent with the contour of an outer ring of a rim disc after the linear cutting is completed; and a plurality of limiting columns are vertically arranged on the upper surface of the linear cutting platform, and the plurality of limiting columns are distributed in a circumferential array mode. The rim disc to undergo linear cutting is of a rotary body structure with a simple structure, the heat treatment and other processes of the rim disc are simple, carrying out linear cutting forming on the basis of the rim disc to undergo linear cutting belongs to cold machining, so that the deformation of other parts does not occur, themachining precision is high, and the mechanical strength of a material of the rim disc cannot be damaged in the process.