368 results about "White powder" patented technology

The invention discloses a method for preparing nano barium titanate based on sol-gel synergistic hydrothermal reaction, which comprises the following steps: (1) dissolving barium acetate in an acetic acid aqueous solution to obtain a barium source solution; weighing tetrabutyl titanate according to the molar ratio of barium to titanium being greater than 1.25, and dissolving the tetrabutyl titanate in alcohol to obtain a titanium source solution; (2) uniformly mixing the barium source solution and the titanium source solution, preserving heat at 20-80 DEG C to obtain gel, drying and grinding to obtain white powder of the barium titanate precursor: (3) preparing a 2-4mol / L inorganic strong alkali aqueous solution, adding the white powder and a dispersing agent into the inorganic strong alkali aqueous solution, and fully stirring to obtain a barium titanate precursor suspension; and (4) transferring the barium titanate precursor suspension into a reaction kettle for hydrothermal reaction, and after the reaction is completed, washing, drying and grinding to obtain the nano barium titanate powder. The preparation method is low in cost, and the prepared nano barium titanate powder is uniform in distribution, spherical or sphere-like in morphology, small in particle size, 80-150nm in average particle size and good in particle crystallinity.

The invention provides an antifouling self-cleaning fluorocarbon finish paint as well as a preparation method and application thereof, and particularly relates to the technical field of special coatings. The antifouling self-cleaning fluorocarbon finish paint is composed of a component A and a component B in a ratio of (80-87): 16, the component A is prepared from the following components in parts by weight: 560 to 580 parts of fluorocarbon resin, 30 to 35 parts of a first solvent, 20 to 40 parts of a second solvent, 180 to 220 parts of titanium dioxide, 90 to 110 parts of filler, 11 to 20 parts of a light stabilizer, 3 to 5 parts of a thickening agent and 13 to 28 parts of an auxiliary agent; the component B comprises the following components in parts by weight: 20-22 parts of fluorocarbon resin, 4-5 parts of a chain extender, 15-20 parts of a diamine curing agent, 15-20 parts of a polyamine curing agent and 25-35 parts of a second solvent. According to the finishing paint, on the basis of enhancing the self-cleaning capability, the weather resistance of a coating is improved, and the aging and damage of the coating are delayed, so that the service life of the coating is prolonged.

The invention provides titanium-containing anhydrous stemming for a blast furnace and a preparation method of the titanium-containing anhydrous stemming, and belongs to the technical field of refractory materials for the blast furnace. The titanium-containing anhydrous stemming for the blast furnace comprises the following raw materials: 40-60 parts of titanium corundum, 5-15 parts of silicon carbide, 10-20 parts of ferro-silicon nitride fine powder, 5-15 parts of titanium dioxide fine powder, 5-15 parts of vanadium-titanium slag fine powder, 5-10 parts of coke fine powder, 1-5 parts of monatomic silicon fine powder, 1-5 parts of ball clay micro powder, 1-5 parts of aluminum nitrate micro powder and 1-2 parts of magnesium alon micro powder. Gas-phase substances of Si (g), Al (g) and Mg (g) can be formed in the stemming at high temperature by the monatomic silicon fine powder and the MgAlON micro powder in the raw materials and react with CO and N2 in the environment to generate ceramic whiskers such as SiC, Si3N4, AlN and MgAl2O4, and the generated ceramic whiskers are distributed in a staggered manner and are filled in pores of the stemming, so that the high-temperature strength and the volume stability of the stemming are remarkably improved.

The invention discloses a nitrogen-doped oxygen-vacancy-rich three-dimensional flower-shaped bismuth oxide electrocatalyst as well as a preparation method and application thereof, relates to the technical field of electrocatalysts, and solves the problems that a traditional bismuth oxide catalyst is insufficient in electron transfer capability and low in active site utilization rate. The preparation method comprises the following steps: dissolving bismuth nitrate, polyvinylpyrrolidone and sodium oleate in a mixed solvent of methanol and N, N-dimethylformamide, and stirring and dissolving to obtain a solution A; the preparation method comprises the following steps: dissolving 1, 3, 5-tri (4-carboxyl phenyl) benzene in a mixed solvent of methanol and N, N-dimethylformamide, and stirring and dissolving to obtain a solution B; and adding the B into the A, uniformly stirring, heating in an oil bath, reacting under magnetic stirring, cooling to room temperature, filtering, washing and drying the product to obtain white powder, calcining in a tubular furnace to obtain three-dimensional flower-shaped Bi2O3, putting in the tubular furnace, introducing argon, introducing ammonia gas, heating, and carrying out heat preservation reaction to obtain the electrocatalyst. The catalyst can be used for catalyzing nitrogen reduction synthesis ammonia reaction.

The invention belongs to the technical field of preparation and application of nano materials, and relates to a preparation method and application of amino-functionalized cerium oxide nano enzyme, and the preparation method comprises the following steps: adding 3-aminophenylboronic acid into a cerous nitrate hexahydrate aqueous solution to obtain a mixed solution; dropwise adding a sodium hydroxide aqueous solution into the mixed solution, carrying out hydrothermal reaction, cooling after the reaction is finished, centrifuging, washing and drying to obtain milk white powder, namely the amino-functionalized cerium oxide nano-enzyme. The boron element is introduced in the preparation of the cerium oxide nano-enzyme, and the amino-functionalized cerium oxide nano-enzyme is prepared by adopting a simple one-step hydrothermal synthesis method, so that the nano-enzyme has good phosphatase-like activity, has high selectivity and sensitivity to LPS, and is short in detection time, high in sensitivity, low in detection limit, simple in preparation process and high in preparation efficiency; the product is good in quality, high in stability, environment-friendly and extremely wide in market prospect.

A preparation method of plant compound essential oil comprises the following steps: preparing mixed powder from dried lemon slices, mint and litsea coreana, carrying out carbon dioxide supercritical extraction, and collecting an extract; the preparation method comprises the following steps: dropwise adding a carboxymethyl-beta-cyclodextrin solution into a mixture of eugenol and thymol, carrying out ultrasonic treatment to obtain an ultrasonic mixed solution, standing, centrifuging, collecting supernate, and drying to obtain a white powdery inclusion compound; and adding lecithin, Tween 80, disodium pyrophosphate and deionized water into the extract, heating and stirring, continuing to add the inclusion compound, homogenizing to obtain a nano-emulsion, adding gelatin and propylene glycol, heating and preserving heat, and cooling to obtain the plant composite essential oil. The compound essential oil disclosed by the invention has antibacterial and antioxidant effects, and has relatively strong antibacterial ability on botrytis cinerea and penicillium germs, and the DPPH free radical scavenging rate is greater than or equal to 90%. According to the invention, the active ingredients of the essential oil are wrapped by carboxymethyl-beta-cyclodextrin and synergistically embedded by lipidosome through a nano-embedding technology to realize slow release, so that the antioxidant and antibacterial properties are effectively prolonged.

The invention provides insulating coating ink, an insulating coating, a preparation method of the insulating coating and a battery, and belongs to the technical field of insulating coatings, and the insulating coating ink comprises a prepolymer, a monomer, toner and a photoinitiator. In the toner, the mass ratio of phthalocyanine blue is 60%-90%, the mass ratio of phthalocyanine green is 0%-30%, and the mass ratio of titanium dioxide is 10%-40%. In the photoinitiators, the mass ratio of the cracking type free radical photoinitiator is 50%-90%, and the mass ratio of the hydrogen abstracting type free radical photoinitiator is 10%-50%; in the cracking type free radical photoinitiator, the mass ratio of the short-medium wave absorption initiator is 40-70%, and the mass ratio of the long-wave absorption initiator is 30-60%. In the insulating coating ink, the mass ratio of the photoinitiator is 1%-5%, and the mass ratio of the toner is 0.2%-1.5%. The insulating coating ink provided by the invention can improve the heat resistance, weather resistance, wear resistance and aging and yellowing resistance of an insulating coating.

The invention discloses a preparation method and application of an S-type heterostructure material with a plasma resonance effect, and the preparation method comprises the following steps: grinding a precursor material, calcining, collecting solid powder, carrying out reflux purification in deionized water, and collecting white powder; dispersing the white powder in a hydrazine hydrate solution, carrying out solvothermal reaction to obtain a faint yellow solution, repeatedly dissolving and precipitating by respectively using acidic and alkaline reagents, washing and drying to obtain a faint yellow solid product; uniformly grinding the faint yellow solid product, calcining the faint yellow solid product in an atmosphere furnace, and cooling to obtain orange solid powder; and adding the orange solid powder into an organic solvent of a precursor containing a tungsten source, and centrifuging, washing and drying after the solvothermal reaction is finished to obtain the S-type heterostructure material with the plasma resonance effect. The S-type heterostructure material with the plasma resonance effect has relatively high efficiency for simulating separation and removal of uranium species in post-treatment wastewater and shows relatively good anti-radiation stability.

The invention provides a protective coating for a fuel storage and transportation cabin and a preparation method thereof, the protective coating comprises a primer layer, and the primer layer comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 20 to 40 parts of phosphorylated-sulfur heterocyclic modified epoxy resin, 0.1 to 1 part of dispersing agent, 0.1 to 1 part of flatting agent, 0.1 to 1 part of defoaming agent, 0 to 10 parts of n-butyl alcohol, 0 to 10 parts of xylene, 10 to 15 parts of zinc phosphate, 0.5 to 1.0 part of thixotropic agent, 10 to 15 parts of flaky filler, 20 to 35 parts of talcum powder, 5 to 10 parts of barite powder and 3 to 10 parts of titanium dioxide; the component B is prepared from the following raw materials in parts by weight: 99 to 100 parts of amino resin and 0.3 to 0.8 part of a catalyst. Phosphorylation-sulfur heterocycle is utilized to modify epoxy resin, a phosphating group (P-O-C) is generated, the lipophobicity is increased, an intrinsic anti-swelling network is constructed based on a sulfur / phosphorus atom covalent bonding epoxy skeleton, and by utilizing the three-dimensional shielding effect of phosphorus atoms and the high-density cross-linking characteristic of thioether bonds, the anti-swelling performance of the epoxy resin is improved. Fuel oil permeation channels are blocked from the molecular level, pollutant dissolution is inhibited, and it is ensured that the coating has good soaking resistance to fuel oil.

The invention belongs to the technical field of brominated flame retardant synthesis, and particularly provides a decabromodiphenyl ethane bromine distillation process chlorination bromine removal process, which comprises the following steps: S1, adding bromine into a reaction kettle, adding a catalyst, and mixing; cooling and dropwise adding molten diphenylethane; then heating, carrying out a heat preservation reaction, and cooling to obtain a brominated crude product; s2, S201, adding the brominated crude product obtained in S1 into a bromine steaming kettle, and heating; s202, chlorine is introduced, and the total amount of bromine and chlorine is detected; carrying out segmented control on the introduced chlorine according to the total amount of bromine and chlorine; s203, when the total amount of bromine and chlorine is reduced to a threshold value, stopping introducing chlorine, standing, cooling, and introducing nitrogen; s3, filtering the feed liquid in the bromine steaming kettle, washing and purifying for three times, and finally, centrifugally dewatering to obtain a faint yellow solid; and S4, adding the faint yellow solid into a high-temperature jet mill, performing high-temperature aging to obtain white powder, and then performing jet milling on the white powder to obtain a finished product. Physical distillation is replaced by chemical replacement, so that bromine is highly separated.

The invention relates to a preparation method and application of a hardness removal agent, and the method comprises the following steps: 1) alkali fusion reaction: mixing and fusing bauxite and NaOH to generate soluble sodium aluminate NaAlO2; 2) compounding silicon and aluminum: dissolving aluminum silicate in hot water, adding silica sol, stirring and mixing, and regulating the pH value to 11-12 by using NaOH; an aluminosilicate precursor gel is formed; 3) hydrothermal crystallization: transferring the aluminosilicate precursor gel into a high-pressure reaction kettle, and carrying out hydrothermal reaction to promote polymerization of a silicon-aluminum network; and 4) post-treatment: cooling aluminosilicate, centrifugally washing the aluminosilicate until the aluminosilicate is neutral, drying the aluminosilicate at 110 DEG C, and grinding the aluminosilicate to obtain a white powder product. A silicon-aluminum network structure of the hardness removal agent prepared by the method has regular pore channels, the highest calcium and magnesium removal rate can reach 90% or above, the hardness removal agent is high in anti-interference performance, is kept stable in a pH range of 6-12, is not influenced by common Cl <-> and SO4 < 2-> in water, and is high in stability.

The invention relates to a preparation method of electrical-grade magnesium oxide for slowing down current leakage, belongs to the technical field of electrical-grade magnesium oxide, and solves the problems of poor insulativity, relatively high electrical leakage and the like in the actual use process of electrical-grade magnesium oxide. Comprising the following steps: step 1, weighing nano calcium oxide and lanthanide series metal oxide, putting the nano calcium oxide and the lanthanide series metal oxide into a quartz crucible, and uniformly mixing to obtain a primary mixed oxide auxiliary agent; 2, heating the mixed oxide auxiliary agent obtained in the step 1 in a muffle furnace, cooling to room temperature under a drying condition to obtain white powder, and grinding to obtain an oxide auxiliary agent; 3, absorbing ethyl acetate (EA), hydrogen-containing silicone oil and polycyclic aromatic hydrocarbon (D30), putting into a centrifugal tube, and uniformly mixing to obtain a liquid film coating auxiliary agent; the method has the advantages that the current leakage of the electrical-grade magnesium oxide with poor insulativity can be slowed down by adding the metal oxide aid under the condition that the original properties of the electrical-grade magnesium oxide are not changed. The method is simple, convenient and obvious in effect.

The invention relates to an ultra-pure calcium fluoride crystal raw material and a preparation method thereof. The preparation method of the hyperpure calcium fluoride CaF2 crystal raw material comprises the following steps: (1) respectively weighing a calcium source and a fluorine source according to the stoichiometric ratio of elements in CaF2, and carrying out vacuum drying to remove adsorbed water and bound water so as to obtain a dehydrated calcium source and a dehydrated fluorine source; (2) mixing the dehydrated calcium source, the dehydrated fluorine source and absolute ethyl alcohol, and carrying out ball milling to obtain a white pasty mixed raw material; and (3) carrying out vacuum high-temperature heat treatment on the white pasty mixed raw material, carrying out solid-phase reaction on calcium ions and fluorine ions to generate calcium fluoride, cooling after the reaction is finished to obtain white powder, and grinding and crushing to obtain the ultra-pure calcium fluoride crystal raw material.

The invention belongs to the technical field of spinning auxiliaries for synthetic fiber processing, and particularly relates to polyethylene fiber FDY spinning oil as well as a preparation method and application thereof. The polyethylene fiber FDY spinning oil comprises a smoothing agent, a wetting agent, an emulsifier, an antistatic agent, a functional additive, deionized water and a wear-resistant agent, wherein the wear-resistant agent is one or more of phenyl dicarbazole phosphate, sulfurized isobutylene and triphenyl phosphate, and the mass percentage content of the wear-resistant agent in the spinning oil agent is not greater than 5%. By adding the wear-resistant agent with appropriate variety and appropriate dosage, not only can the wear resistance of the spinning oil be improved, but also the wettability and stability of the spinning oil can be improved through the synergistic effect of the components. When the spinning oil is used for polyethylene fiber FDY spinning production, the problems of broken ends, white powder and the like in the spinning production process can be obviously improved, and meanwhile it is guaranteed that a polyethylene fiber filament product obtained through FDY processing has excellent quality.

The invention discloses a method for preparing titanium-doped iron phosphate from a titanium dioxide by-product ferrous sulfate, which comprises the following steps: (1) heating and dissolving the titanium dioxide by-product ferrous sulfate in a solvent to form a ferrous sulfate supersaturated solution; (2) adding a precipitant into the ferrous sulfate supersaturated solution for reaction, and cooling to separate out a mixed solid of ferrous sulfate crystals and titanium-containing precipitates after the reaction is finished; (3) taking the saturated ferrous sulfate mother liquor as a solvent, repeating the step (1) and the step (2), and combining the mixed solid obtained by repeating each time and the mixed solid in the step (2) to obtain a total mixed solid; and (4) dissolving the total mixed solid with sulfuric acid to form an iron-titanium solution, sequentially adding phosphoric acid, hydrogen peroxide and phosphorus salt into the iron-titanium solution, mixing, filtering to obtain a titanium-doped iron phosphate precursor, and heating, aging, filtering, washing, drying and calcining the titanium-doped iron phosphate precursor to obtain the titanium-doped iron phosphate product.

The application belongs to the technical field of rubber, and particularly relates to a chloroprene rubber compound, a preparation method and application thereof, and a rubber pad. The chloroprene rubber compound comprises the following components in mass fractions: chloroprene rubber 40-80 parts; cis-butadiene rubber 20-60 parts; flame retardant 50-90 parts; titanium white powder 4-10 parts; reinforcing agent 42-65 parts; anti-aging agent 1-4 parts; silane coupling agent 4-16 parts; plasticizer 4-12 parts; mildew-proof agent 0.5-4 parts; vulcanizing agent 1-3 parts; activator 0.5-3 parts; accelerator 0.2-15 parts; and the flame retardant comprises flame retardant SFR-3B and aluminum hydroxide. The chloroprene rubber compound provided by the application can further improve the thermal stability of the compound on the basis of ensuring the flame retardant property.

The utility model discloses a kind of reaction kettle with self-cleaning effect for carving white powder processing, including outer kettle body, the inside of outer kettle body is equipped with inner kettle body, two fixed rings are fixed between outer kettle body and inner kettle body, rotatingly connected with rotating rod in the inside of inner kettle body, the outside wall of rotating rod is fixed with multiple stirring rods, the inside sliding connection of stirring rod has moving rod, the end of moving rod away from stirring rod is fixed with fixed plate, after reaction kettle is used, start hydraulic rod, hydraulic rod pushes circular ring and rotating ring to move, rotating ring extrudes movable rod, movable rod pushes fixed frame and fixed rod to move, fixed rod moves with moving rod, fixed plate and brush silk, brush silk and inner kettle body contact, start motor, make brush silk clean inner kettle body, clean, hydraulic rod retracts, in this way, brush silk and inner kettle body separate, reduce the contact of brush silk and inner kettle body, reduce the wear degree of brush silk, prolong service life.

The invention relates to (Z)-5-hydroxy-3-methyl-pent-2-enamide and application thereof, in particular to a novel compound (Z)-5-hydroxy-3-methyl-pent-2-enamide extracted and separated from secondary metabolites of Fusarium acuminatum, the novel compound (Z)-5-hydroxy-3-methyl-pent-2-enamide is white powder, the molecular formula of the novel compound (Z)-5-hydroxy-3-methyl-pent-2-enamide is C6H11NO2, and a quasi-molecular ion peak given by a high-resolution mass spectrum is [2M + Na-CO] + 253.1543; the invention relates to an application of (Z)-5-hydroxy-3-methyl-pent-2-enamide in preparation of a medicine for reducing blood sugar, in particular to an application of (Z)-5-hydroxy-3-methyl-pent-2-enamide.

The invention discloses an up-conversion luminescence modified BiOBr-based composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: preparing a raw material A into an aqueous solution to obtain a turbid liquid; adding a polymer additive into the turbid liquid to obtain a precursor solution; putting the precursor solution into a hydrothermal reaction kettle for hydrothermal reaction to obtain white powder; centrifuging the white powder, washing and drying to obtain upconversion particles; fully and uniformly mixing the raw material B with up-conversion particles and ethylene glycol to obtain a turbid liquid; adding a polymer additive into the turbid liquid, fully and uniformly mixing to obtain a precursor solution, putting the precursor solution into a solvothermal reaction kettle to obtain powder, and centrifuging, washing and drying the powder to obtain the composite photocatalyst. The photocatalyst disclosed by the invention has a certain absorption effect on ultraviolet-visible-infrared band sunlight, so that the utilization efficiency of the photocatalyst on the sunlight is improved; the specific surface area is large, the adsorption capacity on pollutants is high, and degradation on the pollutants is facilitated.

The invention is suitable for the technical field of materials, and discloses silica gel and a preparation method thereof, and a silica gel product and a preparation method thereof. Wherein the silica gel comprises a first component and a second component, the first component comprises a base material, a reinforcing agent, a modified filler, titanium dioxide and a vulcanizing agent, and the second component comprises a base material, a reinforcing agent, a modified filler, titanium dioxide, a cross-linking agent and a polymerization inhibitor. The silica gel provided by the invention not only has better mechanical properties, but also has a small friction coefficient, when the silica gel is in contact with skin, the adhesion feeling is low, the smooth effect is good, and the smooth feeling and the skin-friendly property are improved. Moreover, two components, namely the first component and the second component, are arranged, the first component and the second component are stored separately, the material is easy to store and stable in performance, the service life of the product can be prolonged, in addition, the material preparation and forming process is simple, the vulcanization time is short, and the production efficiency is greatly improved.

The application discloses a preparation method of titanium white powder for chemical fibers, and comprises the following steps: S1, preparing a titanium dioxide base material slurry: taking titanium white base material, adding an organic dispersing agent, and preparing a titanium dioxide base material slurry; S2, coating: taking the titanium dioxide base material slurry, and sequentially performing zirconium silicate coating and trihydroxy aluminum stone coating; S3, steam powdering: taking the coated material, adding a titanate additive for steam powdering, and obtaining titanium white powder. The application improves the compatibility with spinning raw materials by using an organic dispersing agent in the coating and slurry preparation process, and then improves the weather resistance of the titanium white powder by zirconium silicate coating, and further improves the water dispersibility of the titanium white powder by the condensation of trihydroxy aluminum stone coating and the titanate additive, so that the extinction effect and weather resistance of the chemical fibers are improved.

The application relates to a Micro LED panel packaging structure and packaging glue, which comprises a light-emitting chip, a sapphire packaging layer and a glue layer, the sapphire packaging layer is coated on the light-emitting chip, the glue layer is coated on the sapphire packaging layer, diffusion powder is arranged at the contact surface of the glue layer and the sapphire packaging layer, the diffusion powder comprises milky white powder with a foggy surface and transparent powder with a smooth surface. The application uses compounded diffusion powder, which can comprehensively improve the brightness and light scattering effect. When light is emitted and meets the diffusion powder, reflection occurs, the light is scattered, the problem of inconsistent light caused by phase separation is improved, the refractive index of the diffusion powder is larger than that of the base glue, the diffusion powder is arranged at the contact surface of the glue layer and the sapphire packaging layer, part of the diffusion powder is in contact with the sapphire packaging layer, the total reflection angle of light at the contact surface of the diffusion powder and the sapphire packaging layer is larger than that at the contact surface of the base glue and the sapphire packaging layer, more light can be refracted and emitted, and the brightness is improved.

The invention relates to a mesoporous silica microsphere with room temperature phosphorescence emission and a preparation method thereof, and the preparation method comprises the following steps: adding TEA into 25 mL of deionized water to obtain a transparent solution; adding CTAB (Cetyltrimethyl Ammonium Bromide) and glucose into the obtained transparent solution, and stirring for 1 hour at 60 DEG C; adding TEOS (tetraethyl orthosilicate) and sodium salicylate into the mixed solution, continuously stirring for two hours, centrifuging, and drying to obtain white powder. And calcining the obtained white powder in a crucible with a cover to obtain the mesoporous silica microspheres with room-temperature phosphorescence emission. The mesoporous silica microsphere is characterized in that the mesoporous silica microsphere is obtained by an in-situ synthesis method. In addition, the synthesized mesoporous silica microspheres with room-temperature phosphorescence emission have bright cyan phosphorescence after being excited by ultraviolet light, the average phosphorescence lifetime is 0.94 s, and the duration of macroscopic phosphorescence is 10 s after an ultraviolet lamp is turned off. The medicines used for preparation are cheap and easy to obtain, the preparation process is simple and convenient, and complicated and tedious post-treatment steps are not needed. The prepared mesoporous silica microspheres with room-temperature phosphorescence emission can be successfully applied to the fields of information encryption and the like.

The invention relates to the technical field of coatings, and discloses a heat insulation coating for a heat exchanger and a preparation process thereof.The preparation process comprises the following steps that epoxy resin and modified cardanol are added into xylene, stirring is conducted for 10-15 min at the speed of 600-800 r / min, stirring is kept, a dispersing agent, a defoaming agent, modified graphene and titanium dioxide are sequentially added into the xylene, high-speed dispersion is conducted for 20-30 min, then the rotating speed is reduced to 300-500 r / min, stirring is conducted for 20-30 min, and the heat insulation coating for the heat exchanger is obtained. Adding hollow glass beads into the mixture, stirring at a low speed for 8-10 minutes, finally adding a curing agent, continuously stirring for 5-8 minutes, filtering, and standing to obtain the heat insulation coating for the heat exchanger. The prepared heat insulation coating for the heat exchanger has good heat insulation, water resistance and salt spray resistance.

The present application provides a low odor / low whitening structure instant adhesive and a preparation method thereof. The low odor / low whitening structure instant adhesive comprises 70-90 wt% of cyano acrylate, 3-20 wt% of acrylic acid copolymer, 1-13 wt% of fumed silica, 0.2-2 wt% of plasticizer, 0.1-1 wt% of carbon black and 0-0.05 wt% of additive in terms of mass fraction. The present application selects ultra-high purity monomers in the environment of low polymerization inhibitor, which can significantly shorten the polymerization induction period, so that the monomer can be instantaneously initiated and completely cured after contacting the surface of the substrate, thereby minimizing the release of volatile monomers into the environment, further reducing the gaseous monomer that causes respiratory tract / mucosa irritation from the source, and inhibiting the polymerization of volatile monomers in the air to form white powder.

The invention discloses a production method of a PA / PE high-barrier composite film bag. The composite film bag comprises an outer layer, a middle layer and an inner layer, the outer layer is prepared from PA6, glass fibers, maleic anhydride grafted polyethylene, an antioxidant, a slipping agent, an ultraviolet light absorber, titanium dioxide, nano silicon dioxide and polyimide; the middle layer is prepared from EVOH (Ethylene Vinyl Alcohol), polyamide-imide, nano montmorillonite, maleic anhydride grafted polypropylene, an antioxidant, a slipping agent, terpene resin, polyvinylidene chloride and polybutylene terephthalate; the inner layer is prepared from HDPE, LLDPE, mPE, an antistatic agent, silicon dioxide, dioctyl phthalate, an antibacterial agent and polylactic acid. The composite film bag prepared by the invention not only has high barrier property and good strength, but also has various functions.

The invention relates to the technical field of chiral resolution, in particular to a solvent activated cyclodextrin membrane for chiral separation and a preparation method and application thereof.The preparation method comprises the steps that beta-CD and CDI are mixed in DMSO and stirred at the room temperature in inert gas, then excessive EDA is added, continuous stirring is conducted, and a mixed solution is obtained; performing vacuum concentration, washing, precipitating, filtering, repeating for multiple times, and drying to obtain a white powdery compound; activating through an organic solvent, washing and drying to obtain solvent activated cyclodextrin; the method comprises the following steps: dissolving cyclodextrin in deionized water to obtain a water-phase solution, and preparing the solvent-activated cyclodextrin membrane by taking an n-hexane solution of trimesoyl chloride as an organic-phase solution through a free interface polymerization method. Compared with the prior art, the cyclodextrin membrane prepared by the invention has a good separation effect on various amino acids, overcomes the problem of single resolution object of a chiral membrane in the prior art, and has important significance on design and preparation of a chiral separation membrane.

The application provides a preparation method of a copper-clad plate, the copper-clad plate and an LED lamp plate. The preparation method of the copper-clad plate comprises the following steps: mixing epoxy resin and titanium white powder to obtain a mixed glue solution; immersing a glass fiber cloth in the mixed glue solution, and then heating to form a semi-cured film; and pressing a copper foil layer and the semi-cured film to form the copper-clad plate. Since the titanium white powder is added to the epoxy resin, the titanium white powder is uniformly mixed with the epoxy resin as an inorganic filler in the mixed glue solution obtained by mixing the epoxy resin and the titanium white powder. When the mixed glue solution is solidified, the titanium white powder can fill the pores of the epoxy resin, thereby improving the hardness and stability of the epoxy resin. Meanwhile, the titanium white powder can make the semi-cured film form a white base film. The white base film has high stability and has a strong reflection effect on light, thereby avoiding yellowing of the copper-clad plate in a high-temperature or light environment.

The invention discloses an efficient deionizing neutralizer for strongly acidic pickling wastewater and a preparation method of the efficient deionizing neutralizer, and belongs to the technical field of industrial wastewater treatment. The neutralizer is prepared by carrying out pure physical crushing, grinding, screening and compounding on magnesium silicate minerals, aluminum clay minerals and siliceous inert minerals, is white powder, has the density of 1.15-1.25 g / cm < 3 >, is not dissolved, not hydrolyzed and not reacted with water in pure water, is only subjected to directional proton consumption reaction with H under the strongly acidic condition with the pH value of 0-3, and can be used for preparing a high-purity high-purity high-purity magnesium oxide. After the pH value of the wastewater is rapidly increased to 4-5, the device is automatically stopped. The whole process of the preparation method is physical processing, high-temperature calcination is avoided, and chemical modification is avoided. The method provided by the invention solves the problems of scaling, large sludge amount and difficult pH control of the traditional neutralizer, has the advantages of greenness, environmental protection, safety, easy operation and low cost, and is suitable for strong acid pickling wastewater treatment in steel, electroplating and metal processing industries.

To provide a wireless tag with a temperature sensor function capable of suppressing a temperature rise of at least an inclusion part of a temperature sensor even when installed in a sunny place irradiated with sunlight.SOLUTION: A wireless tag 10 includes a semiconductor element 12 provided with a temperature sensor, an antenna 14 that receives a wireless instruction from a reader outside the wireless tag 10 or transmits a wireless signal to the reader, the semiconductor element 12 that wirelessly transmits temperature data measured by the temperature sensor from the antenna 14 to the reader according to the wireless instruction from the reader received by the antenna 14, and a conductive pattern 16 that electrically connects the semiconductor element 12 and the antenna 14. The outer peripheral surface of the inclusion part of the temperature sensors is covered with white resins containing white powder 24p so that the temperature rise of at least the inclusion part of the temperature sensors can be suppressed by reflecting sunlight when the wireless tag 10 is irradiated with the sunlight.SELECTED DRAWING: Figure 1