211 results about "Chemical combination" patented technology

The invention relates to the technical field of composite pipes, and discloses a wear-resistant acid-corrosion-resistant environment-friendly anti-explosion PE pipe. The pipe adopts a multi-layer co-extrusion structural design, and comprises a wear-resistant inner layer, a reinforced middle layer and a protective outer layer. High-density polyethylene is used as a base material, silicon carbide particles and aluminum oxide particles with the surfaces subjected to multifunctional modification are combined to serve as reinforcing filler, and functional polyethylene is used as a base interface modification material, so that the problems that in a traditional pipe, particles and a base interface are low in bonding force, uneven in dispersion, prone to falling off and the like are solved. Carboxyl and unsaturated double bonds are introduced into the functionalized polyethylene through a maleic anhydride grafting technology, so that efficient chemical combination of particles and a matrix is realized, and the mechanical property and the chemical stability of the composite material are improved. The inner layer enhances wear resistance through high particle content, the middle layer provides support and corrosion resistance, and the outer layer improves weather resistance and protection performance of the pipe.

The invention discloses a preparation method and application of polyvinyl alcohol assisted molded aramid nanofiber aerogel. The preparation method of the aerogel comprises the following steps: pulping aramid pulp, homogenizing and centrifuging to obtain an aramid nanofiber aqueous dispersion; dissolving polyvinyl alcohol in deionized water to obtain a polyvinyl alcohol aqueous solution; and mixing the aramid nanofiber aqueous dispersion and the polyvinyl alcohol aqueous solution, placing the mixture in a container, and carrying out liquid nitrogen unidirectional freezing, freeze drying and low-temperature heat treatment to obtain the aerogel. According to the aerogel prepared by the method, due to the physical winding effect of a polyvinyl alcohol polymer chain and the chemical combination effect of a hydrogen bond, dispersion of the aramid nanofiber in a water-based solvent is synergistically promoted; therefore, the phenomena of agglomeration and adhesion, non-uniform forming, slag and powder falling and the like caused by Van der Waals interaction, hydrophilic and hydrophobic interaction and the like among the adjacent aramid nanofibers in the freezing casting process are avoided; the aramid nanofiber in the aerogel subjected to low-temperature heat treatment is close to single distribution, and a viscous polyvinyl alcohol molecular chain is converted into a conjugated carbon chain, so that the mechanical properties of compression, stretching and the like of the aerogel are remarkably improved. In addition, the aerogel can be used as a wave-absorbing material after being carbonized at a high temperature, has the advantages of thin thickness and light weight, and has the wave-absorbing capability of wide frequency band and strong absorption.

The invention relates to a crystalline form of indaziflam, a preparation method thereof, an agrochemical composition containing the crystalline form of indaziflam and a method for preparing the agrochemical composition.

Provided are methods and composition for treating skin barrier functions and associated disorders. Formulated compositions may be applied on human skin to maintain a desired skin surface pH over an extended period of time without irritating the skin. Maintaining the desired surface pH aids in treatment of eczema, in addition to other skin conditions.

The invention relates to the technical field of papermaking, and particularly provides label release paper and a preparation method thereof.The label release paper sequentially comprises a release layer, a bottom coating layer and a base material paper layer from top to bottom, and the release layer comprises polydimethylsiloxane; the bottom coating layer comprises an organic silane coupling agent; the base material paper layer sequentially comprises a surface layer, a modified paper layer and a bottom layer from bottom to top; wherein the surface layer and the bottom layer are both glassine paper; the density of the glassine paper of the surface layer is 1.15-1.20 g / cm < 3 >; and the density of the glassine paper at the bottom layer is 1.05-1.10 g / cm < 3 >. Polydimethylsiloxane is selected as the release layer, the release force of the adhesive can be remarkably reduced due to the fact that polydimethylsiloxane has ultralow surface energy, and the crosslinked polydimethylsiloxane layer is high in chemical inertness, low in heat resistance and moisture migration resistance, not prone to migration after being stored for a long time and easy to form chemical combination with the bottom coating layer, so that the adhesive force is improved.

The invention discloses a proportioning optimization method for efficiently balancing a chemical oil displacement system. The proportioning optimization method comprises the following steps: S1, collecting and sorting experiment and field data of the existing chemical oil displacement system; the oil displacement effect can be effectively improved by continuously optimizing the ratio of the chemical agents through experiments and numerical simulation, so that the recovery efficiency of an oil field is improved, the oil-water interface characteristics can be improved, the fluid viscosity can be reduced, the oil fluidity can be improved through the reasonable ratio of the chemical agents, and by analyzing the cost benefits of different ratios, the oil displacement effect can be effectively improved. The chemical agent combination with higher economical efficiency can be selected, the expenditure in the chemical oil displacement process is reduced, the oil displacement effect and cost are comprehensively considered, the resource utilization efficiency of the chemical oil displacement system is improved by optimizing the proportion, and it can be ensured that the selected proportion is not only theoretically effective but also theoretically effective through laboratory verification and on-site small-scale tests. And the method also has practical significance in practical application.

The invention relates to the technical field of hazardous chemical substance detection, and provides a hazardous chemical substance monitoring and early warning method and platform based on an industrial 3D visual sensor. The method comprises the following steps: acquiring multi-dimensional image information of a monitored area, and acquiring environmental parameter information of the monitored area; determining hazardous chemical substance information in the monitored area based on the multi-dimensional image information; the hazardous chemical substance information comprises the name of the hazardous chemical substance and the position of each hazardous chemical substance in the monitored area; performing combination treatment on all the hazardous chemicals to obtain a plurality of hazardous chemical combinations corresponding to all the hazardous chemicals; and for each hazardous chemical substance combination, determining whether the hazardous chemical substance combination causes potential safety hazards to the monitored area based on the name of the hazardous chemical substance in the hazardous chemical substance combination, the position of each hazardous chemical substance and the environmental parameter information. The method achieves the comprehensive prediction of the potential safety hazards in the monitored area, and facilitates the improvement of the safety of the monitored area.

The invention relates to the technical field of tread rubber, and discloses high-performance tire tread rubber based on a synergistic system and a preparation method thereof.The method comprises the following steps of first-stage mixing, second-stage mixing, third-stage mixing, final mixing and vulcanization molding. By adopting a composite vulcanization system composed of dicumyl peroxide and sulfur and cooperating with zinc methacrylate as a functional auxiliary agent, a dual synergistic cross-linked structure composed of a free radical cross-linked network and an ionic cross-linked network is formed in the vulcanization process, so that the uniformity and stability of the cross-linked network structure of the tread rubber can be effectively improved, and the service life of the tread rubber is prolonged. The reasonable regulation and control of the crosslinking density of the tread rubber in the vulcanization process are ensured, the problem that a traditional single vulcanization system cannot give consideration to the wear resistance and the dynamic heat generation performance is solved, the comprehensive mechanical property and the dynamic use performance of the tread rubber are further improved, and firm chemical combination between the reinforcing filler and rubber molecules is ensured.

The invention provides a preparation method of silicon dioxide aerogel microspheres. The silicon dioxide aerogel microspheres with excellent hydrophobicity are prepared by taking fly ash acid-soluble slag as a raw material. The method comprises the following steps: treating fly ash acid-soluble slag to obtain a sodium silicate solution; treating the sodium silicate solution to obtain silicon dioxide alcosol; respectively adding the silicon dioxide alcosol and ammonia water into an oil phase to form silicon dioxide wet gel microspheres; the preparation method comprises the following steps: carrying out surface modification on silicon dioxide wet gel microspheres by adopting an organosiloxane compound, and then washing and drying to prepare the silicon dioxide aerogel spheres. Wherein the organosiloxane compound comprises at least one of vinyl trimethoxy silane and vinyl tri (beta-methoxyethoxy) silane, and the organic siloxane compound comprises at least one of vinyl trimethoxy silane and vinyl tri (beta-methoxyethoxy) silane. The organosiloxane compound is hydrolyzed to generate silanol groups, the silanol groups are chemically combined with SiO2, moisture on the surface of SiO2 can be removed, hydrophobic groups can be connected to the surface of SiO2, and therefore the hydrophobicity of the silicon dioxide aerogel microspheres is improved.

The present invention pertains to the field of pharmaceutical technology. Specifically, the present invention relates to a zinc risedronate micro / nano adjuvant with sustained-release function formed by mineralization of zinc ions and risedronic acid as main components and its use as a vaccine adjuvant. The present invention also relates to a method for preparing zinc risedronate micro / nano adjuvant. The present invention also relates to a chemical composition, vaccine adjuvant and vaccine composition comprising zinc risedronate micro / nano adjuvant. The present invention also relates to a use of zinc risedronate micro / nano adjuvant as a vaccine adjuvant.

The invention belongs to the technical field of energetic materials and preparation, and particularly relates to a boron-aluminum alloy with a spherical composite layer structure and a preparation method of the boron-aluminum alloy. The boron-aluminum alloy is of a core-shell structure with aluminum as a shell layer to wrap a boron-aluminum alloy phase, the boron-aluminum alloy is prepared from, by weight, 35-60% of aluminum powder and 40-65% of boron powder, the D50 of the aluminum powder is 0.9-1 micron or 10-50 microns, and the D50 of the boron powder is smaller than or equal to 4 microns. The invention further discloses a preparation method of the boron-aluminum alloy. By the adoption of the method, the boron-aluminum alloy powder of various sizes and high chemical combination can be prepared, the powder sphericity degree is high, the fluidity is good, the chemical combination proportion is high, the particle size is controllable, and no impurity is introduced in the preparation process. During combustion, aluminum on the surface layer is combusted firstly, combustion of the boron-aluminum alloy powder inside can be driven, the ignition temperature is reduced, and the combustion efficiency is improved.

The invention provides a method and device for obtaining a general chemical combination for mixture toxicity assessment, and the method comprises the steps: carrying out the statistics of the total number of chemicals in a target environment, and constructing a compound detection matrix of the target environment according to the chemical concentration obtained through the detection of a sampling detection point and the total number of the chemicals; constructing a mapping relation between the chemicals and the analysis detection limits, and converting the compound detection matrix into a compound existence matrix based on the target chemical concentration and the analysis detection limits mapped by the target chemicals; based on the occurrence frequency of the candidate chemicals in the compound existence matrix and a first frequency threshold, constructing a first frequent item set of the chemicals; based on an item set optimization strategy, performing optimization from low-order to high-order chemical combination on the first frequent item set of the chemicals, and sequentially obtaining high-order frequent item sets; and based on the chemical first frequent item set and the sequentially obtained high-order frequent item sets, obtaining a general chemical combination. And the precision of toxicity assessment and risk evaluation of the environmental mixture can be improved.

A comprehensive utilization method of beneficiation-metallurgy-chemical combination for germanium-rich lignite includes the following steps: 1) germanium-rich lignite sizing and grinding, 2) catalytic pre-oxidation, 3) nitric acid leaching, and 4) recycling and enrichment of germanium solution. The high effective extraction of germanium from the germanium-rich lignite was achieved via a combination of mineral beneficiation, hydrometallurgy, and chemical processing. Meanwhile, a high yield and high degree of depolymerization humic acid product was produced as byproducts. This method could not only effectively avoid high carbon emission and organic resource waste during conventional germanium-rich lignite pyrometallurgical processing, but also could produce humic acid as quality raw materials for metallurgical and agricultural industries, which has advantages of less environmental pollution, high extraction efficiency, and low comprehensive costs.

The invention discloses a multi-response antibacterial multi-layer wound dressing, and belongs to the technical field of medical instruments. The dressing is composed of a pH-responsive antibacterial hydrogel layer, a fluorescence-responsive polyvinyl alcohol (PVA) foam layer, a substrate fixing layer with a visible window and release paper. The visible window is reserved in the substrate fixing layer and used for directly observing the color change of the dressing, and whether a wound is infected or not can be visually judged; the wound dressing prepared by the invention has pH response and fluorescence response, and meanwhile, along with obvious macroscopic color change, the wound infection condition can be monitored on site / in real time; pH-responsive itaconic acid and guanidyl cation-containing antibacterial substances are loaded in the hydrogel layer in a chemical bonding manner and can actively respond to the pH of the wound and promote healing of the wound, and methylene blue (MB) is loaded in the PVA foam layer, so that whether the wound is infected or not can be detected and treated at the same time.

A chemical composition for controlling odor and to a method of using the chemical composition to impart an odor control treatment to an article, more particularly to a textile material or a building or construction material. The chemical composition comprises a metal compound selected from the group consisting of a metal oxide, a metal hydroxide, and a combination thereof and a sulfo polyester. Methods of making and of using are provided.

The present application relates to the technical field of biomedical materials, and discloses a biological activity and biocompatibility surface treatment method for dentures and implants, which comprises the following steps: a) performing surface pretreatment on the base body of the denture or implant; b) applying a composite coating containing hydroxyapatite particles and biocompatible resin adhesive on the surface of the pretreated base body; c) performing low-temperature thermal curing on the composite coating to form a composite coating layer; and d) performing precision polishing on the surface of the cured composite coating layer to selectively remove part of the resin adhesive on the surface. Through mechanical locking of the base body surface and chemical combination of the interface inside the coating, a composite coating layer which is firmly combined with the base body and chemically stable is obtained; meanwhile, through low-temperature curing and surface activation treatment, the hydroxyapatite is exposed on the surface of the coating layer while the biological activity of the hydroxyapatite is retained, so that the coating layer is endowed with effective biological functions.

In one embodiment, the present disclosure is directed to a method for producing a product. For each sample chemical composition of sample chemical compositions, the method inputs into a first model chemoinformatic properties of ingredients of the sample chemical composition, and a value of a property of the sample chemical composition. A new chemical composition is determined via the first model based thereon. The method inputs into a second model, for each sample product of sample products, a value for one or more visual properties of a packaging of the sample product, and one or more characteristics of the new chemical composition. A value is determined for each of the visual properties via the second model. A new product is produced comprising the new chemical composition and packaging comprising the values.

The disclosure relates to a composition, having a liquid continuous phase, a first agrochemical active ingredient in the liquid continuous phase, a capsule containing a second agrochemical active ingredient, the capsule dispersed within the liquid continuous phase and configured to create a physical barrier between the first agrochemical active ingredient and the second agrochemical active ingredient, and a buffer configured to maintain a pH below 9, and where the solubility of the first agrochemical active ingredient in the second agrochemical active ingredient is between 1% and 10% w / w at room temperature. The disclosure further provides methods of making and using such compositions.

The invention relates to the technical field of chemical analysis, and particularly discloses a method and a system for analyzing and calculating the aggregation condition of an analyte in a chemical composition, and the analysis method comprises the following steps: obtaining a chemical image of the analyte in a control sample and a chemical image of the analyte in at least one test sample, carrying out Gaussian blur on each chemical image, and calculating the aggregation condition of the analyte in the chemical composition; carrying out brightness calibration on the obtained Gaussian blurred image; converting the Gaussian blurred image after brightness calibration into a binary image; converting the binary image into a one-dimensional array; counting continuous lengths when predetermined pixels appear in the one-dimensional array and frequencies corresponding to the continuous lengths, and generating a histogram of the frequencies and the continuous lengths; fitting the histogram by using an exponential Gaussian distribution function to obtain an exponential attenuation parameter of the fitted exponential Gaussian distribution function; and calculating the aggregation index of the test sample according to the index attenuation parameters corresponding to the test sample and the control sample. According to the technical scheme, the aggregation condition of the analyte can be quantitatively determined.

The application belongs to the technical field of cutting oil, and specifically provides a kind of composite cutting oil and a preparation method thereof.A kind of composite cutting oil uses coconut oil, mineral oil, poly-alpha olefin as mixed base oil, adds specific amount of rust preventive, polyethylene glycol, nano molybdenum disulfide, antioxidant, dispersant and composite additive obtained by chemical combination of carboxylated multi-walled carbon nanotube surface and thiophosphate amine salt, etc., through the synergistic effect of multiple components, the prepared cutting oil has excellent lubricity, extreme pressure and wear resistance, and is suitable for severe extreme pressure cutting environment.

The invention discloses a dephosphorization material and a preparation method and application thereof, the dephosphorization material comprises: a base material, the base material comprises SiO2, Al2O3, Fe2O3, CaO and MgO; elemental iron; and a plant foaming agent. The large-aperture structures uniformly distributed inside and outside the phosphorus removal material are beneficial to growth and attachment of microorganisms, and generation sites are provided for the removal process of phosphoric acid. The elemental iron contained in the material and phosphate undergo valence change through chemical combination to form hydroxyl and phosphorus flocculation so as to efficiently remove phosphorus pollution. In addition, due to the characteristics of oxidation-reduction capability, low cost, high porosity, difficulty in bonding, large specific surface area, high active iron content and the like of iron, the material has stronger electrochemical enrichment, physical adsorption and oxidation-reduction properties. Therefore, the traditional bottleneck is solved, and excellent efficiency is achieved in a biological filter and an artificial wetland.

The application discloses a kind of based on hydration calcium silicate and polycrystalline fiber composite board and preparation method, belong to inorganic fireproof heat insulation board technical field. Including board body, the board body is by following component weight parts constitutes: calcium source 25-45 parts, silicon source 30-55 parts, polycrystalline fiber 5-25 parts, interface modifier 0.5-3 parts, dispersing agent 0.1-1 part, foam stabilizer 0.1-0.5 parts, water 150-300 parts;The calcium source and silicon source hydrothermal reaction generate hydration calcium silicate crystal, the hydration calcium silicate crystal is mutually interwoven and forms porous matrix skeleton, the polycrystalline fiber disperses in the porous matrix skeleton, the hydration calcium silicate crystal in-situ growth on polycrystalline fiber surface, and forms chemical combination layer with polycrystalline fiber.The based on hydration calcium silicate and polycrystalline fiber composite board and preparation method of the application, the prepared board has excellent fireproof heat insulation performance, while having good mechanical toughness, impact resistance and high temperature long-term stability.

Embodiments herein relate to a method for treating a cancerous tumor in a subject. The method may include applying one or more electric fields at or near a site of a cancerous tumor, wherein the cancerous tumor may comprise a population of cancerous cells. The applied one or more electric fields are effective to delay mitotic division and induce mitotic synchronization within a proportion of cancerous cell populations. The method may include removing the one or more electric fields to allow mitosis within the cancerous cell population. The method may include administering a chemotherapeutic agent to the subject after the one or more electric fields have been removed. Other embodiments are also included herein.

The invention discloses a self-healing interface binder and a preparation method thereof, and belongs to the technical field of binder preparation. The adhesive is prepared from 90 to 110 parts of water, 8 to 12 parts of absolute ethyl alcohol, 50 to 70 parts of cement, 20 to 30 parts of mineral admixture, 15 to 25 parts of polymerized emulsion, 3 to 7 parts of silane coupling agent, 10 to 15 parts of nano silicon dioxide, 5 to 12 parts of unsaturated amide, 8 to 12 parts of unsaturated acid, 4 to 7 parts of biogel, 5 to 8 parts of thixotropic agent, 3 to 6 parts of dispersing agent and 3 to 6 parts of initiator. The mineral admixture comprises silicon powder and rice hull powder in a mass ratio of 3: 7, the polymerized emulsion is vinyl acetate, the silane coupling agent is KH570, the unsaturated amide is acrylamide, and the unsaturated acid is acrylic acid. According to the interface binder prepared by the preparation method disclosed by the invention, through physical permeation and chemical combination, the bonding strength with concrete can be remarkably improved, and the problems of hollowing and cracking are reduced; in addition, a compact protective layer can be formed on the surface of the interface binder, air and moisture are effectively prevented from invading, and the durability of the concrete is improved.

To provide an injection chemical composition that can achieve both curability in water and foaming and curability in non-water environments, even after being exposed to high temperature and high humidity environments. [Solution] An injection solution composition comprising a first agent (A) and a second agent (B), wherein the first agent (A) comprises an aqueous solution of sodium silicate (A-1), an organic polyol (A-2), and a tertiary amine catalyst (A-3), and the second agent (B) comprises an organic polyisocyanate containing a mixture of diphenylmethane diisocyanate and polymethylene polyphenyl polyisocyanate having 3 or more isocyanate functional groups (B-1), or a reaction product (B-1') of an active hydrogen group-containing compound and a mixture (B-1), at least one acid component (B-2) selected from the group consisting of phosphate monoesters and phosphate diesters, and at least one hydrolyzable component (B-3) selected from the group consisting of orthoester compounds and acetal compounds.

The present application relates to sewage treatment moss cleaning technical field, disclose a kind of sedimentation tank moss cleaning method, comprising the following steps: S1, pretreatment moss, by physical and chemical methods, moss is converted into state convenient to remove;S2, spray treatment, at temperature range is 20 ℃ to 30 ℃, using the water containing sodium hypochlorite is sprayed to moss;S3, ultraviolet irradiation, to the first moss obtained ultraviolet irradiation;S4, inhibit the growth of moss, to the second moss is post-processed to inhibit its growth;S5, clean waste, moss residues, cleaning agent and other waste generated in the cleaning process are cleaned in time, avoid the influence of residue on water quality, and prevent moss from growing again again.By physical and chemical combination mode, first, the loose moss in sedimentation tank is effectively removed, then the solution containing sodium hypochlorite is used to spray the moss, to ensure that each moss patch is evenly contacted, to achieve the ideal chemical cleaning effect.

The invention discloses an epoxy resin adhesive with high bio-based content and intrinsic flame retardance and a preparation method, and particularly relates to the technical field of epoxy resin adhesives, and the epoxy resin adhesive is prepared by mixing and curing a component A and a component B according to a mass ratio of 100: 30-100: 45. According to the invention, the flame-retardant property and the bio-based property are deeply combined from the molecular level, so that the product has a stable and lasting flame-retardant effect while the high bio-based ratio is ensured, the traditional cognition that the flame-retardant property is necessarily sacrificed for increasing the bio-based content is thoroughly changed, the synergistic problem of high bio-based property and high flame retardance is broken through, the molecular level performance fusion is realized, and the flame-retardant property of the product is improved. The material is endowed with permanent intrinsic flame retardance, the problems of migration and failure of a small-molecule flame retardant are avoided, stable chemical bonding is formed between flame-retardant components and an adhesive matrix by virtue of an intrinsic flame-retardant mechanism, the problems of migration and precipitation of a traditional additive type flame retardant are completely eradicated, and performance failure and environmental hidden dangers caused by falling of the flame retardant are avoided.

The application discloses a kerosene gel propellant and a preparation method thereof, and belongs to the technical field of propellants. The propellant provided by the application comprises the following components in mass ratio: kerosene 37wt.%-68wt.%, modified boron 30wt.%-60wt.%, and gelling agent 2wt.%-5wt.%. The modified boron is halogen alkyl silane functionalized boron obtained by chemical combination of halogen alkyl silane and boron, and the halogen alkyl silane functionalized boron comprises a -B-O-Si- framework. The stable and controllable coating layer is obtained on the surface of boron particles by modifying the boron through halogen alkyl silane functionalization, and the higher content of boron particles is stabilized in kerosene. In addition, the high active halogen free radicals can be generated in the combustion process, the ignition and combustion of boron are accelerated, and the carbon deposition effect of kerosene hydrocarbons is reduced. The propellant has higher stability, excellent ignition performance and higher combustion efficiency.