9 results about "Dimethylglyoxime" patented technology

The invention belongs to the field of novel functional polymer materials, and discloses a preparation method of a selenium-containing polymer material capable of fixing metal ions, and the preparation method comprises the following steps: S1, adding PTMEG into a round-bottom reaction flask filled with inert gas, and placing the round-bottom reaction flask in an oil bath pan for melting; s2, MDI, dimethylglyoxime, DSe and anhydrous N, N-dimethylacetamide are sequentially added and fully mixed; s3, stannous octoate and CuCl2 are added at the same time; s4, keeping the temperature of the oil bath pan and continuously reacting; s5, after the reaction is finished, a polymer is precipitated out, and secondary cleaning is conducted through methyl alcohol. The preparation method has the advantages that oximido is introduced into a polyurethane molecular structure to fix metal ions, meanwhile, selenium is introduced in a covalent fixation mode, and through double-site introduction of the metal ions and the selenium, the molecular structure of the polyurethane is greatly improved; the NO catalytic release rate of the material can be regulated and controlled, so that the biocompatibility and applicability of the polymer material in a blood environment are improved, and the application scene is further widened.

The application discloses an improved iodine oxidation-dimethylglyoxime spectrophotometry for detecting the content of nickel in steel, which comprises the following steps: obtaining an acidolysis solution by acidolysis of the steel to be detected; then diluting the solution to obtain a mother liquor to be detected; mixing the mother liquor to be detected with an ammonium citrate solution, water, an iodine solution, ammonia water and a dimethylglyoxime solution to obtain a chromogenic solution to be detected; and placing the chromogenic solution to be detected below a critical temperature to perform spectrophotometry to obtain the content of nickel in the steel to be detected. The application controls the adding amount of the ammonium citrate and the dimethylglyoxime in the chromogenic solution to be detected and the chromogenic temperature, so that the stable time of the absorbance of the chromogenic solution to be detected is greater than or equal to 60 minutes, the detection of the content of copper in the steel to be detected is less than or equal to 0.2%, and the probability of the result of the detection of the content of nickel in the steel to be detected (0.10%-50%) exceeding the allowable error of a navigation mark is less than or equal to 5%.

The invention discloses a preparation method and application of a high-elongation-at-break flexible self-healing heat-conducting composite material for a robot. The composite material is prepared by taking polycaprolactone diol, isocyanate, dimethylglyoxime and spherical aluminum oxide as raw materials, constructing a polyurethane matrix with a'dynamic-permanent 'double-crosslinking network structure and regulating and controlling the content of the spherical aluminum oxide. Wherein the permanent cross-linked network provides a rigid framework and high-strength support; a dynamic cross-linked network (composed of hydrogen bonds and dynamic oxime-urethane bonds) endows the material with energy dissipation capability and self-repairing characteristics. The spherical aluminum oxide filler has double functions in the system: the spherical aluminum oxide filler is used as a rigid reinforcing phase to improve the mechanical property; the heat conductivity coefficient is obviously improved as a high-efficiency heat-conducting channel. The composite material has high tensile strength, ultrahigh elongation at break and excellent bendability, and can self-repair damage for multiple times. The method is simple in preparation process and low in cost, and has wide application prospects in the fields of heat dissipation of flexible wearable electronic equipment and the like.

This invention discloses a nickel-cobalt hydrometallurgical recycling process, belonging to the field of hydrometallurgical technology. On one hand, this invention converts magnesium sulfate solution wastewater into magnesium salt solution, replacing sodium hydroxide in saponification with the organic phase, while also saving water in the production line. It also recycles carbon dioxide waste gas, achieving resource conversion and reuse of industrial waste gas. On the other hand, it prepares functional materials to achieve efficient recovery of cobalt and nickel from waste liquid: utilizing Zn... 2+ Coordination activation forms a resin filter membrane with a coordination trap on its surface, which efficiently captures cobalt and nickel ions in waste liquid; a carboxyl-functionalized dimethylglyoxime ligand is pre-synthesized using dimethylglyoxime and bromoacetic acid, and a MOF with a dimethylglyoxime group is directly constructed for chelating Ni. 2+ The prepared adsorption particles undergo secondary adsorption in the waste liquid after passing through the resin, resulting in an extremely high recovery rate of cobalt and nickel ions in the waste liquid. This hydrometallurgical process achieves both recovery and recycling.

The application discloses a kind of reworkable and self-repairing polyurethane solid-solid phase change material and preparation method thereof, comprising: under argon or nitrogen atmosphere, polyethylene glycol is added to reactor for water removal treatment, under certain temperature and stirring speed, diisocyanate is dissolved in solvent and then added to reactor, catalyst is added, and pre-polymer is obtained by reaction;Temperature is adjusted, butanedione oxime and metal compound are dissolved in solvent respectively and then added to reactor, continue to react, pentaerythritol is dissolved in solvent and then added to reactor, and polyurethane solution is obtained by stirring;Polyurethane solution is poured into polytetrafluoroethylene mold, dried in oven, and reworkable and self-repairing polyurethane solid-solid phase change material is obtained.The oxime-urethane bond, metal coordination bond and hydrogen bond are introduced into the polyurethane solid-solid phase change material, and the obtained polyurethane solid-solid phase change material not only has good phase change performance and mechanical properties, but also has reworkability and self-repairing performance.

This application belongs to the technical field of polyurethane compositions, specifically providing a self-healing polyurethane composition and its preparation method. The composition is obtained by mixing the following raw materials in parts by weight: 50-60 parts polycaprolactone diol, 15-20 parts isocyanate, 0.5-2 parts leveling agent, 1-2 parts light stabilizer, 20-30 parts composite solvent, 2-5 parts aliphatic-copper complex crystals, 5-8 parts dimethylglyoxime, and 0.01-0.05 parts catalyst. The aliphatic-copper complex crystals are obtained by crystallization of a mixture of hydrogenated castor oil and a copper complex. The self-healing polyurethane composition coating obtained by this application has the advantages of stain resistance, crack resistance, and resistance to folding and matte finish.

The application relates to a photocatalytic hybrid system based on a cobalt oxime molecular catalyst and application thereof, and belongs to the field of energy materials and catalysis technology. The cobalt oxime catalyst is synthesized by an organic method, and is obtained by adding cobalt chloride hexahydrate and butanedione oxime in an acetone solution, stirring at normal temperature, taking the precipitate, and stirring at normal temperature after adding 4-methoxypyridine to obtain the catalyst. The photocatalytic hybrid system is constructed by taking semiconductor powder bismuth vanadate as an optical component, sodium persulfate as a sacrificial electron acceptor, and the cobalt oxime molecular catalyst as a water oxidation catalyst. In a water solution with pH=7, oxygen is successfully generated after 3h of light irradiation, and the oxygen generation rate is 2099.9 mu mol g ‑1 h ‑1 , which is 2.5 times that of the system without the cobalt oxime. In three-cycle photocatalytic tests, the catalyst shows good stability. The catalyst is simple to synthesize, cobalt is abundant in the earth's crust, and has wide application prospects in the fields of renewable energy production and environmental protection.

This invention provides a method for producing dimethylglyoxime, belonging to the field of compound production technology. The method involves first adding a catalyst to a reaction vessel, then pumping in 2,3-dimethylglyoxime, a solvent, hydrogen peroxide solution, and ammonia to react. The reaction solution is discharged from the reaction vessel outlet and pumped into a stripping tower for distillation separation, yielding the solvent and crude dimethylglyoxime. The crude dimethylglyoxime is then washed and dried in a washing tank to obtain the finished dimethylglyoxime. This invention improves the selectivity of the raw material reaction during the preparation of dimethylglyoxime and enables continuous production, which is beneficial for industrialization and has significant application prospects.

The invention belongs to the field of aqueous zinc ion energy storage devices, and particularly relates to a zinc anode based on an organic molecule adsorption layer and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly coating the surface of a zinc electrode with an organic molecule solution, and carrying out vacuum drying to obtain the zinc anode; the organic molecules are any one or more of dithizone, terephthalonitrile, dimethylglyoxime and phenanthroline. Organic molecules are strongly adsorbed on the surface of a zinc anode through functional groups of the organic molecules, interface modification is performed by establishing a protective layer between a zinc cathode and electrolyte, uniform nucleation sites are provided, zinc ions are guided to be uniformly deposited, dendritic crystal formation is avoided, and therefore the purpose of inhibiting zinc dendritic crystal growth is achieved.