Barium sulfate surface modification machine, dispersion and deagglomeration machine, mixing modification machine.

Release time:

2025-01-23 09:02

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Barium sulfate, as an important non-metallic mineral raw material, has a wide range of applications in various fields. However, there are differences in physical structure and chemical properties between natural barium sulfate and organic materials, which makes it difficult to disperse evenly in organic materials, affecting the performance of composite materials. Therefore, purposefully coating and modifying barium sulfate to change its physical structure and chemical properties, and improve its dispersibility and affinity with polymer materials, is of great significance..

Through coating modification, a stable and uniform coating layer can be formed on the surface of barium sulfate powder, changing its surface properties from hydrophilic to oleophobic, thereby improving its dispersibility and affinity in inorganic materials. At the same time, the modified barium sulfate powder can also improve the processing performance, physical properties, and chemical stability of inorganic polymer composite materials, reduce resin usage, lower production costs, and expand its application prospects.

Surface coating modification is the use of physical or chemical methods to form a stable and uniform coating layer of organic substances on the surface of barium sulfate particles, thereby achieving the purpose of modifying the powder surface. The surface of the modified barium sulfate powder is hydrophilic and oleophobic, changing its dispersibility and affinity in inorganic materials..

Common methods for surface coating modification include chemical deposition, mechanochemical methods, and coating methods. The chemical deposition method mainly utilizes precipitation reactions, adding modifiers and precipitating agents, allowing the modifier to deposit on the surface of barium sulfate powder, forming a very fine inorganic oxide coating. The mechanochemical method involves mixing barium sulfate powder with modifiers uniformly and crushing it with an airflow mill. Due to the good active sites on the fracture surface, the modifier reacts on the surface of the barium sulfate powder, forming a surface modification layer. The coating method involves placing barium sulfate powder in a mixer and fully mixing it with the modifier during stirring, allowing the modifier to coat the surface of the barium sulfate powder.

When the formulation of the surface modifier and the modification process are determined, the surface modification equipment becomes a key factor affecting the surface modification or treatment effect of the powder. Good performance surface modification equipment should have the following basic process characteristics: good dispersibility of the powder and surface modifier; equal opportunities for contact or interaction between the powder and the surface modifier; adjustable modification temperature; low energy consumption per unit product; no dust pollution; simple operation and stable operation.

The honeycomb mill is a continuous powder surface modification machine specifically designed for the surface modification or coating of ultrafine powder particles. It has advantages such as good dispersibility of the powder and surface modifier, equal contact opportunities, adjustable modification temperature, low energy consumption per unit product, no dust pollution, simple operation, and stable operation. The honeycomb mill advocates first depolymerizing and then drying, while synchronously treating the surface, which can meet the requirements for the coating modification of barium sulfate.

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