48results about How to "Increased diffusion resistance" patented technology

The invention relates to a kind of method for manufacturing propylene by catalytic cracking alkene of no less than tetra carbon, which mainly solves the short catalyst regeneration period problem and the stability problems uninvolved in previous technique. The invention uses minor crystalline grain and molecular sieve with high silicon-aluminium ratio as the catalyst for catalytic cracking with alkene that no less than tetra carbon to manufacture propylene. According to the technique scheme that described above, the invention can solve the problems mentioned above excellently, and can be used in industrial production of manufacturing propylene by catalytic cracking with alkene.

The invention discloses a thermal barrier coating system, which comprises a base body, a bonding layer and a multilayer ceramic coating, wherein the multilayer ceramic coating is formed on the bonding layer and comprises a reinforcing layer, a transition layer and a toughness enhancing thermal insulation layer which are sequentially formed on the bonding layer, and vertical cracks are arranged on the toughness enhancing thermal insulation layer. In the thermal barrier coating system, the ceramic coating is provided with the toughness enhancing thermal insulation layer with the sufficient vertical cracks, the ceramic coating has the characteristic of high stress toughness through the existence of the vertical cracks, the thermal mismatch relieving capability of the ceramic layer is enhanced, and the thermal stress in the ceramic layer is reduced, so the characteristics of efficient thermal barrier and long service life are obtained. The reinforcing layer is prepared near an interface easy to generate unsticking, the oxygen atom diffusion resistance can be enhanced, in addition, the layer separation invalidation position is transferred from the interface to a position inside the ceramic layer far away from a thermal growth oxide layer (TGO), simultaneously, the transition layer is formed between the toughness enhancing thermal insulation layer and the reinforcing layer, the thermal mismatch stress can be effectively reduced, and the thermal barrier coating system has the characteristic that the service life is long.

The invention discloses a method for preparing a coated straw fiber-based water-retaining slow-release fertilizer. According to the method, a straw cellulose polysaccharide chain is used as a framework; acrylic acid and acrylamide substances generated by a reaction of acrylic acid and urea are grafted to a cellulose main chain; then crosslinking is carried out by a cross-linking agent to form a polymer with a three-dimensional network structure; meanwhile, the polymer with the three-dimensional network structure and polyvinyl alcohol interpenetrate through each other to form high-water-absorbing resin with a semi-interpenetrating network structure; then the high-water-absorbing resin with the semi-interpenetrating network structure coats fertilizer particles; and a mixed solution of polyvinyl alcohol, sodium alginate and carboxymethyl cellulose forms a membrane by crosslinking to coat the outermost layer of the fertilizer particles to obtain the coated straw fiber-based water-retaining slow-release fertilizer. The fertilizer disclosed by the invention has good mechanical properties and water absorption performance, has excellent slow release effects on the fertilizer, reduces nutrient loss, improves the utilization rate of the fertilizer, reduces maintenance cost of farmland in the later period, and improves the yield and quality of crops. The method provided by the invention has the advantages that the operation method is simple and convenient, cost is low, the additional value of straw application is improved, and the new idea of straw resourceful utilization is further expanded.

The invention relates to a lithium-air battery structure, including a lithium negative electrode, a porous diaphragm and a positive electrode which are sequentially laminated, an electrically conductive porous function layer is arranged between the lithium negative electrode and the porous diaphragm, the electrically conductive porous function layer is an electrically conductive porous carbon material layer or a composite layer of an electrically conductive porous carbon material and catalytic components, and mass ratio of electrically conductive porous carbon material to other functional components is 20:1 to 2:1. By the electrochemical reaction of the conductive porous functional layer and dissolved diffused oxygen or reactive oxygen species, the dissolved diffused oxygen or reactive oxygen species can be effectively consumed, the corrosion and damage to the lithium negative electrode can be reduced, and substantial improvement of the battery stability can be facilitated.

The invention belongs to the field of agricultural fertilizer, relates to a foliage fertilizer, in particular to a foliage fertilizer for a longan tree and a production method of the foliage fertilizer. The foliage fertilizer is prepared from the following raw materials in parts by weight: 7 to 10 parts of biochemical fulvic acid potassium, 12 to 15 parts of urea, 5 to 7 parts of washing powder, 7 to 13 parts of monopotassium phosphate, 8 to 14 parts of amino acid-chelated copper and boron, 6 to 13 parts of sucrose-complexed manganese and calcium, 8 to 12 parts of diaminoferric xanthohumate, 1 to 2.5 parts of sophocarpidine, 14 to 20 parts of magnesium sulfate and 6 to 10 parts of zinc sulfate. The foliage fertilizer prepared by the production method disclosed by the invention is good in fertilizer efficiency, is rich in multiple medium trace elements required by the longan tree, and meets nutritional requirements of longan; after application, the foliage fertilizer has a significant prevention effect for physiological yellow coloring, small leaf, mottled leaf, roll leaf and the lime of the fruit tree; by using the foliage fertilizer, toot system development of the fruit tree can be promoted, disease invasion is prevented, and disease resistance, drought resistance and cold resistance of crops are improved; the foliage fertilizer has effects of improving the growth speed of longan, promoting fruiting and swelling, improving the yield and the quality of longan, improving the resistance of the fruit tree and sterilizing.

The invention relates to a method for connecting a skutterudite thermoelectric material and an electrode by using a high-thermal-stability alloy composite intermediate layer, in particular to the method for connecting the skutterudite thermoelectric material and the electrode. The method aims to solve the problems of poor thermal stability and large contact resistance of a joint obtained by the existing skutterudite thermoelectric material welding method. The method comprises the following steps of 1, cleaning the skutterudite thermoelectric material and the electrode; and 2, preparing the intermediate connecting layer and a diffusion barrier layer by using an electroplating or physical vapor deposition method, and carrying out diffusion welding, wherein the intermediate connecting layer is made of Co, Fe or Ni, and the diffusion barrier layer is made of CoMo, CoW, FeMo or FeW. According to the method, the joint obtained by utilizing the intermediate connecting layer and the diffusionbarrier layer has low contact resistivity, and the thermal stability of the joint is high. The method is suitable for connecting the skutterudite thermoelectric material and the electrode.

The invention provides a sustained-release solid chlorine dioxide preparation.The sustained-release solid chlorine dioxide preparation comprises, by weight, 0.5%-25% of one or a mixture of liquid chlorine dioxide and a chlorine dioxide water solution, 20%-70% of sustained-release agents, 5%-40% of hygroscopic agents and 0.1%-3% of essence.The sustained-release solid chlorine dioxide preparation is prepared according to the steps of gradually adding the sustained-release agents into the hygroscopic agents at 5-15 DEG C, adding the liquid chlorine dioxide after sufficient soluble inflation, uniformly stirring and placing in a room temperature environment for sufficient hardening.The sustained-release solid chlorine dioxide preparation which is prepared from the highly water-soluble materials is soluble to water easily and used for cleaning, soaking or being sprayed on objects needing disinfection quite conveniently.The sustained-release solid chlorine dioxide preparation is simple in technology, low in price, safe and effective to use, capable of releasing chlorine dioxide gas in a sustained manner and long in effective service life.

The invention discloses a preparation method of a macroporous alumina support. The method is characterized by taking sawdust produced in the wood processing industry as a pore-enlarging agent, enabling the sawdust to adsorb an inorganic aluminium salt solution after carbonizing treatment, and kneading, forming, drying and roasting the sawdust and an alumina precursor after drying the sawdust, thus obtaining the macroporous alumina support. The alumina support obtained by the method is larger in specific surface area, more concentrated in pore size distribution and high in mechanical strength, also contains part of macropores with sizes more than 100nm, is suitable for preparing heavy/residual oil hydrogenation catalysts, and is favorable for removing macromolecular impurities in heavy/residual oil and delaying the increase of diffusion resistance in heavy/residual oil hydrogenation, thus being favorable for maintaining the activities of the hydrogenation catalysts and lengthening the running period.

The invention relates to a novel matrix sustained-release tablet containing loxoprofen sodium, in particular to a locoprofen sodium matrix sustained-release tablet with a regulation layer, which is capable of stably releasing for 8 hours, good in releasing effect, simple in process and low in cost.

The invention discloses a method for preparing an IPN structure PMMA-PU high-transparency composite board through ultrasonic assistance, and belongs to the field of composites. The method comprises the following steps that 1, raw materials (monomers, an initiator/catalyst, a cross-linking agent, a chain extender and the like) of polymethyl methacrylate (PMMA) and polyurethane (PU) are mechanically mixed to be uniform, and the materials are poured into a polytetrafluoroethylene mold after being subjected to vacuum degassing; 2, a sealing pressing head is placed on the mold to apply constant pressure; 3, the mold is placed in a temperature-adjustable low-frequency ultrasonic container, a sequential polymerization reaction is carried out under the action of ultrasonic waves, and the high-transparency interpenetrating polymer network (IPN) structure PMMA-PU composite board is prepared. The action of ultrasonic assistance is adopted, and the prepared IPN structure PMMA-PU composite board has the advantages of being low in microphase separation degree, high in transparency and the like and is expected to be applied to light bulletproof transparent materials.

The invention discloses a slow release type solid aromatic. The slow release type solid aromatic comprises the following components in percentage by mass: 40-46% of nanosilicon dioxide hollow spheres, 40-46% of essence, 4-10% of starch, 0.5-3% of superfine silica powder, 2.5-4% of polyvinylpyrrolidone and 1-3% of talcum powder, wherein particle size of each nanosilicon dioxide hollow sphere is 300-500nm. The invention also provides a preparation method of the slow release type solid aromatic. The preparation method of the slow release type solid aromatic comprises the steps of uniformly mixing nanosilicon dioxide hollow spheres, essence and auxiliaries, and carrying out direct compression, so that the slow release type solid aromatic is obtained. The slow release type solid aromatic has the advantages of uniform and slow fragrance release, long scent lasting time, no toxicity, no harm and high essence load capacity and can be widely applied to the fields of daily chemicals, textiles, leathers, coating and the like.

Generation of dislocation and increase of diffusion resistance at edge portions of source/drain regions in a CMIS are prevented. When source/drain regions in a CMIS are formed, argon is implanted to a P-well layer as a dislocation-suppressing element and nitrogen is implanted to an N-well layer as a dislocation-suppressing element before an ion implantation of impurities to a silicon substrate. In this manner, by separately implanting dislocation-suppressing elements suitable for each of the P-well layer and the N-well layer as well as suppressing the generation of dislocation, increase of diffusion resistance can be suppressed, yield can be improved, and the reliability of devices can be increased.

A positive electrode for a lithium secondary battery includes a positive electrode current collector; a lower positive electrode active material layer disposed on at least one surface of the positive electrode current collector; and an upper positive electrode active material layer disposed on the lower positive electrode active material layer, wherein the lower positive electrode active material layer includes 90% or more of a sphere-type carbonaceous conductive material as a conductive material, the upper positive electrode active material layer includes 90% or more of a needle-type carbonaceous conductive material as a conductive material, and the content of the conductive material contained in the lower positive electrode active material layer is larger than the content of the conductive material contained in the upper positive electrode active material layer.

An improved electrical interconnect for an integrated circuit and methods for providing the same are disclosed. The electrical interconnect includes an air bridge extending through a gaseous medium so as to reduce the capacitance of the interconnect. The air bridge is supported at a first and second end such that the air bridge is suspended above the substrate. The air bridge comprises a highly conductive material, such as silver, so as to provide the air bridge with a reduced resistivity. To inhibit gaseous medium from contaminating the air bridge, the air bridge further comprises an adherent coating interposed between the air bridge and the gaseous medium. A method of forming the electrical interconnect is also disclosed, wherein, prior to forming the adherent coating, the conductive material is processed so as to form fewer grain boundaries, which enhances the electrical properties of the air bridge.

The invention discloses a two-component epoxy anticorrosive coating, and belongs to the technical field of polymer anticorrosive materials. The coating is prepared by the following steps: sequentiallyweighing the following components in parts by weight: 40-60 parts of mixed epoxy resin, 30-40 parts of a solvent, 4-8 parts of a dispersing agent, 5-8 parts of a levelling agent, 4-8 parts of a coupling agent, 10-12 parts of epoxidized soybean oil and 20-35 parts of an additive; mixing the mixed epoxy resin and the solvent in a stirrer, adding the dispersing agent, the levelling agent, the coupling agent, the epoxidized soybean oil and the additive into the stirrer, performing mixing under stirring for 30-40 minutes under the conditions that the temperature is 40-50 DEG C and the rotating speed is 300-400 r/min to obtain an A component; weighing 12-20 parts of a curing agent to obtain a B component; and separately packaging the A component and the B component to obtain the two-component epoxy anticorrosive coating. The epoxy anticorrosive coating prepared by the technical solution of the invention has the characteristic of excellent corrosion resistance, and has wide prospects in development of technical industry of high polymer anticorrosive materials.

The invention discloses a zein-based nanometer sunscreen agent, and a preparation method and an application thereof. The nanometer sunscreen agent comprises zein and an organic sunscreen agent encapsulated by the zein, and the surface of the organic sunscreen agent is coated with the zein. The nanometer sunscreen agent has the advantages of mild synthesis conditions, short reaction time, effectiveness in inhibition of direct contact of the organic sunscreen agent with skins, reduction of direct contact of the organic sunscreen agent and reactive oxygen species (ROS) generated after light activation with skins, and inhibition of a series of phototoxicity caused by transdermal absorption, and is a novel nanometer sunscreen agent material.

The present invention provides a negative electrode active material for a lithium secondary battery, the negative electrode active material comprising: first negative electrode active material particles comprising first artificial graphite particles, and a carbon coating layer which is formed on the first artificial graphite particles and comprises hard carbon; and second negative electrode activematerial particles comprising second artificial graphite particles, wherein the difference in average particle diameter (D50) between the first negative electrode active material particles and the second negative electrode active material particles is at most 5 um, and the temperature at a heat radiation peak during a differential thermogravimetric analysis of the carbon coating layer is 580 DEGto 690 DEG.

The invention discloses a positive osmosis membrane capable of trapping ammonia nitrogen and resisting membrane pollution, a preparation method and applications thereof, wherein the positive osmosis membrane is a polyamide amine dendrimer surface grafted composite membrane, the base layer of the composite membrane is sulfonated polyethersulfone, and the separation layer is polyamide. The specificpreparation steps comprise: 1, preparation of sulfonated polyethersulfone base membrane; 2, preparation of polyamide composite membrane; and 3, preparation of polyamide amine dendrimer surface graftedcomposite membrane. According to the present invention, the positive osmosis membrane prepared by the method can be used for concentrating domestic sewage; the sulfonated polyethersulfone in the prepared positive osmosis membrane can significantly increase the hydrophilicity of the support layer to reduce the concentration polarization in the membrane, such that the water flux of the membrane issubstantially improved; and the polyamide amine dendrimer grafted on the polyamide active layer surface can improve the repulsive force of the membrane to ammonia nitrogen and the hydrophilicity of the membrane surface, such that the ammonia nitrogen trapping ability and the pollution resistance of the grafted membrane can be improved.