173results about How to "Uniform and stable structure" patented technology

The invention discloses a method for preparing ZrO2 aerogel. The method sequentially comprises the following steps of: (1) dissolving a zirconium inorganic salt into an alcohol aqueous solvent, then sequentially adding a chelating agent, a drying control chemical additive and an epoxide and stirring for mixing; (2) carrying out a water bath on the obtained sol; (3) sequentially ageing, cleaning and soaking the sol subjected to the water bath; (4) drying the substance obtained in the step (3); and (5) carrying out heat treatment on the substance obtained in the step (4) at 400-700 DEG C for 3-8 hours to obtain the ZrO2 aerogel. In the invention, the specific surface area of the prepared ZrO2 aerogel is 400-800m<2> / g, the density is 100-500kg.m<-3>, the pore size distribution is narrow, and the ZrO2 aerogel is a nano scale. The ZrO2 aerogel has uniform and stable structure and can be widely applied to the fields of heat insulation, catalysis, environmental protection, and the like.

A method to produce a conductive transfer roller, and the transfer roller. The method to produce the conductive transfer roller includes adding and mixing a conductive substance, an ionic conductive agent, a vulcanizing agent, and a blowing agent and at least one of elastic materials selected from a group consisting of EPMD (ethylene propylene) rubber, NBR (acrylonitrile butadiene) rubber, ECO (epichlorohydrin ethylene oxide) rubber, and CR (chloroprene rubber), extruding the compound, blowing the extruded material by passing it through a continuous mobile foaming device, pressing the foam onto a shaft and applying a secondary curing, and grinding the foam to a desired thickness.

The invention discloses a gold micro-nano composite structure array and a preparation method thereof. The array is a gold bowl array or a gold hollow sphere array disposed above a gold film covered on a substrate, wherein the diameter of a gold bow opening is from 500 nanometers to 10 micrometers, a bowl wall is composed of gold rods, the lengths of the gold rods are 100-1000 nanometers, the diameters of the gold rods are 50-400 nanometers, the inner diameter of a gold hollow sphere is from 500 nanometers to 10 micrometers, a sphere casing is composed of gold particles with diameters of 50-600 nanometers, and the thickness of the gold film is 5-25 nanometers. The preparation method includes sputtering a layer of the gold film on the substrate, placing a single layer colloidal crystal template which is composed of polystyrene colloidal spheres with diameters from 500 nanometers to 10 micrometers on the substrate which is covered with the gold film, then placing the substrate covered with the gold film and the colloidal crystal template into a chloroauric acid solution with concentration of 0.3-0.7g / L, using the solution with the substrate as a working electrode, subjecting the mixture to electro-deposition for 2-8 hours under the deposition electric current density of 0.03-0.05mA / cm<2> or 0.15-0.45mA / cm<2> to obtain a complex array, and placing the complex array in a dichloromethane solution for to removing the polystyrene colloidal spheres to obtain target products. The gold micro-nano composite structure array can be used as a surface enhanced raman scattering active substrate.

The invention provides a nano-composite material with a molybdenum trioxide@molybdenum disulfide core-shell heterostructure, and a preparation method and an application thereof. The preparation methodcomprises the following steps: adding sodium molybdate and hydrochloric acid into redistilled water, used as a reaction solvent, in a closed high-temperature and high-pressure reactor, heating the reaction system to produce a high-temperature and high-pressure environment in order to prepare a nano-ribbon molybdenum trioxide precursor, adding the nano-ribbon molybdenum trioxide to redistilled water used as the reaction solvent, adding thiourea and hydrochloric acid, and heating the reaction system to generate high-temperature and high-pressure environment in order to prepare the three-dimensional porous sheet molybdenum oxide-molybdenum disulfide core-shell heterostructure nano-composite material. Compared with nano-composite materials in the prior art, the nano-composite material in theinvention has the advantages of high purity, good and controllable dispersibility, low production cost, good reproducibility, large specific surface area, facilitation of the infiltration of an electrode material with an electrolyte, and great potential application values in the energy storage field.

The invention discloses a formulation of an AC zinc oxide resistance chip. The formulation is characterized by comprising the following additives and a main material ZnO by weight percentage: 4.0 to 4.9 percent of Bi2O3, 3.0 to 4.0 percent of Sb2O3, 0.5 to 1.0 percent of SiO2, 2.0 to 3.0 percent of Co2O3, 0.50 to 0.80 percent of Cr2O3, 0.50 to 0.80 percent of MnCO3, 0.70 to 0.90 percent of NiO, 0.03 to 0.05 percent of aluminum nitrate, 0.10 to 0.20 percent of glass dust, 0.07 to 0.10 percent of B2O3 and 85.0 to 88.0 percent of ZnO. The formulation of the resistance chip has the following characteristics and advantages: the nickel protoxide and the glass dust are introduced into the formulation, so that the stability and the aging performance of the internal structure of the resistance chip is more excellent; and 2, dosage of cobalt sesquioxide, dibismuth trioxide and diantimony trioxide are added in the formulation, the mixture ratio of each composition is more reasonable, and the non-linearity coefficient of the resistance chip can be improved, the pressure ratio is reduced, the circulation capability is improved, and the comprehensive performance is excellent.

The invention discloses hierarchic porous La2Zr2O7 ceramic and a preparation method thereof. The hierarchic porous La2Zr2O7 ceramic comprises micro-mesoporous and macro-pore binary oxides, wherein the aperture of the micro-mesopores is 1-5nm; the aperture of the micro-pores is 0.5-5mu m; the specific surface area is 43-150m<2> / g. The preparation method comprises the following five steps: preparing a precursor solution; preparing sol and gel, ageing, drying and roasting at a high temperature. The preparation method disclosed by the invention has the advantages of low cost, low energy consumption, simple process, no corrosion to equipment, no pollution to the environment and the like, and the prepared hierarchic porous La2Zr2O7 ceramic has the characteristics of high specific surface area, stable structure, no phase change between room temperature and the melting point, good high-thermal resistance, sintering resistance, vapor resistance and resistance to strong acid corrosion, and the like, and is applicable to the fields such as high-temperature catalysis, combustion and chemical separation.

The invention provides a strengthening-toughening modification type nano monofilament silk fiber and a preparation method thereof. The strengthening-toughening modification type nano monofilament silk fiber comprises 0.3-0.4% of oxidized graphene, 0.8-1.2% of nano-titanium dioxide particles, 80-85% of fibroin and the balance other substances. The preparation method particularly includes adding titanium dioxide sol into a fibroin solution with stirring sufficiently, and adding an oxidized graphene solution and a thickener sequentially so as to obtain a spinning solution; disposing the spinning solution into an electrostatic spinning injector and regulating voltage, distance and rotating speed of a receiver which is a rotary sticklike object so as to obtain a primary nano monofilament silk fiber; soaking the primary nano monofilament silk fiber into aqueous ethanol for pre-crystallization, and performing thermal treatment so as to obtain the nano monofilament silk fiber. The preparation method is simple, the nano monofilament silk fiber can be obtained by the rotary sticklike receiver through the electrostatic spinning technology, and the strengthening-toughening modification type nano monofilament silk fiber can be obtained by addition of the nano-particles and the oxidized graphene into the fibroin.

The invention provides a carbon material adopting a Zr-MOFs composite material as a template. Aminoterephthalic acid, ZrCl4 and carboxylated graphene are subjected to hydrothermal synthesis, and an obtained product is subjected to heating and carbonization treatment, so that the carbon material can be obtained; and the specific surface area of the carbon material ranges from 1000 to 1973 m<2>g<-1>. A preparation method of the carbon material includes the following steps that: (1) mixing and ultrasonic treatment is performed on aminoterephthalic acid, ZrCl4 and carboxylated graphene; (2) an obtained mixture is subjected to hydrothermal synthesis, so that a composite material UiO-66-NH2 / carboxylated graphene composite material can be synthesized; (3) the composite material is subjected to heating and carbonization treatment, so that a product can be obtained; and (4) the product is washed and dried, so that the porous carbon material can be obtained. As indicated by an electrochemical performance test performed on the carbon material, when the carbon material is used as a supercapacitor electrode material, the current density of the carbon material is 0.15Ag<-1>, the specific capacitance value of the carbon material ranges from 150 to 300Fg<-1>, and therefore, the carbon material of the present invention has a wide application prospect in the fields of carbon materials, particularly supercapacitors.

The invention relates to an industrial polyester filament for a high-strength ultra-low-elongation safety belt and a production method of the industrial polyester filament. The production method comprises the following steps of: A) high-viscosity polyester chip preparation; B) high-viscosity polyester chip impurity removal; C) melt spinning; and D) drafting, heat setting and winding. The number of the industrial polyester filaments produced by adopting the method is 72-144F, the fineness is 1100-2222dtex, the breaking strength can reach more than 7.80cN / dtex, the fixed-load elongation can reach 4-6 percent under a condition of 11.1KN and the controllable oil content is lower than 0.30-0.60 percent. The industrial polyester filament for the high-strength ultra-low-elongation safety belt and the production method of the industrial polyester filament have the beneficial effects that the breaking strength of the safety belt which is provided by using the obtained industrial polyester filaments can reach 35KN and is much higher than the breaking strength being 28-33KN of the existing safety belt, the physical and mechanical performance is good and the industrial polyester filament is an optimum raw material for producing front-row safety belts; the weaving performance is good, the dyeing uniformity of the safety belt is good due to lower fiber oil content, the gloss is stable, and chromatic aberration and stains do not exist; the waste polyester fibers can be recycled, the energy is saved, the environment is protected and the operating cost is reduced; and the operation is simple to conduct, the process flow is short, the automation level is high and the development space is very great.

The invention discloses a polysulfonate separation membrane and a preparation method thereof. Casting solution of the polysulfonate separation membrane is prepared from the following components in mass ratio: the mass ratio of membrane preparation raw material, solvent, nonsolvent and modified additive is (10-20):(50-85):(5-25):(0-15). The preparation method of the polysulfonate separation membrane comprises the following steps: preparing the casting solution; preparing the membrane by a nonsolvent-induced phase separation method, solidifying in a coagulating bath, rinsing and drying. In the preparation process of the polysulfonate separation membrane, the casting solution, the coagulating bath, the temperature of the environment atmosphere, the environment humidity and the standing time can be accurately controlled to realize a spongy gradient structure of membrane pores. The preparation method of the polysulfonate separation membrane has simple process and can realize industrial scale production.

The invention discloses synthesis of a CeO2-based solid solution nanometer material and an application of the nanometer material to catalytic degradation of dye, belonging to the technical field of nanocrystal preparation. A NaOH solution is used as a precipitator, octahedron CeO2 nanocrystals with different doping proportions are prepared by a high temperature hydrothermal synthesis method, and the octahedron CeO2 nanocrystals are used as catalysts for photo-catalyzing and degrading acid orange 7. The CeO2-based solid solution nanometer material prepared by using the synthesis method disclosed by the invention is an octahedron with uniform feature, the doping elements and doping proportions generate no effect on the feature of a solid solution, and the solid solution is small in crystal particle dimension, adjustable in ingredients, good in dispersibility, stable and uniform in structure, high in single synthesis yield and simple in preparation technique. The CeO2-based solid solution nanometer material is used for photo-catalyzing and degrading dye molecules, and visible light is directly utilized to obtain a high photocatalytic degradation effect, and 60-90 percent of the acid orange 7 can be catalyzed and degraded by the visual light within 2-4 hours. The CeO2-based solid solution nanometer material is a novel photocatalyst composite material with good catalytic performance, good environment-friendliness and low cost.

The invention discloses a lightning arrester zinc oxide varistor and a preparation method thereof. The lightning arrester zinc oxide varistor is prepared by sintering the raw materials of 85-90% of zinc oxide, 0.1-0.5% of calcium oxide, 4-7% of bismuth trioxide, 4-7% of antimony trioxide, 0.1-1% of manganese carbonate and 0.1-1% of aluminum nitrate. According to the lightning arrester zinc oxide varistor, the added calcium oxide can be effectively wrapped outside zinc oxide grains during sintering to inhibit grain growth, reduce the size of the grains and further improve the voltage gradient and the flow capacity of the grains. The lightning arrester zinc oxide varistor is a system prepared from the zinc oxide, the calcium oxide, the bismuth trioxide, the antimony trioxide, the manganese carbonate and the aluminum nitrate, thereby being low in raw material cost; the prepared lightning arrester zinc oxide varistor is uniform and stable in internal structure high in large current impactresistance.

The invention discloses a sun-proof and antibacterial textile fabric which is formed by vertically interweaving warp yarns and weft yarns. The warp yarns are made from, by mass, 42-45 parts of polyester and acrylic composite fiber, 3-7 parts of alpha-methyl styrene, 0.8-1.6 parts of cross-linking agent and 1-3 parts of chitosan. The weft yarns are made from, by mass, 60-70 parts of polylactic acidfiber, 16-18 parts of plant fiber, 2-4.8 parts of titanium dioxide, 1-3 parts of vermiculite power and 10-30 parts of polyvinyl alcohol. The sun-proof and antibacterial textile fabric is prepared through a reasonable formula, crosslink bonding of the raw materials is modified, the effect durability is strong, the made wrap and weft yarns have good antibacterial and anti-ultraviolet properties, the weather resistance is good, the breathability, oxygen permeability and hygroscopicity of the textile fabric are good, biodegradable fiber is adopted and matched with the plant fiber, and the sun-proof and antibacterial textile fabric is green, environmentally friendly, calms the mind, reposes a user and is high in comfort level and especially suitable for wearing when it is burning hot and sunlight is strong in summer.

The invention relates to an amide monolithic column specially-used for enriching glycopeptide based on hydrophilic interaction mechanism and a preparation and an application thereof. The monolithic column is prepared by the steps of that: employing a monomer with an amide functional group and a cross-linking agent; adding a pore forming agent and an initiator with proper ratios; and preparing the monolithic column in a ultraviolet transparent quartz capillary in a manner of rapid photopolymerizaiton. The monolithic column is easy and quick to prepare, stable and uniform in structure, good in hydrophilic performance and has multiple amide functional groups. With the monolithic column, an on-column enrichment operation of glycopeptide based on the hydrophilic interaction mechanism in a microscale biological sample can be achieved. The monolithic column has an excellent practical value and a good application prospect in the preprocessing of glycoprotein of a biological sample and the construction of an on-line analysis platform of glycoprotein.

The invention discloses a formulation of a high-voltage AC zinc oxide resistance chip. The formulation comprises the following additives and a main material ZnO by weight percentage: 4.5 to 5.5 percent of Bi2O3, 5.0 to 6.0 percent of Sb2O3, 0.8 to 1.2 percent of Co2O3, 0.9 to 1.1 percent of MnCO3, 1.0 to 1.5 percent of NiO, 0.02 to 0.04 percent of aluminum nitrate, 0.010 to 0.050 percent of glass dust and 85.0 to 87.5 percent of ZnO. The formulation of the resistance chip has the following characteristics and advantages: 1, the formulation is a new formulation system using the zinc oxide, dibismuth trioxide, diantimony trioxide, nickel protoxide, cobalt sesquioxide and manganous carbide as main compositions, so that the internal structure of the resistance chip is more uniform and stable, and the energy endurance capability is greatly improved; and 2, the nickel protoxide and the glass dust are introduced into the formulation, so that the stability and the aging performance of the resistance chip is more excellent.

The invention discloses a highly-conductive flexible graphene tube and a preparation method thereof. The method comprises the following steps: (1) adjusting an interfiber gap of a high-molecular polymer fiber bundle used as a deposition substrate; (2) electrostatically spraying graphene oxide; (3) soaking a composite material in a GaCl2 solution to enhance the mechanical properties of the fibers;(4) performing chemical pre-reduction on the graphene oxide; and (5) carrying out high-temperature heat treatment: completely reducing the graphene oxide and removing the deposition substrate in the sample to obtain the graphene tube. The graphene tube has a large specific surface area and high conductivity and flexibility, and can maintain stable conductivity after repeated bending. The preparation method for the graphene tube is simple in process and low in cost, and has good application prospects.

The invention discloses an inverted top emission organic electroluminescence device and a preparation method thereof. The inverted top emission organic electroluminescence device comprises a substrate layer, a cathode layer, an organic functional layer and an anode layer which are laminated and combined in turn. The organic functional layer comprises an electron transmission layer and a light-emitting layer which emits light under driving of an external power supply. The electron transmission layer is arranged between the cathode layer and the light-emitting layer in a laminating and combining way. The electron transmission layer has a structure of a doped layer which is formed by multiple doping agent layers and electron transmission matrix material layers in an alternating and laminating way after permeating and doping processing. The preparation method of the inverted top emission organic electroluminescence device comprises steps that: a substrate is acquired, the cathode layer is prepared, the organic functional layer is prepared, the anode layer is prepared, etc. The inverted top emission organic electroluminescence device is high in light emission efficiency, low in starting voltage and long in the service life. The preparation method of the inverted top emission organic electroluminescence device is simple in technology, conditions are easy to control and product qualified rate is high so that production efficiency is effectively enhanced and the inverted top emission organic electroluminescence device is suitable for industrialized production.

The invention discloses a high-performance composite phase-change material, belonging to the technical field of composite materials. The high-performance composite phase-change material comprises liquid alloy with high latent heat of phase change and a modified carbon nanotube sponge skeleton, wherein the modified carbon nanotube sponge skeleton is filled with the liquid alloy with high latent heat of phase change. The high-performance composite phase-change material comprises the liquid alloy with high latent heat of phase change and a melting point adjustable in a range of 20 to 130 DEG C and the modified carbon nanotube sponge skeleton with high thermal conductivity, wherein the liquid alloy uses InSnBi alloy as a substrate and one or more selected from a group consisting of high-enthalpy elements Ga, Cd, Zn and Sb as additives. The high-performance composite phase-change material has high latent heat of volume phase change, high thermal conductivity, low expansion and a melting point adjustable in a range of 20 to 130 DEG C; and the material has excellent and stable thermophysical characteristics and shows good application prospects in fields with high requirements for high-grade heat dissipation, e.g., heat dissipation of high-power lasers, the utilization of industrial waste heat, solar power generation, cooling of fuel cells, photoelectric devices, micro-nano-electronicmechanical systems.

The invention relates to a gridding packaging adhesive film and a preparation method thereof, and belongs to the technical field of photovoltaic cell modules. The gridding packaging adhesive film comprises an adhesive film surface layer which is used for blocking ultraviolet rays and providing an adhesion basis for a reflection grid layer; a reflection grid layer which is of a grid-shaped structure and used for reflecting light, wherein the outline of the reflection grid layer is matched with the gap between the two battery pieces and the gap between the battery pieces and the edge of the assembly; and a transparent adhesive film layer which is used for packaging the photovoltaic backboard or the back photovoltaic tempered glass and is arranged on one side, far away from the adhesive filmsurface layer, of the reflection grid layer. The packaging adhesive film has the advantages that the structure of the reflection grid layer is uniform and stable, and cross-linking deformation along with flowing of the transparent adhesive film layer is avoided, the adhesive film surface layer serving as a forming basis of the reflection grid layer can also block ultraviolet rays, and aging deformation of the reflecting layer, the adhesive film layer and the back plate behind the adhesive film surface layer is prevented.

The invention discloses a high-strength display shell. The high-strength display shell comprises the following raw materials in parts by weight: 18-26 parts of glass fiber, 18-26 parts of carbon fiber, 10-12 parts of aluminum silicate fiber, 40-60 parts of ABS, 14-16 parts of thermoplastic polyurethane, 8-12 parts of silicon dioxide, 8-12 parts of modified wollastonite, 5-7 parts of hexamethylenetetramine, 10-20 parts of polyvinyl chloride micropowder, 2-6 parts of tributyl citrate, 2-6 parts of acid salt, 18-26 parts of polypropylene, 15-20 parts of polypropylene, 15-25 parts of polystyrene,14-26 parts of active calcium, 16-18 parts of lithopone, 12-15 parts of carbon black, 15-20 parts of high-elasticity rubber and the like. Through mixing of the glass fiber, the carbon fiber and the aluminum silicate fiber, a fiber material with high strength, strong toughness and good mechanical vibration resistance is obtained, and the fiber material is matched with the other components to prepare the display case with high strength, strong toughness and good mechanical vibration resistance, so that the current market demand is met.

The invention relates to a carbon nanotube composite material, in particular to a ZnAl, namely layered double hydroxides / carbon nanotube composite material ZnAl-LDHs / CNTs with [Zn<2+>1-xAl<3+>x(OH)2](CO3<2->)x / 2.nH2O / CNTs as a structural general formula. In the composite material, the layered double hydroxides are sheet shaped and evenly distributed on the surface of a carbon nanotube, and the grain size of the layered double hydroxides is between 10 and 40nm. The composite material is a good photocatalyst and can be used for photocatalytic degradation of dye molecules; and the catalytic efficiency for the photocatalytic degradation of methyl orange can reach between 60 and 90 percent.

The invention discloses a three-dimensional reduced graphene oxide aerogel material and a preparation method thereof. The aerogel material is composed of graphene oxide and reduced graphene oxide, andis black and fluffy sponge-shaped overall. The three-dimensional reduced graphene oxide aerogel generates a large number of micron-sized pores in the forming process of the three-dimensional structure. After the aerogel material provided by the invention is mixed evenly with the paraffin, under the circumstance that the dosage of the aerogel material accounts for 10% of the total mass and the matching thickness is 2.5mm, in a frequency range of 2-18GHz, the reflection loss can reach -8.2dB. At the same time, in the preparation process of the three-dimensional reduced graphene oxide aerogel, ZnO and other metal nanoparticles can be carried in the pores inside the porous reduced graphene oxide, thus realizing compounding and regulation of the electromagnetic properties of the prepared material.

The invention provides an antibacterial nano after-finish agent for knitted fabrics and a preparation method thereof. In terms of mass percentage, the antibacterial nano after-finish agent for knittedfabrics includes the following components of nano-scale antibacterial coating agent 4.5% to 7.5%, titanium dioxide hydrosol 7% to 12%, metal-loaded composite mineral powders 2% to 4. 5%, coupling agent 1% to 4%, and curing agent 1% to 4%, and the balance is water. The antibacterial nano after-finish agent for knitted fabrics has reasonable raw material selection, uses the titanium dioxide hydrosol as the jointing basis, and uses the nano-scale antibacterial coating agent and metal-loaded composite mineral powders as effective antibacterial ingredients; therefore, the overall antibacterial effect is good, the structure is uniform and stable, the film formation is good, the adhesion to the knitted fabric fiber is strong, the chemical crosslinking effect is good, and the reagent fastness issignificantly improved; and meanwhile, the antibacterial nano after-finish agent for knitted fabrics has excellent ultraviolet resistance, good sun protection effect, and fragrant and refreshing effect, and the fabric protection period is prolonged significantly.

The invention relates to a composite type high-temperature proton exchange membrane (PEM) based on hydrophilic sulfonated aryl ether type polybenzimidazole (PBI) and sulfonated polysilsesquioxane anda preparation method of the composite type high-temperature proton exchange membrane, and belongs to the technical field of fuel cells. The preparation method comprises the following steps: first, dissolving a sulfonated polybenzimidazole polymer in an organic solution, then sufficiently mixing with an additive solution, casting an obtained mixed solution into a membrane, then soaking the membranein phosphoric acid, taking out the soaked membrane, and drying to obtain the exchange membrane. The presence of a sulfonic acid group in the sulfonated polybenzimidazole polymer greatly enhances thehydrophilicity, and the problem of precipitation at the presence of water during the addition of a 3-(trihydroxysilyl)-1-propanesulfonic acid additive aqueous solution is solved. Further, a sulfonatedpolysilsesquioxane skeleton with a cage structure is formed in the film, and the skeleton has hydrophobicity and has the sulfonic acid group, so that the overall hydrophilic and acidophilic properties are enhanced. After sulfonated polysilsesquioxane is introduced into the composite membrane, the swelling ratio of the proton exchange membrane can also be reduced to a certain extent and the mechanical properties of the proton exchange membrane are enhanced.

The invention provides a waterproof reinforcing agent, waterproof foamed concrete and a roof waterproof system. The roof waterproof system comprises a roof structural layer and a waterproof foamed concrete layer arranged on the roof structural layer; and the waterproof foamed concrete layer is formed by the waterproof foamed concrete. Compared with the prior art, the waterproof reinforcing agent is adopted to modify foamed concrete to ensure that the structure of the waterproof foamed concrete is more uniform and stable to form a round and closed disconnected pore structure, the pore diameter is relatively small, hydrophobicity is generated, a relatively high waterproof effect is achieved, and the waterproof foamed concrete also has a relatively good heat insulation effect, so that the roof waterproof system not only has a relatively good waterproof effect but also has a relatively good heat insulation effect; moreover, the waterproof system provided by the invention has an integrated structure, is simple and convenient to construct, is relatively low in cost, is convenient to maintain, is lightweight, and is good in structural stability and long in service life.

The invention relates to a preparation method of a nano ZnO / graphene composite material. The preparation method includes following steps: (1) mixing a nano zinc oxide water solution with a chemically-reduced graphene oxide solution uniformly to prepare a mixture solution, wherein the mass ratio of nano zinc oxide to chemically-reduced graphene oxide is 1-100:1; (2) performing an ultrasound reaction to the mixture solution in an ultrasound instrument to obtain a reaction product; and (3) separating and washing the reaction product to obtain the nano ZnO / graphene composite material. The nano ZnO / graphene composite material is uniform in structure, is excellent in ultraviolet absorption performance, is simple in preparation method and device and is easy to achieve large-scale production.

The invention relates to selenium / silica / gold nano composite particles as well as a preparation method and application thereof. The preparation method comprises the following steps: synthesizing selenium / silica nano-spheres, which are mainly formed by silica spheres and Se quantum dots dispersed in the silica spheres, through an inverse micro emulsion method, and coating the surfaces of the selenium / silica nano-spheres with mesoporous gold shells through a gold seed growth method to prepare the selenium / silica / gold nano composite particles. The selenium / silica / gold nano composite particles prepared with the method are mainly formed by the selenium / porous silica nano-spheres and the mesoporous gold shells coating the surfaces of the selenium / porous silica nano-spheres, the selenium / porous silica nano-spheres are mainly formed by porous silica spheres and Se quantum dots dispersed in the porous silica spheres, and the average particle size of the selenium / silica / gold nano composite particles is 90-100nm; and finally the prepared selenium / silica / gold nano composite particles are used for photothermal therapy, drug sustained release and CT imaging. The method is mild in reaction condition, the photothermal conversion efficiency of the prepared nano composite particles is high, and the application prospect is wide.

A bamboo laminated lumber is provided having structural characteristics meeting or exceeding dimensionally equivalent wood based components. The bamboo laminated lumber is formed from bamboo laminated elements laminated and joined together to form dimensional lumber and engineered lumber components. The bamboo laminated lumber element comprises a combination of linear bamboo starter boards being halves of timber bamboo canes pressed flat with the inner pith surfaces laminated together with the grain aligned and skewed bamboo starter boards being halves of timber bamboo canes pressed flat with the inner pith surfaces laminated together with the grain offset from centerline at a specified angle. Top and bottom linear bamboo starter boards are laminated to a central skewed bamboo starter board yielding a bamboo laminated lumber element.

The invention relates to a preparation method of a high-density silicon carbide composite and belongs to the technical field of composite processing. The method comprises steps as follows: main materials become a slurry finished product after being treated, the main materials comprise SiC granules and B4C granules, and the B4C granules are taken as a sintering aid; auxiliary materials are added to the slurry finished product, pre-casting slurry is prepared, and the auxiliary materials comprise acrylamide, methylene bisacrylamide and ammonium polyacrylate; ammonium persulfate is added to the pre-casting slurry, the mixture is stirred uniformly and subjected to forming, and a blank body is obtained; the blank body is firstly subjected to solvent degreasing and then subjected to thermal degreasing; the degreased blank body is sintered under the vibration pressure at the temperature of 2,000-2,100 DEG C, and the high-density silicon carbide composite is obtained finally. The prepared silicon carbide composite is uniform and stable in structure and quality, high in density and high in controllability and also has better toughness and strength.