52results about How to "Poor dispersion" patented technology

The infrared camouflage fiber is composed of infrared and visible light fertile material 1-15%, fiber-forming high polymer 64-98%, coupling agent 0.1-3%, disperser 0.1-3%, and auxiliary additive 1-4%. It includes the following manufacturing procedures: 1) the preparation of infrared camouflage base, 2) preparation of spinning material. 3) Spinning and extension. It can be applied to trade marks, packing of name brands, certificates, bills, banking cards, stamps or invoices. It has good false proof and concealing effect, and long endurance.

The invention relates to high-quality graphene and a preparation method thereof. The preparation method includes the steps of (1) wrap-embedding graphene oxide into the lamellas in expanded graphite to obtain a graphene oxide/expanded graphite mixture; and (2) performing thermal-treatment to the graphene oxide/expanded graphite mixture so that the expanded graphite can be stripped with assistance of a reaction force from high-temperature expansion reduction of the graphene oxide, thereby preparing the graphene powder. In the invention, the graphene oxide is wrap-embedded into the lamellas in the expanded graphite, and the expanded graphite is stripped-away with the impact force of a violent reaction in the high-temperature expansion reduction of the graphene oxide, thereby obtaining loosen graphene powder. The expanded graphene is controllable in the number of layers, is free of defect, is less in impurities and is high in purity.

Embodiments of the present invention provide a dry powder composition comprising porous carrier particles associated with one, two, three or more micronized drugs or APIs wherein an ordered mixture between the micronized drug or drugs and the carrier particle results, such that the micronized drug or drugs adhere strongly to the carrier particles forming a stable ordered mixture of respirable agglomerates. Embodiments of the present invention further comprise a spray-drying process to create the respirable agglomerates. Embodiments of the present invention further relate to the use of the dry powder formulation comprising respirable agglomerates for the treatment of a patient having a disease or condition which is treatable thereby.

A process for preparing the separating protein dedicated for milk products includes low-temp deoiling of soybean slices, primary extracting, separating protein liquid from dregs, secondary extracting, separating protein liquid from dregs, degassing, depositing in acid, separating the primary milk curd from whey, water washing, separating the secondary milk curd from whey, enzymolyzing, ageing, sterilizing, spray drying, and coating phosphatide.

The invention discloses a graphene oxide-epoxidized styrene butadiene rubber compound, a preparation method thereof and vulcanized rubber. The compound comprises graphene oxide and epoxidized styrene butadiene rubber, wherein graphene oxide accounts for 0.1-15 parts by weight in 100 parts by weight of epoxidized styrene butadiene rubber; when 2<theta> in an XRD (x ray diffraction) spectrum of the compound ranges from 2 degrees to 12 degrees, a diffraction peak of graphene oxide does not appear; a characteristic peak of ester appears near 1,750 cm <-1> and 1,240 cm <-1> in an infrared spectrum of the compound; and a characteristic peak of ether linkage appears near 1,150 cm <-1> in the infrared spectrum of the compound. In the compound, graphene oxide and epoxidized styrene butadiene rubber form chemical bond combination, so that the tensile break strength can be higher, and further obtained vulcanized rubber has better mechanical property.

The invention discloses a preparation method of a nano-silver antibacterial agent, the nano-silver antibacterial agent, antibacterial plastics and a preparation method of the antibacterial plastics. The preparation method of the nano-silver antibacterial agent comprises the following steps: adopting a liquid-phase chemical reduction method, wherein the liquid phase is a hydroxyl-containing water-free organic solvent, and a protective agent and a penetrating agent can serve as reactive reduction agents; reducing Ag<+> into nano Ag particles at a certain temperature, and finally forming a stablesolution of a silver-containing complex with the protective agent, the penetrating agent and the solvent under a certain conditions, thereby obtaining the stable, colorless, transparent and water-free nano-silver antibacterial solution. The nano-silver antibacterial agent prepared by the method achieves an excellent antibacterial effect when applied to the antibacterial plastics.

The invention discloses a high-strength wear-resistant natural rubber composite material and a preparation method thereof. The rubber material is prepared from the following raw materials: natural rubber, epoxidized natural rubber, modified silicon nitride, microcrystalline white mica powder, modified halloysite nanotubes, nano microcrystalline cellulose, calcium sulfate whiskers, lignocellulose staple fibers, aramid staple fibers, zinc borate, neodymium stearate, an accelerant and sulfur. The natural rubber and epoxidized natural rubber are used as main materials, lignocellulose staple fibersand aramid staple fibers are added into a system at the same time, are uniformly dispersed in the system, have good adhesiveness with the system, and are matched with modified silicon nitride, microcrystalline white mica powder, modified halloysite nanotubes, calcium sulfate whiskers and nano microcrystalline cellulose, a significant role in enhancing wear resistance is realized, and the tensilestrength, tearing strength and wear resistance of the composite material are remarkably improved while the vulcanization characteristic of the rubber compound is maintained.

The invention belongs to the field of organic synthesis, and concretely relates to a preparation method of a pyrazolyl acrylonitrile compound. A pyrazole carboxylic ester compound and p-tert-butylphenylacetonitrile are shown in a general formula (II), in the existence of an organic solvent and alkali, a reaction is carried out at 60-160 DEG C, 2-(4-(tert-butyl)phenyl)-1-(1-ethyl-3-methyl-1hydrogen-5-pyrazolyl)-2-cyan vinyl alcohol sodium salt or kali salt is obtained as shown in a general formula (III), a reaction is directly carried out between the obtained compound (III) and pivaloyl chloride at 60-160 DEG C, and the pyrazolyl acrylonitrile compound as shown in a general formula (I) is obtained. The method has the advantages of high yield of the target compound, low 'three wastes (waste gas, waste water and industrial residue)' discharge, and simple operation; and the method is suitable for large scale industrial production.

The present disclosure relates a method of making a dispersion. Microparticles, nanoparticles and an asphalt component are mixed to form a dispersion. A sufficient amount of nanoparticles provides for an increase in material throughput relative to a comparable dispersion that is free of nanoparticles.

The invention provides a copper-plated graphene aluminum-based composite material and a preparation method thereof. The method comprises the following steps that S1, solution-method copper plating treatment is conducted on the surface of graphene powder, and copper-plated graphene powder is prepared; S2, the copper-plated graphene powder prepared in the step S1 and aluminum powder are mixed through an electrostatic self-assembly method, and copper-plated graphene and aluminum composite powder is prepared; and S3, the copper-plated graphene and aluminum composite powder prepared in the step S2is sintered by adopting a spark plasma sintering process to prepare the copper-plated graphene aluminum-based composite material. According to the copper-plated graphene aluminum-based composite material and the preparation method thereof, the copper-plated graphene is used as a reinforcing body, and copper particles can be uniformly coated on the surface of graphene, so that the graphene is uniformly dispersed in an aluminum matrix, the interface bonding of the graphene and the aluminum matrix is improved, and the hardness and the wear resistance of the composite material are improved.

This invention relates to preparation and use of in situ functionalized elastomers in a rubber composition, namely post polymerization functionalization of elastomers, in rubber compositions containing precipitated silica filler reinforcement and tires having components thereof.

The purpose of the present invention is to provide a method for producing a metal powder-containing composition that has excellent re-dispersibility and excellent long-term stability by solving the problems of solidification of the composition and sedimentation of the metal powder, said problems being caused by poor dispersion due to the fact that the metal powder is coated with a metal oxide in the composition that contains the metal powder. A method for producing a metal powder-containing composition of the present invention is a method for producing a metal powder-containing composition that contains a metal powder and a binder component. This method for producing a metal powder-containing composition comprises: a step wherein a metal oxide is produced by hydrolyzing a metal alkoxide and a metal powder is coated with the metal oxide; and a step wherein the metal powder coated in the above-mentioned step is heated to 70 DEG C or higher in an organic solvent.

The invention relates to the technical field of high polymer materials, in particular to a glass fiber reinforced PPS-CNT (polyphenylene sulfide-carbon nano tube) conductive composite and a preparation method thereof. The PPS-CNT conductive composite is prepared from raw materials in parts by weight as follows: 30-70 parts of PPS raw powder, 3-15 parts of CNTs, 1-5 parts of a toughening compatibilizer, 0.1-0.2 parts of a heat stabilizer, 0.1-2.0 parts of a lubricant and 20-60 parts of glass fibers. The glass fiber reinforced PPS-CNT conductive composite with high cost performance and high performance is provided in order to solve the problems that an existing graphite conductive PPS material does not have sufficient mechanical property and is high in addition amount and difficult to process and a carbon fiber conductive PPS material is high in adding proportion, poor in dispersion and high in cost.

The invention provides a modified phosphorus-nitrogen type flame retardant and a preparation method thereof. The preparation method comprises the following steps: adding pentaerythritol into a three-neck flask, putting the flask into an ice-water bath, stirring for 30 minutes at the rotating speed of 100 to 120 r/min, dropwise adding phosphorus oxychloride while stirring, controlling the dropwiseadding time to be 15 minutes, absorbing tail gas by using a sodium hydroxide aqueous solution with the mass fraction of 20% in the dropwise adding process, after dropwise adding is finished, stirringfor 30 minutes at a constant speed, then heating to 60 to 70 DEG C, and stirring for 2 hours at a constant speed at the temperature. In the step S3, melamine and cyanuric acid are mixed and subjectedto hydrogen bond compounding, then a mixed solution A prepared from a second product is added, and the second product is added, so that the formation of a melamine cyanurate large-plane network structure can be interfered and inhibited, the particle size is refined. and the prepared modified phosphorus-nitrogen type flame retardant has good dispersity.

The invention discloses a high-toughness and aging-resistant ABS material, which comprises the following raw materials by weight: 100 parts of ABS resin, 0.5-5.0 parts of alkylated graphene oxide or alkylated reduced graphene oxide and 1.0-10.0 parts of a nano cellulose/attapulgite composite material. Compared with the prior art, according to the invention, graphene oxide is alkylated by tetraoctyl ammonium bromide and 1-iodododecane, so that the dispersity of graphene oxide in a polypropylene material can be remarkably improved, and the toughness of the ABS material is remarkably optimized; moreover, the nano cellulose/attapulgite composite material is also added, so that the toughness and aging resistance of the ABS material can be further improved.

Methods to make a silica elastomer composite with a destabilized dispersion of a never-dried, or as-produced, precipitated silica are described, along with silica elastomer composites made from the methods. The advantages achieved with the methods are further described.

The invention provides a device for polycondensation of polyol by using a cyclic compound, the device comprises a reaction kettle, a first micro-interface generator is arranged at the bottom layer in the reaction kettle, and a second micro-interface generator is arranged at the middle layer in the reaction kettle; a first one-way channel used for preventing materials from flowing reversely is arranged between the first micro-interface generator and the second micro-interface generator, a second one-way channel is arranged above the second micro-interface generator, and a polyhydric alcohol pipeline and an annular compound pipeline are arranged on the side edge of the bottom of the reaction kettle. The first micro-interface generator is connected with the annular compound pipeline and is used for introducing a vaporized annular compound for dispersing and crushing, and a polycondensation product pipeline is arranged at the top of the reaction kettle. By applying the micro-interface enhanced reaction technology, the consumption rate of the cyclic compound gas can be greatly increased, the partial pressure of the cyclic compound in the gas phase is effectively reduced, and the intrinsic safety of equipment is greatly improved.