Ultra-fine active silica powder is a high-end product obtained by surface modification of ultrafine silica powder. For ultrafine powders, activation treatment has dual importance: first, to improve compatibility and bonding force with organic systems, exerting reinforcing functions; second, to reduce the extremely high surface energy of ultrafine particles, alleviating their agglomeration tendency, enabling them to achieve truly nano-scale uniform dispersion in practical applications.
This product is a sharp tool for the functional design of high-performance composite materials. By selecting coupling agents with different functional groups, the powder can be endowed with specific properties directionally, such as hydrophobicity, lipophilicity, and reactivity with specific resins. This allows material engineers to design the performance of composite materials like "building blocks". For example, when preparing high thermal conductivity silicone rubber, using Ultra-fine active silica powder treated with special coupling agents can build an efficient three-dimensional thermal network in the silicone rubber matrix while maintaining the flexibility of the rubber. In manufacturing high-performance composite membranes (e.g., battery separators or filter membranes), adding Ultra-fine active silica powder can improve the strength, porosity, and surface characteristics of the membrane. In high-end adhesives, it can simultaneously provide reinforcement, thixotropy, thermal conductivity, and other functions. The emergence of Ultra-fine active silica powder has transformed fillers from passive "extenders" to active "functional modifiers," opening up broad space for the development of new materials.
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