98results about How to "Strong absorption properties" patented technology

An assembled type movable blast wall is formed by a plurality of blast wall units in an assembled mode. Each blast wall unit comprises a base, front pull rods, rear compression bars, a supporting frame, energy absorption layers and connecting bolts. Each supporting frame is fixed on the upper surface of the corresponding base, and one or more energy absorption layers are arranged inside each supporting frame in a filling mode. The energy absorption layers are formed by a plurality of prefabricated bodies which are made of EPS flow state concrete in an arrayed mode. A plurality of slide-resistant piles are distributed on the lower surface of each base. When multiple energy absorption layers are arranged, a middle layer is arranged between every two adjacent energy absorption layers. The assembled type movable blast wall can be deformed easily when undergoing impulse loads of the outside, the deformation is large, however, the flow stress level is quite low, in the compression deformation process, a large amount of power is consumed, the power is converted into energy dissipated in all sorts of modes like deformation, collapsing, fracturing and cell wall friction of holes in the structure, and thus the outside impact energy can be effectively absorbed. The assembled type movable blast wall further has the advantages of being rapid in assembling, low in cost and strong in stability.

The invention relates to a coating composite material, in particular to a coating composite material with high heat insulation and high peeling strength taking polyvinyl chloride and polyester fiber base cloth as main base materials and a preparation method of the material, and belongs to the technical field of new materials. The composite material comprises a polyester fiber fabric base materiallayer, wherein a coating surface layer and a back layer are respectively arranged on both sides of the base material layer; the back layer comprises a flame-retardant PVC primer layer and a flame-retardant PVC heat insulation layer from inside to outside; and the coating surface layer comprises a flame-retardant PVC primer layer, a flame-retardant PVC heat insulation layer, a PVC high reflection layer and an infrared reflection heat insulation transparent layer from inside to outside, and is prepared by adopting a specific preparation method. The coating composite material has good heat insulation, high peeling strength and wicking resistance characteristics, and has excellent flame resistance, weather resistance and ultraviolet resistance.

The present invention relates to a laser internal engraving device. The laser internal engraving device comprises a worktable used for bearing processing-waiting objects; a laser generator used for producing a laser beam with a prescheduled wavelength; a laser beam converging mechanism used for converging the laser beams to the subsurface of the processing-waiting object to form a laser converging point which is capable of destroying the innate features of the processing-waiting object; a transmission mechanism used for transmitting the laser converging point according to the processing-waiting object, and the working wavelength of the laser beam is in the ultraviolet range. With the structure, man-made crystal, and the relatively strong absorption of the glass to the ultraviolet wave band, the volume of the burst point produced in the object is smaller; the generated pattern is more delicate and vivid.

The present invention relates to gold@zinc oxide core-shell heterogeneous nanoparticles having strong sunlight absorption property, and a preparation method thereof, wherein the core of the nanoparticle is octahedral gold nanoparticles, the shell layer component is polycrystalline zinc oxide nanoparticles, and the structure parameters of the scale, the zinc oxide shell layer thickness, the gold core size and the like can be effectively regulated respectively within 30-160 nm, 10-30 nm and 50-200 nm. The preparation steps comprise: sequentially adding a proper amount of deionized water, sodium borohydride, zinc nitrate and a sodium hydroxide aqueous solution to a pre-prepared octahedral gold nanoparticle colloid solution, carrying out a reaction for 5-100 min at a temperature of 0-100 DEG C, and centrifugating at a rotation speed of 3000-14500 rotation/min to obtain the gold@zinc oxide nanoparticles. According to the present invention, the gold@zinc oxide nanoparticles have important application valus in the fields of photocatalysis, pollutant degradation, environmental governance, and the like.

Inorganic crystals having one or more species of dopant ions which are photo-reactive are used as visible and or infrared light optical limiters to protect against laser radiation exposure while permitting passage of the visible and or infrared light spectrum at least until exposed to high energy laser radiation. The dopant ions are selected from ions of transition metals. The exposure of these ions within the transparent crystalline matrix either photo-ionize or are elevated to an excited state and thereby absorb or otherwise attenuate the passage of the laser beam radiation sufficiently to protect human eyes or photo-sensitive equipment. The crystals may be fabricated into such items as lenses for use in eyeglasses or on shields of flight helmets to protect the eyes of aircraft pilots.

The invention provides a grapheme-ferroferric oxide composite material for absorbing high-frequency electromagnetic waves and a preparation method thereof. The preparation method comprises the following steps of: adding 0.08-0.12 gram of grapheme into 280-320 milliliters of water, adding 0.05-0.15 gram of Fe (NO3)3.9H2O into the solution for stirring, centrifugally separating, washing the precipitate with ethanol and distilled water for certain times, and drying in the vacuum environment; and heating to 350 DEG C in the argon atmosphere, and annealing for 2 hours to obtain grapheme-ferroferric oxide composite material for absorbing high-frequency electromagnetic waves. In a film prepared with the method, the absorbing strength is below -20 dB when the thickness of the film is 3-6 millimeters. The preparation method provided by the invention is easy to operate, is suitable for industrial production, and can be used for preparing the grapheme-ferroferric oxide composite material with high absorption characteristic on high-frequency electromagnetic waves.

The invention relates to a composite membrane, in particular to a gold nanorod-graphene composite membrane and a preparation method thereof. The composite membrane comprises graphene oxide, oleyl amine modified graphene and gold nanorods, wherein the graphene oxide and the oleyl amine modified graphene are mixed with each other and stacked to form a graphene membrane; the gold nanorods are doped on the surface and among the layers of the graphene membrane; and an absorption peak appears within 500-1000nm in a visible light-near infrared region. The method comprises the following steps: firstly preparing the oleyl amine modified graphene; then preparing graphene oxide aqueous solution; preparing oleyl amine modified graphene toluene solution; and finally taking and adding gold nanorod aqueous solution to the graphene oxide aqueous solution, adding the oleyl amine modified graphene toluene solution, sealing the obtained two phases of mixed solution and standing, thus the graphene oxide, the gold nanorods and the oleyl amine modified graphene can self assemble the composite membrane on the water-toluene interface, and volatilizing the toluene to completely remove the toluene, thus obtaining the unbraced gold nanorod-graphene composite membrane on the water-air interface.

The embodiment of the invention provides a perovskite phototransistor and a fabrication method thereof, and belongs to the field of optical detection. The phototransistor device comprises a basic substrate, a drain-source metal electrode and a metal oxide semiconductor thin film, wherein the drain-source metal electrode is arranged on the basic substrate, a charge transmission interface layer covers the metal oxide semiconductor thin film, a patterned organic-inorganic hybrid perovskite material layer is arranged above the charge transmission interface layer, the patterned organic-inorganic hybrid perovskite material layer is at least separated from the source-drain metal electrode and the metal oxide thin film by the charge transmission interface layer, and a passivation layer is arrangedabove the basic substrate and completely covers the device. The perovskite phototransistor is of a bottom-grid bottom-contact structure and has the characteristics of low dark current, fast responsespeed and wide spectrum response; and compared with a silicon-based photoelectric detector, the perovskite phototransistor has the characteristics of low cost and low preparation energy consumption, and the device fabrication process is favorably compatible with a current silicon-based process platform.

The invention relates to a preparing method for thorniness gold nanoparticles. The preparing method includes the following steps that firstly, a soluble silver source, a soluble gold source and a weak reducing agent are sequentially added into a nonionic surface active agent solution, oscillating and standing are conducted, and thorniness gold nanoparticle dispersion liquid is obtained; and secondly, the dispersion liquid and a hexadecyl trimethyl ammonium bromide solution are mixed with the equivalent volume, the mixture is stirred for 1.5 h to 2.5 h and then is subjected to centrifugal separation and dispersed in deionized water again, and a thorniness gold nanoparticle solution is obtained. Compared with the prior art, a nonionic surface active agent triton X-100 is used for controlling growing and forming, and the thorniness gold nanoparticles are grown through a one-step method without seeds, the yield approaches 100%, and synthesis conditions are simple. Particle size distribution of manufactured thorniness gold nanoparticle pieces is narrow, obvious absorption characteristics can be shown in a near-infrared light visible region, and the preparing method can be applied to the biomedicine forefront fields such as preparing of photo-thermal therapy medicines, optical biological markers and sensors and the like.

It is an object of the present invention to provide a crash reinforcing member for a vehicle capable of preventing reduction in flexural rigidity as much as possible even if deformation progresses when a load at the time of crash of the vehicle is input. [Solution] A crash reinforcing member for a vehicle (e.g., door impact beam) includes a long body 10. The body 10 has a hat-shaped opened cross-sectional shape by connecting, with one another, a pair of walls 11, a pair of curved corners 12, a center flange 13, and a pair of outer flanges 14. The body 10 is divided into three sections P1, P2 and P3. A width (C1) of the center flange in the section P1 is wider than a width (C2) of the center flange in the section P2. A cross-sectional area of the curved corner 12 in the section P1 is narrower than a cross-sectional area of the curved corner in the section P2. A cross-sectional height (H1) of the section P1 is higher than a cross-sectional height (H2) of the section P2. The section P3 is provided as a gradually changing portion which smoothly connects the section P1 and the section P2 with each other.

The invention relates to a preparation method for single-layer molybdenum disulfide nanosheets. The method comprises the following steps: (1) 200-250mg of molybdenum disulfide powder with a particle size less than 2 micrometers, 90-110mg of chitosan powder, 1-1.2g of an ionic liquid and 10-15mL of an organic solvent are uniformly mixed and transferred to a sealed glass container, so a first dispersion solution is obtained; (2) the first dispersion solution is subjected to ultrasonic treatment, after the ultrasonic treatment is finished, high-speed centrifugation separation is performed, and a precipitate is collected; (3) the precipitate obtained in the step (2) is dispersed in an acetic acid solution with a concentration of 0.5%, centrifugation separation is performed, a precipitate is collected, and the above process is repeated for two times; and (4) the precipitate obtained in the step (3) is dispersed in deionized water, low-speed centrifugation separation is performed, and a supernatant is collected, so a single-layer molybdenum disulfide nanosheet solution is obtained. According to the invention, the process is simple, costs are low, the yield is higher than 25%, repeatability is good, and defects of large size, a low single-layer yield, nonuniform particle size and the like of molybdenum disulfide nanosheets obtained in the prior art can be overcome.

The invention relates to a preparation method and device of trimethyl borate-10. The preparation method comprises the steps of adding reactants into a reaction kettle, taking methanol as a solvent, and stirring for reacting for 30-45h; setting the reaction temperature to be 50-70 DEG C, and performing esterification reaction to generate trimethyl borate-10; performing azeotropic distillation on an esterification reaction product, and setting the temperature to be 70-90 DEG C; collecting a fraction at the temperature of 50-60 DEG C, then continuously heating, and recovering methanol; adding the fraction collected in azeotropic distillation into an extraction and distillation tower kettle; heating the tower kettle, controlling the heating voltage to be 120-150V and controlling the total reflux time to be 20-30min according to the total reflux speed to meet a heat load of a system, adding an extraction agent N, N-dimethylformamide or dimethyl sulfoxide or a mixed extraction agent into a high-level tank at the tower top of a distillation tower, and collecting trimethyl borate at the temperature of 67-68.5 DEG C at the tower top. The operation of the method is stable, and the purity of trimethyl borate-10 obtained by the method can be above 99%.

The invention discloses a dry and wet garbage classification method. The method comprises the steps: obtaining a gray-scale image of a garbage package, and the gray-scale image is a short-wave infrared gray-scale image or a terahertz gray-scale image; determining a first number of pixel points of which the pixel values are smaller than a dry and wet garbage pixel segmentation threshold in the grayscale image, and determining a target proportion of the first number to the number of all the pixel points; and determining the proportion range of the target proportion, and determining the categoryof the garbage package according to the proportion range. Therefore, the classification method provided by the invention can automatically realize dry and wet garbage classification of the garbage packages, and is very simple and convenient. In addition, the invention further provides a dry and wet garbage classification box and a dry and wet garbage sorting system which have the advantages.

A low temperature solar energy selective absorption coating includes preparing Al or Cu of 0.02-0.06*10<-6>m thick on a glass surface as a substrate, depositing Ge-C of 0.03*10<-6>m-0.15*10<-6>m thick on the substrate as an infrared antireflection layer and preparing an Al-N composite absorbing material layer on the infrared antireflection layer. The invention adds the infrared antireflection layer through the novel solar energy adsorption coating, which is prepared through a multi-target magnetron sputtering technology. The coating is provided with a perfect property of absorbing solar long spectrums within the wavelength range of 0.3-2.5 Mu m. What is more important in that the substrate of the absorption coating is provided with high adsorption rate, good reflection effect on infrared rays which are longer than 8 Mu m and high permeability on infrared rays which are shorter than 8 Mu m. And when the temperature in a vacuum tube rises to 90-100 degree Celsius, the emission rate of the membrane layer can rapidly ascend to increase the heat losses of a heat collector and avoid a system to be overheated.

The invention belongs to the field of semiconductor materials, and relates to a method for preparing a microcrystalline silicon thin film. Specifically, it is a method of preparing a thin layer of microcrystalline silicon layer on the surface of an amorphous silicon film deposited on a glass substrate by laser surface crystallization. The amorphous silicon film deposited directly on the glass plate is partially transformed into microcrystalline silicon by laser heating and crystallization; the laser heating crystallization method is to place the sample of the amorphous silicon film on a laser On the sample stage, the laser beam is irradiated, the amorphous silicon film absorbs the energy of the laser and converts it into its own energy, local melting and recrystallization occur, and the surface crystallization process makes the amorphous silicon transform into microcrystalline silicon. The invention can solve the problems of low growth rate, low crystallinity, low mobility and low photoelectric conversion efficiency in the prior art, and the microcrystalline silicon film crystallized by excimer laser has high crystallinity, uniform crystal grains, and Realize the advantages of large-area low-temperature preparation and short process cycle.

To provide a dye which has a good hue, which can form an image showing a high fastness under various using conditions and environmental conditions, and which is particularly suited for an ink, the dye is represents by formula (1): wherein R1 and R2 each independently represents a monovalent group, Z represents a nitrogen atom or a carbon atom to which a hydrogen atom or a monovalent group is bonded, and M represents a hydrogen atom or a cation, provided that the dye has two azo groups.

The invention relates to a poly R-indole blue light absorbent and a preparation method and application thereof. The poly-R-indole blue light absorber is a mixture of a series of oligomers obtained from R-indole through a free radical oxidation method. The poly (R-indole) blue light absorbent has relatively strong absorption capability on ultraviolet light and short-wave blue light wave bands of 400-480nm, and has extremely high transmission capability on visible light of 500nm or above. In addition, the absorbent has good solubility in a non-polar solvent and a resin monomer, and is suitable for being applied to resin spectacle lenses, polymer material films and coatings.