Powder Material Coating and Dispersion Machine, Deagglomeration Machine, Activation Machine, Drying Machine

Release time:

2025-12-03 08:49

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The coating and modification machine integrates a variety of advanced technologies to achieve precise modification and coating of materials. Among these, centrifugal mixing technology is one of its core components. By means of high-speed rotating parts, the machine generates powerful centrifugal forces that rapidly disperse and mix the materials within the modification chamber. In some high-performance coating and modification machines, the rotor can spin at speeds reaching several thousand revolutions per minute. This high-speed rotation instantly flings the materials toward the inner walls of the modification chamber, after which they are re-aggregated under the influence of a complex flow field, enabling rapid and thorough mixing. As a result, the modifying agent can be uniformly distributed across the material’s surface.

High-speed rotational modification is also an important working method. During high-speed rotation, intense collisions and friction occur between the material and the modifying agent. These collisions and frictions not only increase the contact area between the material and the modifying agent but also generate substantial heat, thereby accelerating the modification reaction. Taking surface modification of calcium carbonate powder as an example, in a high-speed rotating modifier, calcium carbonate particles collide with modifying agents such as coupling agents. The coupling agent molecules quickly adsorb onto the surface of the calcium carbonate particles and undergo chemical reactions with the active sites on the particle surfaces, forming strong chemical bonds and thus achieving effective surface modification of the calcium carbonate. 。

There are numerous common coating techniques available, offering a wealth of options for material modification. The self-assembly process leverages non-covalent interactions among molecules—such as electrostatic forces, hydrogen bonds, and van der Waals forces—to enable modifier molecules to spontaneously form an ordered coating layer on the material’s surface. When surface-modifying nano-sized titanium dioxide, surfactants with specific functional groups can be selected as modifiers. In solution, these surfactant molecules interact with the nano-TiO₂ particles via electrostatic forces and van der Waals forces, self-assembling on the particle surfaces to form a uniform coating layer. This coating not only enhances the dispersibility of nano-TiO₂ in organic media but also endows it with new functionalities, such as improved resistance to ultraviolet radiation. 。

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