Choose surface modifier, mainly look at these 3 aspects!
Modifiers are the key to achieve the intended purpose of powder surface modification, but there are many types and strong pertinence. From the point of view of the interaction between the surface modifier molecules and the surface of the inorganic powder, the surface modifier that can chemically react or chemically adsorb with the surface of the powder particles should be selected as much as possible, because the physical adsorption is strong in the subsequent application process. Easy to desorb under stirring or squeezing.
However, other factors must also be considered in the actual selection, such as product use, product quality standards or requirements, modification process, cost, environmental protection, etc.
Selection factor 1: The purpose of the product
This is the most important consideration in selecting the variety of surface modifiers, because different application fields have different technical requirements for powder application properties, such as surface wettability, dispersion, pH value, electrical properties, weather resistance, gloss, antibacterial properties This is one of the reasons for selecting the variety of surface modifiers according to the application.
Selection factor 2: Modification process
The modification process is also one of the important considerations in selecting the variety of surface modifiers. The current surface modification process mainly adopts dry method and wet method.
For the dry process, it is not necessary to consider its water solubility; but for the wet process, the water solubility of the surface modifier should be considered, because only water-soluble can fully contact and react with powder particles in a wet environment.
Selection factor 3: price and environmental factors
Finally, the selection of surface modifiers should also consider price and environmental factors. On the premise of meeting application performance requirements or application performance optimization, try to use cheaper surface modifiers to reduce the cost of surface modification. At the same time, attention should be paid to the selection of surface modifiers that do not pollute the environment.