分散剂的五大功能

分散剂是一种表面活性剂，可以减少分散体系中固体或液体颗粒的聚集. 通过吸附在颗粒表面形成保护层 (例如聚合物链的空间位阻效应) or introducing the same charge (electrostatic repulsion), a repulsive force is generated between particles, effectively preventing them from approaching each other and aggregating. Further enhance the dispersion stability of the system. It is widely applied in fields such as coatings, 油墨, pharmaceuticals, and the food industry.

分散剂

The main function of dispersants is to prevent particle agglomeration and enhance the stability and uniformity of the system by adsorbing on the surface of particles to form a double electric layer or a high-molecular chain that wraps around the particles. According to its characteristics such as dispersion, stability, wetting, viscosity, prevention of sedimentation and enhancement of luster. The five core functions of dispersants have been sorted out as follows:

1. Dispersion effect: 打散颗粒聚集体以实现初级颗粒的均匀分布.
2. 稳定作用: 防止已分散颗粒的再絮凝或沉降, 保持长期稳定性.
3. 润湿作用: 促进液体对固体颗粒的润湿, 置换颗粒表面的空气或杂质, 并增强界面相容性.
4. 黏度调节功能: 优化体系的流变性能, 在高固含量下降低粘度, 并改善流动性和可加工性.
5. 空间位阻/静电稳定作用: 通过物理或电化学机制在颗粒之间提供排斥力以维持分散状态.

分散剂厂家

这些作用通常协同发生, 具体主导机制取决于分散剂类型 (如阴离子型, 非离子型, 聚合物, 等。) and the application system (water-based/oil-based, 颜料, ceramic slurries, 涂料, 等。).