White carbon black, this seemingly simple white powder, contains a perfect combination of high technology and fine craftsmanship in its preparation process. From the selection of raw materials to the formation of the final product, every step embodies the wisdom and sweat of researchers.
Raw material selection: The main raw materials for the preparation of white carbon black are silicates such as sodium silicate (Na ₂ SiO ∝) or potassium silicate (K ₂ SiO ∝), as well as acids such as sulfuric acid (H ₂ SO ₄) or hydrochloric acid (HCl). High quality raw materials are the foundation for ensuring the quality of white carbon black.
Precipitation method preparation: Precipitation method is currently the most commonly used method for preparing white carbon black. By controlling the reaction conditions between silicates and acids, such as temperature, pH value, reaction time, etc., silica is precipitated in the form of a precipitate. Subsequently, after washing, drying, crushing and other processes, the final white carbon black product is obtained.
Sol gel method: This is a more advanced preparation method. White carbon black with specific pore structure and surface properties can be prepared by controlling the transformation process from sol to gel. The white carbon black prepared by this method has a higher specific surface area and better dispersibility, making it suitable for high-end application fields.
Surface modification: In order to improve the compatibility between white carbon black and the matrix material, surface modification treatment is usually required. By introducing specific functional groups on the surface of white carbon black through chemical or physical methods, it can better bond with matrix materials such as rubber and plastic, and enhance the overall performance of composite materials.
From raw materials to high-quality products, the preparation process of white carbon black is a perfect fusion of technology and art, showcasing humanity's profound understanding of materials science and the spirit of continuous exploration.