Everyone knows that the ultrafine pulverizer is widely used in industrial production, and the number of ultra-fine pulverized machines in the traditional Chinese medicine industry is very much and the ultra-microflac in the traditional Chinese medicine industry is a great assistant, so now we look at the ultrafi Different methods of crusher!
Ultrafine pulverizer - ultrafine powder typically includes particles of micron (1 to 30 μm), submicron (0.1 to 1 μm) and nanoscale (1 to 100 nm), due to different solid material The surface effects and volume effects exhibit unique optical, electrical, magnetic, thermophysical, catalytic and mechanical properties, but also a functional material, but also a broad application prospect for the composite and development of new function materials. In the fields of national economies, there is a wide range of applications that play an extremely important role. 1. What is the purpose of ultrafine pulverizer - ultrafine powder surface modification? Due to the ultrafine pulverizer - ultrafine powder, especially the particle size of the nano-grade powder is small, the surface can be high, it is easy to reunite, forming the secondary particles, cannot show the surface area effect of the affected, volume Effect and quantum dimension effect, etc. To solve the problem of supersetachine - ultrafine powder, improve its dispersibility, rheology, and most effective method is to modify the surface of the powder. The purpose of surface modification includes: (1) to improve or alter the dispersion of powder particles; (2) improve durability, such as resistance, light resistance, heat, weather resistance, etc. (3) increase particle surface activity; (4) ) The surface of the particles produces new physical, chemical and mechanical properties and new functions, thereby increasing the added value of the powder; (5) Improve compatibility between powder particles and other substances. 2, what is the mechanism of ultrafine pulverizer - ultrafine powder surface modification? The mechanism of ultrafine pulverizing machine - ultrafine powder surface modification is the surface and surface modifier surface and surface modifier to improve the wettability of the surface of the particles, and enhance particles in the medium. Interface compatibility makes particles easily dispersed in organic compounds or water. The modification mechanism can be divided into coating modification, coupling modification, and the like according to the surface of the particles and the modifier surface. The coating modification is to cover the surface of the particles with inorganic compounds or organic compounds, and the agglomeration of the particles is weakened or shielded. Since the coating is generated, the spatial discusion is generated, which makes the particles are very difficult, thus reaching Sexual purpose. The coupling modification is a chemical coupling reaction in the surface of the particle, and between the two components, in addition to Van Dehua Li, hydrogen bond or coordinationIn addition, there is an ionic or covalent bond combination. The particle surface can be treated with the organic matter after treatment with the inclusion agent. 3. What are the methods of ultrafine pulverizing machine - ultrafine powder surface modification? (1) Surface adsorption cladding method: The coating material is uniformly attached to the coated object by means of physical or chemical adsorption principles to form a continuous and complete coating. In this process, a simple adsorption reaction occurs, and the adsorption layer is generally a single molecule layer. Most of the selected coating materials are most organic substances, which are selectively adsorbed in the surface of inorganic particles, oriented to exhibit the properties of the modified powder surface. (2) Liquid phase cladding method: a surface modification method of a salt substance that deposits a layer or several layers of oxide or hydroxide surface surface, which is mainly divided into precipitation, alcoholine solution, Sol gel method and non-uniform phase solidification method. These are allocal granules that have been used in all or part of the coating, and then coated onto the surface of the ceramic powder. (3) Microcapsule method: Capsule modification is a surface modification method for covering homogeneity on the surface of particles and having a thickness film. Ultrafine pulverizer - Ultrafine powder surface coated modification process Figure (4) Polymer surface grafting modification method: link the aggregate length to the surface of the powder, while the polymer contains a hydrophilic group The long chain has a stereoscopic barrier in the water medium by hydration, so that the dispersion of the powder in the medium is stable in the medium, in addition to relying on the stretching, it relies on the spatial resistance, the effect is very obvious. (5) Mechanical chemical modification method: Enhance the surface activity of the particles using pulverization, friction, etc., thereby enabling the molecule lattice, which can increase, under the action of external force, and the active powder surface is reacted with other substances. Attach, achieving the purpose of surface modification. (6) High-energy modification method: a method of realizing modification using plasma or radiation treatment or the like. 4. What are the equipment of the ultrafine pulverizer - ultrafine powder surface modification? Powder surface modification equipment, mainly responsible for 3 peripherals: one is mixed; second is dispersed; three is surface modifiers to melt and uniformly dispersed into the surface of the material and produce good binding. Current surface modification machines are mainly: (1) PSC series powder surface modification machine is a special equipment for surface chemical modification. (2) Composite powder continuous modification system, is a new type of surface modification equipment that introduces Japanese technology to produce, absorbed production, is suitable for enterprises with annual production of 3,000 ~ 5 000 T modified powder. (3) SLGThe three-tube continuous powder surface modification machine is developed by the introduction of Swedish AGMW three-poke high-speed intense mixing surface modification machine HSTP-3/1000. (4) Semi-automatic strong mixing modifier unit. The development trend of continuous powder surface-covering modified surface modified equipment is: use advanced computer technology and artificial intelligence technology to automatically regulate the main parameters and modifier usage on the basis of equipment structure optimization. Modified single molecular weight adsorption in the surface of the particles, reducing the amount of modifier, stabilizing product quality and convenient operation. 5. What are the surface modifiers of ultrafine powder? The surface modification of the powder is mainly achieved by adsorption, reaction, coating or envelope of the surface modifier on the surface of the powder particles. Therefore, the surface modifier has a decisive effect on the surface modification or surface treatment of the powder. The currently used surface modifier mainly has coupling agents, surfactants, organic oligomers, unsaturated organic acids, silicones, water-soluble polymers, and metal oxides and alkoxides. 6. What is the factor affecting surface modification? The main factors affecting the surface modification of the powder are the properties of powder raw materials, surface modifier formulations, surface modified processes, surface modified equipment, and the like. The specific surface area of the powder raw material, the particle size and particle size distribution, the surface energy, surface physical chemical properties, agglomeration, etc., the surface modification effect; the formulation of surface modifiers includes selection of varieties, determine the amount and usage, etc. Surface modification process needs to meet the application requirements or application conditions of surface modifiers, and require simple process, good parameter controllability, stable product quality, low energy consumption, small pollution; high performance surface modification machine The dispersibility of the powder and surface modifiers is good, the contact or action of the powder and the surface modifier is equal. 7. How to characterize the effect of ultrafine pulverizer - the surface modification of ultrafine powder? Characterization and Evaluation of Surface Modification Effect of Ultrafine Crusher - Direct Evaluation and Indirect Evaluation Method. The direct evaluation method is to evaluate its modified effect by measuring the mechanical properties of the modified powder as a filler to the composite material and the processing properties in the material. The indirect evaluation method is to characterize the surface modification effect of the substantive material, such as a method such as contact angle, viscosity, intra-hydroelectric and flat average particle size, which simply reflects the powder in the actual production. Modified effect. Advanced analysis test methods can also be used to modify the surface modification mechanism of ultrafine pulverizer - ultrafine powderAnalytical effects were evaluated and evaluated. 8. About ultrafine pulverizer - ultrafine powder surface modification future research focus (1) further study the modification principle of ultrafine pulverizer-ultrafine powder, find applicable to various modification requirements and Applicable new modification methods for actual production; (2) optimize the modified process flow on the basis of in-depth study of modification, and develop "composite" processing processes that can achieve a variety of modified purposes; (3) In improving the original Some universal chemical equipment developed to develop equipment that adapts to surface modification; (4) vigorously develop low cost, high-performance modifiers, and develop modifiers with special functions for certain special modification requirements.