44results about How to "Change in surface activity" patented technology

The invention discloses magnesium hydride compound powder. The magnesium hydride compound powder is mainly prepared from raw materials in parts by weight as follows: 100 parts of magnesium powder, 5.3-11.4 parts of graphite, 0.5-2.3 parts of graphene and 0-1.7 parts of an antioxidant, the raw materials are subjected to ball milling for 1-2.5 h at the temperature of 150-200 DEG C under the hydrogen atmosphere, and the magnesium hydride compound powder with the particle size of 15-25 nm is prepared. The invention further discloses a hydrogen preparation and storage integrated device adopting the magnesium hydride compound powder. The hydrogen preparation and storage integrated device comprises a feeding device, a water supply device, a hydrogen generator and a hydrogen separation device, wherein a powder spraying device and a water spraying device are arranged on the hydrogen generator; a powder output port of the feeding device is connected with a powder input port of the powder spraying device; a water outlet of the water supply device is connected with a water inlet of the water spraying device; a mixed gas input port of the hydrogen separation device is connected with a mixed gas output port of the hydrogen generator. A small amount of graphite and graphene is added to magnesium hydride, and reaction kinetics of magnesium hydride is improved; the raw materials and water are added to the hydrogen generator in a spraying manner, so that the reaction efficiency is improved.

The invention discloses a low-temperature cashmere dyeing method adopting ethanolamine for pretreatment. The method is characterized by pretreating cashmere with ethanolamine at a concentration of 6-10g/l at 30 DEG C in a bath ratio of 1:50, carrying out water bathing for 10-20 minutes, carrying out steaming for 5-10 minutes at 100 DEG C, after pretreatment, using a dye with volume concentration of 5-10%, adding 6g/l anhydrous sodium sulfate and 8g/l peregal 0, regulating the pH value to 4-5, carrying out water bathing and adding a low-temperature aid for dyeing at 80 DEG C, wherein the dye is an acid dye or a reactive dye; the bath ratio of water bathing in the dyeing step is 1:50 and the time is 60-80 minutes; the low-temperature aid is JL-D or ZJ-W; and the volume concentration of the low-temperature aid is 0.5-2%. The method has the obvious advantages that the strength of the yarns after dyeing is 15% higher than that after normal dehaired wool dyeing; the yarn spinnability can be greatly improved; and the damages of dyeing to fibers can be reduced.

The invention discloses a cleaning process for changing metal surface activity, which includes hydrocarbon cleaning, vacuum bath cleaning and drying, and vacuum gas phase cleaning process. The vacuum gas phase cleaning process is to place workpieces in it and dry The inorganic gas is introduced, and under the action of the radio frequency power supply, the inorganic gas is decomposed into high-speed ions and hits the surface of the workpiece to form a vacuum gas-phase cleaning. The vacuum gas-phase cleaning time is 180-360s, and the intake rate of the inorganic gas is 100-400mL/ minute. In the vacuum gas phase cleaning, the high-speed running ions hit the surface of the workpiece, thereby changing the surface activity of the workpiece surface, forming a rough surface invisible to the naked eye on the surface of the workpiece, which is conducive to subsequent processing, such as spraying, electroplating, anode, vacuum coating, etc., and after processing The epidermis has strong adsorption and is not easy to fall off.

The invention discloses a method for removing flux from the surface of a substrate and a chip on the substrate. The method comprises the following steps of 1, cleaning flux on the substrate and the chip on the substrate by a water-based cleaning reagent firstly; 2, performing cleaning on the substrate and the chip on the substrate after being cleaned in the step 1 by adopting a bromopropane gaseous phase cleaning technology; and 3, performing argon plasma cleaning on the substrate and the chip on the substrate after being cleaned in the step 2 by adopting a plasma cleaning system. By adoptionof the method, the flux and pollutants on an electronic assembly can be removed, and the residual flux in the tiny gaps also can be completely taken away; in addition, the surface activity on the electronic assembly also can be changed, and the surface bonding state between a transmission line and a gold wire bonding pad also can be improved, thereby improving the bonding adhesive property and improving the bonding process reliability; by virtue of the method, the cleaning efficiency is improved, the yield is high and the process is simple; and low toxicity can be realized as far as possible on the basis that the cleaning capability can be satisfied, and strong respiratory tract irritation can be avoided.

The invention relates to a high-performance fabric self-pressurization carrier dyeing method and belongs to the technical field of textile printing and dyeing. According to the method, carbon dioxideand ammonia gas generated by thermal decomposition of ammonium bicarbonate are utilized in the dyeing process of a high-performance fabric, the carbon dioxide enables the pressure intensity in a closed space of a dyeing cup to be increased, the solubility of the ammonia gas to rise and the amount of formed ammonia water to be increased, the polarity of the ammonia water is strong, the surface activity of fiber can be changed, and it is facilitated that the active chlorine generated by the complexation effect of N,N-dimethylacetamide and sodium chloride acts on the high-performance fiber, the hydrogen bonding force among macromolecular chains of the fiber is weakened, and the porosity of the fiber is improved. The N,N-dimethylacetamide has strong polarity under the low temperature dyeing condition of 70-90 DEG C, the dissolving concentration of dye can be effectively improved, the micelle concentration of the dye is reduced, the dye molecules are easy to adsorb and dye the high-performance fabric, and the dyeing efficiency of the high-performance fabric is effectively improved. In addition, the method can achieve a better dyeing effect at a relatively low dyeing temperature, and theproduction cost and the energy consumption are reduced.

The invention relates to an ozone elimination catalyst with a porous substrate as the carrier. The ozone elimination catalyst is prepared by loading a coating solution on the porous substrate. The coating solution comprises the following active ingredients by weight: 0.8-1.2 parts of stearic acid sorbitol ester, 1.6-2.4 parts of OP-10, 4.2-5.8 part of polyethylene glycol, 0.15-0.85 part of carboxymethyl cellulose sodium, 1.1-1.9 parts of polyvinyl alcohol, 3.2-4.8 parts of vinyl acetate, 90-110 parts of water, and 2-50 parts of a nano-metal oxide. The invention also provides a preparation method of the ozone elimination catalyst with the porous substrate as the carrier. The prepared catalyst has the advantages of long service life, low cost, small wind resistance, and no secondary dust.

The invention relates to a method for producing calcium carbide pellet raw material by recycling calcium carbide furnace gas fly ash, semi-coke powder and lime powder. The method comprises the following steps: (1) uniformly mixing the calcium carbide furnace gas fly ash, semi-coke powder and lime powder in a proper ratio according to composition of the raw material, so that a mixture is obtained; (2) adding water into the mixture and humidifying, adding composite adhesive at the same time, uniformly stirring by adopting a stirring machine and then carrying out ageing and homogenizing treatment; (3) feeding the aged powdery product into a roll-type forming machine to be formed, so that solid pellets in a certain shape are obtained; and (4) drying the solid pellets by utilizing hot flue gas generated in combustion of a hot air furnace. The method provided by the invention utilizes solid waste produced in calcium carbide production, and environmental pollution is avoided; and the composite adhesive is added, so that heat intensity of the pellets is improved, and organic adhesive improves cold intensity of the pellets.

The invention discloses copper-iron intermediate alloy and a preparing method thereof. The copper-iron intermediate alloy is prepared from, by mass percentage, 20-50% of Fe, 0.01-1.0% of Ni, 0.01-1.0%of Cr, 0.01-0.5% of Mg, 0.01-0.5% of Y, 0.01-0.05% of S, 0.005-0.03% of P and the balance copper and other inevitable trace impurities. The invention further provides a preparing method of the copper-iron intermediate alloy. Ni, Cr, Mg, Y, S, P and other various metal elements are added, and a technology of combining smelting with compressed air blowing and quick cooling is adopted under a non-vacuum condition. According to the copper-iron intermediate alloy prepared by means of the method, segregation and beneficiation of iron in ingot casting are avoided, the component homogeneity is greatly improved, and can reach the range of +/-2%, and the average size of the iron-rich phase is smaller than or equal to 50 micrometers.

The invention discloses environment-friendly printing ink. The environment-friendly printing ink contains the following raw materials in parts by weight: 40-60 parts of modified water-based acrylic resin, 5-10 parts of nano-composite fillers, 3-5 parts of a functional aid, 10-20 parts of soybean oil fatty acid ethyl ester, 3-5 parts of an anti-skinning agent, 25-30 parts of a coupling agent, 1-3 parts of a defoamer and 5-10 parts of a slipping agent. The invention further discloses a preparation method of the printing ink. The modified water-based acrylic resin, the soybean oil fatty acid ethyl ester and the coupling agent are taken as the main materials, and the nano-composite fillers, the functional aid, the anti-skinning agent, the defoamer and the slipping agent are added to prepare the printing ink, and the prepared printing ink does not contain heavy metal additive and harmful organic additive and has the characteristics of environmental friendliness, no pollution, high heat resistance, good adsorbability and high antibacterial performance.

The invention relates to the field of materials, in particular to an environment-friendly bentonite adsorbent and a preparation method thereof. The environment-friendly bentonite adsorbent is prepared from, by weight, 60-75 parts of bentonite, 7-13 parts of chitosan, 4-5 parts of starch, 4-5 parts of partially hydrolyzed polyacrylamide, 0.7-1.5 parts of cetyl trimethyl ammonium bromide and 11-15 parts of microbead particles with the particle size of 0.1-5 microns. Through the modification of the micro-bead particles and the bentonite by various organic substances, the adsorbent with a good adsorption property is finally prepared. The partially hydrolyzed polyacrylamide can be effectively grafted onto the starch to increase the grafting rate of nonionic groups on the starch. The microbead particles are filled among bentonite particles. Through the modification of the outer surfaces of the micro-bead particles and bentonite by the organic substances, the surface activity and micro-structures of interlayers are changed to improved the adsorption property of the adsorbent.

The invention discloses a nanometer material reaction kettle capable for preventing agglomeration, which comprises a reaction kettle body, the top of the reaction kettle body is provided with a feed inlet, an atomizer is arranged on the top of the reaction kettle body, and the atomizer is connected to the reaction kettle body through the feed inlet; a magnetic induction coil jackets the reaction kettle body, and the magnetic induction coil is connected to a circuit; a horizontally arranged rotary shaft is arranged in the reaction kettle body, a plurality of agitating groups which are sequentially arranged are arranged on the rotary shaft, each agitating group comprises a plurality of agitator arms which are perpendicularly connected to the rotary shaft, and the side of one end, which is far from the rotary shaft, of each agitator arm is provided with a recess. By atomizing fed material, the reaction kettle disclosed by the invention first increases the dispersivity of the raw material, so that the raw material can be sufficiently stirred, and thereby the production quality is increased; moreover, the magnetic induction coil is utilized to generate a magnetic field to change the surface activity between nanoparticles, consequently, the dispersivity of the material is increased, and the agglomeration between the particles is prevented.

The invention discloses a liquid nano combustion material and a preparation method thereof. The liquid nano-combustion material is prepared from the following raw materials in parts by weight: 20.0 to 40.0 parts of gasoline, 40.0 to 80.0 parts of methanol, 0.5 to 2.5 parts of modified nano nickel powder, 0.3 to 1.0 part of calcium alkyl salicylate, 5.0 to 8.0 parts of di-tert-butyl peroxide, 1.0to 2.0 parts of tert-butyl dimethyl chlorosilane, 0.05 to 0.10 part of diethylene glycol monoethyl ether, 0.01 to 0.04 part of dibenzoyl peroxide, 2.0 to 4.0 parts of cyclohexylamine and 1.5 to 4.5 parts of catalytic combustion improver. According to the liquid nanometer combustion material prepared by the invention, the compatibility of all the components is good, the components are synergistic,the combustion heat value of the liquid nanometer combustion material can be increased, energy waste is reduced, environmental pollution is reduced, and resources are saved.

The invention provides a method for manufacturing a recycled propene polymer (PP) and recycled poly ethylene (PE) wood-plastic greenhouse framework material. The method comprises the steps of mixing wood meal, recycled PP plastics, recycled PE plastics, an antioxidant, filler, a lubricant, a coupling agent and toner, heating the raw materials to 80-90 DEG C, performing heat preservation for 5-10 min, and performing cold mixing for 5-10 min. According to the method, the shortcomings that an existing greenhouse framework material is insufficient in rigidity and toughness are overcome, the prepared greenhouse framework material has the advantages of high rigidity and high toughness and is good in outdoor weather resistance and excellent in deformation resistance, and resources are recycled.

The invention discloses a low-concentration flue gas desulfurization method for hydroelectric silicon smelting. The method comprises the following steps: 1) preparing absorption slurry, namely fully uniformly mixing a desulfurization adsorbent ground to the granularity of 325-400 meshes and water so as to obtain the absorption slurry; 2) absorbing acid gas, namely enabling the absorption slurry and flue gas to be fully contacted in a desulfurizing tower when flue gas during hydroelectric silicon smelting enters a desulfurization system, so that acid gas and particles in the flue gas are absorbed by the absorption slurry; and 3) discharging the flue gas, namely detecting the emission concentration of SO2 at the outlet, discharging the SO2 while meeting requirements, if not, returning to thedesulfurization system to treat, filtering the absorption slurry after absorption, and returning the filtrate to the step (2) to serve as absorption liquid, and taking the filter residues as by-products for sales, thereby obtaining the product. According to the method disclosed by the invention, limestone and other desulfurization adsorbents are mixed with water to prepare the absorption slurry,the flue gas enters the desulfurization system to be fully contacted with the slurry, and the acid gas and particles are removed, so that the emission concentration of sulfur dioxide in the flue gas is reduced to 80mg/Nm3, and green and environmental-friendly production is effectively realized.

The invention provides a vanadium titano-magnetite grinding aiding method and system. The method comprises the following steps: preparing a citric acid solution with a certain concentration; carryingout primary crushing on the vanadium titano-magnetite; screening the crushed vanadium titano-magnetite through a fine screen, crushing the vanadium titano-magnetite left on the fine screen again, andenabling the vanadium titano-magnetite passing through the fine screen to serve as crushed ore; feeding the crushed ore into a mill, and adding a citric acid solution for ore grinding; and carrying out water screening on the vanadium titano-magnetite obtained after ore grinding through a standard screen. According to the method, the prepared citric acid solution is added in the ore grinding process to assist in grinding, so that the surface activity of minerals is changed, the ore grinding efficiency is effectively improved, the ore grinding energy consumption is reduced, and the ore dressingcost of the vanadium titano-magnetite is reduced.

The invention relates to the technical field of waterproof materials, and provides an efficient waterproof material for tunnels and a preparation method thereof in order to solve the problem that an existing waterproof material is poor in fracture resistance and tensile property during construction. The efficient waterproof material for tunnels is prepared from the following components: filler, modified paraffin, modified rubber, polyvinyl chloride, an antioxidant, a tackifier, coupling modified bamboo charcoal fibers and polyacrylonitrile fibers. Modified rubber is further added into the filler, the modified rubber is firstly put into a sodium hydroxide solution to be soaked and passivated, then the passivated rubber reacts with an anionic surfactant, the surface of the rubber is modified through the anionic surfactant, the rubber can be in full contact with graphene oxide and a silicon-hydrogen compound, and the graphene oxide and the silicon-hydrogen compound are grafted on the surface of the rubber, so that the ductility and the strength of the rubber are improved.