12results about How to "Low electronegativity" patented technology

The invention belongs to the technical field of lithium ion batteries, and discloses a polycarbonate copolymer solid electrolyte with a sulfur-containing main chain and a preparation method thereof. The polycarbonate copolymer with the sulfur-containing main chain is obtained by catalyzing polymerization of carbon dioxide, epoxide and episulfide by using a cheap, easily available, simple and efficient nonmetal Lewis acid and an organic amine / organic ammonium salt / organic phosphorus bi-component catalytic system, and the copolymer has excellent mechanical properties, thermal stability and chemical stability. Uniformly mixing the copolymer, a lithium salt and a plasticizer in a solvent to obtain an electrolyte solution; and preparing a membrane from the electrolyte solution on a porous support material, and carrying out vacuum drying to obtain the solid electrolyte. The room-temperature ionic conductivity of the solid electrolyte is 3.4 * 10 <-7 >-7.2 * 10 <-4 > S / cm, and the solid electrolyte has an electrochemical oxidation window of 4.5 V-5. 5V. The solid electrolyte shows excellent cycle performance and interface stability when being used for the lithium ion battery, and can effectively inhibit the growth of negative electrode lithium dendrites.

The invention discloses a silver-based tin oxide electric contact material and a preparation method thereof, and relates to the technical field of electric contact materials. When the silver-based tin oxide electric contact material is prepared, firstly, a high-temperature solid-phase method is used for doping lithium and cerium to prepare doped tin oxide powder; stannic chloride and copper nitrate are prepared into a fiber membrane through electrostatic spinning, meanwhile, titanium dioxide is grown in situ through nano spraying, and doped stannic oxide fibers are prepared after calcination; the doped tin oxide powder, doped tin oxide fibers and silver powder are subjected to high-energy ball milling and powder mixing and then annealed, and silver-based tin oxide composite powder is obtained; the silver-based tin oxide composite powder is subjected to pre-pressing forming and then subjected to vacuum discharge plasma sintering, and the silver-based tin oxide electric contact material is prepared. The prepared silver-based tin oxide electric contact material has the advantages of being low in resistivity, high in fusion welding resistance, good in arc erosion resistance and easy to machine and shape.

The invention discloses a collophanite gravity-flotation combined beneficiation backwater utilization method, which comprises the following steps: carrying out ore grinding and grading on collophanite, introducing into a reverse flotation magnesium removal process to obtain magnesium removal concentrate a and magnesium removal tailings b, carrying out gravity concentration on the magnesium removal concentrate a to obtain gravity concentration concentrate c and gravity concentration tailings d, and carrying out gravity concentration reverse flotation dealumination process on the gravity concentration concentrate c to obtain phosphate concentrate e and tailings f; and the direct utilization of the backwater refers to collecting the magnesium-removed tailings b, the phosphate concentrate e, the tailings f and the phosphate concentrate g, respectively thickening and filtering to obtain the backwater, feeding the backwater into a No.1 backwater pool, and directly returning the backwater to the processes of ore grinding, reverse flotation magnesium removal, reselection, reconcentration and reverse flotation dealumination for reuse. According to the method for utilizing the collophanite gravity-flotation combined mineral separation backwater, a process capable of reducing the treatment and utilization amount in the utilization of the separation backwater of the collophanite and impurities magnesium and aluminum contained in the collophanite is found, so that the backwater recycling in the whole process is realized, and the separation index of removing the impurities magnesium and aluminum from the collophanite is not influenced.

The invention belongs to the technical field of floor coatings, and particularly relates to a solvent-free antibacterial floor coating and a preparation method thereof. The solvent-free antibacterial terrace coating provided by the invention comprises a component A and a component B. The preparation method comprises the step of uniformly mixing the component A and the component B according to the mass ratio of (2.5-4): 1, so that the solvent-free antibacterial terrace coating can be used. The component A comprises the following components in parts by mass: 60-75 parts of polyol; 20-40 parts by mass of pigment and filler; and 4-8 parts by mass of an auxiliary agent. The component B is an isocyanate-terminated prepolymer containing an antibacterial group, and the component B is prepared by the following steps: placing dehydrated polyol and a catalyst dibutyltin dilaurate in a reaction container, adding isophorone diisocyanate and a quaternary phosphonium salt compound in a nitrogen protective atmosphere, reacting for 1 hour, and then adding dimethylolpropionic acid to obtain the component B. The floor coating prepared by the invention is high in solid content, low in VOC (volatile organic compound) emission, environment-friendly and long-acting in antibacterial property.

This invention relates to a volatile organic compound (VOC) adsorbent material and its preparation method. The method involves first modifying a 5A molecular sieve with lithium, followed by vanadium modification to obtain a Li-V-5A adsorbent material. Based on the total mass of the adsorbent material, the Li content is 0.8%–4.5%, and the V content is 0.2%–1%. The adsorbent material obtained by this invention, using a 5A molecular sieve as a matrix and modified to obtain the Li-V-5A adsorbent material, has advantages such as good adsorption effect on low-carbon hydrocarbons and strong resistance to sulfur poisoning, especially high adsorption and removal rate of ethane.

The invention relates to a dodecaurea cage type molecule as well as a preparation method and application thereof, and belongs to the technical field of chemical synthesis and pharmaceutical preparations. The molecule is non-toxic and neutral, the ureido part in the molecule has a plurality of hydrogen bond donors and acceptors, and the molecule has a three-dimensional cavity capable of completely coating a bottom object and can simulate protein binding sites and functions. An organic ammonium sulfate salt is used as a template, and a tripodal triurea precursor based on N bridging reacts with diisocyanate or dicarbamate to obtain a dodecaurea molecular cage. The molecule can be used as a universal tool to chelate different types of phosphate / phosphonate drugs through hydrogen bonds, so that the electronegativity of the phosphate / phosphonate drugs is reduced, the lipid solubility of the phosphate / phosphonate drugs is improved, and the membrane transport efficiency of the phosphate / phosphonate drugs is improved.

The invention belongs to the technical field of heterocyclic compounds, and particularly relates to a Kv7 potassium ion channel opener as well as a preparation method and application thereof. The method comprises the following steps: adding a compound 1, a compound 2 and triethylamine into ethyl acetate, and carrying out a first reaction to obtain a reaction solution; performing extraction, water washing, drying and vacuum concentration on the reaction liquid, and then adding the reaction liquid into a mixed solution of a sodium hydroxide aqueous solution and isopropanol to perform a second reaction to obtain a compound 3; adding the compound 3, a catalyst and NH4HCO2 into the mixed solvent, and carrying out amination reaction to obtain a compound 4; and adding the compound 4, the compound 5 and triethylamine into ethyl acetate for reaction to obtain the Kv7 potassium ion channel opener. The metabolic stability and the structural rigidity are improved.

The application relates to a preparation method of a sodium ion battery positive plate, and belongs to the technical field of new energy batteries. The specific scheme comprises the following steps: step one, uniformly dispersing Prussian blue positive materials and organic solvents to obtain slurry A; the organic solvents comprise a combination of one or more of N-methyl pyrrolidone, polyvinyl pyrrolidone and nitriles; step two, adding a binder into the slurry A and uniformly stirring to obtain slurry B; step three, adding a conductive agent into the slurry B and uniformly stirring to obtain slurry C; removing bubbles from the slurry C and adjusting the viscosity to obtain slurry D; step four, coating the slurry D on a positive current collector, baking, rolling, cutting and obtaining the sodium ion battery positive plate. The application can prevent subsequent glue liquid from entering Prussian blue cavities, can effectively guarantee the adhesive glue amount attached to the surface of active materials, can prevent positive electrode cold pressing and formation demolding, and can solve the problem of the battery cell manufacturing process.

This invention relates to an iron-iron-phosphorus 3-point electrocatalyst with an asymmetric electronic structure and its application. The catalyst preparation method is as follows: zinc salt and iron salt are uniformly dispersed in a mixed solution of N,N-dimethylformamide and methanol, and 2-methylimidazole is added and uniformly dispersed in the same mixed solution to obtain a pale yellow powder. The pale yellow powder is uniformly dispersed in a methanol solution, and tannic acid solution is added and stirred to obtain a gray-green powder Fe@ZIF-8. Fe@ZIF-8 and p-phenylenediamine are dispersed in a tetrahydrofuran solution, and a phosphorus source and triethylamine are added to obtain polymer-coated Fe@ZIF-8. Fe@ZIF-8 is calcined to obtain a phosphorus-doped iron single-atom catalyst. The phosphorus-doped iron single-atom catalyst is ball-milled with iron salt and phthalocyanine to obtain an iron-iron-phosphorus 3-point electrocatalyst with an asymmetric electronic structure. This catalyst is applied to the air cathode reaction of a zinc-air battery.

This disclosure provides a method for preparing nanoparticles, the method comprising: mixing amino-functionalized polyethylene nanoparticles with nano-metal particles to obtain polyethylene nanoparticles with the nano-metal particles bound to their surface; mixing the polyethylene nanoparticles with the nano-metal particles bound to their surface with triethanolamine, hexadecyltrimethylammonium bromide, and tetraethoxysilane to obtain polyethylene nanoparticles coated with a mesoporous silica shell; and calcining the polyethylene nanoparticles coated with the mesoporous silica shell to obtain calcined particles. This disclosure also provides the nanoparticles prepared by this method and their use in the preparation of surface-enhanced Raman scattering (SERS) detection kits. The nanoparticles of this disclosure further mitigate the "protein crown" effect of SERS-labeled nanoprobes, improving the stability and accuracy of the Raman signal.

The invention belongs to the technical field of glass ceramics, and relates to high-strength high-definition light transmittance nano glass ceramics with silicon yttrium lithium aluminate as well as a preparation method and application of the high-strength high-definition light transmittance nano glass ceramics. The high-strength and high-definition light-transmittance nano glass ceramic containing silicon yttrium lithium aluminate is prepared from a synthetic aluminum-rich feldspar glass or ceramic glass material, and lithium oxide, yttrium oxide, aluminum oxide, silicon yttrium oxide and silicon yttrium lithium aluminate which are determined by Li2O-Y2O3-Al2O3-SiO2 system glass. The nanometer microcrystalline glass with silicon yttrium lithium aluminate is obtained by melting and crystallizing a raw material with silicon dioxide as a chemical component and zirconium oxide micro powder. The prepared nano microcrystalline glass is high in hardness and fracture toughness resistance, has high-definition light transmittance, and is suitable for manufacturing various optical glass, including mobile phone cover panels and back plates, high-end instrument and meter equipment window glass and the like.

The invention discloses a negative hard water corrosion inhibitor and a preparation method thereof. The negative hard water corrosion inhibitor comprises the following raw materials in percentage: 5-15% of polyepoxysuccinic acid, 5-15% of a scale inhibitor dispersant, 5-10% of a zinc salt, 10-40% of an organic carboxylate, 0.1-0.5% of an azole and 10-15% of a synergist, and the balance is water. The synergist is prepared by reacting a hyperbranched amine, cyanuric chloride and a modifier at different temperatures. The synergist contains a quaternary ammonium salt structure. Since the electronegativity of bromide ions is small, the repulsive force between ions is weak, and the synergist can be adsorbed on a metal surface to form an adsorption layer. Meanwhile, the synergist contains a large amount of organic silicon segments and a hyperbranched structure, so that the synergist can form a dense organic silicon film on the metal surface, thereby preventing the metal surface from directly contacting with water. Moreover, a large amount of catechol structures can increase the adsorption of the synergist and the metal surface, thereby avoiding the shedding of the organic silicon film.