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Preparation method of aerogel particles for thermal insulation material
The invention discloses a preparation method of aerogel particles for a thermal insulation material, which comprises the following steps: mixing raw materials: uniformly mixing a silicon source, a modifier, an alcohol reagent and water to form a mixed solution A; adding a catalyst: adding the catalyst into the mixed solution A to form a mixed solution B; gelling: gelling the mixed solution B; the gel temperature is 20-35 DEG C, and the gel humidity is 30-60% RH; performing granulation: when the hardness value of the gel is 20-70F, performing granulation; aging: adding the granulated gel particles into an alcohol aging solution for aging; and drying: carrying out supercritical drying on the aged gel particles to form aerogel particles. According to the method, the granulation time is determined by monitoring the granulation hardness, granulation is performed under the appropriate hardness, and the gel is not excessively crushed or is not crushed insufficiently in the granulation process; meanwhile, the temperature and humidity of the gel are regulated and controlled, so that the gel keeps proper elasticity, more uniform aerogel particles can be obtained, and the yield of the particles with the particle size of 1-4 mm can be increased.
本发明公开了一种可用于保温材料的气凝胶颗粒的制备方法，包括以下步骤：混合原料：将硅源、改性剂、醇类试剂、水混合均匀，形成混合液A；加催化剂：向混合液A中加入催化剂，形成混合液B；凝胶：对混合液B进行凝胶；凝胶温度为20～35℃，凝胶湿度为30％～60％RH；造粒：当凝胶硬度值为20～70F时，进行造粒；老化：将造粒后的凝胶颗粒加入醇类老化液中老化；干燥：将老化后的凝胶颗粒进行超临界干燥，形成气凝胶颗粒。本发明通过监控造粒硬度，确定造粒时机，在合适的硬度下造粒，凝胶在造粒过程中不至于被过度粉碎或被粉碎不足；同时，调控凝胶温度和湿度，使凝胶保持合适的弹性，更有利于获得更加均匀的的气凝胶颗粒以及提高1～4mm粒径颗粒的收率。
Preparation method of aerogel particles for thermal insulation material
The invention discloses a preparation method of aerogel particles for a thermal insulation material, which comprises the following steps: mixing raw materials: uniformly mixing a silicon source, a modifier, an alcohol reagent and water to form a mixed solution A; adding a catalyst: adding the catalyst into the mixed solution A to form a mixed solution B; gelling: gelling the mixed solution B; the gel temperature is 20-35 DEG C, and the gel humidity is 30-60% RH; performing granulation: when the hardness value of the gel is 20-70F, performing granulation; aging: adding the granulated gel particles into an alcohol aging solution for aging; and drying: carrying out supercritical drying on the aged gel particles to form aerogel particles. According to the method, the granulation time is determined by monitoring the granulation hardness, granulation is performed under the appropriate hardness, and the gel is not excessively crushed or is not crushed insufficiently in the granulation process; meanwhile, the temperature and humidity of the gel are regulated and controlled, so that the gel keeps proper elasticity, more uniform aerogel particles can be obtained, and the yield of the particles with the particle size of 1-4 mm can be increased.
本发明公开了一种可用于保温材料的气凝胶颗粒的制备方法，包括以下步骤：混合原料：将硅源、改性剂、醇类试剂、水混合均匀，形成混合液A；加催化剂：向混合液A中加入催化剂，形成混合液B；凝胶：对混合液B进行凝胶；凝胶温度为20～35℃，凝胶湿度为30％～60％RH；造粒：当凝胶硬度值为20～70F时，进行造粒；老化：将造粒后的凝胶颗粒加入醇类老化液中老化；干燥：将老化后的凝胶颗粒进行超临界干燥，形成气凝胶颗粒。本发明通过监控造粒硬度，确定造粒时机，在合适的硬度下造粒，凝胶在造粒过程中不至于被过度粉碎或被粉碎不足；同时，调控凝胶温度和湿度，使凝胶保持合适的弹性，更有利于获得更加均匀的的气凝胶颗粒以及提高1～4mm粒径颗粒的收率。
Preparation method of aerogel particles for thermal insulation material
一种可用于保温材料的气凝胶颗粒的制备方法
XIN ZHUOHAN (author) / ZHANG MENG (author) / DU QUANLING (author) / WANG JIANHENG (author)
2024-10-18
Patent
Electronic Resource
Chinese
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