74results about How to "Strong absorbance" patented technology

The present invention provides metal fine particles which have selective wavelength absorption characteristics in a wavelength region from visible light to near infrared light, and have sharp absorption characteristics, and influences little the surrounding wavelength, and therefore, they yield tones having high chroma. The present invention provides metal fine particles wherein an aspect ratio is in a range from 1.1 to 8.0, a maximum absorption wavelength in plasmon absorption is in a range from 400 nm to 1,200 nm, and an absorption coefficient at a peak position of the maximum absorption wavelength is in a range from 6,000 to 20,000 L/mol.cm (measurement concentration: 1.6x10-4 mol/L, and solvent:water).

The invention discloses an environment-friendly latex paint and a preparation method thereof, and relates to the technical field of latex paint. The latex paint is prepared from the following raw materials in parts by weight: 85-105 parts of styrene-acrylic emulsion, 35-45 parts of nano-silica sol, 20-25 parts of diatom ooze, 10-15 parts of nano-TiO2, 10-15 parts of tourmaline anion powder, 10-15parts of glutinous rice glue, 7-8 parts of plant dehydrated filaments, 7-8 parts of antibacterial powder, 4-6 parts of active powder, 4-6 parts of essential oil components, 20-22 parts of an aid and 70-75 parts of deionized water. The latex paint has relatively powerful adhesive force, a paint film has light smell, low VOC and high adhesive force and is combined with the wall stably, peeling and bursting of the paint surface are not easily produced, and weather resistance of the latex paint is greatly improved.

A labeling reagent having a distinct Raman, or surface enhanced Raman, spectral signature is used for the control and analysis samples. The labeling reagents can be fluorescent dyes with different isotopic substituents, such as the substitution of some hydrogen atoms for deuterium atoms. Such labeling does not have any detectable effect on separation retention. Raman spectroscopy is used for detection purposes. By combining SERS and SERRS, a concentration ratio prediction error of less than 3% can be obtained over four orders of magnitude of total concentration with up to a factor of 3 concentration ratio range. The method is reliable, reproducible and more sensitive than methods based on absolute SERS/SERRS intensity correlations, with no internal standard, or using a different molecule (rather than an IEIS) as a SERS/SERRS internal standard.

The invention discloses naphthalene tetracarboxylic diimide-naphtho dithiophene-containing copolymer and a preparation method as well as application thereof. The polymer is a compound which has a general formula shown in the specification, wherein R1 and R2 are selected from H, C1-C20 alkyl groups, phenyl groups or substituted phenyl groups with C1-C20 alkoxyl groups; R3 and R4 are selected form C1-C20 alkyl groups or alkoxyl groups; and n is an integer of 1-100. The naphthalene tetracarboxylic diimide-naphtho dithiophene-containing copolymer is prepared through Stille reaction with a simple reaction synthesis route and low technological requirements, and has the characteristics of high dissolubility, strong absorbency, superior charge transfer performance, capability of extending an absorption range to a near infrared region, capability of increasing utilization rate of sunlight, wide application and the like.

The invention, belonging to the field of photoelectron material, discloses a naphthalene tetracarboxylic acid diimide-dithiophene quinoxaline copolymer of formula (I), wherein, n represents an integer between 1 and 100, R1 and R2 represent hydrogen, C1 to C20 alkyl, C1 to C20 alkyloxy benzene, and R3 and R4 represent C1 to C20 alkyl or alkyloxy. The invention also provides a preparation method and applications of the naphthalene tetracarboxylic acid diimide-dithiophene quinoxaline copolymer. According to the invention, by forming an electron donor-acceptor structure, the band gap of the polymer is adjusted, and the absorption band edge is pushed to the infrared and near infrared region; and the modified naphthalene tetracarboxylic acid diimide has good dissolvability, strong absorbance, and wide absorption region that extends to the near infrared region, improves the utilization rate of sunlight, and has excellent charge transport performance.

The invention discloses a preparation method of a high-temperature-resistant light absorption coating. The preparation method comprises the following steps: (1) dispersing a nano carbon material, a surface modifier, a matting material, aromatic diamine and aromatic dianhydride in an organic solvent to prepare a composite suspension; (2) carrying out surface roughening treatment after the substrate is cleaned; and (3) depositing the composite suspension liquid obtained in the step (1) on the substrate treated in the step (2) in an aerial fog spraying or brushing manner, and heating and curing to obtain the high-temperature-resistant light absorption coating. According to the invention, by adjusting the types and proportions of the components in the composite suspension and combining with adaptive spraying process parameters, the components in the suspension can have a synergistic effect, so that the coating has a micro-nano porous structure and also has good mechanical properties. The high-temperature-resistant light absorption coating prepared by the method is good in binding force with a substrate and excellent in light absorption performance, and has a wide application prospect in the fields of optics, navigation and the like.

The invention relates to a perylene tetracarboxylic dianiline conjugated polymer which has high solubility and high film forming processing performance and can effectively utilize sunlight and a preparation method and application thereof. The perylene tetracarboxylic dianiline conjugated polymer utilizes high carrier mobility of thiophene [3,2-b] bithiophene and has the advantage of solution processibility. The thiophene [3,2-b] bithiophene is copolymerized with a narrow-band system monomer diazosulfide unit and perylene tetracarboxylic dianiline so as to regulate a band gap of the polymer. An absorption edge of the perylene tetracarboxylic dianiline conjugated polymer is pushed to an infrared and near-infrared region. Decorated perylene tetracarboxylic dianiline have high solubility, strong absorbance and wide adsorption range and can be extended to the near-infrared region. The sunlight utilization rate of the perylene tetracarboxylic dianiline conjugated polymer is improved. The perylene tetracarboxylic dianiline conjugated polymer has excellent charge transfer performance and has wide application prospect in the fields of an organic solar cell and the like.

The invention is applicable to the technical field of organic semiconductor materials, and provides a naphthalenetetracarboxylic acid diimide copolymer containing benzothiophene unit, and a preparation method and application thereof. The copolymer has the following structural formula. The benzothiophene unit and the naphthalenetetracarboxylic acid diimide unit are polymerized, so that the copolymer provided by the invention has the advantages of high solubility, strong absorbance, wide light absorption range and the like; the light absorption range can be extended to the near infrared region,so that the sunlight utilization ratio is enhanced; and meanwhile, the naphthalenetetracarboxylic acid diimide copolymer containing benzothiophene has excellent stability and charge transmission performance.

The invention discloses a reduced graphene oxide film photoelectric detector comprising a reduced graphene oxide film and a surface electrode. The reduced graphene oxide film is a substrate-containingreduced graphene oxide film or a substrate-free reduced graphene oxide film. The surface electrode is a symmetric interdigital electrode, and is prepared through metal vapor plating on the reduced graphene oxide film. The preparation process of the invention is very simple, and the reduced graphene oxide film photoelectric detector obtained by the method has the characteristics of high response rate, controllable area and wide spectrum detection at normal temperature and at atmospheric pressure. It is found that a self-supporting substrate-free reduced graphene oxide film can be obtained through a very simple substrate stripping method, and the self-supporting substrate-free reduced graphene oxide film photoelectric detector prepared by metal vapor plating has enhanced photoelectric response property and high light absorbance.

The invention which belongs to the optoelectronic material field discloses perylenetetracarboxylic diimide copolymers. The perylenetetracarboxylic diimide copolymers have a structural formula represented by formula (I). In the formula (I), n is an integer between 1 and 100; R1, R2 and R3 are hydrogen, C1-C20 alkyl, C1-C20 alkoxy, phenyl, or alkoxybenzene; R4 is C1-C20 alkyl; and R5 is hydrogen, C1-C20 alkyl, C1-C20 alkoxy, or phenyl. The invention also provides a preparation method and an application of the perylenetetracarboxylic diimide copolymers. The diphenyl silole unit-contained perylenetetracarboxylic diimide copolymers have the advantages of good dissolving performance, high carrier mobility, strong absorbance, wide light absorption range, and sunlight utilization rate improvement; and the preparation method which has the advantages of simple process and high yield is easy to operate and control.

The embodiment of the invention relates to an A-A type conjugated polymer based on isoindigo-blue and a preparation method and application thereof.The structural general formula of the A-A type conjugated polymer based on isoindigo-blue is shown in the description, wherein Ar is an aromatic compound fragment, and R is alkane of C1-C32, alkenyl of C2-C32 and alkyne or ether oxygen or alkyl chain amines or sulfydryl of C2-C32; n is an integer larger than or equal to 4 and smaller than or equal to 100.According to the A-A type conjugated polymer based on isoindigo-blue, the solubility is good, the light absorbance is strong, the absorption range is wide, the sunshine utilization rate is high, the LUMO energy level is low, the A-A type conjugated polymer can replace fullerene and derivatives thereof as an acceptor material for preparing a full-polymer organic light detector and an organic solar cell.

The invention discloses an organic semiconductor material based on fluorene, anthracene and quinoxaline, a preparation method thereof and an application thereof. The organic semiconductor material has a structure represented by formula (P). In the formula (P), n is an integer greater than 1 and equal to or less than 200, and m is an integer equal to or greater than 1 and equal to or less than 20;x and y are positive real numbers, and the value of x+y is 1; R1 and R2 are hydrogen, fluorine, cyan, C1-C40 alkyl, alkoxy, aryl, or heteroaryl respectively; and R3 is hydrogen, phenyl, C1-C20 alkyl,or C1-C40 arylalkoxy. The organic semiconductor material based on fluorene, anthracene and quinoxaline of the invention, which has a high carrier mobility, a strong absorbance, and a wide light absorption range, allows the sunlight utilization rate to be improved; and the preparation method of the organic semiconductor material, which has the advantages of simple technology and high yield, is easy to operate and control.

The invention relates to an outdoor decoration Zisha coating material for building, and a preparation method thereof, particularly to a building coating material and a preparation method thereof, wherein the building coating material comprises, by weight, 7.0% of a dispersion water, 0.2% of a thickener EBS-481F, 0.1% of a PH value regulator RF-86, 1.0% of a cosolvent ethylene glycol, 0.8% of a film forming aid TEXANOL, 0.5% of a dispersant RT-8027, 0.1% of a fungicide 623, 13.7% of a lacquer emulsion PX-7015, the material obtained by diluting 0.1% of a thickener 730 with 0.5% of water, 20-40% of Zisha clay with a particle size of 80-120 mesh, 10-30% of Zisha clay with a particle size of 40-80 mesh, 5.0-7.5% of Zisha clay with a particle size of 20-40 mesh, and 1.0% of a waterproof agent R-75. The preparation method comprises: breaking Zisha ore, firing, crushing, screening to achieve a particle size of 80-325 mesh, and mixing to obtain the product. According to the present invention, the prepared Zisha coating material has significant comprehensive effects, particularly such as air purification, formaldehyde removing, external body thermal insulation enhancing, ultraviolet radiation preventing, natural color achieving, wall crack preventing.

The invention relates to a photosensitive composition excellent in light absorption and suitable for forming a fine pattern, in particular to a photosensitive composition, a cured material thereof and a dry film. Through a disposable exposure method for performing exposure through an ultraviolet lamp and a light mask or a direct description method utilizing light from an ultraviolet lamp or short-wavelength lasers, the photosensitive composition which is used for forming the cured part of the expected pattern and applies the uncured part of the expected pattern to developing through an alkaline aqueous solution is formed. The dry film is obtained by coating a carrier film with the composition and then performing drying. Preferentially, when the drying film coating thickness of the photosensitive composition before exposure is 25 micrometers, the light absorbency for light with the wavelength of 355 nm-375 nm is 1.2-1.8, and the light absorbency for light with the wavelength of 405 nm is above 0.6.

The invention discloses a preparation method of blue niobium pentoxide. The preparation method comprises the following steps: taking an amorphous niobium oxide precursor, heating to 500-600 DEG C, andcalcining for 2-4 h to obtain white niobium pentoxide; and adding the white niobium pentoxide into an aqueous hydrochloric acid solution, performing ultrasonic dispersion, then adding metal powder, stirring for 5 min or above, centrifuging, and taking, washing and drying the obtained precipitate to obtain the blue niobium pentoxide. The invention further discloses the blue niobium pentoxide is prepared according to the method. The invention also discloses an application of the blue niobium pentoxide in preparation of a photothermal conversion material. The method is simple in process, free ofdangerous reagents, low in raw material cost, short in production period and capable of achieving industrial large-scale rapid production; the blue niobium pentoxide has a strong absorption effect onvisible light and near-infrared light; and the blue niobium pentoxide has good dispersibility and stability in water, has biocompatibility, and has a wide application prospect in the biomedical fields of photothermal therapy and the like.

The invention discloses a method for detecting tobacco leaf reducing sugar. The method comprises the following steps: manufacturing a reducing sugar standard curve: adding a certain quantity of picric acid into glucose solutions with different concentrations, performing a heating reaction on sodium carbonate in boiled water for 10 min, detecting the light absorption values at 285 nm, and manufacturing the standard curve according to the concentrations and the light absorption values; and extracting soluble reducing sugars in tobacco leaves with boiled water, then adding a certain quantity of picric acid, performing a heating reaction on sodium carbonate in boiled water for 10 min to obtain a tobacco leaf reducing sugar to-be-detected solution, detecting the light absorption values at 285 nm, and calculating the content of the tobacco leaf reducing sugar according to the standard curve. The method has the advantages that the detection result is reliable, the repeatability is high, the operation is simple and convenient, popularization is convenient, and the method can be not only used for detecting the tobacco leaf reducing sugar but also widely applied to preliminary determination of other soluble reducing sugar.

Belonging to the technical field of nano and photocatalysis, the invention discloses a method for preparation of nano-CoFe1.95Y0.05O4 powder and catalytic degradation of methyl orange. A sol-gel method is employed to prepare the target product by controlling the amount of Y(NO3)3.6H2O, the baking temperature and the like, X-ray diffraction characterization finds that the XRD spectrum of the sample is completely consistent with PDF card (22-1806); TEM characterizes that the particle size is in the range of 16-26nm; diffuse reflection spectrum determination indicates that the CoFe1.95Y0.05O4 band gap is 1.71ev wide, and the ultraviolet region and visible region have strong absorption. A CoFe1.95Y0.05O4-H2O2-pH4 composite system is designed to study the methyl orange solution photocatalytic reaction, and experiments prove that: after 500w xenon lamp illumination on the solution for 2h, the methyl orange degradation rate is close to 100%. The nanocrystals synthesized by the method provided by the invention have the advantages of strong magnetism, high efficiency and complete photocatalytic degradation, etc. At the same time, the cost of the required raw materials is low, and the process is simple, can realize zero emission and has low energy consumption, thus being easy for industrial production.