67results about How to "Increased electron cloud density" patented technology

The invention relates to a preparation method of a nitrogen-doped hollow carbon ball loaded palladium-based catalyst, which comprises the following steps of: dispersing o-phenylenediamine in a solvent for being stirred at a low temperature, adding an initiator for reacting for 12-24h, then extracting and filtering, and drying in vacuum to obtain a poly(o-phenylenediamine) hollow ball; pyrolyzing an o-phenylenediamine polymer at a high temperature for 2-6h under the protection of an inert gas to obtain a nitrogen-doped hollow carbon ball; and dispersing the nitrogen-doped hollow carbon ball into water, adding a chloropalladic acid solution for ultrasonic treatment, adding a reducing agent for ultrasonic treatment, extracting and filtering after the reaction is completed, and drying in vacuum to obtain the nitrogen-doped hollow carbon ball loaded palladium-based catalyst. The nitrogen-doped hollow carbon ball loaded palladium-based catalyst prepared by adopting the preparation method has the nitrogen content of 10.4-22.4wt%, has the advantages of excellent oxidization reaction catalysis property to alcohol, stable performance, low preparation cost and simple preparation process, and is a novel high-performance catalyst for a low-temperature direct alcohol fuel cell anode.

The invention provides propenyl phenoxy compounds with a three-branch aromatic structure and a preparation method thereof, and a bismaleimide resin modified by the propenyl phenoxy compounds, relating to the field of thermosetting resins and adhesives for high-temperature-resistant composite materials. The invention aims to solve the problems of higher curing temperature and higher after-treatment temperature in the existing bismaleimide resin and the problem of poor long-time thermal aging resistance of the cured resin at high temperature. The structural general formula is disclosed in the specification. The preparation method comprises the following steps: adding trifunctional fluoro ketone, allyl phenol and a catalyst into a solvent, heating to react under reflux, filtering, cooling, precipitating, washing with water and baking. The bismaleimide resin modified by the propenyl phenoxy compounds is prepared from bismaleimide, propenyl phenoxy compounds with three-branch aromatic structure, and diallylphenyl compounds. The invention mainly discloses a propenyl phenoxy compounds with three-branch aromatic structure and a preparation method thereof, and a bismaleimide resin modified by the propenyl phenoxy compounds.

The invention discloses a sulfide catalyst with palladium on nitrogen doped mesoporous carbon, and application of the sulfide catalyst. The sulfide catalyst is prepared through the following steps: uniformly mixing mesoporous carbon with a nitrogen-containing compound to obtain nitrogen doped mesoporous carbon; enabling the obtained nitrogen doped mesoporous carbon to be made into seriflux; slowly dropwise adding a soluble palladium-containing solution according to the palladium loading capacity; performing thorough uniform stirring; adding an alkaline solution to regulate the pH value of the solution; lowering the temperature to room temperature; performing filtering to obtain a filter cake I and filter residues; performing washing until the filter residues are neutral; enabling the filter cakes I to be made into seriflux; dropwise adding a liquid-phase reduction agent; performing stirring; performing filtering to obtain a filter cake II; washing the filter cake II until the filter cake II is neutral; performing drying. Under inert atmosphere, high-temperature sulfidation is performed on the catalyst with palladium on nitrogen doped mesoporous carbon by adopting a sulphur-containing substance to obtain the sulfide catalyst with palladium on nitrogen doped mesoporous carbon. The sulfide catalyst with palladium on nitrogen doped mesoporous carbon, which is disclosed by the invention, is used for synthesizing sulfo-arylamine through catalytic hydrogenation.

The invention discloses a thioureido modified imidazoline derivative corrosion inhibitor, and the general molecular formula is shown in the description, wherein R is a branched chain with thioureido.The invention provides the thioureido modified imidazoline corrosion inhibitor as a lubricant additive, the phenylboronic acid in the additive is not esterified to borate, so that the problem of poorhydrolytic stability of the borate does not exist, the thioureido modified imidazoline derivative corrosion inhibitor is excellent in hydrolytic stability, and the defect of easiness in hydrolysis ofthe traditional borate additive is well overcome.

The invention relates to a low-copper and antibiotic-free composite premix for pigs. Each kilogram of the composite premixed feed comprises 3.38-3.63 grams of composite vitamins, 19-42 grams of composite trace elements, 2.5-10.5 grams of composite enzyme for the pigs, 4.5-15.75 grams of choline chloride, 50-125 grams of lysine, 25-94.5 grams of a mildew adsorbent, 19-26.25 grams of rice husk powder, 3.95-4.05 grams of ethoxy quinoline, 1.2-1.8 grams of phytase, 30-45 grams of edible salt, 50-70 grams of limestone powder, 55-75 grams of calcium hydrogen phosphate, 3.8-4.2 grams of aspartame, 0.95-1.05 grams of fragrance substances, 1.5-2.5 grams of chitosan oligosaccharide, 1.5-2.5 grams of green tea powder and 1.5 grams of yeast selenium. The feed disclosed by the invention is not added with antibiotics, and the using amount of copper is greatly reduced, so that organic matters such as dung in a pig farm are easier to degrade or ferment; on the premise that the environment is protected, safety antibiotic-free pork is produced, and the quality and the flavor of the pork are improved.

The invention relates to the field of batteries, and discloses a PEO film, a preparation method thereof and a solid-state battery. The molecular structure of the PEO film comprises a structural unit B, and the structural unit B comprises -CH = CH-O-. By utilizing the PEO film, the problem that the existing PEO film cannot give consideration to the conductivity, the contact performance with the positive electrode and the negative electrode and the self-stability can be solved, and the purpose of improving the conductivity and the self-stability of the PEO film is achieved.

The invention discloses a purple fluorescent material containing tertiary butyl fluorene and a preparation method thereof. The fluorescent material is characterized in that it is a fluorene organic compound with a molecular formula C37H42; the fluorescent material is synthesized by mixing and reacting 2,7-dibromo-9,9-diethyl fluorene, 4-tert butyl benzoboric acid, tetrakis(triphenylphosphine)palladium and potassium carbonate according to a certain proportion; and the synthesis has simple steps and reaches yield of 60%-92%. Tert butyl benzoboric acid and fluorene are subjected to a cross-coupling reaction to prepare the organic compound with fluorescence properties; and the conjugated big pi bond rich in electrons is conducive to electron transition and energy transfer, so that the compound has good photoelectric activity namely high luminous efficiency, and has potential application prospect.

The invention discloses an acrylate pressure-sensitive adhesive, a preparation method thereof and a protective film. The preparation method comprises the following steps: (1) mixing an acrylate hard monomer, an acrylate soft monomer, an acrylate functional monomer and a first type of photoinitiator, and irradiating under an ultraviolet light source to obtain an acrylate prepolymer; and (2) adding a diluting monomer and a second type of photoinitiator into the acrylate prepolymer to obtain an acrylate adhesive precursor; and adding thienopyrrole molecules into the acrylate adhesive precursor, and mixing to obtain the acrylate pressure-sensitive adhesive. The thienopyrrole molecules are creatively added into the acrylate prepolymer, the thienopyrrole molecules are used for doping the acrylate pressure-sensitive adhesive, free radicals generated by light, heat, radiation and the like can be effectively eliminated, chain reaction is prevented, the oxidation resistance of the UV pressure-sensitive adhesive is improved, and the cost is low. The whole preparation process is efficient, energy-saving and pollution-free.

The invention discloses a preparation method of a carbon nano tube modified electrode used for detecting melamine, and belongs to the technical field of electrochemiluminescence detection. The method comprises the following steps of: dispersing a carbon nano tube into solvents such as dimethyl formamide (DMF), tetrahydrofuran, methanol, ethanol, water and the like; mixing the solution of the carbon nano tube and adhesives such as chitosan, Nafion, polyvinyl alcohol and the like; uniformly dispersing the mixture and then coating the mixture on the surface of an electrode to prepare the carbon nano tube modified electrode; and airing the prepared carbon nano tube modified electrode for later use. The electrode has the advantages of capability of detecting the melamine more effectively, lowest detection limit of 10 to 13mol / L, high detection sensitivity and repeatability and suitability for the detection of all materials containing the melamine and all electrochemiluminescence detection devices.

The invention provides propenyl phenoxy compounds with a three-branch aromatic structure and a preparation method thereof, and a bismaleimide resin modified by the propenyl phenoxy compounds, relating to the field of thermosetting resins and adhesives for high-temperature-resistant composite materials. The invention aims to solve the problems of higher curing temperature and higher after-treatment temperature in the existing bismaleimide resin and the problem of poor long-time thermal aging resistance of the cured resin at high temperature. The structural general formula is disclosed in the specification. The preparation method comprises the following steps: adding trifunctional fluoro ketone, allyl phenol and a catalyst into a solvent, heating to react under reflux, filtering, cooling, precipitating, washing with water and baking. The bismaleimide resin modified by the propenyl phenoxy compounds is prepared from bismaleimide, propenyl phenoxy compounds with three-branch aromatic structure, and diallylphenyl compounds. The invention mainly discloses a propenyl phenoxy compounds with three-branch aromatic structure and a preparation method thereof, and a bismaleimide resin modified by the propenyl phenoxy compounds.

The invention discloses a thioureido modified imidazoline derivative corrosion inhibitor, and the general molecular formula is shown in the description, wherein R is a branched chain with thioureido.The invention provides the thioureido modified imidazoline corrosion inhibitor as a lubricant additive, the phenylboronic acid in the additive is not esterified to borate, so that the problem of poorhydrolytic stability of the borate does not exist, the thioureido modified imidazoline derivative corrosion inhibitor is excellent in hydrolytic stability, and the defect of easiness in hydrolysis ofthe traditional borate additive is well overcome.

The invention discloses a high-strength polyolefin composite material and a preparation method thereof. The weight percentages of its main components are: polyolefin: 93-99.7%, fullerene: 0.2-5%, and catalyst: 0.1-2%. The present invention utilizes the characteristics that fullerene is easy to carry out free radical addition reaction, adopts a catalyst with strong Lewis acidity, catalyzes macromolecular chain scission reaction, thereby forms macromolecular free radical, and connects with fullerene through free radical addition reaction, without It is necessary to carry out surface treatment on the fullerene in advance, which will not damage the structure of the fullerene itself, and can obtain organic fullerene with high structure retention.