1023 results about "Uv absorbance" patented technology

A process for modifying the surface of an inorganic or organic substrate with strongly adherent nanoparticles is described, providing to the surface modified substrate durable effects like hydrophobicity, hydrophilicity, electrical conductivity, magnetic properties, flame retardance, color, adhesion, roughness, scratch resistance, UV-absorbance, antimicrobial properties, antifouling properties, antiprotein properties, antistatic properties, antifog properties, release properties. In this process, an optional first step a) a low-temperature plasma, ozonization, high energy irradiation, corona discharge or a flame is caused to act on the inorganic or organic substrate, and in a second step b) one or more defined nanoparticles or mixtures of defined nanoparticles with monomers, containing at least one ethylenically unsaturated group, or solutions, suspensions or emulsions of the afore-mentioned substances, are applied, preferably at normal pressure, to the inorganic or organic substrate. In a third step c) suitable methods are applied to dry or cure those afore-mentioned substances and, optionally, in a fourth step d) a further coating is applied on the substrate so pretreated.

The invention discloses an ultraviolet fluorescence double-signal water quality monitoring device taking an LED (light emitting diode) as a light source and an application method of the device, and belongs to the field of environmental monitoring and water treatment. The ultraviolet fluorescence double-signal water quality monitoring device taking the LED as the light source consists of a sample collecting part and a detection part. The application method comprises the steps of selecting a deep ultraviolet LED lamp light source with specific wavelength and a photoelectric detector component according to a three-dimensional fluorescence atlas, detecting fluorescence intensity and ultraviolet absorption at the specific wavelength at the same time and calculating a ratio of the fluorescence intensity to the corresponding ultraviolet absorption. According to the device, no chemical reagent is consumed, monitoring of total concentration change of soluble organic matters in a water body can be realized, change of concentration of fluorescence ingredients such as proteins and humus can be reflected at the same time, and the sensitive, quick, efficient, economical, easy and information-rich on-line monitoring device is provided for the water treatment.

The invention relates to the field of analytical chemistry and food safety, and provides a high performance liquid chromatography detection method for residual quantity of multiple ultraviolet absorbents in cosmetics. A cosmetic sample of 0.4g is weighed and placed in a plastic centrifuge tube of 50 ml, sample extraction liquid of 20ml is added, after the cosmetic sample of 0.4g and the sample extraction liquid of 20ml are mixed for 2 minutes in a vortex mode, sonic oscillation extraction is carried out for 20 minutes, 8000 revolutions per minute centrifugation is carried out for 10 minutes and, and supernate is to be purified; and after test solutions sequentially pass through microfiltration membranes of 0.45 micrometer and 0.20 micrometer, a high performance liquid chromatograph is adopted to carry out qualitative determination and quantitative assay. The detection method has the advantages of being simple, fast, accurate, efficient, and the like, and can detect 12 ultraviolet absorbents at the same time. Technical indexes of detection minimum, the recovery rate, the degree of precision, and the like all meet relevant demands for ultraviolet absorbent detection in sun block cosmetics at home and abroad. The method is suitable for detection and monitoring of the ultraviolet absorbents in the sun block cosmetics, and has great significance on promoting of import and export trade of cosmetics of our country, ensuring of safety of the cosmetics, and guarantee of human body health.

The composite of the cellulose and the nanometer titanium oxide and its preparation method and use are disclosed. It is produced by: making the suspending liquid by dispersing the nanometer titanium oxide particle into the 7-8% NaOH and 10-13% urea(wt%), adding in the cellulose after cooling it down to -8--15deg.C , stirring at the room temperature, scraping pellicle and spraying filament after filtering and degassing, solidifying and revivifying in the coagulator. It features: the intensity, the braking extensibility, flexibility of the pellicle and filament of the regenerated cellulous remains in the cellulose and the nanometer titanium oxide, endowed the new functions such as antisepsis activity and absorption of the ultraviolet ray. Its advantages include: easy process, no pollution of dissolvent, convenient operation, low cost, and high intensity of the composite.

The present disclosure provides multicoat systems exhibiting ultraviolet (UV) stability after ultraviolet exposure and moisture exposure. The systems comprise at least one primer (G), at least one pigmented coating (P) disposed on a surface of the primer, and at least one ultraviolet (UV) absorber which has an absorption maximum of at least 370 nm. The pigmented coating (P) may be comprised of two or more coatings (P1), (P2) to (Pn). The multicoat systems may also comprise a transparent coating material (T) to form a transparent coating (K). The present multicoat systems demonstrate ultraviolet stability, reduced delamination of the pigmented coat from the primer and are available in a variety of shades for use in the finishing, refinishing and coating of component parts.

The present disclosure also provides for a process for producing the multicoat system, and provides for the use of the system.

The present invention provides a means of greatly reducing interferences from mercury vapor, UV-absorbing compounds and water vapor in the measurement of ozone by UV absorbance. A heated graphite scrubber destroys greater than 99% of ozone passing through it while reducing biases from typical atmospheric UV-absorbing interferents by large factors compared to conventional ozone scrubbers. Substitution of a heated graphite scrubber in place of traditional ozone scrubbers such as hopcalite, metal oxides and heated silver scrubbers, results in a more accurate measurement of ozone by reducing the responses to UV-absorbing interferences and water vapor. The heated graphite scrubber also may be used in combination with other ozone sensors, such as electrochemical and HMOS sensors, to provide a reference measurement with ozone selectively removed and thus greatly reduce contributions from interfering species in those measurement devices as well.

The invention discloses an ultraviolet-resistant blue-light-absorbable optical bonding agent composition and an optical bonding piece with the bonding agent layer. The optical bonding agent composition comprises 100 parts of optical bonding agent, 1-10 parts of crosslinking curing agent, 0.01-5 parts of ultraviolet-resistant absorbent and 0.001-1 part of blue light absorbent. The ultraviolet-resistant blue-light-absorbable optical bonding agent composition and bonding piece have high light transmittance, low haze and favorable ultraviolet (with the wavelength of 300-380nm or so) shielding capacity, can absorb harmful blue light (400-470nm) to the human body in the visible portion, can be widely used as a current screen display device lamination body or intelligent screen protective film or other products capable of resisting ultraviolet and blue light (such as sunglasses, polaroids and the like), and greatly lower the injuries of ultraviolet and blue light to the skin and eyes of the human body.

Alkali lignin is a main by-product of the papermaking industry of our country, and sever environmental pollution will be caused by direct discharge of alkali lignin. The invention discloses a preparation method of an industrial alkali lignin/polyvinyl alcohol cross-linked thin film, so as to increase utilization ratio of lignin, reduce environmental pollution and ease the resource crisis. The industrial alkali lignin/polyvinyl alcohol cross-linked thin film is prepared by following steps, industrial alkali lignin and polyvinyl alcohol (PVA) are taken as raw materials, and are crosslinked by a cross-linking agent; and then the mixture is subjected to tape casting so as to obtain the alkali lignin/polyvinyl alcohol cross-linked thin film. An optimized preparation technology is obtained based on mechanical properties. The mechanical properties of the industrial alkali lignin/polyvinyl alcohol cross-linked thin film are better than that of industrial polyvinyl alcohol films; absorption rate on ultraviolet light is about 100%; and transmittance is reduced to a certain degree. Blending compatibility of alkali lignin and PVA is excellent; the surfaces of alkali lignin and polyvinyl alcohol thin films, which are prepared by blending or crosslinking, are smooth; and phase separation is not caused. Thermal stability of the industrial alkali lignin/PVA cross-linked thin film is increased. The industrial alkali lignin/PVA cross-linked thin film can be used as an excellent ultraviolet absorption material, and it is possible to develop a novel specific packaging material or mulching film.

The invention discloses nano cellulose containing a cinnamyl functional group and a preparation method and application of the nano cellulose and relates to the technical field of modified preparation and application of the nano cellulose. According to the preparation method, the nano cellulose is prepared through introducing the cinnamyl functional group to the nano cellulose; the cinnamyl functional group introduced to the nano cellulose is a micromolecule or a polymer of the cinnamyl functional group. According to the nano cellulose containing the cinnamyl functional group, excellent properties of the nano cellulose, such as excellent mechanical property, large specific surface area and good biocompatibility, are still kept; and meanwhile, the dispersity of the nano cellulose in an organic solvent and a hydrophobic material is improved. In addition, the nano cellulose containing the cinnamyl functional group has excellent ultraviolet absorption performance, and the nano cellulose containing the cinnamyl functional group is subjected to cross-linking reaction under ultraviolet radiation. The nano cellulose containing the cinnamyl functional group has a wide application prospect.

The invention discloses a cysteine fluorescence probe adopting coumarin as a fluorophore. The cysteine fluorescence probe is 2-(3-acetyl) coumarin-based acrylate and has the chemical structural formula shown as a formula (I) described in the specification. The 2-(3-acetyl) coumarin-based acrylate disclosed by the invention can act with cysteine selectively, becomes light yellow from colorless, has a fluorescence enhancing effect, can be distinguished by the naked eyes, and also can be analyzed by ultraviolet absorption and fluorospectrophotometry. The cysteine fluorescence probe disclosed by the invention has the advantages that trace high-sensitivity detection to the cysteine can be realized and the application value is important.

The present invention relates to a benzotriazole compound with blocked amine groups, as shown in Formula I, wherein, general symbols are defined according to the Claim of Right 1. The present invention also relates to a method of preparing the compound, and an application of the compound in the present invention or the compound prepared in the preparation method as a light stabilizer. The compound can be used for effectively stabilizing thermosetting resin, thermoplastic resin, polyamide or polyester fiber, organic dye, cellulose paper preparation, paper for photographic film, printing ink, white or colored wax, and the like, and has the effective activeness for ultraviolet absorption and light stability for blocked amine.

The invention relates to a method for synthesizing 4-(4,6-dichloro-1,3,5-triazine-2-oxo)-2-hydroxyl phenyl benzophenone serving as a novel reactive ultraviolet absorbent (UV-DTHM) and application of the UV-DTHM to the uvioresistant arrangement of cotton fabrics, and belongs to the technical field of functional aids. The method comprises the following steps of: performing etherification reaction of diphenyl ketone (UV-O) and trichloro-s-triazine (CYC) which serve as raw materials under the catalysis of sodium hydroxide, wherein a ratio of UV-O to CYC to NaOH is 1:2.0:1.5; reacting in a mixed solvent of acetone and water at the temperature of 0 DEG C for 5 hours to obtain the UV-DTHM, and the yield of the UV-DTHM is 82.5 percent. The UV-DTHM has the excellent ultraviolet absorption performance, and is high in heat stability; and active groups are contained in a molecular structure and can be reacted with substances containing groups such as animo, hydroxyl and the like. The UV-DTHM is applied to the uvioresistant arrangement of white cotton fabrics to achieve an excellent uvioresistant effect (the value of an ultraviolet protective factor (UPF) reaches 67), and the UPF value is kept at 43+/-3 basically after the cotton fabrics are soaped for 30 times, so the UV-DTHM has an excellent soaping-resistant effect.

The invention relates to an anti-static weather-resistant PVC matt sheets for decoration and method for preparation, wherein the weight percentage of the raw materials in the formula being, polychloroethylene 70-75%, titanium white 2-3%, nano calcium carbonate 10-12%, delustring agent 2-5%, antistatic agent 2-5%, anti-ultraviolet absorbent 0.4-0.6%, reinforcing agent 5-8%, heat stabilizer 1-1.5%, lubricating agent 1-1.5%.

The present invention provides polysulfone-based hollow fiber membranes having high water permeable performance and for use in therapy of chronic renal failures, said hollow fiber membranes having high safety and high stability in performance and being excellent in module-fabricating workability. The present invention also provides a process for manufacturing the same. The present invention relates to a bundle of a plurality of selectively permeable polysulfone-based hollow fiber membranes wherein the amount of a hydrophilic polymer eluting from each hollow fiber membrane is not larger than 10 ppm, and wherein the content of the hydrophilic polymer in the outer surface of the hollow fiber membrane is 25 to 50 mass %, and this bundle is characterized in that any of extracted solutions from ten fractions of said bundle, obtained by dividing the bundle at substantially regular intervals along the lengthwise direction, shows a maximum value of smaller than 0.10 in UV absorbance at a wavelength of 220 to 350 nm, with the proviso that the extracted solutions are obtained by the extraction method for tests regulated in the approval manufacturing standards for dialytic artificial kidney devices; and in that the difference between the maximum and the minimum out of the maximum values of UV absorbance of the extracted solutions from the respective fractions is not larger than 0.05.

The invention relates to a triazine compound which is as shown in general formula I and contains hindered amine groups, wherein general symbols are as defined in claim 1. The invention further relates to a method for preparing the compound and an application of the light stabilizer. The triazine compound containing the hindered amine groups can effectively stabilize thermosetting resin, thermoplastic resin, polyamide or polyester fiber, organic dyes, cellulose paper preparations, paper for photographic films, printing ink, white or colored wax and the like, and has the advantages of very effective ultraviolet absorption activity and hindered amine light stability.

A liquid composition free from N-alkylpyrrolidones and hydroxyl amine and its derivatives, having a dynamic shear viscosity at 50° C. of from 1 to 10 mPas as measured by rotational viscometry and comprising based on the complete weight of the composition, (A) of from 40 to 99.95% by weight of a polar organic solvent exhibiting in the presence of dissolved tetramethylammonium hydroxide (B) a constant removal rate at 50° C. for a 30 nm thick polymeric barrier anti-reflective layer containing deep UV absorbing chromophoric groups, (B) of from 0.05 to <0.5% of a quaternary ammonium hydroxide, and (C) <5% by weight of water; method for its preparation, a method for manufacturing electrical devices and its use for removing negative-tone and positive-tone photoresists and post etch residues in the manufacture of 3D Stacked Integrated Circuits and 3D Wafer Level Packagings by way of patterning Through Silicon Vias and/or by plating and bumping.

The invention discloses a method and a device for measuring sulfur content in coal by ultraviolet absorption spectroscopy. In the measurement method, the decomposition scale and a threshold are determined adaptively by combining empirical mode decomposition with 3sigma criterion, and non-stationary characteristics of differential absorption degree per se can be fully retained, so the spectral interference problem caused by dust, water vapor and background gas in combustion gas is effectively solved; the instantaneous concentration of SO2 is obtained through calculation according to the differential absorption degree after noise reduction and trend term removal, and the total sulfur content accumulated in the coal sample combustion gas is calculated through the gas flow; the sulfur content in the coal can be obtained by dividing the coal sample amount by the total sulfur content separated from the coal sample combustion; and the pretreatment process needed to be performed on the combustion gas by coulometric titration and an infrared absorption method is avoided. The device for measuring the sulfur content in the coal by the ultraviolet absorption spectroscopy comprises a combustion furnace, a measuring chamber, an ultraviolet light source, a spectrometer, an air purifying device, a flow meter, a waste gas treatment device, a computer, and the like.

The invention discloses a smoke mercury emission monitoring system and method. The smoke mercury emission monitoring system comprises a sampling device, a pre-processing device and a mercury monitoring device, wherein the sampling device is used for collecting smoke when the system works; the pre-processing device comprises a catalytic reactor which is used for converting mercury in an oxidation state to the mercury in an element state; the mercury monitoring device comprises an ultraviolet light source, a measuring cell and a mercury analyzer; the measuring cell is used for absorbing ultraviolet lights through the pro-processed smoke; and the mercury analyzer is used for recording the absorbance of the absorption and calculating a concentration of the mercury according to the absorbance. According to the smoke mercury emission monitoring system disclosed by the invention, the mercury content in the smoke is directly monitored by using an ultraviolet absorption spectrum without a mercury gathering unit. The smoke mercury emission monitoring system has a fast measurement speed and can be used for continuously monitoring in real time in true sense.

The invention relates to a microcapsule with an integrated ultraviolet shielding function and a preparation method thereof. The microcapsule is composed of an anti-ultraviolet capsule wall, an anti-ultraviolet emulsifier and an anti-ultraviolet capsule core. Compared with a microcapsule with an ultraviolet absorption material added in a capsule core only in the prior art, the capsule wall, the capsule core and the selected and used emulsifier in the prepared microcapsule have the anti-ultraviolet functions, so that the microcapsule has the more excellent anti-ultraviolet performance.

The invention provides a 1-(7-ethoxycoumarin)-4-(2-methyl-8-methoxyquinoline)-1, 2, 3-triazole ratiometric fluorescence or ratiometric ultraviolet absorption probe agent and preparation and application thereof, and belongs to the technical fields of organic synthesis and analytic chemistry. The preparation method is characterized in that an intermediate, namely, 2-methyl-8-(propyn-2-yl alkoxy) quinoline, reacts with 7-(2-azidoethoxy)-coumarin to obtain a compound a of which triazolyl is connected with two fluorophores, namely, coumarin and quinoline, wherein the compound is 1-(7-ethoxycoumarin)-4-(2-methyl-8-methoxyquinoline)-1, 2, 3-triazole. The preparation method has the advantages that the reaction raw materials are easy to obtain, the synthesis method is simple, and the compound can be obtained by three-step reaction; the compound a generates ratiometric fluorescence at 480nm and 390nm in alcohol/aqueous solution, and trace Al<3+> can be measured accordingly; ratiometric ultraviolet absorption is produced at 253nm and 243nm, and trace Al<3+> can be measured accordingly. The probe agent is the probe agent being high in sensitivity, high in accuracy and high in selectivity and used for detecting Al<3+> ions through ratiometric fluorescence and ratiometric ultraviolet absorption. The structure formula of the compound a is as shown in the specification.