METHOD FOR PREPARING HYDROPHOBIC SILICA AEROGEL GRANULES

• Main Authors: LEE, Je Kyun, KIM, Young Hun, OH, Myung Eun
• Format: Patent
• Language: English; French; German
• Published: 05.04.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a method for producing hydrophobic silica aerogel granules and hydrophobic silica aerogel granules produced thereby, the hydrophobic silica aerogel granules which meet a require level in terms of industrial availability without the deterioration of specific surface area and the scattering properties of which is suppressed. According to the method for producing hydrophobic silica aerogel granules, surface modification, gelation, and solvent substitution may be simultaneously performed in one step, and thus, production time is short, so that productivity and economic feasibility may be excellent. Also, by adjusting the addition amount of a non-polar organic solvent when proceeding with a reaction, hydrophobic silica aerogel granules with suppressed scattering properties may be produced. In addition, the hydrophobic silica aerogel granules are silica aerogel particles induced to agglomerate with each other through physical bonding, so that there is an advantage in that the granules may be easily changed into a powder form, thereby having excellent industrial applicability.