196results about How to "Good pollution resistance" patented technology

A flow measurement device is disclosed, in which an accumulation of pollution substance onto a detection element is prevented, and which can measure a reverse flow similarly to a normal flow. On both ends of an outer wall 23 outer peripheral portion of a divided flow pipe 20 having a OMEGA-shape pipe passage, there are oppositely formed an inlet port 25 and an outlet port 26, which open in faces orthogonal to a flow direction of a main flow M that is a detection object. Within the divided flow pipe 20, by a curved partition 27, plural branch flow passages 28a, 28b mutually branching and joining in the divided flow pipe 20 are formed. Inside both end portions of the outer wall 23, undulation portions 32, 33 are formed so as to clog an inlet and an outlet of the outer peripheral side branch flow passage 28a and, by this, throttles are formed respectively in a flow passage between the inlet port 25 and the inlet of the branch flow passage 28a and a flow passage between the outlet port 26 and the outlet of the branch flow passage 28a. In a bottom portion of the outer wall 23 of the divided flow pipe 20, a detection element 31 is attached so as to be exposed to a flow in the outer peripheral side branch flow passage 28a and, against its detection face, a down flow DW further divided from a divided flow D obliquely impinges.

The invention discloses a pollution-resistant polyamide composite membrane which comprises a nonwoven fabric layer, a porous support layer, a polyamide layer and a pollution-resistant layer which are stacked sequentially, wherein the pollution-resistant layer comprises a polymer compounding inorganic nano particles; the inorganic nano particles are modified or unmodified inorganic nano particles, and preferably are at least one kind of the nano particles of silver, silver compound, modified silver, modified silver compound, copper, copper compound, modified copper, modified copper compound, zinc, zinc compound, modified zinc, modified zinc compound, titanium, titanium compound, modified titanium and modified titanium compound. The invention also provides a preparation method of the pollution-resistant polyamide composite membrane and an application of the pollution-resistant polyamide composite membrane in the field of liquid separation.

The invention discloses a method for preparing a pollution-resistant low-pressure reverse osmosis membrane and belongs to the technical field of the separation of reverse osmosis membranes for water treatment. The method comprises the following steps of: preparing a polyamide membrane on a polysulfone porous membrane by using an aqueous solution of polyamine and an organic solution of polyacyl chloride through interfacial polycondensation, and coating and cross-linking a layer of polyvinyl alcohol-grafted zwitterionic copolymer membrane on the surface of the polyamide membrane. The method for preparing the pollution-resistant low-pressure reverse osmosis membrane is reasonably designed; a polyvinyl alcohol-grafted zwitterionic copolymer is coated and cross-linked on the polyamide membrane which is prepared on the polysulfone porous membrane by using the aqueous solution of polyamine and the organic solution of polyacyl chloride through interfacial polycondensation, so that the hydrophilcity of the surface of the membrane is improved, and the adhesiveness of organic matter is reduced; and the reverse osmosis membrane has good pollution resistance during long-time running. The membrane has high backwashing resistance and stability; and the salt rejection rate of the membrane on a NaCl aqueous solution at the concentration of 3.5g.L<-1> can reach over 97.0 percent at the temperature of 25 DEG C and under the pressure of 1.5MPa.

The invention discloses a high permeability nanofiltration membrane containing zwitterion and a preparation method. The nanofiltration membrane is composed of a polysulfones supporting layer and a functional layer containing a terpolymer of zwitterion group; the preparation process comprises the following steps: acquiring the water-soluble terpolymer through free radical copolymerization reactioncontaining zwitterion, preparing the copolymer and a cross-linking agent to an aqueous solution with a certain concentration, dipping one layer of the aqueous solution on the surface of the polysulfones supporting layer, then solidifying to obtain the membrane. The water flux of the nanofiltration membrane containing zwitterion is 30-45L.m-2.h-1 under the operation pressure of 0.6 MPa, and the nanofiltration membrane has high retention rate to bivalent ions with the highest of 97.5%, the retention rate to the monovalent cation is lower than 60%. The prepared nanofiltration membrane containingzwitterion has high permeability and stain resistane, the method for preparing the membrane is simple and easy which has low cost, and has good industrialization application prospect.

A aqueous resin composition is used in the invention which is obtained by emulsion polymerization using a polymerizable unsaturated monomer (b) in the presence of an aqueous resin dispersion (A) comprising an acid-modified polyolefin (a), an ether-based solvent and a basic substance. Also, an aqueous coating composition comprising an aqueous resin dispersion (B) obtained by emulsion polymerization of a polymerizable unsaturated monomer (b) in the presence of an aqueous resin dispersion (A) containing an acid-modified polyolefin (a), an ether-based solvent and a basic substance, with resin beads (C), wherein the content of resin beads (C) is 1-30 parts by mass with respect to 100 parts by mass of the total resin solid content of the coating material. The composition has excellent adhesion for plastic bases and allows formation of coated films with excellent water resistance, stain resistance, damage resistance and solvent resistance.

The invention relates to a preparation method of a pollution-resistant low-pressure nanofiltration membrane, belonging to the technical field of water treatment nanofiltration membrane separation. The preparation method comprises the steps of: grafting a zwitter-ion copolymer and polyamine and poly acyl chloride monomers through polyvinyl alcohol for interface polymerization; and forming a composite nanofiltration membrane of a polyamide functional layer containing zwitter-ion groups on a polyacrylonitrile porous support membrane. By adopting an interface polymerization membrane, the pollution-resistant low-pressure nanofiltration membrane is introduced into a polyimide nanofiltration membrane in situ, and the characteristics of zwitter-ion hydrophilcity and pollution resistance are effectively combined with the characteristics of convenience and rapidness for making the membrane through interface polymerization with polyimide. The pollution-resistant low-pressure nanofiltration membrane has excellent performance, simple preparation process, lower production cost and excellent industrial applicability.

The invention relates to a solar cell encapsulating EVA (ethylene vinyl acetate copolymer) adhesive film with high light transmittance. The solar cell encapsulating EVA adhesive film is characterized in that the thickness of the EVA adhesive film is 0.8 mm-1.1 mm, and the EVA adhesive film is prepared from raw materials in parts by weight as follows: 100 parts of EVA resin, 0.5-2.5 parts of a plasticizer, 0.1-0.3 parts of a photoelectric conversion rate enhancer, 1-4 parts of an anti-aging agent, 1.5-2.5 parts of a blocking agent, 1-2 parts of a dispersing agent, 1-3 parts of a coupling agent and 1-3 parts of a cross-linking agent. Firstly, the raw materials are added to a mixer proportionally and mixed into uniform components, the components are subjected to melt mixing by a banbury mixer and then subjected to extrusion and pelletizing, and the EVA adhesive film is obtained. According to the prepared EVA adhesive film, the light transmittance of the adhesive film is not influenced and the mechanical properties are greatly improved while properties and photoelectric conversion efficiency of the adhesive film are improved with addition of multiple additives.

The invention discloses a preparation method of a lasting hydrophilization modified polyvinylidene fluoride (PVDF) ultrafiltration membrane. The preparation method of the lasting hydrophilization modified PVDF ultrafiltration membrane comprises the following steps: 1) preparing a film casting solution; 2) preparing a crosslinked blend membrane. After liquid phase blending modification is carried out on PVDF and an organic hydrophilic macromolecule PVA (polyvinyl alcohol), further anhydrous ferric chloride is added into the film casting solution, and PVA is fixed through a complexing reaction carried out on a hydroxyl on a molecular chain of the PVA and Fe<3+>, so that lasting hydrophilic modification of a membrane is realized, and water permeability stability is improved while a membrane structure is optimized; after modification, performances of the membrane are shown as follows: a contact angle is reduced by 30-40 degrees, flux is increased by 1-3 times compared with the flux before modification, and strength is increased by 1-1.5MPa; the anti-pollution capacity of the membrane is shown as follows: after filtering is carried out for 2 hours, the recovery rate of the flux of the membrane is increased by 10-20%, and the attenuation rate of the flux of the membrane is reduced by 5-10%.

The invention provides a preparation method for antiskid and anti-wear easily-cleaned ceramic tiles, and relates to the technical field of building ceramics. The antiskid and anti-wear easily-cleaned ceramic tiles are prepared from the following successive steps: preparing a green body layer by pressing, spreading an overglaze layer, preparing a decoration layer by ink jet printing, printing an antiskid and anti-wear layer, preparing an easily-cleaned dry layers, conducting burning, conducting burnishing and polishing edges. Technical problems commonly existing in ceramic archaized tiles in present markets that surface anti-wear strength is not enough, wearing is easy, the antiskid factor is low, cleaning is difficult, dirt hiding is easy and the like are relieved, and technical effects that the prepared antiskid and anti-wear easily-cleaned ceramic tiles have high anti-wear strength, uneasiness to wear and a high antiskid factor, people are effectively prevented from falling, the security of the tiles is improved, meanwhile, the contamination resistance is excellent, dirt is not easy to hide, cleaning is easy, and convenience is provided for daily cleaning are achieved.

This invention relates to insulator technique field and to one insulator of +-800kV with direct current, wherein, the umbrella cover uses 110-2-methyl-vinyl ketone as base and adds strengthening agent gas phase white carbon and aluminum hydroxide powder and proper assistant agent and sulfuration agent for mixing; using total injection process to make the silicon glue under high pressure into umbrella cover on the mill surface with continuous distribution with ball heads and ball socket structure ware into one integrated insulator.

The invention discloses a preparation method of modified composite ultrafine talcum powder, which comprises the following steps: (1) breaking raw material, and grinding the broken material to fine powder; (2) adding water and grinding-assistant medicine into the ground material to be configured into pulp with the concentration of 50 to 70 percent and to be uniformly mixed; (3) configuring composite modifier, silane coupling agent and sodium stearate to surface modification solution to be poured into the pulped material so as to modify the material; (4) carrying out the wet-method ultra-fine grinding on the modified material, and requiring the particles with the granularity being less than 2 micrometers for the mineral pulp ultra-fine grinding to be more than 95 percent; (5) forcibly drying and collecting the material after being ultra-fine ground. By utilizing the wet-method ultra-fine grinding and mightiness drying process, the prepared modified composite ultra-fine talcum powder has smaller granularity than that of ordinary talcum powder and wider distribution, resists the insolation and high temperature, has good water resistance, resists pollution, and has strong anti-aging performance.

The invention provides water-borne polyurethane sponge strip coating and a preparation method and application thereof. The water-borne polyurethane sponge strip coating comprises the following components in parts by weight: 40-50 parts of modified water-borne polyurethane dispersion, 1-8 parts of a slip agent, 10-20 parts of wax powder, 1-3.5 parts of silicon emulsion, 1-6 parts of a brightening agent, 0.2-2.5 parts of a wetting agent, 3-7 parts of curing agent, 0.1-2 parts of dispersant, and 0.5-3 parts of plasticizer. The coating provided by the invention can be used on the surfaces of automobile door window sealing strips with EPDM (ethylene propylene diene monomer) and PVC (polyvinyl chloride) as base materials, achieving the effects of slippage increase, esthetic appearance, wear resistance and staining resistance. The product has excellent adhesiveness to the base materials, and the coating has excellent water resistance, weather resistance, washing resistance, creasing resistance and fouling resistance.

The present invention relates to the field of materials, and discloses an artificial stone material and a preparation method and use thereof, and the artificial stone material comprises the following components by weight: 20 to 60 parts of resin, 10 to 30 parts of a filling material and 6 to 10 parts of hollow glass beads. The hollow glass beads as a lightweight filler are added into the artificial stone formula, on the one hand, the density of the artificial stone formula is reduced, so that the artificial stone material is lighter in weight, on the other hand, due to good interface compatibility of the hollow glass beads and the resin and other filler relative to other lightweight materials, the artificial stone material is higher in strength retention rate, the artificial stone material is easier to polish, a product prepared from the artificial stone material has contamination-resistant surface appearance with good chemical resistance, a surface coating or gel coat is not needed, and artificial stone products are easy to design.

The invention discloses a preparation method of an amphoteric polyelectrolyte complex surface-modified polyamide reverse osmosis membrane. The preparation method comprises the steps: firstly, preparing an amphoteric cationic polymer by a free radical polymerization method, then preparing an amphoteric polyelectrolyte complex by an ionic crosslinking method, dispersing the amphoteric polyelectrolyte complex in an aqueous phase solution, and thus obtaining the amphoteric polyelectrolyte complex surface-modified polyamide reverse osmosis membrane through surface secondary interface polymerization. With utilization of good hydrophilicity, contamination resistance and a unique nanoparticle structure of the amphoteric polyelectrolyte complex, the water permeation flux and contamination resistance of the membrane are improved while the high interception rate of the polyamide membrane on an inorganic salt is kept. Under an operating pressure of 1.5 MPa at the temperature of 25 DEG C, the interception rate of the reverse osmosis membrane on NaCl is more than 98%, the water flux is greater than 30 L.m<-2>.h<-1>. Therefore, the prepared amphoteric polyelectrolyte complex surface-modified polyamide reverse osmosis membrane has high desalination rate, water permeability and contamination resistance.

The invention relates to the field of water treatment and discloses a composite reverse osmosis membrane as well as a preparation method and application thereof. The composite reverse osmosis membrane comprises a supporting layer, a separation layer and a hydrophilic and pollution-resisting layer, which are stacked in sequence, wherein the separation layer is a layer formed by cross-linked polyamide; and the hydrophilic and pollution-resisting layer is a layer formed by carrying out a crosslinking reaction on a polymer containing hydroxyl and a silane coupling agent containing zwitterions. The reverse osmosis membrane provided by the invention not only has relatively high water flux and desalting rate, but also has relatively strong pollution-resisting performance; and the preparation method of the reverse osmosis membrane is simple and has an extremely good industrial application prospect.

A surface-treated hot-dipped steel material comprises a steel material and a coating material formed on the surface of the steel material, wherein the coating material comprises a plating layer and a coating film formed on the surface of the plating layer and comprising an organic resin in this order when observed from the steel material side, the plating layer contains Al, Zn, Si and Mg as constituent elements, the Al content and the Mg content in the plating layer are 25 to 75 mass% and 0.1 to 10 mass%, respectively, the plating layer contains 0.2 to 15 vol% of an Si-Mg phase, the ratio of the content of Mg in the Si-Mg phase to the total content of Mg in the plating layer is 3 to 100% inclusive by mass, and the organic resin is crosslinked with at least one component selected from a silane coupling agent, a crosslinkable zirconium compound, a crosslinkable titanium compound, an epoxy compound and an amino resin.

In general, a process manufacturing for polyvinylidene fluoride-based separation membrane and a membrane manufactured using same employ a non-solvent induced phase separation method and a thermally induced phase separation method. However, the hydrophilic polyvinylidene fluoride-based hollow-fiber separation membrane according to the present invention is manufactured using a spinning solution that contains a predetermined hydrophilic polymer and a poor solvent for excellent mechanical strength, and has small pores, a high permeation flow rate, and high membrane contamination resistance. Also, when a separation membrane for water treatment is manufactured, predetermined post-processing processes for providing porosity and hydrophilicity are eliminated, such that the separation membrane may be manufactured economically and efficiently.

The invention discloses a waterborne environment-friendly silicone-acrylic real stone exterior wall coating. The coating comprises the following components in percentage by mass: 30-40% of silicone-acrylic emulsion, 2-5% of texanol ester alcohol film forming aid, 2-6% of natural rock slices, 50-55% of quartz powder, 0.1-0.5% of thickener, 1-5% of anti-freezing agent, 0.1-0.3% of dispersant, 0.1-0.3% of defoaming agent and 0.1-0.3% of preservative. The coating is natural, environment-friendly and non-fading and has the advantages of extremely good acid and alkali resistance, water resistance and pollution resistance, strong third dimension, good texture, good decoration effect and the like, a coating film is tough and extremely strong in adhesive force, the defects that a traditional real stone coating is easy to whiten when being scoured by water and easy to yellow under the irradiation of sunlight is overcome, the rock grain effect of natural granite is imitated, the texture of the granite is vividly revealed, the original appearance of the granite is restored, and the exterior wall coating has rich texture similar to stone, and brings solemn and gorgeous visual enjoyment like the granite.

The invention relates to a water-based woodware adhesive force-enhanced single-component matt modulation light-colored finishing coat, which is characterized by being prepared from the following composition materials: water-base resin, a coalescing agent, an other auxiliary agent, titanium white pulp, mill base and water. A preparation method of the water-based woodware adhesive force-enhanced single-component matt modulation light-colored finishing coat is characterized by comprising the following steps: sufficiently and evenly dispersing the water-base resin, the coalescing agent, the other auxiliary agent, the titanium white pulp, the mill base and the water, and packaging to form a finished product. The water-based woodware adhesive force-enhanced single-component matt modulation light-colored finishing coat has the advantages of good adhesive force on various primer base materials, good color stability after colour modulation, good water resistance and stain resistance, excellent coating effect, environment friendliness, safety, and simpleness and safety in use, and can be widely applied to coating of factory furniture.

The invention relates to primer-topcoat paint for automobile parts. The primer-topcoat paint consists of a main coating agent component A and a curing agent component B, wherein the main coating agent component consists of base resin, a pigment filler, a solvent and an aid; the base resin consists of epoxy resin 634-80 and epoxy resin 601-75 in the weight ratio of 20-35:10-19; and the base resin accounts for 30 to 54 percent of the weight of the main coating agent. The primer-topcoat paint has high adhesion, high mechanical strength, high corrosion resistance, high medicament resistance, highacid rain resistance, high pollution resistance and high moisture resistance. A coating is free from foaming, color change and distortion under a high-temperature and high-humidity climate condition,has high construction performance and high production line overcoatability.

The invention provides an ultraviolet-curing matte paint, comprising the following raw materials in parts by weight: 15-40 parts of vinyl-containing silicone resin, 10-15 parts of high-functionality acrylate monomer, 3-10 parts of silica matte powder, 30-60 parts of diluent and 1-6 parts of photoinitiator, wherein the silica matte powder is surface-grafted modified silica powder. The ultraviolet-curing matte paint provided by the invention synergistically plays the optimal effect of the fouling-resistant, slippery and elastic paint film by coordinating the dosage of the vinyl-containing silicone resin and the surface-grafted modified spherical silica matte powder.

The invention discloses a glaze for achieving a silk glazed surface effect on a tile surface, a preparation method and the tile. The glaze is prepared from the following raw material components by weight: mineral material, limestone, 1-2 parts of dolomite, wollastonite, barium carbonate, calcined talcum powder, feldspar, nepheline, magnesium oxide, barium oxide, aluminum oxide, silicon dioxide anda solvent. The preparation method of the glaze comprises the following steps: adding the raw materials into a mixer according to the number of parts, adding water with the mass of 0.3 to 0.6 time ofthe total mass of the raw materials, mixing and grinding, until the fineness of glaze slip is 600 to 900 meshes, thus obtaining the glaze. The glaze prepared by the method has a soft, fine and smoothhand feeling and has good wear resistance, and the tile surface can have the silk glazed surface effect after the glaze is applied to the tile.