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81results about How to "Good dispersion effect" patented technology

Method for preparing high-thermal-stability cerium-based oxygen storage material

The invention relates to a method for preparing a high-thermal-stability cerium-based oxygen storage material, which is characterized in that the cerium-based oxygen storage material comprises cerium dioxide, zirconium dioxide, aluminum oxide in a small amount and at least one rare-earth crystal stabilizer selected from lanthanum oxide, praseodymium oxide, yttrium oxide and terbium oxide. The method comprises the following steps in the preparation process: adding a proper amount of surfactant, to obtain a cerium-based composite oxide material having the characteristics of single crystalline phase, high oxygen storage performance and high specific surface area; and ageing the cerium-based composite oxide material at a high temperature (1,050 DEG C) for 5h until the specific surface area thereof is higher than 35m<2>/g and the oxygen storage capacity thereof is higher than 400 mu mol/g. According to the phase results, the cerium-based oxygen storage material has a uniform-phase structure, moreover, a uniform solid solution with a cubic fluorite structure can be prepared from zirconium dioxide, aluminum oxide, stabilizer and cerium dioxide. The preparation process of the oxygen storage material has the characteristics of simple process, lower production cost, easy industrial scale-up, etc.
Owner:CHINA NAT OFFSHORE OIL CORP +1

Preparation method of azotized graphene lithium ion power battery slurry

ActiveCN104979563APrevent stacking againGood dispersion effectCell electrodesHigh ratePower battery
The invention relates to a preparation method of azotized graphene lithium ion power battery slurry. The preparation method mainly comprises the preparation of azotized expanded graphite and azotized graphene lithium ion power battery slurry. The preparation method comprises the steps of firstly, introducing a nitrogen increasing agent in the expandable graphite and expanded graphite preparation process, and azotizing to obtain azotized expanded graphite; and secondly, preparing azotized graphene by taking the azotized expanded graphite as the raw material, and introducing substances such as a dispersing agent, a conductive agent, active materials and a binder in the preparation process so as to obtain the azotized graphene lithium ion power battery slurry. According to the preparation method, azotized graphene or the compound of azotized graphene and other conductive additives is adopted as the conductive additive of the lithium ion power battery slurry, the high-temperature cycle performance, high-temperature storage performance and high-rate discharge performance are further improved; on the other hand, the preparation of azotized graphene and the dispersion of the lithium ion power battery slurry are implemented simultaneously, and the problem that graphene cannot be dispersed easily in the application process can be solved.
Owner:XIAMEN KNANO GRAPHENE TECH CORP

Nanometer core-shell rubber particle toughening epoxy resin compound and preparation method of nanometer core-shell rubber particle toughening epoxy resin compound

The invention provides a nanometer core-shell rubber particle toughening epoxy resin compound and a preparation method of the nanometer core-shell rubber particle toughening epoxy resin compound. The compound comprises epoxy resin, nanometer core-shell rubber particles, a silane coupling agent and an optional diluting agent, wherein the epoxy resin accounts for 39 percent to 84 percent of the weight of the compound; the content of the nanometer core-shell rubber particles accounts for 8.4 percent to 23.4 percent of the weight of the epoxy resin; the silane coupling agent is added into the compound in a form of being coated onto the surfaces of the nanometer core-shell rubber particles; the content of the silane coupling agent accounts for 1 percent to 10 percent of the weight of the nanometer core-shell rubber particles. The nanometer core-shell rubber particle toughening epoxy resin compound has the advantages that the dispersing effect is good; in addition, the storage stability is good; when the compound is used as a toughening agent to be added into an epoxy resin composition for preparing copper cladded plates, the toughness of epoxy resin curing materials can be improved, so that the copper cladded plates with excellent toughness and flexibility can be prepared.
Owner:GOODE EIS SUZHOU CORP LTD

Nano-zirconia dispersion liquid, preparation method thereof, monomer dispersion liquid obtained based on nano-zirconia dispersion liquid and optical film

The invention provides a nano-zirconia dispersion liquid, a preparation method thereof, a monomer dispersion liquid obtained based on the nano-zirconia dispersion liquid and an optical film, and belongs to the field of fine chemical engineering. The amount of nano-zirconia particles contained in the nano-zirconia dispersion liquid provided by the invention is 45 to 75 weight percent; through infrared spectrum characterization, it is found that functional groups in the following peak intervals are grafted on the surfaces of the nano zirconium oxide particles: a hydroxyl group with the peak interval of 3200 cm <-1 > to 3600 cm <-1 >, a Zr-O-Zr group with the peak interval of 480 cm <-1 > to 850 cm <-1 >, a saturated carbon-hydrogen bond with the peak interval of 2850 cm <-1 > to 2960 cm <-1 >, an ester carbonyl group with the peak interval of 1700 cm <-1 > to 1750 cm <-1 >, a delocalized conjugated ester group with the peak interval of 1460 cm <-1 > to 1580 cm <-1 >, a Si-O-Zr group with the peak interval of 800 cm <-1 > to 1200 cm <-1 > and a C-O ether bond with the peak interval of 1000 cm <-1 > to 1200 cm <-1 > the nano-zirconia dispersion liquid provided by the invention has high dispersion content, and the refractive index can reach 1.420-1.565; the dispersion content of the nano-zirconia monomer dispersion liquid obtained based on the nano-zirconia dispersion liquid can reach 55-85wt%, and the refractive index can reach 1.620-1.720; and the refractive index of a high-refractive coating can be greatly improved in subsequent preparation of a brightness enhancement film or an anti-reflection film, and therefore, the performance of the film is improved.
Owner:SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD

Paint dispersing equipment with spraying dispersion function

The invention provides paint dispersing equipment with a spraying dispersion function. The equipment comprises a base, a height adjusting device is arranged on the left side of the base, a cantilever beam is arranged at the top end of the height adjusting device, a first motor, a conveyor belt and a pair of belt wheels are arranged in the cantilever beam, one end of the conveyor belt is connected with the first motor through the belt wheels, a main rotary shaft is connected to the other end of the conveyor belt through the belt wheels, the main rotary shaft is located in a dispersing barrel, and the dispersing barrel is located on the base; an inner sleeve cylinder is arranged outside the main rotary shaft in a sleeving mode, and the inner sleeve cylinder is fixedly connected with the main rotary shaft through multiple supporting rods. The paint dispersing equipment has the advantages that when the main rotary shaft moves downward, liquid in a liquid storage shell is extruded by an extruding block, so that the liquid in the liquid storage shell sprays outward through a spraying sleeve cylinder with a certain flow speed, and in the spraying process, dispersing treatment is conducted on paint in the liquid by means of blades, so that the dispersing effect of the paint is improved.
Owner:李云

Preparing method of hyperdispersant and non-dyed polyurethane elastic fiber

The invention relates to a preparing method of hyperdispersant and non-dyed polyurethane elastic fiber. According to the method, a diisocyanate compound and polytetramethylene ether glycol are added into a N,N-dimethylacetamide or N,N-dimethylformamide solvent according to the mole ratio being (1.6-2.2):1, and a prepolymer solution is prepared; the temperature is lowered to 8 DEG C to 10 DEG C while the stirring is carried out; a mixed amine solution is added, and a spinning stock solution with the viscosity being 3800 to 4500 poises and the solid content being 30 percent to 40 percent is obtained; the spinning stock solution is injected into color paste to prepare a premixed stock solution; the premixed stock solution and the spinning stock solution are subjected to multiage tackifying blending; then, flatting agents, lubrication debonding agents and yellowing-proof agents are added; the mixture is fully stirred, and a colored stock solution is prepared; the non-dyed polyurethane elastic fiber with the fiber number being 40D to 300D is prepared by a conventional method. The preparing method has the advantages that the hyperdispersant is prepared by the self, the uniformity and the stable dispersion of the color paste in the spinning stock solution are ensured, and the coloring process of multiage tackifying blending is adopted, so that the color paste can be uniformly, fast and stably dispersed in the spinning stock solution.
Owner:LIANYUNGANG DUZHONG NEW AOSHEN SPANDEX

Polyether and carboxylic acid double-modified polyethyleneimine aqueous dispersant, and preparation method and application thereof

The invention discloses a polyether and carboxylic acid double-modified polyethyleneimine aqueous dispersant, and a preparation method and an application thereof. The polyethyleneimine molecular chainof the dispersant has a polyether side chain and a carboxylate side group, and the dispersant is prepared through a Michael addition reaction of a primary amino group and a secondary amino group contained in the polyethyleneimine and double bonds contained in alpha, beta-unsaturated acid salts and alpha, beta-unsaturated acid esters of polyether, wherein the polyethyleneimine makes the dispersanthave a good anchoring effect on inorganic powder; the polyether is a solvation chain and makes the dispersant have a steric hindrance effect; carboxylic acid is an ionic group and makes the dispersant have an electrostatic repulsion effect; and the polyether and the carboxylic acid commonly inhibit and prevent the agglomeration of dispersed particles, and the polyethyleneimine, the polyether andthe carboxylic acid are combined to obtain an excellent dispersion performance. The aqueous dispersant has an excellent dispersion performance when applied to water dispersion systems of an inorganicpigment, silicon-carbon powder, graphene and other inorganic powders.
Owner:SUN YAT SEN UNIV +1
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