32results about How to "Reduce the propensity to reunite" patented technology

The invention discloses a graphene surface modification method, and relates to the field of graphene surface modification. The surface-modified graphene prepared by the method is characterized in that nanoscale copper particles are aggregated into small particles to be dispersed on the surface of the graphene. The method comprises the following steps: by taking graphene as a reinforcing phase, adding graphene into a dopamine hydrochloride solution, then adding CuSO4 into a polydopamine graphene solution, and reducing Cu <2+> to form Cu nanoparticles on the surface of graphene. The surface-modified graphene prepared by the process is stable in microstructure, and can effectively improve the dispersity of the composite material and improve the performance of the composite material when being added into the composite material as a reinforcing phase.

The invention discloses spherical iron phosphate and a preparation method and application thereof. The preparation method comprises the following steps: adding a disperser into iron-phosphorus mixed liquor containing iron ion and phosphate anion, thus obtaining mixed liquor A; under a heating condition, adding urea into the mixed liquor A to regulate a pH value, and continuously heating to obtainmixed liquor B containing crystal-form iron phosphate; filtering the mixed liquor B, adding a filter cake into water to prepare mixed liquor C, atomizing the mixed liquor C by a spray gun, leading into a roasting furnace, and roasting at a temperature of 550 to 750 DEG C to obtain the spherical iron phosphate. The spherical iron phosphate is pure in crystalline phase, good in crystallinity, spherical in shape, uniform in grain fineness distribution and high in tap density, and can serve as a precursor for synthesizing spherical lithium iron phosphate with high tap density; the spherical iron phosphate can eliminate microscopic composition difference caused by different diffusion paths in a reaction, so as to generate the lithium iron phosphate with a uniform structure, and thus the performance of the lithium iron phosphate is improved.

The present invention provides a silicone microparticle, wherein the silicone microparticle comprises 100 parts by mass of a silicone elastomer spherical microparticle having volume-average particle diameter of 0.1 to 100 μm and 0.5 to 25 parts by mass of a polyorganosilsesquioxane to cover surface of the silicone elastomer spherical microparticle, wherein the polyorganosilsesquioxane has a shape of granule with the size thereof being 60 nm or less. There can be provided a silicone microparticle having low agglomerating tendency and excellent dispersibility even if rubber hardness of a silicone elastomer microparticle is low and a particle diameter thereof is small.

The invention discloses a printing fabric production process, and relates to the technical field of textile processing. The printing fabric production process includes the working procedures of preparing base fabric, desizing and boiling, dyeing, high-temperature setting, printing, re-setting treatment and the like. The invention further discloses an antibacterial microcapsule preparation method,which realizes uniform coating of particles, lightens the agglomeration tendency easy to occur in conventional means, improves the uniformity of microcapsules, and the obtained printed fabric has a good antibacterial effect, good color fastness, uniform color, high use performance and a good market prospect.

The invention belongs to the technical field of flame-retardant wire and cable processing, in particular to a method for improving the impact resistance of a thin-wall flame-retardant wire cable material. The preparation method comprises the following steps: preparing a nano calcium carbonate composite material, preparing materials, mixing the raw materials, granulating and aging. Compared with the prior art, the preparation method has the following advantages that the preparation of the nano calcium carbonate composite material reduces the agglomeration tendency, the middle material is compounded with acrylonitrile-butadiene-styrene copolymer and then is compounded with high-polymerization-degree ammonium polyphosphate at the same time, so that the tensile strength and the flame retardancy of the obtained composite material are obviously improved, the resin raw materials with different performances are cooperated, and then aging is carried out after the electric wire and the cable material are prepared, and a sample strip with the thickness of 0.6 mm is produced, detection is carried out, and the surface of the wire rod after mechanical scraping is not white, the acid and alkali resistance is good, the flexibility and impact resistance are relatively good, the environment-friendly and flame-retardant effects are achieved, and poisonous black smoke cannot be generated during combustion, and the flexibility and processability are good.

The invention discloses a high-shading polypropylene composition and a preparation method thereof. The polypropylene composition is prepared from the following components in parts by mass: 60-80 parts of medium-flowability polypropylene, 10-20 parts of high-flowability polypropylene, 3-5 parts of surface modified nano titanium dioxide, 2-5 parts of surface modified nano barium sulfate, 0.2-0.5 part of a dispersing agent, 5-10 parts of a toughening agent and 0.5 part of an antioxidant. Compared with the traditional titanium dioxide filled modified polypropylene, the polypropylene composition provided by the invention has the advantages that the addition amount of the surface modified nano titanium dioxide and the surface modified nano barium sulfate is small, the material density is small, and the polypropylene composition is more in line with the development trend of light weight of automobiles; under the action of the high-fluidity polypropylene, the mechanical property and the surface gloss of the material are obviously improved, and the comprehensive performance is excellent; in addition, under the combined action of the surface modified nano titanium dioxide and the surface modified nano barium sulfate, the material has a better shading effect.

The invention discloses a lithium ion battery capable of being rapidly charged and a preparation method of the lithium ion battery. The lithium ion battery comprises a positive electrode, a negative electrode, a diaphragm inserted between the positive electrode and the negative electrode, and an organic electrolyte; the particle size D50 of an active material of the positive electrode is 3.1-8.1 microns; the particle size D50 of an active material of the negative electrode is 11.5-17.5 microns; the positive electrode surface density of the positive electrode is 357-373g/m<2>; and the negativeelectrode surface density of the negative electrode is 179-187g/m<2>. The lithium ion battery has good high-current rapid charging performance; the lithium precipitation of the battery is not caused;and the cycle life of the battery is not influenced. In addition, 1.3-1.7mol/L of LiPF6 is used as a lithium salt, and a modified carbon nanotube is used as a conductive agent, so that the high-current rapid charging performance can be further improved, and the final charging time is shortened by 55-60%.

The invention relates to the field of calcium carbonate, and discloses modified heavy calcium carbonate used for a louver blade. The modified heavy calcium carbonate is prepared from the following rawmaterials in parts by weight: 100 parts of heavy calcium carbonate, 0.5 to 1 part of sodium cetyl sulfate, 0.5 to 1 part of sodium stearate and 1 to 1.5 parts of ricinoleic acid. The objective of theinvention is to provide low-agglomeration modified heavy calcium carbonate used for the louver blade.

The invention relates to the technical field of packaging adhesives, in particular to a POE packaging adhesive and a preparation method thereof. The POE packaging adhesive is mainly prepared from thefollowing raw materials in parts by weight: 100 parts of POE resin, 10-30 parts of master batch, 1-2.5 parts of a cross-linking agent, 0.8-2 parts of an assistant cross-linking agent, 0.2-1 part of atackifier, 0.2-0.8 part of an ultraviolet absorbent and 0.1-0.8 part of an antioxidant, wherein the master batch is mainly prepared from the following components in percentage by mass: 30%-60% of modified titanium dioxide and 40%-70% of POE resin. By introducing the modified titanium dioxide filler and adopting specific raw material composition and proportion, the adhesive film has higher volume resistivity which can reach 1*10<16> omega.m or more, the tendency of agglomeration of titanium dioxide particles is reduced through modification treatment of titanium dioxide, the dispersion uniformity is good, and the prepared POE packaging adhesive is uniform in reflectivity and beneficial to improvement of the working efficiency of assemblies.

The invention discloses an insecticidal and bactericidal organic fertilizer. The organic fertilizer comprises organic fertilizer particles in a core layer and a microcapsule shell layer covering the core layer; the microcapsule shell layer contains a bactericide, and the bactericide has a certain concentration gradient in the microcapsule shell layer from inside to outside in the thickness direction of the microcapsule shell layer. The prepared insecticidal and bactericidal organic fertilizer can be slowly released into soil and has the effect of continuously improving the soil quality and crop quality for a long time. In addition, because the microcapsule shell layer contains the bactericide with the concentration gradient, the fertilizer has a good insecticidal and bactericidal effect, the use amount of the bactericide is also reasonable, and the situation is avoided that since bactericide residues remain in the soil, pollution is caused to the soil and the environment, and a toxic effect is generated on crops in the next season. The invention also discloses a preparation method of the insecticidal and bactericidal organic fertilizer.

The invention relates to a powder dispersion method for magnetron sputtering coating. The powder dispersion method comprises the step that a certain ratio of large particle powder with a large particle size and a small specific surface area is incorporated into a powder base material with the small particle size and the large specific surface area for magnetron sputtering coating. Under the traditional mechanical vibration dispersion conditions, the powder dispersion method can effectively reduce surface energy of an entire system, reduce an agglomeration tendency of the powder base material,and can improve the dispersion effect of the powder base material through the impact of the large particle powder and the agglomerate powder base material, thereby achieving the uniform coating. Afterthe coating is completed, the large particle powder is removed by screening to obtain a coated product. The particle size of the powder base material is 0.1-150[mu]m, the particle size of the large particle powder is 200[mu]m-2mm, and a mass ratio of the powder base material to the large particle powder is (5-20):1.