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Yuan Lei tells you about the characteristics and scope of application of the powder dry surface modification process.

Release time:

2024-01-29 09:35

 

Yuan Lei tells you about the characteristics and scope of application of the powder dry surface modification process.

 

Dry surface modification process refers to the powder in the dry state or after drying in the surface modification equipment for dispersion, while adding a well-configured surface modifier, at a certain temperature for surface modification treatment process. inorganic powderSurface physical coating, chemical coating, mechanochemical and partial encapsulation modificationThis process is often used.

 

 

Dry surface modification process can be divided into two kinds of intermittent and continuous.

 

1. Intermittent surface modification process

 

Intermittent surface modification process is the measurement of good powder raw materials and a certain amount of configuration of the surface modifier at the same time into the surface modification equipment, at a certain temperature for a certain time of surface modification treatment, and then discharge the treated materials, and then add the next batch of powder surface modification.

 

Features:Since the powder material is surface modified in batches, the intermittent surface modification process is characterized by the flexibility to adjust the surface modification treatment time in a large range. However, because the surface modification of powder is the adsorption and reaction process of a very small amount of surface modifier on the surface of a large number of powder, in order to make the surface modifier more evenly coated on the surface of the powder material, the surface modifier should be diluted. The disadvantages of the intermittent surface modification process are that the labor intensity is high, the production efficiency is low, and it is difficult to adapt to large-scale industrial production.

 

Scope of application:Generally suitable for small-scale industrial production and laboratory surface modifier formulation test research.

 

2, Continuous surface modification process

 

The continuous surface modification process refers to the process of continuous feeding and continuous addition of surface modifiers. Therefore, in the continuous powder surface modification process, in addition to the modified host equipment, there are continuous feeding devices and dosing (adding surface modifiers) devices.

 

Features:The surface modifier can not be diluted, the dispersion of powder and surface modifier is better, and the surface coating of powder is more uniform; because of continuous feeding and adding surface modifier, the labor intensity is small, the production efficiency is high, and it is suitable for large-scale industrial production.

 

Scope of application:This dry surface modification process is often set after the dry powder preparation process, large-scale continuous production of a variety of surface modified industrial powder, especially for plastics, rubber, adhesives and other polymer-based composite materials inorganic active filler.

 

The dry surface modification process is applicable to various organic surface modifiers, especially various surface modifiers that are not water soluble.

 

In the dry modification process, the main process parameters are.Modification temperature, effect of powder and surface modifier or residence time. The dispersion of the surface modifier and the uniformity of the surface coating in the dry process largely depend on the surface modification equipment.

Modification, surface, process, modifier, dry, continuous, conduct, production, batch

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