Nanotechnology Empowerment: Surface Modification and Application Expansion of Precipitation Method White Carbon Black


The unmodified precipitated white carbon black has high surface hydroxyl content, easy aggregation, and strong hydrophilicity, which limits its application in non-polar media. This article explores the latest developments in surface modification technology, including silane coupling agent grafting, polymer coating, plasma treatment, etc. For example, through gas phase modification with hexamethyldisilazane (HMDS), the hydroxyl groups on the surface of white carbon black are replaced by methyl groups, and the contact angle is increased from<10 ° to>120 °. The dispersibility in silicone oil is significantly improved, and it can achieve a balance between "matte texture" and "long-lasting makeup" when applied to high-end cosmetics. In the field of coatings, modified white carbon black is used as a matting agent to reduce the glossiness of varnish from 80% to 10%, while improving scratch resistance by 30%. Technological breakthroughs have opened up new paths for the application of white carbon black in high value-added fields such as electronic packaging and biomedicine.