63results about How to "Stable dispersed state" patented technology

The invention relates to a combined reagent for reverse flotation of microgranular iron ore magnetic concentrate and an application method thereof, and belongs to the technical field of mineral processing. In the process of reverse flotation of the microgranular iron ore magnetic concentrate, the combined reagent comprises, by flotation feed ore dry basis weight, 900-1600 g/t of sodium hydroxide as pH regulators, 50-250 g/t of citric acid as dispersing agents, 1100-1550 g/t of causticizing corn starch as iron ore inhibitors, 750-1000 g/t of calcium oxide of quartz or silicate activating agents and 1100-1600 g/t of fatty acid type collecting agents. The magnetic concentrate is obtained through magnetic separation after iron ore is smashed and levigated; the obtained magnetic concentrate is subjected to reverse flotation; the combined reagent is applied to the reverse flotation process. According to the combined reagent, the problem that as microgranular grains are gathered or cover the microgranular iron ore magnetic concentrate, the reverse flotation concentration index is low is effectively solved.

The invention relates to hydroxyapatite composite nanoparticles, which comprise hydroxyapatite of which mass friction is 95 to 99.5 percent and cellulose with the mass friction of between 0.5 and 5 percent, wherein the appearance of the hydroxyapatite composite nanoparticles is a needle of which the length is between 50 and 310 nanometers and the width is between 3 and 30 nanometers. A method for preparing the hydroxyapatite composite nanoparticles comprises the following technological steps: (1) taking a metallic soluble salt aqueous solution or an ammonium salt aqueous solution as a solvent to dissolve the cellulose at a temperature of between 60 and 100 DEG C; (2) adding a calcium salt aqueous solution and a phosphate aqueous solution into a cellulose-salt solution after the cellulose-salt solution prepared in the step (1) is cooled to the room temperature, controlling the mol ratio of Ca to P of a reaction system is 1.2-2.0:1, subsequently adjusting the pH value of the reaction system, stopping stirring when the pH value is stably between 10 and 12, and keeping the obtained solution stand and performing aging for at least 48 hours; and (3) collecting and drying products. The composite particles have stable dispersity in an aqueous-phase medium, and can be taken as a fluorescent molecular carrier.

The present method of fluorine-contained acrylic ester copolymer stable emulsion includes the following steps: in the container equipped with stirrer, reflux condenser tube, N2 gas protection and charging device adding anionic/non-ionic composite emulsifier, then placing the water, polymerization monomer, acetone, chain transfer agent and initiator into said container, severaly stirring for 0.5-2 hr at normal temperature to obtain uniform pre-emulsion; dividing said pre-emulsion into two portions, heating one-third of the pre-emulsion to 55 deg.C-75 deg.C ioinitiate polymerization reaction, after the reaction liquor produces blue light, drop-adding residual pre-emulsion, drop-adding time is 1.5h-2.5h, after the drop additionis completed, adding residual initiator, heat-insulating reaction for 2-6 hr, stirring and cooling to room temperature so as to obtain the invented product.

The invention relates to an environment-friendly waterborne aerosol paint and a preparation method thereof. The environment-friendly waterborne aerosol paint contains the following components in parts by mass: 35-80 parts of waterborne resin, 0.01-10 parts of hyper-dispersant, 1-20 parts of pigment, 0.1-2 parts of defoaming agents, 10-40 parts of cosolvent and 10-50 parts of propellant. The environment-friendly waterborne aerosol paint adopts the special waterborne resin and has low VOC content, small toxicity and less pollution to the atmosphere. In addition, the environment-friendly waterborne aerosol paint is convenient to carry and simple in operation by adopting an aerosol package, has all the advantages of a solvent based aerosol paint and is safer and more environment-friendly.

Nickel sulfide in low-grade ores is mainly recycled by a flotation method, but the defect is that the content of MgO in concentrate is high. As magnesium-containing minerals are high in smelting point and poor in mobility, when the content of MgO in concentrate is higher than 6.5%, adverse effects such as furnace body nodulation and furnace body corrosion are brought to a follow-up novel flash smelting process of nickel. In order to solve a problem that the content of magnesium in concentrate is high during separating of magnesium-nickel containing minerals, the invention provides a method for lowering the content of magnesium in pentlandite concentrate. The method comprises the following steps: adding surface conditioning agents such as sodium hexametaphosphate into the pentlandite concentrate, and uniformly dispersing ore pulp by stirring; then, adding magnetic seeds and a surfactant, and stirring to ensure that the magnetic seeds and the pentlandite concentrate generate adhesion agglomeration; and performing magnetic separation, thereby obtaining the pentlandite concentrate with the content of magnesium being lower than 6.5% (in terms of MgO). The method disclosed by the invention has the advantages of being good in pentlandite separation selectivity, environmentally friendly, low in energy consumption, easy to operate, high in efficiency, and the like, and solves a problem that the content of magnesium in nickel concentrate is high.

The invention belongs to the technical field of science, technology and environmental protection, and particularly relates to a stable tourmaline slurry and a preparation method thereof. The preparation method of the tourmaline slurry comprises the following steps: uniformly stirring 1-2 parts of tourmaline, 80-100 parts of an alcohol-water mixture, 0.1-1 part of nanocellulose, 0.5-1.5 parts of silicon oxide, 10-20 parts of a menthol solution and 6-8 parts of an essence solvent; then, putting in a planetary ball-milling tank; and ball-milling to prepare a substance which is the stable tourmaline slurry. The stable tourmaline slurry developed in the invention can be used for interior wall decoration materials of buildings, overcomes shortcomings of an electro-negative oxygen ion generator,utilizes a function of emitting negative oxygen ions of tourmaline to increase the content of indoor negative oxygen ions, not only is simple in construction, but also improves the efficiency of releasing the negative oxygen ions of the tourmaline.

The invention discloses a method for preparing a heat-resistant liquid-holding lithium battery diaphragm and belongs to the technical field of lithium battery preparation. The battery diaphragm is mainly composed of aluminium oxide and silicon dioxide, the melting points of which are both above 1000 DEG C, the produced heat and the increased temperature are low during battery charging and discharging and the pore structure of the battery diaphragm is not influenced by high temperature expansion, so that the battery diaphragm has strong heat resistance; a shorter channel can be provided for ionconduction and the ion resistance is reduced by utilizing an aluminium oxide membrane with high porosity and a through-pore structure in the lithium battery diaphragm, so that the electrochemical performance is improved; and calcium lignosulfonate and acrylamide are grafted to obtain a graft copolymer and the graft copolymer is modified by dimethylamine and formaldehyde and reacted with N-vinyl pyrrolidone to obtain an amphoteric graft copolymer which can serve as an organic hygroscopic material to improve the wettability of the battery diaphragm to an electrolyte, so that the liquid absorption rate and the liquid-holding rate of a lithium battery are increased; and therefore, the lithium battery diaphragm has a broad application prospect.

The present invention provides a pigment disperse combination, a coloring photosensitive combination, a color filter, a liquid crystal display element and a solid camera shooting element; the pigmentdisperse combination is capable of dispersing minute pigment in a manner of one particle, has an excellent disperse stability and may be formed coloring tunica with an excellent contrast grade; the coloring photosensitive combination contains the pigment disperse combination, has an excellent curing sensitivity, and may be formed high strength coloring curing membrane with an excellent contrast grade. The pigment disperse combination of the invention is characterized in that the pigment disperse combination contains (a) a high molecular compound, (b) a pigment and (c) an organic solvent, the high molecular compound contains at least one repetitive unit of repetitive units represented by formula (I) and formula (II), in the formula (I) and (II), R<1>-R<6> represent hydrogen atom and the like, X<1> and X<2> represent -CO- and the like, L<1> and L<2> represent two-valency organic linking groups and the like, Y<1> represents an oxygen atom and the like, Y<2> represents -C(=O)O- and the like, Z<1> and Z<2> represent groups containing a C-C double bond, m and n represent integers from 2 to 8, and p and q represent integers from 1 to 100.

The invention relates to a ceramic slurry high-solid content promoter and a preparation method thereof. The preparation method comprises the following steps of 1, orderly adding water, a functional monomer and a part of an inorganic chain transfer agent into a mixer, mixing, and heating to a temperature of 70 to 80 DEG C with stirring to obtain a mixed solution I, 2, mixing an unsaturated carboxylic acid monomer, the functional monomer, the rest of the inorganic chain transfer agent and water into mixed monomers, and dissolving an initiator in water to obtain an initiator solution, 3, dropwisely adding the mixed monomers and the initiator solution into the mixed solution I in parallel, and after dropwise addition, carrying out heat preservation for 2 to 4 hours to obtain a mixed solution II, and 4, cooling the mixed solution II to a temperature of 40 to 50 DEG C, dropwisely adding a sodium hydroxide solution having a mass concentration of 30% into the mixed solution II until a PH value of the mixed solution II is in a range of 6 to 8, after dropwise addition, carrying out heat preservation for 0.5 to 1 hour, cooling, filtering and carrying out emptying to obtain the ceramic slurry high-solid content promoter. In a ceramic preparation technology, through utilization of the ceramic slurry high-solid content promoter obtained by the preparation method, ceramic blank strength and ball milling effects are improved.

The invention discloses a process for extracting nano silicon oxide in natural quartz sand and painting thereof. The process comprises the following extraction steps: 1, washing the quartz sand by water to remove soil; 2, washing the quartz sand by acid to remove iron impurity to obtain more than 99 percent high-purity silicon oxide quartz sand; 3, crushing the quartz sand to obtain powder of 1 to 5 micrometers; 4, soaking the powder quartz sand into the water, adding dispersant into the water, and then applying high shearing force to the water dispersion solution containing the powder quartz sand to form nano silicon oxide dispersion solution within 100 nanometers; and 5, dynamically removing moisture from the nano silicon oxide dispersion solution to obtain loose nano silicon oxide powder. The painting method is carried out by mixing the following components in percentage by weight: 10 to 50 percent of the water, 0.1 to 1 percent of polyacrylamide, 5 to 15 percent of resin, and 34 to 84.9 percent of the nano silicon oxide dispersion solution. The process solves the problem of interface compatibility of the nano quartz sand and organic resin, and greatly improves the mechanical strength and chemical stability of a membranous layer under the condition of the same appearance as the pure resin.

The invention discloses a method for detecting a new coronavirus SARS-CoV-2 antigen by combining a two-dimensional plane with SERS (Surface Enhanced Raman Scattering), and belongs to the technical field of biology. According to the detection method disclosed by the invention, the principle of specific recognition of a new coronavirus SARS-CoV-2S protein-nucleic acid aptamer is utilized, after specific immunization is carried out on S protein and a two-dimensional plane of immune gold nanoparticles attached with the new coronavirus SARS-CoV-2S protein, the immune gold nanoparticles are combined with immune gold signal nanoparticles, and a sandwich structure is constructed; then, the SERS signal can be directly detected through a portable Raman spectrometer, and the ultrahigh detection sensitivity of the SARS-CoV-2S protein as low as 1TU/ml to the new coronavirus SARS-CoV-2S protein is realized. According to the method, nucleic acid extraction or antibody-dependent detection is not needed, the novel coronavirus SARS-CoV-2 protein can be specifically and ultrasensitively detected in a short time, and a favorable and effective way is created for early screening of pathogens infected with the novel coronavirus SARS-CoV-2S.

The invention provides a novel efficient composite guanidyl papermaking bactericide, and belongs to the technical field of papermaking bactericide production. The bactericide comprises following components in parts by weight: 10-30 parts of a guanidyl polymer, 5-15 parts of 2-octyl-2H-isothiazol-3-one, 150-450 parts of diethylene glycol, 0.5-1.5 parts of dodecyl dimethyl benzyl ammonium chloride,0.3-1.8 parts of hydroxymethyl cellulose and 0-100 parts of potassium hydrogen phthalate, wherein the guanidyl polymer is polyhexamethylene biguanidine hydrochloride. Polyhexamethylene biguanidine hydrochloride is a broad-spectrum antibacterial product, has killing capacity on Gram-positive bacteria, Gram-negative bacteria, fungi and saccharomycetes and can be used for producing and manufacturingantibacterial paper for health products to replace silver-containing Kuerxin paper, and meanwhile, a polyhexamethylene biguanidine hydrochloride solution also improves physical properties and hygroscopic property of the paper and strength and breathability of the paper stained with water, so that the solution is a papermaking bactericide with excellent performance; the bactericide is one efficientand broad-spectrum composite type TS-302 papermaking bactericide under the synergistic effect of the components.

The invention discloses a preparation method and application of a silver powder dispersoid. The method comprises the steps of: dissolving polyethylene glycol, a quaternary ammonium salt cationic surfactant and a silane coupling agent with water to obtain a mixed solution, adding nano silver powder and micron silver powder, and ball-milling the mixture well, and carrying out filtering and drying to obtain modified silver powder; and dissolving amino-terminated hyperbranched polyamide in a solvent, adding ethylene glycol diglycidyl ether and the modified silver powder, grinding well, and carrying out heating, grinding and reacting to obtain the silver powder dispersoid. The silver powder dispersoid has better dispersion stability and conductivity and can be applied to preparation of conductive silver paste.

The invention provides polymethyl methacrylate-sodium maleic acid fatty alcohol ester-aluminum oxide nanocomposite material and a preparation method thereof. The method is as below: using the PMMA andsodium maleic acid fatty alcohol ester as copolymerization monomers, using sodium maleic acid fatty alcohol ester as an emulsifier, and adding an initiator to prepare a pre-emulsion; with sodium maleic acid fatty alcohol ester as a dispersing agent, pre-dispersing nano-Al2O3 in an aqueous solution, and adding PMMA to the above dispersion liquid to form an emulsion polymerization system; heating the emulsion polymerization system to an initiation temperature, adding an initiator, and during the polymerization, gradually dropwise adding the pre-emulsion prepared in the step 1 to the emulsion polymerization system; and conducting complete reaction to obtain the polymethyl methacrylate-sodium maleic acid fatty alcohol ester-aluminum oxide copolymer emulsion. In the copolymer emulsion and copolymer microsphere powder, the aluminum oxide is dispersed at a nano level, and the dispersion state is uniform and stable; therefore, the method solves the serious agglomeration problem of the nanoparticles in the polymethyl methacrylate-sodium maleic acid fatty alcohol ester-aluminum oxide nanocomposite material.

The invention discloses environment-friendly polymer cement waterproof coating which is characterized in that the coating is prepared by mixing a liquid material and a powder material according to a mass ratio of 1:(0.9-2); the liquid material is prepared from the following raw materials in parts by weight: 40-60 parts of a vinyl-terminated waterborne polyurethane emulsion, 10-20 parts of 2,6-diaminopurine riboside/5,5-dimethyl-1,3-bis(oxiranyl methyl)imidazolidine-2,4-dione polycondensate, 1 to 3 parts of allyl 2-chloro-1,1,2-trifluoroethyl ether, 1 to 4 parts of a cosolvent, 2 to 5 parts ofan emulsifier, 0.1 to 0.3 part of a dispersing agent, 0.1 to 0.3 part of a defoaming agent, 1 to 3 parts of a coupling agent and 20-30 parts of water; the powder material comprises the following components in parts by weight: 30-40 parts of cement, 10-20 parts of palygorskite powder, 10-20 parts of cordierite powder, 5-10 parts of zircon powder, 5-10 parts of waste gypsum, 1-2 parts of lignin and0.3-0.6 part of a photoinitiator. The coating is excellent in comprehensive performance, good in performance stability, large in adhesive force, not easy to fall off, good in corrosion resistance, wear resistance and mechanical property, and safe and environment-friendly to use.