185results about How to "Improve properties" patented technology

The invention belongs to the field of adhesive properties of high polymer materials, and particularly relates to a copolyamide hot melt adhesive and a preparation method thereof. Dimer acid, propionic acid, hexamethylenediamine and 1, 3-diamino-2-propanol are used as raw materials to prepare polyamide resin, and then modified organic silicon and carboxylated nano silicon dioxide are used for modification to obtain the copolyamide hot melt adhesive. Polyamide resin is modified by adding organic silicon into the polyamide resin, macromolecular chain segments are easy to rotate due to introduction of flexible Si-O bonds, part of internal stress can be eliminated, fracture energy can be absorbed to the maximum extent, and the fracture performance of the resin is effectively improved; in addition, due to the introduction of the inorganic nanoparticles, the rigidity, stability and the like of the nanoparticles can be combined with the toughness, cohesiveness and the like of the graft polymer, so that the graft polymer has excellent properties of both the inorganic nanoparticles and the organic polymer.

The invention relates to the technical field of saline-alkali soil improvement, and discloses a composite improved saline-alkali soil composition based on biomass charcoal and a preparation method thereof.Biomass charcoal, glucose, lactic acid bacteria, saccharomycetes, aluminum sulfate and a quaternary ammonium salt modifier are added into a stirrer to be stirred and mixed, stirring is conducted, and a mixture is obtained; and obtaining the composite improved saline-alkali soil composition based on the biomass charcoal. A quaternary ammonium salt group in the quaternary ammonium salt modifier can reduce the pH value of the soil and reduce the alkalinity of the soil, so that the salinization condition of the soil is improved, and quaternary ammonium salt can promote the activity of soil microorganisms and improve the fertility of the soil and the growth environment of crops; the siloxane is converted to be neutral by adjusting the pH value of the soil, the siloxane is beneficial to reducing the alkalinity of the soil, and a more suitable growth environment is provided for plants; wherein the contained boric acid group reduces the pH value of the soil by neutralizing alkaline substances in the soil, and has a relatively good improvement effect on the saline-alkali soil.

The invention provides a flotation separation method for complex and difficult-to-separate high-sulfur copper ore, and belongs to the field of mineral flotation, lime is adopted to adjust ore pulp to a low-alkali environment, and efficient recovery of valuable elements of copper, silver and sulfur is achieved under the combined action of an inhibitor and a synergist. A low-alkali copper separation process is adopted, copper-sulfur intergrowth and silver-containing minerals are prevented from being strongly inhibited in a high-alkali ore pulp environment, regrinding is introduced before copper concentration operation to promote dissociation of the copper-sulfur intergrowth, and the grade of copper concentrate is improved. During copper roughing, gangue minerals and pyrite are inhibited by adopting an inhibitor to prevent the gangue minerals and the pyrite from forming a cover on the surface of metal minerals, and selective inhibition on the pyrite is generated in the forms of strong oxidation, electrostatic adsorption, hydroxylated metal point adsorption and the like on the surface of the pyrite; the synergist is adopted to change the surface charge of gangue minerals, the argillaceous gangue is prevented from forming a mucus coating on the surface of the chalcopyrite by means of electrostatic repulsion, meanwhile, the flotation froth performance is enhanced, floating of the chalcopyrite is accelerated, and the copper separation effect is optimized.

The invention relates to the technical field of catalysts, in particular to a cerium oxide-loaded carbon-coated nickel-based anti-sintering catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adding cerium oxide into a homogeneous solution containing soluble nickel salt and organic acid, stirring and drying to obtain a precursor; and roasting the precursor to obtain the cerium oxide-loaded carbon-coated nickel-based anti-sintering catalyst. The specific CeO2 is introduced to stabilize active metal particles (nickel) to prevent agglomeration, the anti-sintering capability of the catalyst is enhanced, side reactions are effectively prevented, and the yield of a target product is increased. Meanwhile, the synergistic effect of CeO2 and metal nickel can adjust the electronic property of metal, promote hydrogenation and dehydrogenation processes, change the property of a reaction interface and guide reactants to be adsorbed and converted in a more favorable manner, so that the yield of higher alcohols is improved.

The invention belongs to the technical field of gene engineering and enzyme engineering, and particularly relates to a glucanase mutant and construction and application of a gene sequence of the glucanase mutant, and the glucanase mutant has an amino acid sequence as shown in SEQ ID NO.2. The glucanase mutant is obtained by carrying out G214A mutation, S249P mutation and D286L mutation on an amino acid sequence as shown in SEQ ID NO. 1. The glucanase mutant has the advantages that the glucanase mutant is obtained; compared with the non-mutated EGL, the glucanase mutant EGL62 provided by the invention has the advantages that the thermal stability is obviously improved; after incubation at 75 DEG C for 3 minutes, the enzyme activity of 60% or above can still be maintained; the enzyme activity is still more than 50% after the enzyme is treated for 1 hour under the condition that the pH value is 3.0-7.0. The glucanase mutant EGL62 provided by the invention has the optimal pH value of 5.0 and the optimal temperature of 50 DEG C, and is good in stability and wide in application prospect.

The invention discloses a preparation method and application of bionic intelligent hydrophilic and hydrophobic fresh water collection fibers, and belongs to the technical field of chemical bionics. The preparation device comprises a fibril fixing frame, a symmetrical hole channel square liquid tank, a camera obscura ultraviolet analyzer and a fiber receiver. The method comprises the following steps: firstly, fixing fibrils on a fibril fixing frame, enabling a prepared polymer mixed solution with the mass fraction of 9%-15% and the fibrils to pass through a symmetrical pore channel square liquid tank, pouring the polymer solution into the square liquid tank, pulling the fibrils at a constant speed to sequentially pass through the square liquid tank, and curing generated bead string fibers through an ultraviolet curing box, finally, fixing the bead string fiber on a fiber receiver, and freeze-drying the received bead string fiber to obtain the bionic intelligent fresh water collection fiber with the micro-nano pore channel structure. The preparation device is simple, the preparation method is simple, and the cost is extremely low; the surface of the fresh water collecting fiber is provided with a nano-scale interpenetrating network pore channel structure, so that the fresh water collecting fiber is easy to weave and has excellent stability, and rapid capture and collection of liquid drops are realized.

The invention discloses a microorganism-inorganic compound fertilizer and a preparation method thereof, and belongs to the technical field of fertilizer preparation.The compound fertilizer is composed of a compound fertilizer A and a compound fertilizer B. The compound fertilizer A is prepared by adding glycerin into a microorganism bacterium solution and then loading with charcoal, and the charcoal and the glycerin can protect microorganisms and provide nutrition; good proliferation and growth of microorganisms are promoted; calcium bentonite is adopted to embed potash magnesium sulphate fertilizer to prepare granules to obtain a combined fertilizer B, and the calcium bentonite embedded potash magnesium sulphate fertilizer granules are treated to ensure that fertilizer components in the granules are slowly released at a constant speed within a long time; the potash magnesium sulphate fertilizer and the microorganisms are embedded and blended to prepare the combined fertilizer, the problem that the microorganisms and the potash magnesium sulphate fertilizer are incompatible is solved, the combined fertilizer A and the combined fertilizer B jointly act to provide nutrients for crops in the whole growth cycle, fertilizer waste is reduced, the fertilizer absorption rate is increased, meanwhile, the fertilization operation cost is reduced, and the production cost is reduced. Good application prospects are realized.

The invention discloses a water-soluble fertilizer suitable for Xinjiang'dry sowing and wet emergence 'cotton fields as well as a preparation method and application of the water-soluble fertilizer. Belongs to the technical field of water-soluble fertilizers. The water-soluble fertilizer comprises the following components in parts by mass: 5-41 parts of urea, 21-60 parts of urea phosphate and 13-48 parts of potassium sulfate. Potassium sulfate is mixed with other raw materials in batches by using a three-dimensional mixer, and then mixed granulation is performed. Compared with the prior art, the method has the beneficial effects that the water-soluble fertilizer is dripped along with water by utilizing a drip irrigation facility of a'dry sowing and wet discharging 'cotton field; according to the water-soluble fertilizer formula and the dripping method, the emergence rate of the cotton can be increased, and the problems that the emergence rate is difficult, weak and stiff due to nutrient requirements of growth and development of the cotton in the seedling stage, adverse factors such as an external saline-alkali environment in the seedling stage, tender roots and insufficient photosynthetic ability, and the like, and the problems of seedling deficiency and insufficient group construction caused by the phenomena are solved.

The invention provides a shortening grease composition and a preparation method thereof. Specifically, the invention provides the grease composition which comprises branched fatty acid triacylglycerol and base oil, wherein in terms of the total weight of fatty acid of the grease composition, the content of branched fatty acid in the grease composition is 2.50-9.00 wt%. The invention also provides an application of the grease composition and a method for reducing the crystallization rate of palm oil-based shortening, reducing the increase rate of the grease hardness after storage and delaying the subsequent hardness of the palm oil-based shortening. According to the invention, not only can the properties of the shortening be improved, but also the intake of branched chain fatty acid is increased, and a certain positive effect can be achieved in the aspects of cancer resistance, inflammation resistance and the like.

This invention discloses a method for improving expansive soil based on its clay mineral composition and a method for predicting its performance. The method for improving expansive soil based on its clay mineral composition includes the following steps: obtaining the optimal admixtures for montmorillonite, illite, and kaolinite clay minerals in expansive soil under different moisture contents through molecular dynamics simulations; after determining the optimal admixtures for the three clay minerals, adding the corresponding admixtures to the corresponding minerals, preparing soil test blocks for testing, and determining the optimal dosage based on the test results; and configuring admixtures to improve the properties of the expansive soil based on its moisture content and mineral composition. This invention constructs a coarse-grained model of real soil particles and corresponding admixtures, tests various properties of the model, and combines machine learning to predict the improvement effect of admixtures on expansive soil under different working conditions. The method of this invention is applicable to the improvement and performance prediction of different expansive soils in different regions and has universality.

The invention discloses nano-particles containing biological enzyme as well as a preparation method and application of the nano-particles. The double-drug nano-particle provided by the invention is prepared by taking a nano composite material Cu / ZIF-8 obtained by modifying a ZIF-8 carrier with a copper base as a carrier, wrapping PPE in the carrier, adsorbing a small molecule drug CB-839 outside to form a nano-drug, and modifying the nano-drug with hyaluronic acid. The double-drug nanoparticle improves the properties of free PPE and CB-839, improves the stability, prolongs the tumor residence time and enhances the curative effect; and PPE and CB-839 can be released under low pH response of lysosome in cells, so that high-efficiency and low-toxicity treatment of tumors is realized. The double-drug nanoparticle can achieve a synergistic anti-tumor effect that 1 + 1 is greater than 2, and has a good application prospect in preparation of anti-tumor drugs.

The invention relates to the field of carbon fiber composite materials, and discloses a sizing agent and a preparation method thereof, sizing carbon fibers and a carbon fiber composite material. The sizing agent comprises a flame-retardant epoxy resin emulsion, a polyvinyl alcohol aqueous solution, modified nano silicon dioxide sol and a curing agent. The sizing agent can significantly improve the flame retardant property of a carbon fiber composite material, improve the bonding property of flame-retardant epoxy resin and a carbon fiber sizing interface, and overcome the defect that the bonding property of flame-retardant epoxy resin and carbon fibers is poor due to the addition of a flame retardant.

Disclosed in the present specification is a ferritic stainless steel having improved corrosion resistance and magnetic properties improved by having an optimized manufacturing process and alloy components; and a manufacturing method therefor. The ferritic stainless steel having improved corrosion resistance and magnetic properties, according to one embodiment of the present invention, may comprise, by wt%, 0.0005-0.035% of C, 0.005-0.05% of N, 0.1-2.0% of Si, 0.1- 0.5% of Mn, 16.0-20.0% of Cr, Mo in an amount of more than 0% and less than or equal to 0.5%, Nb in an amount of more than 0% and less than or equal to 0.5%, 0.005-0.30% of Ti, and the balance of Fe and impurities.

The present invention relates to bismuth oxide nanoparticles that are surface-treated with a hydroxyl group-free carboxylic acid (a) and a hydroxyl group-containing carboxylic acid (b), as well as a production method for bismuth oxide nanoparticles, including a step of mixing and heating a hydroxyl group-free carboxylic acid (a), a hydroxyl group-containing carboxylic acid (b), and triphenylbismuthine (c).

The utility model discloses a kind of gas tank dry gas desulfurization systems.The system includes: low temperature absorption tower, in which raw material gas tank dry gas and low temperature absorption oil countercurrent contact;Primary amine liquid absorption tower, in which utilize amine liquid to remove hydrogen sulfide in dry gas after organic sulfur is removed;Hydrolysis reactor, in which carbonyl sulfur in primary absorption tail gas is hydrolyzed, and hydrolysis tail gas is obtained;Secondary amine liquid absorption tower, in which utilize lean amine liquid to remove hydrogen sulfide in hydrolysis tail gas, and after absorption, purified dry gas is obtained.The desulfurization system of the utility model can purify and remove organic sulfide and hydrogen sulfide in dry gas, reduce sulfur content in gas, and then reduce SO2 content in flue gas discharged from heating furnace of subsequent each device, ensure that heating furnace of whole plant is safe, environmental protection, high efficiency and stable operation.

The application discloses a preparation method and system of a shoe with a variable gradient porous structure based on stress, and belongs to the technical field of 3D printing, and comprises the following steps: scanning a foot shape to generate a shoe contour shape; collecting stress distribution of a foot bottom, obtaining boundary distribution of the stress of the foot bottom through boundary fitting, and generating a stress function area; fitting the stress function area into the shoe contour shape, obtaining gradient transition changes according to the size relationship between the stresses between the stress function areas, and generating a gradient change area of the shoe contour shape; and based on 3D printing technology, printing the shoe contour shape with the stress function area and the gradient change area into a shoe with a Gyroid variable gradient porous structure and suitable for the foot shape based on an elastic material such as TPU. The application proposes an application method of a human foot shape and a foot stress measurement method in shoe design, and increases the service range of 3D printing customization.

The present disclosure relates to a positive electrode active material comprising at least one secondary particle comprising an agglomerate of primary macro particles, a method for preparing the same and a lithium secondary battery comprising the same. According to an embodiment of the present disclosure, it is possible to improve the electrical and chemical properties by partial coating of the secondary particle with cobalt and aluminum on the surface. Accordingly, it is possible to provide a nickel-based positive electrode active material with improved stability at high temperature and high voltage.

The invention discloses a low-temperature high-toughness petroleum drill rod and a preparation method thereof, and belongs to the technical field of metallurgy. The petroleum drill rod comprises the following components in percentage by mass: 0.23%-0.28% of C, 0.17%-0.39% of Si, 0.9%-1.10% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 1.05%-1.15% of Cr, 1.05%-1.15% of Ni, 0.24%-0.32% of Mo, 0.03%-0.06% of Nb, 0.01%-0.03% of Ti, 0.003%-0.009% of Re, 0.009%-0.015% of Al, 0.009%-0.015% of Ca, less than or equal to 0.002% of O, less than or equal to 0.00015% of H, less than or equal to 0.003% of N and the balance of Fe and inevitable impurities. Through reasonable design of the components, the minimum yield strength of the pipe body respectively meets the requirements of 105ksi and 135ksi, that is, the room-temperature yield strength is respectively 724-931 MPa (G105L) and 931-1138 MPa (S135L), the tensile strength is respectively 793-1000 MPa (G105L) and 1000-1207 MPa (S135L), and the ductility is greater than or equal to 20%; the weld bearing capacity is higher than that of the pipe body; and the impact energy of the pipe body and the welding seam at-40 DEG C is greater than or equal to 100J and 60J. And the requirement for safe use of the high-strength drill rod of deep oil and gas development under complex extremely-low-temperature working conditions can be met.

Provided is a novel technique for providing a substrate advantageous when producing a sensor for analysis. The substrate for producing a sensor for analysis provided in the present disclosure has specific characteristics (for example, monodispersion, a single layer, or a specific density), such that it is possible to produce a sensor for analysis that is stable and enables highly accurate analysis. In the present disclosure, it is not required to remove excess fine particles after arranging the fine particles on the substrate, reproducibility of the density of the fine particles immobilized on the substrate is improved, and monodispersibility and single-layer properties are also improved.

The present invention relates to a braking device (10) for braking a shaft (12) of an escalator, the braking device comprising a brake disc (14) designed to be fixed in rotation to the shaft (12) of the escalator, the brake disc (14) having at least one braking surface (16) with a respective main extension plane (E) at least one friction element (18) displaceably mounted parallel and perpendicular to the main extension plane (E) for frictionally applying a braking force to the at least one braking surface (16); and an actuating means (26) for spacing and / or applying the at least one friction element (18) from the at least one braking surface (16). Further, the present invention relates to an escalator having a braking device (10) acting on a shaft (12) of the escalator.

The invention discloses a vacant area filling planting method for long Wuhua beans, and belongs to the technical field of planting, the method comprises the following steps: (1) sowing: deeply plowing the land by using a deep plowing machine, selecting pest-free and damage-free long Wuhua bean seeds, and sowing by using a drill sowing mode; (2) root system management: performing root cutting treatment on lateral roots 15-20 days after seedlings of the long Wuhua beans emerge, applying secretion-promoting particles to the surface of the soil after the root cutting treatment, and then ploughing the secretion-promoting particles into the soil; (3) later-period management: watering the long Wu beans, managing diseases and insect pests, and harvesting or returning the long Wu beans to the field after the long Wu beans are planted for 3 months, so that the problem that harmful carboxylic acid is accumulated due to promotion of root secretion of the long Wu beans is solved.

The application discloses a dry gas deep desulfurization process. The process comprises the following steps: (1) removing hydrogen sulfide from refinery dry gas through a first-stage amine liquid absorption tower; (2) removing organic sulfur from tail gas of the first-stage amine liquid absorption tower in a low-temperature absorption tower; (3) sequentially exchanging heat between the absorption tail gas and raw dry gas, and between the absorption tail gas and hydrolysis tail gas, and then heating the absorption tail gas, and then inputting the absorption tail gas into a hydrolysis reactor to convert carbonyl sulfur into hydrogen sulfide; and (4) inputting the hydrolysis tail gas into a second-stage amine liquid absorption tower, and countercurrently absorbing the hydrolysis tail gas with lean amine liquid in the tower to remove hydrogen sulfide in the dry gas. The application can purify and remove sulfides in the dry gas, reduce the content of organic sulfur and hydrogen sulfide in the gas, reduce the content of SO2 in flue gas discharged from a heating furnace of each subsequent device, and ensure safe, environmentally-friendly and efficient and stable operation of the heating furnace of the whole plant.

There is provided a novel sophorolipid derivative having high water solubility and surface activity. A plurality of sophorolipid derivatives having a novel structure is isolated and purified from a cultured product of sophorolipid producing microorganism (Starmerella bombicola, etc.) (wherein, R1 to R3 are each independently hydrogen, a fatty acid ester having 2 to 22 carbon atoms, or the above SL group, provided that at least one of R1 to R3 is the SL group in which R are the same or different and each represent hydrogen or an acetyl group and Rn is a linear or branched alkyl or alkenyl group having 13 to 21 carbon atoms).

This invention relates to anti-CD70 antibodies and antibody drug conjugates comprising at least one non-naturally encoded amino acid. Disclosed herein are αCD70 antibodies with one or more non-naturally encoded amino acids and further disclosed are antibody drug conjugates wherein the αCD70 antibodies of the invention are conjugated to one or more toxins. Further disclosed are methods for using such non-natural amino acid antibody drug conjugates, including therapeutic, diagnostic, and other biotechnology uses.

The invention relates to the technical field of welding, in particular to high-corrosion-resistance and high-strength welding flux and a preparation method thereof.The welding flux comprises brazing filler metal and brazing flux, and the brazing filler metal comprises 40-55 parts of aluminum, 12-16 parts of aluminum-silicon alloy, 27-33 parts of copper, 0.5-5 parts of germanium, 0.6-1 part of manganese, 0.2-0.6 part of titanium, 2-5 parts of tin and 0.1-0.5 part of rare earth elements; the brazing flux comprises 25 to 50 parts of potassium chloride, 10 to 35 parts of sodium chloride, 4.0 to 30.0 parts of lithium chloride, 10 to 20 parts of a potassium fluoride-aluminum fluoride compound, 0.5 to 6 parts of zinc chloride, 2 to 6 parts of zinc fluoride, 0.05 to 3 parts of sodium fluoride, 0.05 to 3 parts of lithium fluoride, 0.05 to 2 parts of potassium hexafluorosilicate and 0.05 to 1.5 parts of potassium bifluoride. According to the welding flux, through mutual cooperation of the brazing filler metal and the brazing flux, the strength, corrosion resistance and stability of a welded joint are jointly improved.

The present invention relates to White Top Kraftliner paper comprising two to three layers of bleached or unbleached chemical fibers wherein the layers total 100% short eucalyptus chemical fiber, and at least one bulk additive. It also refers to the production process of said paper, use of said paper, and packaging produced with said paper.

Disclosed is a secondary battery. The secondary battery has a structure including an internal core portion containing an electrolyte having a relatively lower crosslinking degree, and surrounded with a peripheral portion containing an electrolyte having a relatively higher crosslinking degree. It is possible to provide an effect of improving both ion conductivity and mechanical properties by virtue of such structural characteristics. In addition, the electrolyte portion having a lower crosslinking degree is confined by the electrolyte having a higher crosslinking degree to provide an effect of preventing electrolyte leakage. In addition, the secondary battery can be obtained by a simple method that includes crosslinking only the peripheral portion before the core portion reaches to a crosslinking temperature and is crosslinked under an environment preheated to the crosslinking temperature or higher. As a result, there is no adverse effect upon the processing efficiency, since any separate device or system line is not required to carry out the crosslinking.

The present invention provides an integrated device and method for offshore wind power foundation anti-scour and aquaculture cages, including a grouting system on a mother ship and an integrated system for anti-scour and aquaculture cages, the grouting system including an air compressor, a sealable transparent pressure-resistant barrel, a detachable partition, a pressure gauge, a slurry delivery valve and a high-pressure slurry delivery pipe, the integrated device including a pressure-resistant grouting pipe, a flexible anti-scour non-woven fabric, a lead block, an aquaculture cage, and a circular cage, the grouting pipe is fixed by a circular cage and covered with a flexible anti-scour non-woven fabric, and an aquaculture cage is set on top. The present invention also discloses a method for using the above device. The integrated system for offshore wind power foundation anti-scour and aquaculture cages of the present invention can realize an effective combination of an offshore wind power foundation anti-scour device and a fishery cage, effectively solving the problems of reduced foundation stability and bearing capacity due to seabed scour, as well as the lack of offshore aquaculture and fish trapping devices.

The invention discloses a method and system for efficient fluorine removal by using sulfate and phosphate in combination, belonging to the field of water treatment technology. When fluorine-containing wastewater flows through a primary reaction tank and a primary sedimentation tank, a control system accurately controls the amount of sulfate added, and the sulfate is fully mixed in a pipeline mixer. After entering the primary reaction tank, calcium ions, fluoride ions and sulfate ions in the water react together, so that sulfate is doped in calcium fluoride particles, and calcium fluoride quickly agglomerates and sinks, so that the area of ​​the sedimentation tank is reduced by half of the original area. In order to achieve the purpose of deep fluorine removal, phosphate and calcium salt are added to the secondary defluorination system to generate more insoluble precipitates with fluoride ions, so that the fluoride ion concentration of the effluent water is reduced by less than 1 mg / L. The invention not only has a simple process flow and high automation, but also because the addition of sulfate promotes precipitation, the area of ​​the sedimentation tank is reduced, saving costs, and at the same time, because the addition of phosphate generates more insoluble precipitates, fluorine can be removed efficiently.

The utility model relates to the technical field of agricultural fertilization equipment, in particular to fertilization equipment for farmland improvement. The machine comprises a frame, a moving device, a soil turning device, a sowing device, a spraying device, a soil covering device and a watering device, the soil turning device is installed at the front end of the frame, the sowing device is installed on the frame, the sowing direction of the sowing device is downward, the spraying device is installed on the frame, the spraying direction of the spraying device is downward, and the soil covering device covers the soil covering device. The soil covering device and the watering device are installed at the rear end of the frame, and a conveying belt is installed between the soil turning device and the soil covering device. The soil turning device, the sowing device, the spraying device, the soil covering device and the watering device are integrated on one device, so that all operations of farmland soil turning, fertilization and watering are realized, mutual cooperation is realized, a scientific and reasonable fertilization method is realized, the soil property is effectively improved, the soil fertility is improved, and meanwhile, the fertilizer and water retention of the farmland is facilitated; and farmland improvement is facilitated to be suitable for efficient growth of various crops.