294results about How to "Stable structure and performance" patented technology

The invention discloses a cross spiral frequency selective surface (FSS) structure with dual band characteristics and a construction method thereof. The structure consists of an upper dielectric layer, a lower dielectric layer and an intermediate cross spiral FSS structure layer. The construction method comprises the following six steps of: 1, establishing structure units of the cross spiral FSS structure layer with the thickness of zero by using computer simulation technology (CST) software; 2, periodically extending the structure units towards directions X and Y to obtain the integrated 6*6 cross spiral FSS structure layer; 3, establishing the dielectric layers of the cross spiral FSS structure, and embedding the cross spiral FSS structure layer into a dielectric substrate by using the CST software; 4, capturing the cross spiral FSS structure unit from the CST software for incident wave transmittance analysis, regulating parameters of the structure unit, changing the resonance frequency of a stop band, and replacing an original structure by using the regulated structure unit; 5, setting the parameters such as boundaries and the like of the constructed cross spiral FSS structure, and testing the bandwidth stability and frequency selectivity of the structure; and 6, machining and manufacturing the cross spiral FSS structure by adopting a double-sided copper-clad plate according to an optimal size determined by the step 4.

The invention discloses a preparation method of a water-soluble nano composite material. The water-soluble nano composite material with a composite structure having a medical resonance imaging (MRI) contrastographic function and a computed tomography (CT) contrastographic function is obtained by utilizing water-soluble material having a CT contrastographic function or a water-soluble material having an MRI contrastographic function through the action of chemical agent and reaction agent, and the composite structure is a structure which is formed through electrostatic adherence or chemical bonding connection of the water-soluble material having the CT contrastographic function and the water-soluble material having the MRI contrastographic function. The preparation method has the advantages of simplicity in preparation, good controllability, high productivity, easiness in industrialized production and the like. The invention also discloses a water-soluble nano composite material which is prepared through the above method, which has the advantages of good water solubility, stable structural performance, good biological compatibility, sensitivity and accuracy in CT/MRI radiography and the like, is suitable for being used as CT/MRI double-mode medical contrast medium, and is particularly suitable for the double-mode medical imaging examination of tumor cells.

A lithium salt-graphene-containing composite material and its preparation method are provided. The composite material has the microstructure which comprises carbon nanoparticles, lithium salt nanocrystals and graphene, wherein the surface of lithium salt nanocrystals is coated with carbon nanoparticles and graphene. The preparation method comprises concentrating and drying a mixed solution, then calcinating the solid. The lithium salt-graphene-containing composite material has excellent electric performance and stability since the problem of low electric performance resulted from carbon coating on the surface of lithium salt or coating imperfection resulted from graphene coating on the surface of lithium salt is effectively solved. For the more uniform and compacted combination between graphene and lithium salt nanocrystals, the graphene will not fall off and the composite material has a high capacity ratio, energy density and conductivity. Furthermore, particle agglomeration and growing up are reduced in the process of calcination.

The invention discloses an antibacterial cellulose acetate nanofiltration membrane and a preparation method thereof. The casting film liquid, composed of 5-14% by weight of secondary cellulose acetate, 3-9% by weight of cellulose triacetated, 15-24% by weight of acetone, 1-5% by weight of maleic acid, 50-55% by weight of dioxane, 5-12% by weight of porogens that is methanol or ethanol and chemical modified nano-particle, is treated to obtain the antibacterial cellulose acetate natrium filter film after filtrating, debubbling, film flotation on the base cloth, solidifying in the gel baith and post processing. The invention brings the plasm chemical modified antibacterial nano-particle into the cellulose acetate nanofiltration membrane to make the nanofiltration membrane have a strong bacteriostasis and sterilization function, and the surface of the nanofiltration membrane is hard to absorb alga and animalcule to raise the use life and the service efficiency of the nanofiltration membrane remarkably. The antibacterial cellulose acetate nanofiltration membrane prepared based on the invention has the advantage of a steady structural properties, a strong erosion-resisting vharacteristics by animalcule and a high water flux of the film. The invention can be broadly used in the field of treatment of ground drinking water, biological pharmacy and the pretreatment of sea water desalination.

The invention relates to a novel phase change and heat insulation composite wall structure, which is applied to the heat insulation of a wall and mainly comprises a heat insulation layer, a figurate phase change layer and a wall base body to form an integrative composite structure. The heat transmission resistance of the composite wall structure can be evaluated according to the material and the thickness of the wall base body so as to figure out the material thickness of the heat insulation layer and ensure that the heat transmission resistance of the wall base body is equal to that of the heat insulation layer, so that the despicking delay effect of the phase change layer to the temperature variation is improved to the utmost extent. The composite wall structure gives full play to the heat insulation effect of the heat insulation layer and the heat storage and temperature regulation effect of the phase change layer to improve the thermal inertia of the wall body greatly. The composite wall structure has stable performance and is convenient in construction and energy-saving reconstruction of old buildings to achieve the effects of high efficiency and environmental protection.

The invention discloses a composite component of meridian tyre cord fabric layer and air barrier and a preparation technology. Base material rubber, an aging-proof system, a reinforcing system, a vulcanization system and a radiosensitizer are mixed at a ratio to form a mixture; the rubber mixture is mixed to smelt in an internal mixer to be prepared into a tyre body cord fabric layer component and a lining air barrier component respectively according to the production technology of the tyre body cord fabric layer and the lining air barrier component; then the tyre body cord fabric layer component and the lining air barrier component are compounded into an integral composite component on a compound machine; an electron accelcrator is used for radiating the composite component; under the condition of limited-oxygen radiation, radiation prevulcanization is carried on the composite component of the tyre cord fabric layer and the lining air barrier. The composite component of the tyre cord fabric layer and the air barrier, which is radiated by the invention, has high Green strength, stable structure size and performance, saves raw material, has small radiation dose and high production efficiency and is favourable for environment protection.

The invention relates to a catalyst for preparing a 1,2-glycol by epoxy compound through hydration as well as a preparation method and an application thereof. A beta zeolite molecular sieve is used as a raw material and then is subjected to acid treatment, and active centered metal is introduced through roasting; and the preparation method comprises the steps of mixing the beta zeolite molecular sieve after acid treatment with an organometallic compound precursor according to the proportion, and roasting. The method can solve the problems of high water ratio, high energy consumption and environment pollution caused by a production process in the traditional process; and the catalyst carrier is cheap and easily available, the preparation process of the catalyst is simple and has good stability, and the catalyst has excellent catalytic activity and the good selectivity in the glycol preparation process by the epoxy compound under a mild condition, and can be applied to glycol industrial production through epoxy compound hydration.

The invention discloses a method for preparing polyamidoxime/graphene nanobelt composite aerogel and separating and enriching uranium, which is characterized by comprising the following steps of: firstly, axially cutting a multiwalled carbon nanotube by using a potassium permanganate oxidation method to prepare a graphene oxide nanobelt; then adding into a mixed solution of acrylonitrile and ammonium persulfate which are fully mixed, and primarily preparing polyacrylonitrile/graphene nanobelt composite hydrogel by adopting a solvothermal polymerization method; and then converting cyano groupsinto amidoxime groups by virtue of a reaction between the cyano groups and hydroxylamine under an alkaline condition so as to obtain polyamidoxime/graphene nanoribbon composite hydrogel, and finally,carrying out low-temperature freeze drying so as to obtain the polyamidoxime/graphene nanoribbon composite aerogel. The prepared polyamidoxime/graphene nanobelt composite aerogel is high in grafting rate, uniform in density distribution, stable in structural performance and rich in special functional groups of uranium, the uranium can be effectively and selectively removed from different uranium-containing water bodies, the adsorbed aerogel can be rapidly separated and recycled from a solid-liquid system, and no pollution is caused to the environment.

The invention discloses a nickle-cobalt-aluminium anode material used for a lithium ion battery with a long cycle life and a high specific capacity and a preparation method thereof. The chemical formula of the anode material is Li1.05Ni1-x-yyCoxAlyMgzO2.wAl2O3, where x, y, z, w are mole numbers, x is more than or equal to 0 and less than or equal to 0.2, y is more than or equal to 0 and less thanor equal to 0.1, x+y is more than or equal to 0 and less than or equal to 0.2, z is more than 0 and less than or equal to 0.02, w is more than 0 and less than or equal to 0.02, Mg is a doped element,and Al2O3 is a cladding layer oxide of the nickle-cobalt-aluminium anode material with long cycle life and high specific capacity. According to the invention, on the premise of keep a relatively highspecific discharge capacity, the cycle performance of the lithium ion battery nickle-cobalt-aluminium anode material can be greatly improved, and excellent electrochemical performance can be presented. Cheap metal materials such as Mg and Al are introduced in the preparation process of the nickle-cobalt-aluminium anode material, the cost is low, the preparation process is simple, and the problem of short cycle life of the nickle-cobalt-aluminium anode material can be improved to a great extent.

The invention discloses a fluorination grapheme-lithium vanadium phosphate composite material, as well as the preparation method and the application thereof. The preparation method for the fluorination grapheme-lithium vanadium phosphate composite material comprises the steps as follows: obtaining grapheme; mixing the grapheme with vanadic oxide, villiaumite, phosphate and lithium to form a mixture; calcining and cooling the mixture in the oxygen-free environment to obtain the fluorination grapheme-lithium vanadium phosphate composite material. The preparation method for the fluorination grapheme-lithium vanadium phosphate composite material has a simple technology, is low in cost and contamination-free, and is suitable for industrialized production. The fluorination grapheme-lithium vanadium phosphate composite material prepared through adopting the method has stable structural performance and high electric conductivity, and has high power density when applied for preparing a lithium ion battery or/and anode material of a capacitor.

The invention discloses a preparation method of chalcogenide glass tapered fibers. Chalcogenide glass fibers are tapered by the aid of accurate temperature control of a specific electric-heating coil and traction of a precision stepping motor, important parameters such as taper zone lengths, taper zone outer diameters and the like of the tapered fibers are controlled through control on the heating temperature and the tapering traction speed, and the chalcogenide glass tapered fibers with different taper zone lengths and taper zone outer diameters are drawn accurately. The method is simple in technology, high in operability, good in repeatability and high in accuracy and can effectively solve problems that the chalcogenide glass fibers are broken easily during tapering, fiber core diameters and taper zone lengths are difficult to control accurately and the like, the fiber core diameters of the prepared chalcogenide glass tapered fibers with nanoscale or submicron diameters range from 700 mu m to 1,000 mu m, the taper zone lengths range from 3 cm to 7 cm, the production cycle is short, the success rate is high, the chalcogenide glass tapered fibers can be applied to new technical fields of coupling of micro-waveguides, generation of super-continuum spectrum and the like, and research and application fields of the chalcogenide glass tapered fibers are greatly extended.

The invention discloses a piece of sponge abrasive paper comprising a sponge layer, an applying glue layer, a bottom glue layer, an abrasive layer and a composite glue layer. The sponge abrasive paper further comprises a polyurethane film layer; the polyurethane film layer is attached to the sponge layer via at least one applying glue layer; the abrasive layer is attached to the polyurethane film layer via the at least one bottom glue layer and the at least one composite glue layer covering the bottom glue layer. The sponge abrasive paper is two-layered base material with an upper sponge base material layer and a lower thin film base material layer. Compared with products of the same kind on the market, the sponge abrasive paper is characterized by high elasticity, super softness, stability, durableness and free grinding scratches.

The invention relates to a desulfurization and denitration system by an ozone oxidation double-tower ammonia method. The desulfurization and denitration system sequentially comprises a hydrogen peroxide spraying device, a draught fan, an ozone spraying device, a flue gas mixing device, a front adsorption tower, a rear adsorption tower, a cyclone separator, a centrifugal separator and a drier, wherein the hydrogen peroxide spraying device is arranged at an outlet of a boiler coal economizer, the outlet of the boiler coal economizer is connected to the draught fan through an air preheater and a dust remover and is connected to the front adsorption tower; the ozone spraying device is mounted in front of an inlet flue of the front adsorption tower; and the flue gas mixing device is arranged between the ozone spraying device and the inlet flue of the front adsorption tower. The desulfurization and denitration system disclosed by the invention has the beneficial effects that the integration degree of a technology is high, the desulfurization and the denitration are integrated, the double-tower structure are stable in properties, the desulfurization efficiency and the denitration efficiency are high, the source of an adsorption tower machine is reliable, the added value of by-products is high, little secondary pollution exists, and the operation cost is low.

The invention relates to a local oxygen-enriched combustor for a cement kiln furnace. Through the arrangement of an oxygen-enriched air passage outside an axial flow air passage of the combustor and the arrangement of a spray nozzle at an outlet of the oxygen-enriched air passage, the spray nozzle is arranged at the lower part of the outer side circumference of the air flow air spray nozzle and is near the clinker or analogue side, so the local concentration of the oxygen gas at the contact side of the lower part of the combustor and the oxygen-enriched air passage is raised, the combustion speed of the fuel can be accelerated, the local heat accumulation is directly caused, the adjacent fuel also begins to combust along with the proceeding of the diffusion, heat transfer and heat radiation processes, the temperature of the direct contact side of the clinker or analogue of a rotary kiln with the oxygen-enriched air passage is obviously raised, and the response to the raw material mass fluctuation caused by proportioning can be realized. In addition, a center angle corresponding to a distribution region in the circumferential direction is set to be smaller than or equal to 270 degrees, the angle range can completely cover the region of the fuel and the cement clinker or analogue rotating along with the rotary kiln, and the use precision and the economization of oxygen-enriched air can be ensured.

The invention discloses a metal-organic framework material for separating xenon and krypton and a method for separating xenon and krypton. The metal-organic framework material is good in stability andhigh in adsorptive separation selectivity, the preparation method is simple, and the preparation cost is low. The general structural formula of the metal-organic framework material is [M(C4O4(OH)2).3H2O or [M(C4O4)].2.5H2O, wherein M is metal ions, and transition metal ions or alkaline earth metal ions and squaric acid form a 3D network structure through coordinate bonds or intermolecular actingforce. A preparation method comprises the steps as follows: (1) inorganic salt, squaric acid, alkali and deionized water are mixed in proportion, and the obtained mixture is put in a reactor for a hydrothermal reaction after being stirred to be dissolved, wherein the inorganic salt comprises chlorate, nitrate, acetate, carbonate, sulfate or perchlorate of metal ions; (2) after the hydrothermal reaction, a product is washed with deionized water multiple times, vacuum drying is performed, and the metal-organic framework material is obtained. The metal-organic framework material is used as an adsorbent to perform adsorptive separation on mixed gas containing xenon and krypton.

The invention discloses an ECC assembly integrated building structure construction method. The method includes following steps: prefabricating an ECC formwork shell of corresponding beam, column and plate components in a building structure according to a building drawing of a design unit; fixing the ECC formwork shell of the corresponding beam, column and plate components on the outer side of a rebar cage in a sleeving manner; pouring regenerated concrete into the prefabricated ECC formwork shell, and performing maintaining. A structural form that a thin shell prefabricated by high-performance ECC is filled with the regenerated concrete is adopted to form an assembly integrated structure with regenerated concrete constraining effect so as to replace an assembled system and a mode of casting of common concrete in situ, the environment problem caused by storing and accumulating of discarded building waste and the problem that the regenerated concrete cannot be used for a load bearing structure solely are solved, influence of artificial factors on project quality is avoided effectively from two aspects of material itself and construction method, and the ECC assembly integrated building structure construction method is a novel environment-friendly building structure construction method.

The invention provides a laminated wood floor of a prestressed structure. The floor is formed by bonding at least an upper medium-density fiber board and a lower medium-density fiber board at high pressure and low temperature. At least one spatially structured high-elasticity plastic component is clamped between the upper medium-density fiber board and the lower medium-density fiber board. The high-elasticity plastic component is embedded in a groove which is arranged in at least one medium-density fiber board; the high-elasticity plastic component is a spatially structured frame composed of a longitudinal rib and a horizontal rib, and the longitudinal rib and the horizontal rib form an radian which bulges upwards or downwards, and the high-elasticity plastic component is arranged between the upper medium-density fiber board and the lower medium-density fiber board to form a core board. The laminated wood floor has the advantages of good structural strength and stable structural properties, effectively ensures that the floor is not affected by environmental change during use, prolongs the service life, provides possibility of mass product processing, greatly saves wood resources, reduces the cost and the like.

The invention discloses a meridian tire wire loop component and the manufacturing process thereof. Rubber base material, an anti-aging system, a reinforcement system, an adhesion system, a vulcanizing system and radio sensitizer are mixed in proportion to make a mixture. The rubber mixture is compounded in a banbury mixer. Glue is applied on a coppered steel wire based on the manufacturing technology of the tire wire loop to make the glue-coated steel wire band for meridian tire. An electron accelerator is used for producing a beam current to irradiate the glue-coated steel wire band of the meridian tire under the effect of a constant tension traction apparatus. The meridian tire wire loop component is vulcanized under the condition of luminous irradiation. After being irradiated, the crude rubber of the meridian tire wire loop component has strong Green strength and stable structural size and performance. Furthermore, steel wire withdrawal force is improved and the adhesive strength of the adhesive layer of a steel wire loop is enhanced, so the quality of a tire is improved. In addition, irradiation dose is small, the manufacturing cycle of products is shortened and production efficiency is high, thus being beneficial to environmental protection.

The invention discloses a preparation method of polytrimethylene terephthalate fiber with shape memory characteristics, including: firstly, selected polyester polymer is provided with at least 0.8dL/g of intrinsic viscosity and contains at least 85mol percent of polytrimethylene terephthalate, wherein, at least 85mol percent of the repeating unit is composed of three-methylene; secondly, the polyester polymer is melted and transported through a screw melting extruder, the melting body is metered through a metering pump and is extruded out through a spinneret, and as-spun fibers are drafted successively through a pair of drafting hot rollers after being cooled through lateral blowing; thirdly, the drafted fibers are introduced into a group of grouping roller stereotype boxes with steam; fourthly, tow is introduced into a winding head to be winded into mold. The fiber made through the invention has the advantages of good packaging appearance forming, good structural stability and soft handle. And with lower modulus, the fiber is still provided with good elasticity and tensile recoverability. The textiles made of the fiber which are produced through the process are provided with good shape memory characteristics.

The invention relates to tunnel construction machinery, and discloses an expressway tunnel groove integral lining trolley, which comprises a top mold assembly, a side mold assembly, a hydraulic system, a walking system and an electric system, wherein the walking system is driven by the hydraulic system to move on a steel rail, and the top mold assembly is erected on a gantry table beam through a top mold upright post frame and is driven by a jacking oil cylinder arranged on a gantry cross beam; the gantry table beam is arranged on the gantry cross beam through a middle jack frame, a plurality of side mold lead screws and reinforced lead screws are hinged between the side mold assembly and the gantry upright posts arranged at the two ends of the gantry cross beam; the lower side of the side mold assembly is hinged to side mold support feet, and a groove bottom plate and a filling mold used for integrally forming the tunnel bottom surface are arranged under a pad plate. The invention aims at providing the expressway tunnel groove integral lining trolley with the advantages that the integral construction between the tunnel wall and the tunnel bottom surface is realized, the construction period is shortened, the material and labor waste is avoided, in addition, the structural performance is stable, and the integral performance is good.

The invention relates to an alkaline polymer electrolyte membrane and a preparation method thereof, in particular to a method for preparing an alkaline polymer electrolyte membrane by preparing a quaternary random copolymer from styrene, 4-chloromethyl styrene, an alkyl acrylate monomer and an acrylic ester monomer as raw materials, and carrying out quaternization or quaternary phosphonium reaction and membrane forming. In the invention, the 4-chloromethyl styrene is directly adopted and chloromethyl ether is not used, thereby solving the problems of the additional crosslinking of methylenem, the pollution of a metal catalyst and the like. The prepared alkaline polymer electrolyte membrane has stable structural performance and good electrochemical stability, and the conductivity of the alkaline polymer electrolyte membrane reaches 10-3S/cm.

An automobile brake lining is prepared from, by weight, 14%-18% of ceramic fibers, 3%-6% of carbon fibers, 3%-7% of cellulose fibers, 8%-13% of aramid fibers, 8%-13% of modified phenolic resin, 2%-4% of aluminium oxide, 3%-5% of barium sulphide, 6%-9% of graphite, 4%-6% of zirconite, 8%-12% of quartz sand, 1%-2% of bauxite, 1%-2% of zinc oxide, 2%-4% of chemigum, 1%-4% of antimony sulfide, 7%-10% of friction powder and 6%-9% of nanometer silicon carbide. According to the automobile brake lining, a ceramic brake pad is kept to be stable in braking, low in noise and the like, the mechanical strength of the brake lining is further improved, and the service life of the brake lining is prolonged; meanwhile, recession and expansion of the high temperature can be avoided, and the automobile brake lining has the advantages of being good in braking performance and abrasion resistance, stable in braking, less in dust, moderate in hardness and good in high temperature recovery performance.

The invention discloses a preparation method of N-lauroyl-L-alanine. The preparation method comprises the following steps: preparing L-alanine salt, preparing pasty N-lauroyl-L-alanine salt, and preparing an N-lauroyl-L-alanine crude product and the like. The invention further provides application of amino acid in the daily chemical field and industries such as agriculture and medicines. The aminoacid provided by the invention has high performance, and has an obvious effect in the aspects of bacterium inhibition, pesticide removal, peculiar smell elimination and the like.