Silicon dioxide particles, preparation method thereof and silicon rubber prepared from silicon dioxide particles

• Main Authors: ZHENG SONGLING, ZHANG YUNLONG, WANG XIANWEI, LIANG SHAOBIN, ZOU JIANTAO
• Format: Patent
• Language: Chinese; English
• Published: 28.04.2023
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; NON-METALLIC ELEMENTS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention discloses silicon dioxide particles, a preparation method thereof and silicon rubber prepared from the silicon dioxide particles. The preparation method of the silicon dioxide particles comprises the following steps: 1) adding water into sodium silicate to prepare a sodium silicate solution; 2) adding water into low-molecular-weight polyethylene glycol for dispersion, then adding a part of the sodium silicate solution, uniformly mixing, and then adding a sulfuric acid solution for reaction to obtain a silicon dioxide initial product dispersion liquid; and 3) dispersing high-molecular-weight polyethylene glycol in the silicon dioxide primary product dispersion liquid, adding a sodium silicate solution and a sulfuric acid solution for reaction, and then performing aging, filter pressing, washing, spray drying and crushing to obtain the silicon dioxide particles. The silicon dioxide particles are moderate in specific surface area, particle size and oil absorption value, are suitable for preparing t