11results about How to "No heating required" patented technology

The invention provides a ferronickel-based oxygen evolution electrode and a preparation method thereof based on interface confinement. The preparation method of the ferronickel-based oxygen evolution electrode comprises the following steps: preparing a precursor solution containing ferrous ions and ferric ions; the foamed nickel substrate is cleaned; the cleaned foamed nickel is tightly attached to the surface of the bottom of the reaction container, the foamed nickel is immersed in the precursor solution, under the room-temperature standing condition, divalent and trivalent iron ions are induced to be subjected to a synergistic hydrolysis and coprecipitation reaction through a physical interface confinement space formed by an attached interface, and the nickel-based composite material is obtained. Therefore, a high-activity and high-uniformity nickel-iron-based (oxygen) hydroxide catalyst layer (DIC-NiFeOOH / NF) is grown on the surface of the foamed nickel in situ. The method is simple in process, green and energy-saving, and the prepared nickel-iron-based oxygen evolution electrode shows excellent performance in oxygen evolution reaction and anion exchange membrane water electrolysis.

The present application relates to the preparation method of carboxyl endocyclic anhydride and the preparation product. The preparation method of compound of formula (II) comprises the following steps: reacting compound of formula (I) with a cyclization reagent to generate compound of formula (II) and acid, and using an epoxide compound as an acid scavenger. The present application is a new synthesis method of carboxyl endocyclic anhydride, which has the advantages of low cost, low requirement for reagents, site and equipment, mild conditions, wide substrate application range, high functional group tolerance, recyclable solvent and other high value-added by-products in the synthesis route, less waste liquid discharge, easy scale-up, high industrial and academic value, and the like, and can greatly promote the rapid large-scale production and application of polyamino acid, polyhydroxy acid (polyester), polymercaptan acid (polythioester) and the like.

The invention discloses a metal oxide embedded carbon nanotube nano flexoelectric material and a preparation method and application thereof, and the preparation method comprises the following steps: opening a carbon nanotube to obtain an opened carbon nanotube; mixing the open carbon nanotube, hydrolytic salt and water to obtain a hydrolytic salt carbon nanotube solution; carrying out vacuum filtration on the hydrolytic salt carbon nanotube solution, and drying to obtain a hydrolytic salt embedded carbon nanotube material; and carrying out annealing treatment on the hydrolyzed salt embedded carbon nanotube material to obtain the metal oxide embedded carbon nanotube nano flexoelectric material. According to the preparation method provided by the invention, the carbon nanotube confinement space is utilized, the preparation of the nanoscale built-in stress gradient flexural dielectric material is realized, the geometric necessary dislocation density is increased by utilizing the size effect, the flexoelectric effect is amplified, and the application of flexoelectricity in the aspects of organic matter catalytic degradation and energy collection is improved.

The invention relates to a method for preparing low-iron quartz sand and high-quality feldspar from lepidolite tailings. The method is characterized by comprising the following steps: (1) grinding pegmatite type lepidolite tailings, and screening to obtain mineral particles with the particle size of less than or equal to 0.35 mm; (2) sequentially carrying out medium magnetic separation, high-intensity magnetic separation and high-intensity magnetic separation on the-0.35 mm minerals to obtain magnetic separation fine sand and magnetic separation tailings; (3) scrubbing the magnetic separation fine sand to obtain desliming fine sand with higher purity; (4) the desliming fine sand is subjected to three-section flotation, the ore pulp concentration of first-section flotation is 35%-40%, H2SO4 serves as a pH adjusting agent, the pH is adjusted to 2-5, and mixed amine serves as a collecting agent of 0.10-0.15 kg / t; the ore pulp concentration of the second-stage flotation is 25%-30%, H2SO4 is used as a pH regulator, the pH is regulated to be 1-3, and an anion and cation collecting agent is 0.10-0.15 kg / t; the ore pulp concentration of the third-section flotation is 25%-30%, H2SO4 is used as a pH regulator, the pH is regulated to 1-3, the use amount of an anion and cation collecting agent is 1.25-2.25 kg / t, and feldspar and quartz fine sand are obtained. The method has the advantages that the prepared quartz fine sand meets the index requirements of quartz for optical glass or photovoltaic glass, and meanwhile, feldspar products for high-whiteness glaze and feldspar products for float glass are obtained.

The invention provides a low-toxicity environment-friendly neodymium-iron-boron magnet surface magnetic material glue removal liquid and a removal process. The removal liquid comprises the following components in parts by mass: 7 parts of dimethyl carbonate and 3 parts of acetone. The removal process comprises the following steps: S1, washing a to-be-treated magnet with deionized water and putting the to-be-treated magnet into a hollow tool basket; s2, removing liquid is added into an ultrasonic cleaning machine, the hollowed-out tool basket containing the to-be-treated magnet is completely immersed into the removing liquid, the ultrasonic cleaning machine is started to conduct degumming cleaning on the to-be-treated magnet to form a treated magnet, the degassing and frequency conversion functions of the ultrasonic cleaning machine are started, the ultrasonic frequency ranges from 35 kHz to 45 kHz, the ultrasonic power ranges from 300 W to 500 W, and the magnet to be treated is obtained; the cleaning time ranges from 15 min to 25 min, and the cleaning temperature ranges from 25 DEG C to 30 DEG C; s3, the treated magnet is washed with deionized water; and S4, drying treatment is conducted on the treated magnet through drying equipment. The degumming device can improve the degumming treatment efficiency.

This invention discloses a method for automatic gyroscope drift compensation in a high-precision optical axis motion control device, belonging to the field of servo turntable control technology. This invention uses a three-axis fiber optic gyroscope mounted on the pitch axis to sense spatial angular velocity. Fiber optic gyroscopes eliminate errors caused by friction from rotating mechanical parts, resulting in high angular velocity measurement accuracy and a wide range of measurable angular velocities. The laser gyroscope used in this invention has a velocity measurement range of ±600° / s and a minimum sensitive angular velocity of less than ±0.001° / s. Fiber optic gyroscopes have a wide operating temperature range, from -50℃ to 60℃, requiring no heating, and exhibit short start-up time and fast system response. This invention proposes a method for automatic gyroscope drift compensation in a high-precision optical axis motion control device, employing a two-stage coarse-fine compensation method to achieve rapid compensation for fiber optic gyroscope drift. It first performs a coarse compensation, followed by up to five (the number of times is configurable) fine compensations. The algorithm is simple and efficient, with short compensation time, and does not consume significant CPU resources for complex calculations, thus improving optical axis stability.

The application discloses a method for constructing S-N bond by electrochemical oxidation of glycosyl mercaptan and amine compound to synthesize glycosyl sulfenamide, and belongs to the technical field of drug intermediate synthesis. The method uses an organic solution containing glycosyl mercaptan, amine compound and electrolyte salt as an electrolyte, places an anode and a cathode in the electrolyte, passes direct current, and performs electrochemical reaction to obtain a glycosyl sulfenamide compound. The method has strong reaction universality, high yield of target product, and is realized by one-step chemical reaction, and has mild reaction conditions and does not need any transition metal catalyst.

The invention discloses a high-frequency surface acoustic wave dimethyl methylphosphonate sensor and a preparation method thereof, and belongs to the technical field of gas sensors. The sensor comprises a piezoelectric substrate, an interdigital transducer arranged on the piezoelectric substrate and a gas sensitive layer formed on the surface of the interdigital transducer, the gas sensitive layer comprises a 11-mercaptoundecanoic acid material layer formed on the surface of the interdigital transducer and a zirconium-based MOF material layer formed on the 11-mercaptoundecanoic acid material layer. The invention also provides a preparation method of the sensor. The 11-mercaptoundecanoic acid and the zirconium-based MOF material layer are modified on the surface of a high-frequency surface acoustic wave device layer by layer through a molecular self-assembly technology. The sensor disclosed by the invention has high sensitivity, quick response and good repeatability on dimethyl methylphosphonate gas, is simple in preparation process and good in repeatability, and has important application value in the field of gas sensing.

The present application relates to modified seaweed residue-based filter membrane and its preparation and application for removing pollutants, wherein industrial waste seaweed residue is used as raw material, and graphene oxide is used as modifier, after mixing seaweed residue and graphene oxide and fully stirring, ZrO2 nanoparticles are biomimetic mineralized on the graphene oxide loaded seaweed residue hybrid, and the functional GO / seaweed residue-ZrO2 hybrid membrane is prepared by vacuum filtration method, the composite membrane has good adsorption and removal performance on fluoride, heavy metal ions and radioactive elements in water body, and the composite membrane also has excellent antibacterial effect.

The application discloses a kind of quick gelation conductive hydrogel and its preparation method and application, the preparation method, including the following steps: diatomite and tannic acid are dissolved in water, stirring preparation tannic acid coated diatomite solution;Zinc chloride is added to the tannic acid coated diatomite solution, stirring is uniform, then acrylic acid and 1-vinyl-3-carboxy imidazole ionic liquid are stirred uniformly;Then initiator and crosslinking agent are added, immediately pour into mould after stirring is uniform, carry out quick gelation reaction in 10~30s, namely obtain.The raw material of hydrogel provided by the application is low in toxicity, high in safety, and the preparation method is very simple, without heating, and the gelation time is very short, suitable for industrial production;The obtained hydrogel has good conductivity, repeated adhesion and low temperature resistance, can be applied as flexible sensor, and has wide application prospect.

The nodular cast iron jacking pipe with the multi-layer composite structure comprises a pipe body, a concrete layer and a protective layer are sequentially arranged on the outer wall of the pipe body from inside to outside, and the protective layer is a continuous compact layer formed through a winding process. The nodular cast iron jacking pipe is high in strength, good in impact resistance and environmental adaptability, capable of effectively resisting various stresses in transportation, construction and extreme use environments and capable of preventing the cracking phenomenon.