The surface modification of non-metallic powders is a targeted modification of their original physical and chemical properties based on the application needs of polymer products. It involves using surface chemistry methods to adsorb and chemically react the functional groups in organic molecules on the surface of non-metallic particles, thereby organifying the surface of non-metallic powders and achieving the purpose of surface modification.
Silane coupling agents are a commonly used type of surface modifier in non-metallic powder surface modification. To make good use of silane coupling agents, it is necessary to carefully study their surface modification mechanisms and select the appropriate type of silane.
Silane coupling agents are a type of organic silicon compound with a special structure that contains two different chemical functional groups. Among these two distinct functional groups, the Y group is the most important, which has a significant impact on the performance of organic polymer products and plays a decisive role in determining the performance of the coupling agent. Only when the Y group can react well with the corresponding organic polymer material, can the performance of its substrate be improved.
The general requirement is that the Y group should be well soluble in organic polymer materials and able to act as a coupling agent. Therefore, appropriate Y group silane coupling agents should be considered for different organic polymer materials.
Choosing the appropriate silicone is crucial for different substrates or processed objects. Due to the fact that surface modification of non-metallic powders mainly solves the dispersion problem of non-metallic powders; The second issue is the interface bonding between powders and organic polymer materials; The third issue is the functionalization and specialization of powder surface modification.
The use of organosilicon can basically solve the above problems. However, it is necessary to make a correct and targeted selection based on the structural characteristics of silane and its interaction mechanism with non-metallic powders, as well as the properties of downstream organic polymer products' base materials, main formulations, process technology requirements, and the physical and chemical properties of non-metallic powders.
Surface modification of non-metallic powders is an important means of deep processing. To do a good job in surface modification of powders, the mechanism of surface modification should be taken as the basis, and the main formula of downstream organic polymers and products should be considered. Silane and compound special coupling agents should be selected reasonably; Secondly, it is necessary to consider determining suitable surface modification processes; Thirdly, the selection and matching of surface modification equipment should be based on the mechanism and process of surface modification.
