Fumed Silica Powder Supplier for Rheology and Reinforcement
KOSNANO fumed silica powder is a premium synthetic amorphous silicon dioxide ，which featuring a 3D chain-like nano-structure, with 99.8% chemical purity and zero crystalline quartz. it engineered via high-temperature flame hydrolysis. Our industrial silica grains range from 7 nm to 40 nm in primary particle size with an extensive specific surface area (BET) spanning 100 m2/g to 380 m2/g. We can offer hydrophilic and hydrophobic surface modifications for you , KOSNANO fumed silica acts as a highly efficient rheology control agent, anti-settling additive, and thickening filler for international coatings, adhesives, plastics formulations and cosmetics solutions
Technical Specifications & Primary Particle Size Controls
What are the distinct performance differences between KOSNANO's 7nm and 20nm fumed silica powder grades?
Our ultra-fine Fumed Silica 7nm grade features an exceptional specific surface area exceeding 300 m2/g, providing maximum transparent thickening and mechanical reinforcement in complex liquid polymers. For standard industrial applications, our Fumed Silica 20nm grade delivers a balanced surface chemistry with a specific surface area of 200 +/- 20 m2/g, optimizing anti-sagging performance in industrial marine coatings. The larger primary particle size grades up to 40 nm provide superb free-flow processing properties, functioning as a reliable anti-caking agent for heavy-duty industrial powder compounding.
Surface Modification: Hydrophilic vs Hydrophobic Rheology Control
How do hydrophilic and hydrophobic fumed silica grades differ in industrial formulation systems?
Hydrophilic fumed silica contains active surface silanol groups that form strong hydrogen-bonded networks, generating excellent thixotropic thickening in polar solvents such as water, alcohols, and epoxy resins. Conversely, our hydrophobic fumed silica powder undergoes chemical post-treatment with dimethyldichlorosilane (DDS) or silicone oil, reduces moisture adsorption below 1.0%, and provides stable anti-settling effects in non-polar polyurethane and automotive clearcoats. Both surface variations are completely non-hazardous, ensuring an ignition weight loss of less than 2.5% during rigorous thermal stability tests.
Related Products
Fumed Silica powder 40nm
No matter your hydrophobic silica application, our team will provide you with the optimal solution. Whether you’ve previously used Evonik (Degussa) AEROSIL models AEROSIL 90, 130, 200, or R972; Cabot’s CAB-O-SIL M5, CAB-O-SIL TS-720; or Wacker’s HDK N20 or HDK H20, we have the right product for you. KOSNANO is not only your expert solution provider for high-end silica materials, but also offers comprehensive optimization in terms of price, quality, and logistics.