87results about How to "Microporous reduction" patented technology

Ultraporous sol gel monoliths and methods for preparing the same are provided, having superior flow characteristics for chromatography and analytical chemistry applications. The methods for forming an ultra porous sol-gel monolith include (a) forming a solution comprising a porogen, a matrix dissolving catalyst and a sol gel precursor; (b) allowing the solution to form a gel; and (c) drying the gel at an elevated temperature. The ultraporous sol gel monoliths are characterized by a porosity of up to about 97%, a BET surface area of at least about 50 m²/g and substantially no micropores.

The invention belongs to the technical field of general medical and sanitary products, and particularly relates to a novel condom based on a graphene modification technology and a production method thereof. The novel condom is added with graphene oxide and functionalized graphene by 0.1-25%. The graphene oxide or the chemically-modified functionalized graphene is dispersed into a condom material with natural latex as a base material through an aqueous phase or an emulsion according to demand, thereby producing the condom according to processes in the prior art. The condom holds a high toughness even if the minimum thickness reaches 15 [mu]m, so that use requirement of the condom is satisfied. The condom is increased by 15-40% in strength when compared with original natural latex materials. Because that the graphene is low in breathability and has material composition effects, the condom is less in micro-pores so that virus penetrating probability is greatly reduced. The heat conductivity coefficient of the composite material is increased by 10-20 and the condom is improved in body feel.

The present invention discloses one kind of heat resistant anticorrosive composite polyphenylene sulfide epoxy paint and its preparation process. The anticorrosive paint consists of primer, finishing paint and intercoat paint. The primer consists of polyphenylene sulfide, epoxy resin, glass scale and cyanamide dimmer. The finishing paint consists of polyphenylene sulfide, epoxy resin, silicon carbide, 4, 4'-diamino diphenyl sulphone and cyanamide dimmer. The intercoat paint consists of polyphenylene sulfide, epoxy resin, silicon carbide, glass scale, dihydrazide sebacate and 4, 4'-diamino diphenyl sulphone. The anticorrosive paint produces no sag, and can form homogeneous and smooth coating with excellent physical and chemical performance, high heat resistance, high corrosion resistance, high impact strength, and high insulating performance.

A hypoeutectic aluminum silicon casting alloy having a refined primary silicon particle size and a modified iron morphology. The alloy includes 10 to 11.5% by weight silicon, 0.10 to 0.70% by weight magnesium and also contains 0.05 to 0.07% by weight strontium. On cooling from the solution temperature, the strontium serves to modify the silicon eutectic structure as well as create an iron phase morphology change. Such changes facilitate feeding through the aluminum interdendritic matrix. This, in turn, creates a finished die cast product with extremely low levels of microporosity defects. The alloy may be used to cast engine blocks for marine outboard and stern drive motors. Furthermore, when the magnesium levels are adjusted to approximately 0.10 to 0.20% by weight magnesium, propellers having a highly advantageous ductility may be obtained.

The invention relates to a cultivation method of pleurotus geesteranus and belongs to the technical field of cultivation of the pleurotus geesteranus. The cultivation method of the pleurotus geesteranus comprises the following steps: (1) batching: preparing a cultivation material by mixing and composting cottonseed hulls, corn straws, wheat bran, sawdust, peanut cake powder, grape residues, pitaya stems, passion fruit peel, banana peel, bee pupae, beancurd, durian peel, pineapple peel, expired yogurt, coffee residues and lime, and adjusting the moisture content to be 65 to 70 percent and the pH value to be 8 to 10; (2) bagging; (3) sterilizing; (4) inoculating; (5) performing mycelium culture; (6) performing fruiting management; and (7) harvesting. According to the cultivation method of the pleurotus geesteranus, the raw materials of the cultivation materials are wide in source and rich in nutrient, and the yield of the pleurotus geesteranus can be increased.

The invention discloses a catalyst for hydrogen production by steam high-temperature reforming of methanol and a preparation method and application of the catalyst. The catalyst takes TiO2/Al2O3 as acarrier, CeO2 and/or ZrO2 loaded on the carrier as a promoter and a ZnO-NiO bi-active center dispersed on the carrier as a catalyst active component, wherein the mass of the catalyst active componentaccounts for 15-30% of the total mass of the catalyst; and in the ZnO-NiO bi-active center, the mass ratio of ZnO to NiO is (70-90):(10-30), and the mass ratio of the promoter to the carrier is (5-15):(85-95). A noble metal is not taken as the raw material, shortcomings of a traditional Zn-Cr catalyst can be overcome, the catalyst can be applied to the high-temperature range of 350-550 DEG C and has high activity and selectivity and stable catalytic performance.

The invention belongs to the technical field of permanent magnet materials, and particularly relates to a high-corrosion-resistance permanent magnet rich in high-abundance rare earth and a preparationmethod of the high-corrosion-resistance permanent magnet rich in the high-abundance rare earth. The high-corrosion-resistance permanent magnet rich in the high-abundance rare earth comprises a strongmagnetic phase and a crystal boundary rare-earth-rich phase, wherein the strong magnetic phase e is an MM-Fe-B phase, and the crystal boundary rare-earth-rich phase is an MM-Fe phase. According to the method for preparing the permanent magnet, through a double-alloy process, an MM-Fe-B main phase alloy and an MM-Fe auxiliary alloy are prepared, smelted and crushed to prepare powder; the preparedMM-Fe auxiliary alloy powder is added into the main alloy to be evenly mixed according to the mass percent of 1% to 5%; and orientation pressing, sintering and heat treatment are conducted, and the finally sintered magnet is obtained. MM-Fe is introduced in a crystal boundary, thus distribution of the crystal boundary rare-earth-rich phase can be optimized, the crystal boundary rare-earth-rich phase partially replaces an original crystal boundary phase prone to corrosion, the intrinsic corrosion resistance of the MM-Fe-B magnet is improved, through the method, the proportion of low-cost rare earth La/Ce in the magnet is further increased, the material cost is lowered, the technological process is simple, and the high-corrosion-resistance permanent magnet rich in high-abundance rare earth is suitable for scale production.

The invention relates to a method for preparing a doping type carbon dioxide adsorbent ceramic. The doping type carbon dioxide adsorbent ceramic prepared by adopting the method is smaller in particle size, larger in specific surface area, high in material activity and strong in carbon dioxide adsorbing capability, and industrial production can be achieved through large-scale preparation.

The invention relates to a preparation method of a magnesium alloy with corrosion resistance in the surface and a functional protective layer on the surface, in particular to a method of increasing content of magnetic powder in a magnesium alloy micro-arc oxidation membrane, belongs to the technical field of surface processing. The method comprises the following steps: putting a magnesium alloy matrix in an electrolytic bath with a magnet arranged at the bottom firstly, adding the magnetic powder in electrolyte in the electrolytic bath, enabling the magnetic powder to uniformly cover the electrolyte, then adopting a micro-arc oxidation method to compound a ceramic membrane on the surface of the magnesium alloy, and forming a composite micro-arc oxidation ceramic membrane which is uniformly covered by the magnetic powder on the surface of the magnesium alloy, wherein the composite membrane layer is capable of reducing the number of micropores and cracks on the surface of the micro-arc oxidation membrane layer and improving corrosion resistance of the magnesium alloy. According to the method disclosed by the invention, the micro-arc oxidation membrane is enabled to have a magnetic function, by virtue of the magnet arranged at the bottom of the outer side of the electrolytic bath, the magnetic powder enters the oxidation membrane through a micro-arc oxidation fusion and discharge channel under the effect of magnetism, so that compound quantity of the magnetic powder in the micro-arc oxidation membrane is increased, the micro-arc oxidation membrane can more reflect the functions of the magnetic powder of electromagnetic wave absorption and shielding, and the application field of the micro-arc oxidation coating is widened.

The invention discloses a corrosion-resistant anti-microbial aluminum-profile rare-earth silane treating fluid. The corrosion-resistant anti-microbial aluminum-profile rare-earth silane treating fluid is prepared from, by weight, 120-130 parts of CeCl<3>7H2O, 180-190 parts of H2O2, 0.5-0.6 part of poly-sebacic glyceryl monolaurate, 0.3-0.4 part of nano samarium, 0.4-0.6 part of turpentine oil liquid anhydride, 0.4-0.5 part of itaconic acid, an appropriate amount of deionized water, 1-1.2 parts of tetraethyl orthosilicate, 5-5.2 parts of methyl triethoxysilane, 50-53 parts of ethanol, 10-11 parts of ammonia water, 15-15.6 parts of fluorine and silicon-containing polyacrylate emulsion and 2-2.5 parts of nano zirconium dioxide. The compactness of a film formed by the treating fluid is greatly improved, and the film has certain water-repellent performance. The film forming speed is high and the film is uniform and compact by using the poly-sebacic glyceryl monolaurate, the turpentine oil liquid anhydride and the itaconic acid. The antibacterial property, the oxidation resistance and abrasion resistance of the film are improved by using the nano samarium.

The invention discloses a process for coating liquid medicine on surfaces of patterns and letters on a sheet material to form a protecting film. The process comprises the following steps: a coating rubber roll is driven to rotate through a motor; a material guide roll is driven to rotate in the same direction through another motor; a liquid medicine roll is arranged behind the coating rubber roll, and is clung to and extruded with the coating rubber roll; liquid medicine enters the space between the liquid medicine roll and the coating rubber roll through an injection port; the liquid medicine roll is driven to rotate through a motor, so as to generate a medicine film with certain thickness on the surface of the coating rubber roll; simultaneously, the material to-be-coated is guided by the guide roll, and passes through the gap between the guide roll and the coating rubber roll; and the medicine film is coated on the material to-be-coated. According to the process, the film coated on the sheet material is level, the quantity of micro-pores is greatly reduced, and requirements for solidification can be met without further carrying out a flattening step.

The invention provides a graphite bipolar plate preparation method and the graphite bipolar plate. The method comprises the following steps of firstly, carrying out intercalation treatment on crystalline flake graphite, carrying out instantaneous expansion at a high temperature to obtain expanded graphite, pre-pressing the expanded graphite into plates with different densities, and carrying out pressure or vacuum impregnation in a low-viscosity organic solvent containing resin, and heating and evaporating the plate subjected to surface treatment in an oven to remove the solvent, carrying out die pressing under a vacuum condition to form a flow field, and curing to form the bipolar plate. According to the technical scheme, the density of the prepared graphite bipolar plate is 1.0-2.0 g/cm<3>, the tensile strength of the bipolar plate subjected to impregnation treatment is 25-35 MPa, the mechanical property is improved along with the increase of the resin content, the gas sealing property is good, the preparation method is beneficial to reducing the thickness of the polar plate, and batch production is easy.

The invention provides a method of preparing an oxidation film on the surface of a magnesium alloy by utilizing micro-arc oxidation. The method comprises the following steps that the magnesium alloy is placed into an electrolytic tank filled with an alkaline electrolyte, the magnesium alloy serves as an electrolytic anode, the electrolytic tank serves as an electrolytic cathode, voltage is appliedto allow plasma discharge to be generated on the magnesium alloy, the oxidation film is formed on the surface of the magnesium alloy by utilizing the micro-arc oxidation, and the components of the alkaline electrolyte are 8-12 g/L of NaOH, 10-15 g/L of Na2SiO3, 6-8 g/L of KF, 2-3 mL/L of H2O2, 6-8 mL/L of glycerol, 1-2 g/L of sodium ethylenediamine teramethylene phosphonate and the balance water;and in the micro-arc oxidation process, zeolite powder and gamma-aluminum oxide nano micropowder are sequentially added into the electrolyte, and a micro-arc oxidation reaction is continued to be carried out until the preparation of the oxidation film is completed. The reaction process of the micro-arc oxidation is affected through the synthetic action of the components, the amount of microporeson the surface layer of the oxidation film is reduced, the compactness of the oxidation film is improved basically, and the corrosion-resistant performance is strengthened.

The invention discloses a method and application for improving the sustained release properties of activated carbon on essence. The method comprises: acidifying activated carbon so that the surface contains acidic groups such as a hydroxyl group and a carboxyl group, and mixing water-soluble carbon quantum dots, acidified activated carbon and liquid essence. The water-soluble groups rich in the surfaces of the carbon quantum dots improve the dispersibility of activated carbon in the liquid essence, types of adsorption sites and the penetration of essence into activated carbon are increased andadsorption is convenient. In desorption, the specific surface area and pore volume of the acidified activated carbon are increased and the release rate is increased. The quantization of the surface of activated carbon does not influence the adsorption of the activated carbon on the essence, reduces the adsorption and adhesion of the surface of the activated carbon to the essence and improves thesustained release ability. The modified activated carbon adsorption essence can be used in a cigarette filter tip, can stably and uniformly release the fragrance at 45-65 DEG C and has good sustainedrelease effects.

The invention discloses wire enamel with high temperature classification. The wire enamel is characterized by being prepared by raw materials in parts by weight (kilogram) as follows: 30-35 parts of nylon 12, 10-12 parts of E-12 epoxy resin, 1-2 parts of magnesium hydrate, 8-10 parts of aluminum triphosphate, 12-15 parts of ethylene glycol, 6-9 parts of dimethyl terephthalate, 4-6 parts of trimethyl trimellitate, 2-3 parts of 3-methylphenol, 8-10 parts of nano bentonite, 10-12 parts of tripropylene glycol diacrylate, 1-2 parts of nano emery powder, 2-3 parts of dicumyl peroxide DCP, 8-12 parts of potassium hexatitanate whiskers, 7-9 parts of an auxiliary, 120-130 parts of cresol and 110-120 parts of xylene. With the adoption of the wire enamel with high temperature classification, forming of a paint film with uniform, dense and smooth surface can be facilitated during coating in the follow-up process, micropores are greatly reduced, and scratch resistance, harness, salt mist resistance and severe environment resistance of the paint film are remarkably improved.

The invention discloses non-chrome silver-based soldering flux and a preparation method thereof, and belongs to the field of soldering materials. The non-chrome silver-based soldering flux comprises, by weight, 39.0-41.0% of Ag, 29.5-31.5% of Zn, 2.5-3.5% of Sn, 1.3-1.7% of Ni, 0.1-0.2% of In, 0.05-0.1% of Co, 0.01-0.02% of graphene and the balance Cu and inevitable impurities. The soldering strength of the prepared soldering flux for stainless steel joints can reach 140 MPa, and the spreading performance and plasticity of the soldering flux are good.

The invention relates to a preparation method of a magnesium alloy surface corrosion-resistant and functional protective layer, particularly relates to the preparation method of a micro-arc oxidation membrane of a magnetic powder composite magnesium alloy, and belongs to the technical field of surface treatment. By adding nano magnetic powder into a micro-arc oxidation electrolyte, a composite micro-arc oxidation ceramic membrane uniformly covered with magnetic powder can be formed on the surface of a magnesium alloy, micro-pores and cracks in the surface of a micro-arc oxidation membrane layer can be reduced by virtue of a composite membrane layer, and the corrosion resistance of the magnesium alloy is improved; meanwhile, the micro-arc oxidation membrane has a magnetic function and certain properties such as electromagnetic wave absorption, and the application field of the micro-arc oxidation membrane is expanded.

The invention discloses oxidation-resisting corrosion-resisting aluminum profile rare earth silane treating fluid. The oxidation-resisting corrosion-resisting aluminum profile rare earth silane treating fluid is made from raw materials including, by weight, 120 parts to 130 parts of CeCl37H2O, 180 parts to 190 parts of H2O2, 1.6 parts to 1.8 parts of tetrabutyl titanate, 2.2 parts to 2.3 parts of chitosan, 0.5 part to 0.6 part of acetylacetone, 0.4 part to 0.5 part of H2SO4, a proper amount of deionized water, 1 part to 1.2 parts of tetraethoxysilane, 5 parts to 5.2 parts of methyl triethoxysilane, 50 parts to 53 parts of ethyl alcohol, 10 parts to 11 parts of ammonium hydroxide, 15 parts to 15.6 parts of fluorine-silicon-contained ylate emulsion and 2 parts to 2.5 parts of nanometer zirconium dioxide. According to the fluid, micropores and cracks on the surface of a film formed by the treating fluid are obviously reduced, the compactness is high, and a certain hydrophobic property is achieved; through using of the tetrabutyl titanate, the chitosan, the acetylacetone and the H2SO4, the crosslink level of the passivation film can be strengthened, forming of surface gathering objects can be restrained, and corrosion resistance and oxidation resistance of the passivation film can be strengthened.