63results about How to "Strong absorption" patented technology

The invention relates to the field of biomedicine, particularly to a polyethylene glycol modified Bi nano photothermal conversion material as well as a preparation method and an application thereof, and aims to solve problems that photothermal conversion performance, photothermal stability and biosecurity of existing developed inorganic photothermal conversion materials (such as gold nano-rods, gold nano-shells, carbon nano-tubes, Cu9S5 nanocrystals and the like) need to be improved and synthetic processes are relatively complex. The particle size of the polyethylene glycol modified Bi nano photothermal conversion material is 20-200 nm, and the photothermal conversion efficiency of the polyethylene glycol modified Bi nano photothermal conversion material is 25%-35%. The method comprises steps as follows: I, a Bi nanoparticle material is prepared; II, the Bi nanoparticle material is coated. The polyethylene glycol modified Bi nano photothermal conversion material as a photothermal conversion nanomaterial is used for photothermal therapy of malignant tumors.

The invention discloses a houghite photocatalyst based on visible light response and a preparation method thereof, belonging to the technical field of preparation of photocatalysts. A series of houghite photocatalysts with response under visible light are synthesized by adopting a nucleation/crystallization separation method. By adjusting and controlling the composition of metal and interlaminar guest ions, a series of photocatalysts with excellent performance and full spectrum absorption under visible light can be obtained. The series of catalysts have very high absorption, can make full use of visible light part of sunlight, have high dye photocatalysis performance, can be applied to photocatalytic degradation of environmental pollutants, and have photocatalytic performance greatly superior to that of the conventional P25TiO2 photocatalyst. The photocatalyst produced by adopting the preparation method has low cost and simple process, is easy and convenient to operate, and is easy for mass production.

The invention provides a gray solar reflective cooling coating and a preparation method of the gray solar reflective cooling coating. The coating adopts a water-based acrylic emulsion as film-forming base stock, so that the coating is good in ageing resistance, long in outside service life, nontoxic and environmentally-friendly, and has good stain resistance, alkali resistance and water resistance, and good adhesive force to base materials such as concrete, metal, wood and glass. The gray solar reflective cooling coating is prepared from complementary color pigment pairs with a strong near infrared reflection or transmission function, such as black and white, blue and orange, purple and yellow, red and blue and the like, and titanium dioxide as functional pigments, assisted by a plurality of body pigments and assistants; therefore, the gray solar reflective cooling coating is simple to prepare, low in cost and friendly to the environment. The gray solar reflective cooling coating has excellent near infrared reflection and heat insulation performances, has good cooling performance, and can be widely applied to decoration and energy conservation of roofs and outer walls of buildings, and the optical performance meets the latest national standard requirements.

The invention belongs to the technical field of fertilizers and provides a topdressing fertilizer for a walnut garden in autumn and a preparation method thereof so as to strengthen walnut trees and increase all the nutrients essential for growth and development of soil and the trees in a relaxation period of the walnut trees in autumn. Effective components of the fertilizer comprise, by weight, 10 to 15% of nitrogen, 4 to 6% of phosphorus, 10 to 15% of potassium, 0 to 3 % of calcium, 0 to 3% of magnesium, 0 to 3% of sulfur, 0 to 0.3% of iron, 0 to 0.4% of zinc, 0.4% of copper, 0 to 0.2% of boron, 0 to 0.3% of manganese, 0 to 0.2% of molybdenum, 0 to 0.2% of chlorine and 8 to 10% of humic acid. The topdressing fertilizer provided in the invention substantially meets demands of the walnut trees for all the nutrients needed in annual growth. The fertilizer is especially applied after harvesting of the walnut trees, can further improve photosynthesis of leaves, promotes root growth, strengthens the walnut trees and increases later-stage accumulation of nutrients in the trees and soil. The absorptivity of the fertilizer is high and free of waste, and fertilizer efficiency rapidly takes effect and is powerful; the preparation method has the advantages of a simple process, low cost and suitability for industrial production.

This invention relates to an AlGaN base resonance enhanced monocolor ultraviolet detector structure including: setting low and high temperature GaN materials with the thickness of 50-2000nm on a sapphire substrate, setting AlN/AlGaN multilayer structured distributed Bragg reflectors of 15-80nm and 15-100nm of 5-50 periods on the GaN material as the base lenses, setting a resonance cavity of n-AlxGal-xN/i-GaN/p-AlxGl-xN structure on the lenses, namely, setting high temperature absorption layers of n-AlzGal-xN and i-GaN of 20-80nm and 5-30nm thick and a resonator of 20-80nm thick and high temperature p-AlxGal-xN, Al composition and x is greater than or equal to 0.3, finally finishing RCE ultraviolet detector structure by a reflector, a top lens of AlN/AlGaN multi-layer structure distributed Bragg structure reflectors in the thickness of 15-89nm and 15-100nm from 0-30 periods.

The invention discloses an acyl phosphine photoinitiator shown as a specification and a preparation method thereof. The bifunctional acyl phosphine photoinitiator has a macro-molecule structure, eliminates migratory aptitude of the photoinitiator during a usage process, improves yellowing phenomenon, and couples a tertiary amine structure on an aromatic ring compound, the UV absorption wavelength shows bathochromic shift to 380-395 nm, polymerization of a unsaturated monomer is effectively initiated under radiation of a UV-LED lamp; in addition, the compound has good dissolvability in various resins and an oligomer, and is the novel macro-molecule acyl phosphine photoinitiator.

The invention discloses a visible light broadband perfect absorber based on a semiconductor metasurface. The absorber is an optical metasurface structure and comprises a metal reflecting layer and a dielectric layer arranged on the reflecting layer; the dielectric layer is composed of periodic structure units and is a square; each structure unit is composed of four rhombus dielectric block resonators which are arranged in a crisscross shape; two adjacent structure units share on rhombus resonators. Compared with the existing absorber, the absorber has strong absorption effect on the incident light by utilizing the strong electromagnetic resonance mode of the dielectric resonators and a coupling resonance mode between the adjacent resonators, thereby realizing the broadband perfect absorption of the ultraviolet-visible-near infrared waveband.

The invention provides novel anti-ultraviolet baby fabric applicable to ordinary days and a preparation method thereof. The preparation method comprises the following specific steps: 1, mincing and adding buckwheat, red dates and eggplants to a hydrochloric acid anhydrous ethanol solution, conducting ultrasonic treatment for 20-30 minutes at the power of 200 W, conducting reflux extraction for 50-60 minutes at the temperature of 60-70 DEG C, and obtaining rutin extract; 2, nanometer attapulgite and citric acid to the rutin extract, stirring the mixture uniformly, conducting filtration for removing impurities, then adding honey and deionized water, conducting homogeneous stirring and defoaming, and obtaining an anti-ultraviolet treatment agent; 3, adopting exterior and interior knotting double layer weave as a fabric weave structure, treating spandex elastic covering yarn fibers and superfine polyester fibers as exterior warp and exterior weft respectively, treating cotton fibers and silk fibers as interior warp and interior weft respectively, and forming double layer fabric through weaving; 4, conducting plasma treatment on the double layer fabric, spraying the anti-ultraviolet treatment agent, conducting drying, repeating spraying and drying, conducting washing and drying, and finally obtaining the anti-ultraviolet baby fabric applicable to ordinary days.

The invention discloses an aristate spherical metallic nickel/graphene composite wave-absorbing material and a preparation method thereof. The composite wave-absorbing material of graphene-loaded metallic nickel nanoparticles is prepared in one step through a hydrothermal reaction by adopting nickel chloride and graphite oxide as precursors and hydrazine hydrate as a reductant. The metallic nickel nanoparticles loaded on metallic nickel/graphene wave-absorbing material obtained by the preparation method are aristate spherical and are directly loaded on graphene, and are stable in structure and good in dispersibility; in addition, the preparation method is high in efficiency, low in cost, short in time consumption just needing 0.5-1.5 hours and simple in process. The prepared aristate spherical metal nickel/graphene wave-absorbing material has excellent wave-absorbing performance on 2-18GHz frequency bands.

The invention relates to a conjugated small molecule based on nona fused heterocycle, a preparation method and applications thereof. According to the preparation method, 2,5-dibromoterephthalic acid diethyl ester is used as a raw material, and a series of coupling, ring forming, condensation and other reaction steps are performed to synthesize a small molecule having a large planar structure. According to the present invention, the A-D-A conjugated small molecule based on the nona fused heterocycle unit of pyrrolodithiophene has characteristics of good thermal stability, good solubility and good film forming property; the results of ultraviolet-visible light absorption spectrum and electrochemical tests show that the compound has moderate optical band gap, and has good absorption in visible and near-infrared regions; and the obtained product has low HOMO level and low LUMO level, and is the potential organic solar cell receptor material or perovskite battery electron transport layer material.

The invention belongs to the technical field of nanometer optical fiber band-pass filters, and particularly relates to a tunable broadband nanometer optical fiber band-pass filter. The filter aims atsolving the problems that operating of a band-pass filter of an existing optical fiber system is mainly based on technical means of interference, an optical grating, coupling and the like, so that thebandwidth is narrow, the application wave band is fixed and cannot be tuned, and most existing optical fiber band-pass filters cannot achieve the band-pass filtering effect within a hundred-nanometerrange. The tunable broadband nanometer optical fiber band-pass filter comprises a broadband optical source, nanometer optical fiber, a spectrograph and an optical fiber needle. The nanometer opticalfiber and the optical fiber needle are made from ordinary optical fiber, the cost is low, and the processing difficulty is low; by moving the optical fiber needle, the position, in contact with the nanometer optical fiber, of the optical fiber needle is changed, therefore a transmitted spectrum of the nanometer optical fiber can be adjusted, and spectrum adjustment only needs changes of relative positions of the optical fiber needle and the nanometer optical fiber, and spectrum adjustment cannot be influenced by environment conditions such as parameters of temperature, humidity and the like.

The invention discloses a boron-doped mesoporous flower-like ferroferric oxide/carbon composite wave-absorbing material and a preparation method thereof, and belongs to the technical field of electromagnetic wave absorbing materials. The preparation method comprises the following steps: taking ferric chloride, urea, hexadecyl trimethyl ammonium bromide and boric acid as reaction raw materials andethylene glycol as a solvent, preparing an iron alkoxide precursor by adopting a solvothermal method, and then calcining the iron alkoxide precursor in inert gas to obtain the boron-doped mesoporous flower-like ferroferric oxide/carbon composite wave-absorbing material. The wave-absorbing material and paraffin are compounded for a wave-absorbing performance test, the result of the test shows thata sample has a very strong absorbing performance on electromagnetic waves, and the maximal reflection loss value reaches -51dB; by adjusting the thickness, the effective absorption band can reach 14.2GHz, including the whole C wave band, X wave band and Ku wave band. The wave-absorbing material has an excellent wave-absorbing performance, a wide wave-absorbing frequency band and high absorbing strength, and has a great application potential in the field of wave absorption.

The invention discloses an aluminum profile machining device. The aluminum profile machining device is characterized in that an arc-shaped conveying table is welded to the top end of a fixed supporting frame, roller mounting grooves are formed in the top end of the arc-shaped conveying table, moving rollers are installed on the inner side of the roller mounting grooves, and the moving rollers are connected to transmission gears through rolling rods; an aluminum ingot cutting knife set is fixedly installed at the bottom end of a lifting hydraulic cylinder, a heating box is embedded into the top end of a fixed supporting plate, a two-way lead screw penetrates through one end of the heating box, a rotating groove is formed in the inner side of the heating box, and rotating wheels are installed on the inner side of the rotating groove; an aluminum ingot is driven to move into the heating box through the moving rollers, an external mechanical arm is not needed, and the aluminum ingot can be directly conveyed to move, so that the cut aluminum ingots are conveniently and rapidly conveyed into the heating box; and the situation that thermal stress cracks occur to the aluminum ingots due to the fact that part of the aluminum ingots are heated unevenly when the aluminum ingots are heated is avoided through circulating heat supply, and the situation that the aluminum ingots influence follow-up manufacturing is avoided.

The invention discloses a material capable of emitting near-infrared light by virtue of conversion of ultraviolet light as well as a preparation method and application thereof. The chemical formula of the material is La<7-7x>Yb7Mo7O30, wherein x is a doping mole percentage of Yb<3+>, x is more than or equal to 0.0001 and less than or equal to 0.4, and under the active excitation of ultraviolet light of 250nm to 400nm, the material can emit the near-infrared light of 900nm to 1100nm; the material can be prepared in a high-temperature solid-phase method, a sol-gel method and a co-precipitation method and has the advantages of broad excitation from ultraviolet to visible light, strong near-infrared light emitting and the like, and the spectrum mismatching problem between sunlight and a solar battery can be effectively solved, so that the photoelectric conversion efficiency and performance stability of the battery can be improved, and the material not only can be used as an optical conversion material for a silicon-base solar battery, but also can be applied to the analysis and determination fields of products in various industries such as food, medicine and petrochemical engineering.

The invention discloses a production process for producing germ nutrition powder by virtue of enzymolysis, and belongs to the technical field of food processing. The production process comprises the following steps: mixing and micro-grinding wheat germs, peanut germs and soybean germs, adding water and homogenizing by homogenizers; carrying out an enzymolysis treatment for five times, carrying out the fourth times of enzymolysis with an animal bone mixture, and sequentially homogenizing by five homogenizers. Due to the earlier homogenization of the soybean germs and the wheat germs, the soybean germs and the wheat germs are adequately enzymolysed; small peptides, polypeptides and large peptides generated by enzymolysis, 5% maltodextrin, starch, oligosaccharide and polysaccharide fine celluloses generated by enzymolysing celluloses are adequately emulsified, and coat the animal bone micro-powder grains with diameters of less than 15 microns; a microencapsulation effect is good, absorption is facilitated, in particular, the absorption rate of calcium is also greatly increased, immunity and bone mineral density can be improved, and bone losses can be reduced; moreover, germ oil and VE are basically isolated from oxygen, deterioration and peculiar smell generation are not liable to occur, and an expiration date is long.

The invention relates to a high-efficiency absorption hemostatic dressing and a preparation method thereof, and belongs to the technical field of medical consumables. The high-efficiency absorption hemostatic dressing of the invention includes a hemostatic layer, an absorption core layer, an antibacterial layer, a waterproof layer and a bottom layer in order. Preparation raw materials of the absorption core layer include fluff pulp and super absorbent resin. The absorption core layer of the invention adopts an absorption structure composed of the super absorbent resin and the fluff pulp, and so a large amount of blood can be quickly and fully absorbed and effectively coagulated without leaking back, thereby ensuring anti-seepage and anti-leakage. Meanwhile, the high-efficiency absorption hemostatic dressing has waterproof, breathable, antibacterial and hemostatic effects, promotes rapid healing of wounds, and is widely used in patients with moderate and severe bleeding.

The invention discloses a preparation method of an MXene-CNT/carbon aerogel composite material, which specifically comprises the following steps: firstly, etching an MAX phase precursor through LiF-HCl to prepare a few-layer MXene powder; preparing MXene-CNT/cellulose aerogel by using few layers of MXene powder and CNT powder; and finally, putting the MXene-CNT/cellulose aerogel into a tubular furnace, and carrying out carbonization so as to obtain the MXene-CNT/carbon aerogel composite material. According to the composite material prepared by the method, the unique design of the three-dimensional structure enables electromagnetic waves to enter more easily, incident waves are attenuated through multiple times of reflection and scattering in the porous structure, and the attenuation of the incident waves is further promoted through the synergistic effect between MXene and CNT, so that excellent electromagnetic shielding performance is obtained; and the application requirements in the fields of aerospace, electronic packaging and the like can be met.

The invention belongs to the technical field of wave-absorbing materials, and particularly relates to a composite wave-absorbing material and a preparation method thereof. The preparation method of the composite wave-absorbing material comprises the steps: (1) dissolving a cobalt source, urea and ammonium fluoride in water, performing a hydrothermal reaction, and performing cooling and high temperature annealing so as to obtain Co3O4; (2) dissolving Co3O4 and sodium sulfide in water, performing a hydrothermal reaction, and then carrying out high temperature annealing so as to obtain three-dimensional cobalt sulfide; (3) mixing the three-dimensional cobalt sulfide and a modifier aqueous solution, and performing modification so as to obtain modified three-dimensional cobalt sulfide; (4) compounding the modified three-dimensional cobalt sulfide and a graphene oxide aqueous solution so as to obtain a primary cobalt sulfide/graphene oxide composite material; and (5) performing heating reduction on the primary cobalt sulfide/graphene oxide composite material, and performing drying so as to obtain the composite wave-absorbing material. Through the preparation method, the technical defectsof a narrow frequency band, low efficiency and a complicated preparation process of a traditional graphene-based composite wave-absorbing material are overcome.

The present invention discloses a fuse tube with the function of wave filtration, and the fuse tube includes a metal wire and a tube; wherein, the metal wire is arranged in the tube which is filled with granular electric wave absorption materials. The granular size of the electric wave absorption materials stands at 50 items to 300 items. The advantage is that the tube is filled with granular electric wave absorption materials that can well absorb or isolate the interference of miscellaneous waves, at the same time, reduce and restrain the influences of the miscellaneous wave interference produced in the working of the machine on other equipments via a power supply loop. By entering into the front end of the machine power supply, the function of wave filtration can be effectively brought into full play, thus letting the machine have better anti-interference capability in the increasingly serious ambience of electromagnetic interference and have more stable working performance and the state of the machine.

The invention discloses an alkyl bithiophene-2-fluorobenzene-bridged triphenylamine co-sensitizer and a preparation method thereof. The structural formula of the co-sensitizer is shown in the description, wherein R in the formula represents C1-C10 alkyl. The preparation method of the co-sensitizer is simple, the absorption degree in an ultraviolet area is high, and the co-sensitizer can be used for preparing a dye-sensitized solar cell. The absorption of ruthenium-complex photosensitive dyes in the ultraviolet area is enhanced, and the photoelectric performance of the dye-sensitized solar cellcan be improved.

The invention discloses a ferrite-based low frequency electromagnetic wave-absorbing material and a preparation method thereof. The ferrite-based low frequency electromagnetic wave-absorbing particlesare of core-shell structures; the core-shell structures comprise micron-sized lithium zinc ferrite particles and nano-sized iron sheets. The preparation method includes: a sol-gel method, a high-temperature calcination method and an in-situ reduction method; the lithium zinc ferrite is prepared by the sol-gel method and high-temperature calcination; and the iron sheets grow on surfaces of the prepared lithium zinc ferrite through the in-situ reduction method. The invention can provide an electromagnetic wave-absorbing agent based on the lithium zinc ferrite; the lithium zinc ferrite has a good electromagnetic wave absorption effect in the low frequency electromagnetic band of 0.1-4 GHz.

The invention relates to a zinc-doped Ag-In-S quantum dot luminescent material and a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing silver acetate, indium acetate, powdered sulfur and zinc acetate according to a stoichiometric ratio, then mixing the silver acetate, the indium acetate, the zinc acetate and a certain amount of 1-octadecene and oleylamine, heating to 160-200 DEG C, adding a sulfur precursor solution formed by mixing the powdered sulfur and the oleylamine, carrying out heat preservation reaction for a period of time, and obtaining the Ag-In-S quantum dot luminescent material with the doping amount of 5%-30%. The quantum dot luminescent material prepared by the method is spheroidic, the average diameter is (5.0 +/-0.5) nm, the absorption intensity is higher, the quantum dot luminescent material has high luminescent intensity from visible light to near-infrared light, the fluorescent quantum yield is increased from 8.34% to 32.90% due to doping of Zn < 2 + >, the power conversion efficiency is also improved, and the material has a good application prospect in the field of quantum dot sensitized solar cells.

The invention belongs to the technical field of noise elimination, vibration reduction and noise reduction, and relates to a volcanic rock noise elimination tile, in particular to a noise elimination tile made from volcanic rocks and synthetic rubber. The volcanic rock noise elimination tile is composed of a natural volcanic rock hollow frame, multiple natural volcanic rock cones arranged in the natural volcanic rock hollow frame, and a synthetic rubber block for vulcanization and package of an assembled and combined body of the natural volcanic rock hollow frame and the multiple natural volcanic rock cones, wherein outer walls of both the upper surface board and the lower surface board of the natural volcanic rock hollow frame have certain radian; holes of the selected volcanic rocks are formed naturally in a non-uniform manner; the radian of the volcanic rock noise elimination tile is consistent with that of the surface of an underwater moving body; after packaged by the synthetic rubber, the volcanic rock hollow frame and the volcanic rock cones form the noise elimination tile together. The volcanic rock noise elimination tile can absorb sound waves of active sonar, remarkably reduce reflection strength of sound waves of the active sonar, suppress vibration generated by the underwater moving body itself, prevent machine noise inside the underwater moving body from radiating to the underwater moving body, remarkably lower self noise of the underwater moving body, reduce operating range of passive sonar of a detection side and the like.

The invention discloses a calibration method of a spectroscopic seawater COD sensor and the COD sensor. The method comprises the following steps: 1) dissolving 5-hydroxymethylfurfural in artificial seawater to prepare to-be-detected solutions with different concentrations; 2) measuring the absorbance of the to-be-detected solution under the wavelength of 254nm by adopting the spectroscopic seawater COD sensor; 3) measuring the COD value of the to-be-detected solution according to GB 17378.4-2007; 4) calculating according to the absorbance and the COD value to obtain an absorbance and COD value model curve; and 5) inputting the absorbance and the COD value model curve into the spectroscopic seawater COD sensor, and calibrating the spectroscopic seawater COD sensor. The conversion relation between the absorbance and the COD value is good in repeatability, the spectroscopic seawater COD sensor calibrated by the method can be directly used, the operation time is greatly shortened, chemical reagents are saved, the problem of blank calibration materials of the spectroscopic seawater COD sensor is solved, and the method is high in accuracy and good in repeatability.