78 results about "Didodecyldimethylammonium bromide" patented technology

The invention discloses a short length-diameter ratio gold nanometer rod preparation method. A strong reducing agent of sodium borohydride is added in a hexadecyl trimethyl ammonium bromide surface modifying agent solution to reduce gold acid chloride and obtain a gold seed solution; a mixed fluid of didodecyl dimethyl ammonium bromide, gold acid chloride and silver nitrate is prepared, and an ascorbic acid solution is added thereto for obtaining a growth solution; the seed solution of a certain amount is filled into the growth solution to react for 5 to 12 hours, so as to obtain the short length-diameter ratio gold nanometer rod. The operation of the method is simple, the gold nanometer rod production rat is high, and the size distribution is narrow.

The invention relates to a gas hydrate, in particular to a compound gas hydrate generation accelerant and a preparation method thereof. The accelerant is a mixed solution formed by dissolving nano dispersed particles and a gemini surfactant in water, wherein the nano dispersed particles are nano graphene particles, the purity degree (the mass fraction) of the nano dispersed particles is 99%, and the fineness of the nano dispersed particles ranges from 20 nm to 60 nm; the gemini surfactant adopts dimethylene-1,2-double (dodecyl dimethyl ammonium bromide)-C12-2-122Br-1; by taking the mixed solution as the total amount, in the prepared mixed solution, the concentration of the nano graphene particles is controlled from 0.08% to 1.2%, the concentration of the gemini surfactant is controlled from 0.03% to 0.1%, and the balance is water. The accelerant can be used to enhance the gas hydrate from the two processes of heat transmission and mass transfer in the generation process of the gas hydrate, reduces the induction time for gas hydrate generation, and improves generation efficiency of the gas hydrate; a nanofluid is more stable and has low possibility of coagulation under the compound condition of the nano dispersed particles and the gemini surfactant.

The invention discloses a preparation method of a nickel nanoparticles-loaded multi-wall carbon nanotubes catalytic agent, belonging to the technical field of energy material. The preparation method comprises the steps of acidifying multi-wall carbon nanotubes (MWCNTs) in mixed acid, leading in functional groups, respectively sensitizing and activating the MWCNTs in hydrochloric acid water solution of SnCl2 and PdCl2 to lead in a Pd active site, ultrasonically dispersing nickel salt NiCl2.6H2O and the pretreated MWCNTs in the water solution according to a certain proportion, adding a certain quantity of cetyl trimethyl ammonium bromide (CTAB) to be taken as a complexing agent, complexing Ni2+and an added reducing agent to control the velocity and the steps of the reaction, adjusting a PH value to be a required value, and adding the reducing agent within the time required by the reaction at a certain temperature. The method obtains the nickel nanoparticles which are even in distribution and fine in grain diameters on the surfaces of multi-wall carbon nanotubes.

The invention provides a method for preparing core-shell microgel composite microspheres by adopting a polymerizable surfactant, which comprises the process steps as follows: preparing an oil phase, preparing a homogeneously dispersed oil phase, preparing a water phase, preparing a microgel, preparing a swollen microgel, preparing a porous microgel, preparing a porous microgel containing a polymerizable surfactant acrylamide-propyl-dodecyl-dimethyl-ammonium bromide, and preparing the microgel composite microspheres. The method has the advantages of reasonable design, feasible process, simple operation, reaction under the normal temperature, etc. The microgel composite microspheres prepared by adopting the method is characterized by core-shell structure, larger size which facilitates separation, large specific surface, reversible swelling and deswelling, and has phosphotungstic acid on the surface, thus the core-shell microgel composite microspheres can be popularized and applied in the fields of structural catalyst preparation, rapid enrichment, separation, etc.

The invention discloses a waterproof anti-bacterial polyurethane composite material. Raw materials of the waterproof anti-bacterial polyurethane composite material include polypropylene oxide glycol, hydroxyl-terminated liquid silicone rubber, 1,4-cyclohexane diisocyanate, 1,5-naphthalene diisocyanate, 1,4-butynediol, 1,4-bis(2-hydroxethoxy)benzene, 4,4'-diaminodiphenyl sulphone, 1H,1H,10H,10H-perfluoro-1,10-decanediol, hydroxypropyl trimethoxysilane, dibutyltin dilaurate, methyl methacrylate, benzoyl peroxide, methyl-tri-butanone-oxime silane, polystyrene, polyvinyl chloride, an acrylonitrile-butadiene-styrene copolymer, a rare earth coordination compound and a composite filling, wherein the composite filling comprises oxidized graphene, a carbon nanotube, nanometer titanium dioxide, nanometer zinc oxide, nanometer copper oxide, nanometer carbon fibers and didodecyldimethylammonium bromide. The waterproof anti-bacterial polyurethane compound material provided by the invention is high in intensity, water resistance and bacterium resistance.

The invention discloses a water-based drag reducer and application thereof. The water-based drag reducer comprises the following components in parts per million by weight: 30-200ppm of non-ionic surface active agent fatty alcohol-polyoxyethylene ether, 5-40ppm of defoaming agents or 5-40ppm of organopolysiloxane defoaming agents and 5-30ppm of dodecyl dimethyl ammonium bromide bactericides, wherein the 5-40ppm of defoaming agents or the 5-40ppm of organopolysiloxane defoaming agents are emulsified by using special emulsifiers and taking methyl polysiloxane and nanometer-grade silicon dioxide as main bodies. A method of mechanical kneading with multi-layer fine gauze filtering is adopted for mixed preparation so that the non-ionic surface active agent is dissolved in water in a foamy way; the adding temperature of the drag reducer is 5 DEG C-70 DEG C; when the drag reducer is used in a horizontal pipeline, the energy consumption of a water pump motor is reduced more than 20 percent at the same flow rate; and the increase rate of the water circulating flow rate of the horizontal pipeline using the drag reducer is 10-20 percent. The water-based drag reducer not only changes boundary conditions of the fluid interior and fluid and a pipe wall, but also changes the physical, chemical and mechanical properties of the fluid interior and boundary materials, thereby greatly reducing the resistance of a delivery pipeline and achieving the purpose of electricity saving of the water pump motor; and in addition, the water-based drag reducer and a validation method are scientific, reasonable and practical and open a new way for reducing the energy consumption of a circulating water system.

The invention provides a carrier for introducing genes into liver cells in a targeting mode and a preparation method thereof. The carrier is a compound consisting of lipidosome and apolipoprotein, wherein the lipidosome is prepared from bidodecyl dimethylammonium bromide and dioleoyl phosphatidyl ethanolamine and passes through double-layer coated phospholipids follicle modified by distearoyl phosphatidyl ethanolamine-polyethylene glycol-maleimide; and the apolipoprotein is ApoE. According to the constructed targeting gene carrier, the targeting property of the carrier is improved through the affinity concentration of ligand-receptor, the transfection efficiency and the concentration degree in the liver cells are improved, and the carrier has obvious liver cell targeting property and can serve as artificial membranes and excipients of various treatment agents, so that the curative effect of drugs is enhanced.

The invention discloses a degreasing and deoiling agent for an aluminum surface. The degreasing and deoiling agent is prepared from, by weight, 0.5-1 part of benzotriazole, 5-6 parts of cerous nitrate, 1-2 parts of sodium fluoride, 1.5-2 parts of hydrogen peroxide, 20-24 parts of triethoxyvinylsilane, 1-2 parts of polyving akohol, 1-2 parts of nanometer titania, 2-3 parts of nanometer zirconium dioxide, 5-6 parts of waterborne polyurethane, 0.2-0.3 part of didodecyldimethylammonium bromide, 1-2 parts of clay, 0.06-0.1 part of graphite, 0.05-0.1 part of molybdenum disulfide, 0.1-0.2 part of hydrolytic polymaleic anhydride, 0.4-0.6 part of propanediol butyl ether and 100-130 parts of deionized water. The prepared deoiling agent is simple in process, low in cost, capable of achieving normal-temperature treatment, high in treatment speed and film formation efficiency and capable of meeting industrial production requirements.

The invention discloses a multilayer-shell wormlike mesoporous silica material and a preparation method thereof. The preparation method includes the steps of firstly, sequentially adding cetyltrimethyl ammonium bromide (CTAB) and didodecyldimethyl ammonium bromide (DDAB) into water, stirring for dissolving, adding beta-CD, and stirring to achieve complete dissolving; secondly, adding ammonia water into the solution obtained in the first step, evenly stirring, and adding tetraethyl orthosilicate (TEOS) to obtain suspension; thirdly, continuously performing stirring reaction on the suspension obtained in the second step to obtain a white sediment solution, and performing solvent thermal treatment on the white sediment solution; fourthly, filtering, washing, drying and grinding the white sediment solution after the solvent thermal treatment, and calcining to obtain multilayer-shell wormlike mesoporous silica. The multilayer-shell wormlike mesoporous silica has a multilayer-shell structure with 3-4 layers and large cavities and has evident advantages in fields such as drug controlled release.

The invention relates to a method for preparing an anti-freezing type aqueous film forming foam extinguishing agent. The method comprises: mixing coconut diethanolamide, hydroxyethyl cellulose sodium, amino acid, tetrafluoropropene, aluminum fluoride with ethyl alcohol, performing refluxing reaction for 1-5 hours at the temperature of 50-90 degrees centigrade, then distilling at 50-80 degrees centigrade to remove the ethyl alcohol, adding an extractant into the distillation residues, and mixing and stirring at 30-60 degrees centigrade, filtering the mixture to get the filter liquor, performing reduced pressure distillation on the filter liquor to obtain crystals, adding water into the crystals, mixing and stirring until the crystals dissolves completely, then adding the mixture of dodecyl dimethyl ammonium bromide, lauryl sodium sulfate, sodium laurylsulfate and poly siloxane phosphobetaine ampholytic surfactant, adding antifreeze agent, chelating agent, high molecular surfactant and foam stabilizer, adjusting the PH value of the system, and finally mixing and stirring to obtain the product. The method for preparing an anti-freezing type aqueous film forming foam extinguishing agent provided by the invention has the advantages of low cost and simple preparation process, and can achieve a good anti-freezing effect.

The invention discloses a method for synthesis of microemulsion of strontium molybdate nano light emitting material, comprising the steps of preparing 0.2 mol/L strontium chloride solution and 0.2 mol/L molybdenum source solution, adding mixed solution of the n-butyl alcohol and the surfactant of ethane-di-dodecyl dimethyl ammonium bromide, n-octane and the strontium chloride solution to a container in sequence, supersonically oscillating the container, placing the container in a constant-temperature water bath until the solution in the contain being clear and transparent to obtain strontium chloride microemulsion, preparing molybdenum source microemulsion by using the molybdenum source solution rather than the strontium chloride solution with the similar method, rapidly mixing the strontium chloride microemulsion and the molybdenum source microemulsion, supersonically oscillating the strontium chloride microemulsion and the molybdenum source microemulsion until the strontium chloride microemulsion and the molybdenum source microemulsion being evenly mixing, adding acetone for demulsifing after the reaction of the strontium chloride microemulsion and the molybdenum source microemulsion, absorbing supernatant liquor, and washing the deposited products of reaction with distilled water, acetone and absolute ethyl alcohol in sequence to obtain the strontium molybdate nano emitting material which has the length of 100-600nm and the maximum width of 30-200nm and is in the structure of spindle. The method for synthesizing strontium molybdate nano emitting material microemulsion is easy to obtain the raw materials, is simple, has low cost, ensures that the product of reaction has high purity and controllable morphology and size and is suitable for the scale production.

The invention discloses a preparation and application for a Ni-Co oxide catalyst prepared on the basis of a water-in-oil reverse microemulsion method. The preparation comprises the following steps: preparing a NiCo2O4 precursor, namely preparing a solution A which includes an oil phase, didodecyldimethylammonium bromide (DDAB), a cosurfactant, a nickel salt and a cobalt salt, adding water into the solution A and stirring till being transparent, and then preparing a solution B which includes the oil phase, the didodecyldimethylammonium bromide (DDAB) and the cosurfactant, adding ammonium hydroxide for regulating pH of the solution B to a preset pH and then stirring the solution B till being transparent, uniformly mixing and stirring the solution A and the solution B, adding ammonium hydroxide for keeping pH unchanged and forming a reverse microemulsion, and then heating, cooling, separating and drying, thereby acquiring the NiCo2O4 precursor; and preparing a NiCo2O4 material, namely roasting the NiCo2O4 precursor, thereby acquiring a sea urchin-shaped NiCo2O4 material.

The invention provides a method for preparing SnO2/Ag2O composite particles through an electrostatic spinning method and a prepared product. The method comprises the following steps of dissolving tinsalt, didodecyldimethylammonium bromide, acetamide, silver nitrate and polyvinylpyrrolidone into a mixed solvent of dimethyl formamide and ethanol, stirring till the obtained mixture turns transparent, so as to obtain a precursor spinning solution, after carrying out electrostatic spinning and heat treatment, obtaining a final product. Through designing a novel precursor solution composition, thecrystallization and the growth process of two kinds of oxides in the high temperature sintering process are effectively controlled, the quasi-spherical SnO2/Ag2O composite particles with adjustable size are obtained and has remarkable distinction with one-dimensional materials obtained by a traditional electrostatic spinning method. The method provided by the invention is simple and convenient inoperation in the synthetic process, controllable in product appearance, good in uniformity and high in yield, the prepared SnO2/Ag2O composite material has better application to the field of gas sensitive sensors.

The invention discloses a sound insulation material for automobiles and a preparation method thereof. The sound insulation material comprises the following raw materials in parts by weight: 80-150 parts of raw natural rubber, 3-30 parts of acrylic emulsion, 1-20 parts of styrene-acrylic emulsion, 5-50 pars of polyurethane, 1-25 parts of nano silica, 0.5-12 parts of 8-oxine copper, 0.1-10 parts of oxidant, 1-30 parts of graphite, 1-15 parts of chitosan, 1-20 parts of molecular sieve, 0.2-10 parts of dioctyldilauryltin, 0.2-25 parts of polyethylene glycol, 0.1-5 parts of di-dodecyl dimethyl ammonium bromide, 3-40 parts of mica powder and 1-10 parts of coupling agent. The sound insulation material is obtained by putting smelted raw natural rubber into a mixer, adding other raw materials and performing mixing and extrusion molding. The sound insulation material has a good sound insulation effect; and meanwhile, the sound insulation and sound attenuation functions can be further enhanced by adding the styrene-acrylic emulsion and the polyurethane, so that propagation of noise can be weakened to protect ears. The material prepared by the preparation method is light, and conforms to the trend of lightweight of automobiles.

The invention discloses an easy-to-clean soundproof automobile roof material which is prepared from, by weight, 25-30 parts of wool fiber, 4-5 parts of chitosan, 2-3 parts of titanium dioxide, 0.6-1 part of polyethylene glycol, 100-110 parts of waterborne polyurethane, 0.2-0.4 part of didodecyldimethylammonium bromide, 5-6 parts of clay, 6-7 parts of rock fiber, 3-4 parts of styrene-acrylic emulsion, 4-5 parts of polyacrylonitrile, 5-6 parts of nano zeolite molecular sieve and a proper amount of deionized water. A preparation method is simple, the material has high light resistance, antibacterial performance, soundproof performance and easiness in cleaning; serving as a novel automobile roof material, the problem that existing roof materials are difficult to clean and prone to smudginess is solved, and the material is worthy of popularization.

The invention discloses an automotive interior material with small mass and high impact resistance. The automotive interior material is prepared from, by weight, 25-30 parts of wool fibers, 4-5 parts of chitosan, 2-3 parts of titanium dioxide, 0.6-1 part of polyethylene glycol, 100-110 parts of waterborne polyurethane, 0.2-0.4 part of didodecyldimethylammonium bromide, 5-6 parts of clay, 2-3 parts of hydrogenated castor oil, 5-6 parts of silicon nitride, 4-5 parts of aedelforsite, 5-6 parts of petroleum resin and an appropriate amount of deionized water. The automotive interior material has the advantages that the good shock resistance is achieved, the mass is small, the automobile body weight is decreased, and the economic cost is lowered; in addition, various automotive interior materials can be prepared through injection molding, and the automotive interior material is worthy of popularization.

The invention discloses a multi-layer composite sound insulation material for automobiles. The multi-layer composite sound insulation material for automobiles is prepared from raw materials in parts by weight as follows: 8-10 parts of polymethyl methacrylate, 0.1-5 parts of didodecyldimethylammonium bromide, 3-30 parts of an acrylic emulsion, 8-14 parts of elastic rubber powder, 0.5-12 parts of hydroxyquinoline, 10-12 parts of a waterborne polyurethane emulsion, 0.5-2 parts of latex powder, 30-60 parts of EPDM (ethylene-propylene-diene monomer) rubber, 0.5-2 parts of polypropylene fiber, 0.4-2parts of cellulose ether, 1-10 parts of a coupling agent, 2-10 parts of dioctyldilauryltin, 20-28 parts of expanded vermiculite, 4-6 parts of polystyrene foam plastic, 2-5 parts of mica powder, 12-15parts of chitosan, 6-9 parts of glass fiber cotton and 0.2-0.6 parts of polystyrene foam. The multi-layer composite sound insulation material for automobiles has good sound insulation effect, can reduce harm of noise and has stable performance and small fluctuation, meanwhile, the service life of the material is prolonged, the sound insulation material consists of multiple layers of substances, and thus, the sound insulation property is further improved.

The invention discloses a method for improving the stability of mixed halogen perovskite. The method comprises the steps of mixing and dissolving mixed lead halide and tetra-n-octyl ammonium bromide in toluene to obtain a solution A; dissolving cesium carbonate and rubidium carbonate in n-caprylic acid to obtain a solution B; dissolving formamidine acetate in n-caprylic acid to obtain a solution C; dissolving didodecyl dimethyl ammonium bromide into methylbenzene to obtain a solution D; and mixing the solution B and the solution C, then rapidly adding the mixture into the solution A, adding the solution D under the conditions of room temperature and magnetic stirring, and adding ethyl acetate for extraction to finally obtain the mixed halogen perovskite. By processing according to the method, the obtained mixed halogen perovskite material has relatively good stability and photoelectric property, and has relatively high brightness and stability when being applied to preparation of a perovskite light-emitting device.

The invention discloses an attractive recyclable automobile interior material. The attractive recyclable automobile interior material is prepared from, by weight, 25-30 parts of wool fiber, 4-5 parts of chitosan, 2-3 parts of titanium dioxide, 0.6-1 part of polyethylene glycol, 100-110 parts of waterborne polyurethane, 0.2-0.4 part of didodecyldimethylammonium bromide, 5-6 parts of clay, 6-7 parts of polyvinylidene fluoride, 4-5 parts of resin gelatin powder, 4-5 parts of bone meal, 5-6 parts of scaly aluminum sheets and a proper amount of deionized water. The material recycling efficiency is high, the appearance is attractive and elegant, and the automobile interior material is excellent in performance and long in service life and has the good application prospect.

The invention discloses an environmental-friendly fire-retardant automotive interior imitation leather material which is prepared from, by weight, 25-30 parts of wool fiber, 4-5 parts of chitosan, 2-3 parts of titanium dioxide, 0.6-1.0 parts of polyethylene glycol, 100-110 parts of waterborne polyurethane, 0.2-0.4 part of Didodecyldimethylammonium bromide, 5-6 parts of clay, 6-7 parts of dry linseed oil, 4-5 parts of glycerol, 3-4 parts of glass flake, 5-7 parts of magnesium chloride, and an appropriate amount of deionized water. A method for preparing the automotive interior imitation leather material is simple and controllable. As the automotive interior imitation leather material has good fire-retardant property, hazard of fires to life and property of people is reduced greatly. The automotive interior imitation leather material can be used for producing various automotive interiors and has good application prospect.

The invention discloses an organic modified rectorite/EVA composite foam material and preparation method and application thereof. Organic modification is conducted on rectorite (REC) through dispersions of didodecyldimethylammonium bromide, the organic modified rectorite (OREC) is obtained, and an OREC/EVA composite foam material is obtained by inserting EVA macromolecular chains into an OREC slice layer through a melt intercalation layer. Compared with a traditional EVA foam material, the density of the material is lowered by 12.1% to 34.8%, and the tear strength can still be improved by 10% to 40.5%, so that the foaming material is light in mass and high in strength and has remarkable social and economic benefits.