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Preparation method and application of elastic silicon dioxide composite aerogel material
The invention relates to a preparation method and application of an elastic silicon dioxide composite aerogel, and the composite aerogel is prepared by the following steps: carrying out in-situ polymerization on sodium silicate on the surface of cellulose nanofiber through freeze polymerization, and carrying out freeze casting and freeze drying. The freeze polymerization utilizes ice crystal confinement to enable the silicon dioxide nanoparticles to controllably grow on the surfaces of the cellulose nanofibers. The core-shell element structure with the cellulose nanofiber as the core and the silicon dioxide as the shell can effectively improve the high temperature resistance and the mechanical elasticity of the prepared composite aerogel, so that the composite aerogel can meet the thermal management application requirements in extreme high temperature and complex environments.
本发明涉及一种弹性二氧化硅复合气凝的制备方法及其应用，所述复合气凝胶先通过冷冻聚合使硅酸钠在纤维素纳米纤维表面原位聚合，在经过冷冻铸造和冷冻干燥，即得。冷冻聚合利用冰晶限域使二氧化硅纳米颗粒能够可控的生长在纤维素纳米纤维表面。这种以纤维素纳米纤维为核，二氧化硅为壳的核壳基元结构能够有效提升所制备复合气凝胶的耐高温性能和力学弹性，使其能够满足极端高温和复杂环境中的热管理应用需求。
Preparation method and application of elastic silicon dioxide composite aerogel material
The invention relates to a preparation method and application of an elastic silicon dioxide composite aerogel, and the composite aerogel is prepared by the following steps: carrying out in-situ polymerization on sodium silicate on the surface of cellulose nanofiber through freeze polymerization, and carrying out freeze casting and freeze drying. The freeze polymerization utilizes ice crystal confinement to enable the silicon dioxide nanoparticles to controllably grow on the surfaces of the cellulose nanofibers. The core-shell element structure with the cellulose nanofiber as the core and the silicon dioxide as the shell can effectively improve the high temperature resistance and the mechanical elasticity of the prepared composite aerogel, so that the composite aerogel can meet the thermal management application requirements in extreme high temperature and complex environments.
本发明涉及一种弹性二氧化硅复合气凝的制备方法及其应用，所述复合气凝胶先通过冷冻聚合使硅酸钠在纤维素纳米纤维表面原位聚合，在经过冷冻铸造和冷冻干燥，即得。冷冻聚合利用冰晶限域使二氧化硅纳米颗粒能够可控的生长在纤维素纳米纤维表面。这种以纤维素纳米纤维为核，二氧化硅为壳的核壳基元结构能够有效提升所制备复合气凝胶的耐高温性能和力学弹性，使其能够满足极端高温和复杂环境中的热管理应用需求。
Preparation method and application of elastic silicon dioxide composite aerogel material
一种弹性二氧化硅复合气凝胶材料的制备方法及其应用
ZHANG CHAO (author) / WANG YUFENG (author) / LIU TIANXI (author) / SUN JIAHUI (author) / ZHU TIANYI (author)
2024-06-18
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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