Inorganic powder particle activity coating machine, modified depolymerization machine, dispersing machine

Release time:

2024-09-11 09:19

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Inorganic powder is generally micron or nano particles, because of its small particle size, large specific surface area, high surface energy, easy to agglomerate, difficult to uniformly disperse in composite materials, affecting the effect of addition. The surface properties of inorganic powders are very different from those of polymer organic systems, which also makes inorganic powders not well dispersed into materials. Therefore, when inorganic powder is added to the polymer composite,First of all, the surface modification of inorganic powder,make its particle surface organic, improve its lipophilicity and compatibility with the matrix,Enhance interface combining abilitySo as to play the function of inorganic powder.

Surface modification is the treatment of powder surfaces by physical, chemical or mechanical methods.,According to the application needs to change the physical and chemical properties of the powder surfaceTo change its surface properties to meet the needs of material, process or technology development.

Physical coating modification, namely surface coating modificationWhen the inorganic powder and modifier are mixed in a certain proportion,Due to the effect of stirringThe modifier is adsorbed on the surface of the powder by electrostatic attraction or van der Waals force, thus forming a single-layer or multi-layer coating. Different from chemical coating modification,After modification, the modifier has no chemical reaction with the particle surface. Due to the presence of the cladding,Spatially hindered repulsion between particlesIt has played a role in weakening or shielding its re-reunion. This method is suitable for surface modification of almost all inorganic powders.

Chemical coating modification refers to the use of certain technical means.,Chemical reactions or chemisorption using functional groups in modifier molecules and powder surfaces, which is wrapped on the surface of the inorganic powder. The chemical coating method is the most commonly used modification method,Wet process is generally used. There are a variety of specific methods. such as sol-Gel method, which can be used not only for the coating of ultrafine powders, but also for the preparation of ultrafine powders;Treatment of Silicon Carbide Powder with Silicone Coupling AgentUnder suitable conditions, the organic monomer is grafted on the surface of the particle by polymerization.,Formation of polyelectrolyte layer,The dispersion stability of modified silicon carbide powder in water is much better than that of unmodified silicon carbide powder.

mechanical methodis to use mechanical means,Change the crystal lattice structure of the powderThe internal energy of the system increases and the temperature rises, which promotes the continuous decomposition of the powder particles into small particles, which chemically combines or adheres to other substances to achieve the purpose of surface modification. in industrial production,Commonly used vertical modification machine honeycomb mill for processing,Honeycomb mill is a kind of mechanical compound modification machine, the biggest feature is set drying, compound modification and dispersion treatment and spheroidization four functions in one, is a real high degree of continuous powder compound modification machine, but also has a compact structure, small size, easy operation, smooth operation, low labor intensity, low noise and so on. It is mature and stable in simplifying the powder modification process, improving the quality of powder modification and reducing the cost of powder modification. Very suitable for industrial large-scale continuous production. Under general conditions, honeycomb mill can be applied at the same time more than two kinds of coating medium, coating rate can reach99.2%, the activation rate was 99.8%.

Reference source: Baidu Library. If there is infringement please contact delete!

 

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