14 results about "Octadecyltrimethylammonium bromide" patented technology

The invention relates to flower-like FeCoNiMnPt high-entropy magnetic alloy powder and a preparation method of the flower-like FeCoNiMnPt high-entropy magnetic alloy powder. According to the technical scheme, the preparation method comprises the following steps: respectively dissolving ferric acetylacetonate, cobalt acetylacetonate, nickel acetylacetonate, manganese acetylacetonate and platinum acetylacetonate in oleylamine at equal concentration, and carrying out ultrasonic dispersion to obtain a solution A; respectively dissolving octadecyl trimethyl ammonium bromide and glucose in the solution A at equal concentration, carrying out ultrasonic dispersion, adding the obtained solution B into a sealed container, putting the sealed container into a high-pressure reaction kettle, putting the high-pressure reaction kettle into a hydrothermal oven, carrying out heat preservation and cooling, and taking out the sealed container; the obtained solution C is subjected to centrifugal treatment, washing, drying and cooling, and magnetic alloy powder is obtained; and placing the crucible filled with the magnetic alloy powder in a tubular atmosphere furnace, preserving heat at 450-650 DEG C, and cooling to obtain the flower-like FeCoNiMnPt high-entropy magnetic alloy powder. The preparation method is simple in process, low in cost and high in production efficiency, and the prepared product is large in specific surface area and high in saturation magnetization.

The invention discloses a two-phase electrolyte, a preparation method thereof and a liquid energy storage battery system, and belongs to the technical field of electrochemical energy storage. According to the invention, a liquid-liquid double-phase electrolyte is composed of a water-phase electrolyte and an organic-phase electrolyte, wherein the organic-phase electrolyte contains a coupling system of 1-(methyl-decyl)-3-methylimidazolium bromide, tris (methyl-decyl) methyl ammonium bromide and (10-octadecyl) alkyl trimethyl ammonium bromide in a molar ratio of (5-7): (2-4): 1. During charging, positive electrode bromide ions are subjected to an oxidation reaction to generate a bromine simple substance, and meanwhile, the bromine simple substance and a coupling system of the quaternary ammonium bromide compound and the bromine complexing agent provided by the invention form a stable polybromine complex product, so that the polybromine complex product is prevented from being migrated into a water-phase electrolyte, and the purpose of improving the stability of the water-phase electrolyte in the absence of a diaphragm is achieved. The self-discharge reaction of bromine is significantly inhibited at a high temperature exceeding the boiling point temperature of bromine, the coulombic efficiency and energy efficiency of the liquid energy storage battery are improved, the system cost is reduced, and the long-term cycle stability of the liquid energy storage battery is improved.

The invention discloses a preparation method of a carboxymethyl cellulose / montmorillonite biomass mulching film material in a magnetic field environment. The preparation method comprises the following steps: loading ferroferric oxide on montmorillonite by using a chemical precipitation method, enhancing the binding force between the ferroferric oxide and the montmorillonite by using a silane coupling agent, and then carrying out an intercalation reaction by using octadecyl trimethyl ammonium bromide to obtain organic modified magnetized montmorillonite; then mixing the organic modified magnetized montmorillonite suspension and a carboxymethyl cellulose solution according to a certain proportion to form a film forming solution, carrying out directional arrangement treatment on montmorillonite in the film forming solution through a magnetic field device, and drying to obtain the biomass mulching film material with excellent barrier properties such as ultraviolet rays and water vapor. The biomass mulching film material prepared by the invention can effectively reduce the damage of ultraviolet rays to crops, has a good moisturizing function, avoids the pollution of traditional plastic mulching films to soil, and is beneficial to green and sustainable development of agriculture.

The application discloses cation modified montmorillonite and a preparation method and application method thereof in defluorination, and belongs to the technical field of modified montmorillonite. The cation modified montmorillonite is hexadecyl trimethyl ammonium bromide and / or octadecyl trimethyl ammonium bromide modified montmorillonite; the application method comprises the following steps: adding the cation modified montmorillonite into a solution of perfluoro and polyfluoro alkyl substances (PFAS), adjusting the pH of the mixed solution to 11-13, and then carrying out hydrothermal reaction at 100-220 DEG C. The cation modified montmorillonite can mineralize PFAS efficiently under mild reaction conditions.

The invention relates to a light, thin and flexible TPU (thermoplastic polyurethane) film which comprises the following components in parts by mass: 100-120 parts of TPU master batch, 30-40 parts of polypropylene, 8-10 parts of inorganic hybrid filler, 1-3 parts of antioxidant and 1-3 parts of dispersing agent, the inorganic hybrid filler comprises intercalated montmorillonite and modified carbon nanotubes, and the montmorillonite raw materials comprise montmorillonite, tetraethoxysilane and a modifier. Tetraethoxysilane is used for pre-expanding, octadecyl trimethyl ammonium bromide is used for intercalation modification of montmorillonite, polypyrrole is used for coating, n-dodecanethiol is used for hydrophobization modification of carbon nanotubes, and the carbon nanotubes are used as a filler of the TPU film raw material, so that the overall tensile strength and durability of the system are effectively improved.

The application discloses a kind of heat-sensitive water-based direct liquid ink and its preparation method, including the following weight percentage of raw materials are made: 78.17% deionized water, 16% humectant, 0.02% filler, 5% microcapsule color paste, 0.1% preservative, 0.5% main dispersant, 0.1% auxiliary dispersant, 0.1% ph regulator, 0.01% thickener.The humectant is glycerol and ethylene glycol, wherein the mass ratio of glycerol and ethylene glycol is 3:1.The filler is acrylic resin;The main dispersant is alkyl ammonium salt;Alkyl ammonium salt is dodecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide or octadecyl trimethyl ammonium bromide.The auxiliary dispersant is anionic surfactant;Anionic surfactant is sodium dodecyl sulfate.By modifying HEC, and at the same time as a suspending agent, help pigments or other solid ingredients evenly suspended in ink, to prevent precipitation and agglomeration.Through its dispersion, it can be ensured that the ink still remains uniform and stable after long-term storage.

The invention provides an MOR molecular sieve and a preparation method and application thereof.The preparation method of the MOR molecular sieve comprises the following steps that a precursor aqueous solution containing an alkali source, an aluminum source and a silicon source is subjected to first-stage crystallization treatment and then subjected to cooling treatment, and an intermediate system with the temperature being 25-40 DEG C is obtained; mixing the intermediate system with an additive, and performing second-stage crystallization treatment to obtain a crystallization system; and carrying out post-treatment including washing treatment and calcining treatment on the crystallization system to obtain the MOR molecular sieve, wherein the additive comprises at least one of octadecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide and dodecyl trimethyl ammonium bromide. According to the preparation method, through segmented crystallization, stable preparation of the small-grain MOR molecular sieve is achieved at low cost, the preparation method is simple, and no waste liquid is discharged.

The invention discloses a method for inducing homogeneous nucleation growth of gold nanowires through shearing force, which comprises the following steps of: introducing oscillation into an aqueous solution of octadecyl trimethyl ammonium bromide or hexadecyl trimethyl ammonium bromide, chloroauric acid and L-ascorbic acid which are uniformly dispersed, so that the gold nanowires with a large quantity of twists, uneven surfaces and average diameter of 39 nm can grow in the solution; the average length of the gold nanowire is 14.32 microns. In addition, gold triangular plates with the side length being 150 nm are further added into the system, and the change of the gold thread yield is judged by counting the number ratio of the gold nanowires to the triangular plates. It is proved that gold threads generated in the solution do not grow out of the triangular plate, that is, the gold threads grow without depending on the triangular plate. The yield of the gold nanowires is regulated and controlled by regulating and controlling the types of ligands, the concentration of a gold triangular plate, the rotating speed, the reaction temperature, the concentration of chloroauric acid, the concentration of L-ascorbic acid and the concentration of C18TAB or C16TAB. The gold nanowire prepared by the method has the advantages of high yield, few impurity particles, mild reaction conditions and no need of expensive instruments, and a new method is provided for synthesizing the gold nanowire.

This invention belongs to the field of oil and gas drilling engineering technology, specifically relating to a drilling fluid anti-collapse lubricant and its preparation method. The method includes: firstly, heating deionized water, adding polyanionic cellulose, modified starch, and sulfonated asphalt, and stirring to form a gel; then sequentially adding octadecyltrimethylammonium bromide intercalated α-zirconium phosphate-titanium dioxide composite nanosheets and ethylmethylimidazolium tetrafluoroborate hybrid silicotungstic acid-graphene oxide composites, and shearing and dispersing; next, adding lubricant and surfactant for emulsification; finally, adding defoamer and preservative, and cooling to obtain the final product. The anti-collapse lubricant obtained by this invention exhibits excellent temperature and salt resistance, effectively inhibiting the hydration and expansion of shale and reducing drill string friction.

The invention specifically discloses a negative electrode material, a preparation method thereof and a battery using the negative electrode material. The negative electrode material comprises titanium diselenide, long-chain alkyl ammonium bromide and a carbon material. The long-chain alkyl ammonium bromide comprises at least one of hexadecyl trimethyl ammonium bromide, octadecyl trimethyl ammonium bromide and dodecyl trimethyl ammonium bromide; the carbon material comprises at least one of carbon spheres and carbon nanotubes. The anode material disclosed by the invention is excellent in electrochemical performance and cycle performance.

The invention discloses cation modified montmorillonite, a preparation method thereof and an application method of the cation modified montmorillonite in defluorination. Belongs to the technical field of modified montmorillonite. The cation modified montmorillonite is cetyl trimethyl ammonium bromide and / or octadecyl trimethyl ammonium bromide modified montmorillonite; the application method comprises the following steps: adding the cation modified montmorillonite into a solution of perfluoro and polyfluoroalkyl substances (PFAS), adjusting the pH value of the mixed solution to 11-13, and carrying out a hydrothermal reaction at 100-220 DEG C. According to the invention, PFAS can be efficiently mineralized through the montmorillonite modified by cations under mild reaction conditions.

A catalyst for the carbonylation of methanol to acetic acid, its preparation method, and its application are disclosed. The method comprises: 1) mixing a silicon source, an aluminum source, and an alkaline source to form a sol; 2) mixing a quaternary ammonium salt and an organic base, adding the mixture to the sol prepared in step 1), followed by aging, crystallization, filtration, washing, drying, and calcination; 3) dispersing the molecular sieve prepared in step 2) in an NH4Cl aqueous solution for ammonium exchange, followed by drying and calcination; 4) subjecting the molecular sieve prepared in step 3) to pyridine adsorption to obtain the catalyst. The quaternary ammonium salt in step 2) is one or more of octaalkyltrimethylammonium bromide, decaalkyltrimethylammonium bromide, dodecyltrimethylammonium bromide, tetradecyltrimethylammonium bromide, hexadecyltrimethylammonium bromide, and octadecyltrimethylammonium bromide. The nano-sized mordenite zeolite prepared by this invention can improve the diffusion of methanol and carbon monoxide, thereby enhancing the activity and selectivity of methanol carbonylation to acetic acid.

The invention provides an antibacterial polyester fiber and a preparation method thereof. The preparation method comprises the following steps: immersing polyester fibers into an antibacterial modification treatment solution, reacting, washing and drying to obtain the antibacterial polyester fibers, wherein the antibacterial modification treatment liquid is a mixed liquid of alkali, a cationic phase transfer catalyst and water, and the cationic phase transfer catalyst comprises a first component, a second component and a third component; the first component is selected from tetradecyl dimethyl ammonium oxide or tetradecyl trimethyl ammonium bromide; the second component is selected from at least one of octadecyl trimethyl ammonium bromide, octadecyl trimethyl ammonium chloride or octadecyl dimethyl hydroxyethyl ammonium nitrate; and the third component is selected from hexadecyl trimethyl ammonium bromide or hexadecyl dimethyl ammonium chloride. The preparation method provided by the invention avoids the use of metal ions harmful to human bodies, simplifies the preparation process of the antibacterial polyester fiber, reduces the production cost, and effectively improves the stability and antibacterial effect of the antibacterial polyester fiber.

The application relates to a flower-shaped FeCoNiMnPt high-entropy magnetic alloy powder and a preparation method thereof. The technical scheme is as follows: acetylacetone iron, acetylacetone cobalt, acetylacetone nickel, acetylacetone manganese and acetylacetone platinum are respectively dissolved in oleylamine at equal concentrations, ultrasonic dispersion is carried out, and a solution A is obtained; octadecyl trimethyl ammonium bromide and glucose are respectively dissolved in the solution A at equal concentrations, ultrasonic dispersion is carried out, the obtained solution B is added into a sealed container, the sealed container is placed into a high-pressure reaction kettle, then is placed into a hydrothermal oven, heat preservation is carried out, cooling is carried out, and the sealed container is taken out; the obtained solution C is subjected to centrifugal treatment, washing, drying, cooling, and the magnetic alloy powder is obtained; the crucible containing the magnetic alloy powder is placed into a tube type atmosphere furnace, heat preservation is carried out at 450-650 DEG C, cooling is carried out, and the flower-shaped FeCoNiMnPt high-entropy magnetic alloy powder is prepared. The application has the advantages of simple process, low cost, high production efficiency, large specific surface area of the prepared product and high saturation magnetization.