Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing three-dimensional nanofiber ceramic aerogel through vortex field assisted electrostatic spinning
The invention discloses a method for preparing three-dimensional nanofiber ceramic aerogel by vortex field assisted electrostatic spinning. The method comprises the following steps: combining zirconium polyacetylacetonate powder with a phase stabilizer yttrium nitrate hexahydrate, introducing a silicon source silane coupling agent, and co-dissolving PEO in methanol to prepare a binary zirconium-silicon ceramic electrostatic spinning precursor with high spinnability; fully counteracting an electric orientation effect of a high-voltage electric field generated when precursor liquid drops are stretched into solid fibers in an electrostatic spinning process by utilizing high-voltage pulsating airflow of an eddy current field, so that the fibers are mutually wound and moved along a complex track in a space, and a binary zirconium-silicon nanofiber ceramic aerogel precursor with a three-dimensional zigzag laminated structure is prepared and formed; and finally, performing high-temperature crystallization and crosslinking to obtain the nanofiber ceramic aerogel with a complete shape structure. The preparation method is simple and easy to control, and the prepared zirconium silicate nanofiber ceramic aerogel has excellent mechanical elasticity, heat insulation characteristic and high-temperature thermal stability.
本发明公开一种涡流场辅助‑静电纺丝制备三维纳米纤维陶瓷气凝胶的方法，将聚乙酰丙酮合锆粉体结合相稳定剂六水合硝酸钇，同时引入硅源硅烷偶联剂，在甲醇中共溶PEO，制备具有高度可纺性的二元锆硅陶瓷静电纺丝前驱体后，利用涡流场高压脉动气流，充分抵消静电纺丝过程中前驱体液滴被拉伸成固体纤维时产生的高压电场电定向效应，使纤维在空间中沿复杂轨迹相互缠绕运动，制备成型具有三维锯齿状层叠结构的二元锆硅纳米纤维陶瓷气凝胶前体，最后经过高温结晶交联得到形状结构完好的纳米纤维陶瓷气凝胶。本发明制备方法简单易于控制，制备得到的硅酸锆纳米纤维陶瓷气凝胶具有优异的机械弹性、隔热特性和高温热稳定性。
Method for preparing three-dimensional nanofiber ceramic aerogel through vortex field assisted electrostatic spinning
The invention discloses a method for preparing three-dimensional nanofiber ceramic aerogel by vortex field assisted electrostatic spinning. The method comprises the following steps: combining zirconium polyacetylacetonate powder with a phase stabilizer yttrium nitrate hexahydrate, introducing a silicon source silane coupling agent, and co-dissolving PEO in methanol to prepare a binary zirconium-silicon ceramic electrostatic spinning precursor with high spinnability; fully counteracting an electric orientation effect of a high-voltage electric field generated when precursor liquid drops are stretched into solid fibers in an electrostatic spinning process by utilizing high-voltage pulsating airflow of an eddy current field, so that the fibers are mutually wound and moved along a complex track in a space, and a binary zirconium-silicon nanofiber ceramic aerogel precursor with a three-dimensional zigzag laminated structure is prepared and formed; and finally, performing high-temperature crystallization and crosslinking to obtain the nanofiber ceramic aerogel with a complete shape structure. The preparation method is simple and easy to control, and the prepared zirconium silicate nanofiber ceramic aerogel has excellent mechanical elasticity, heat insulation characteristic and high-temperature thermal stability.
本发明公开一种涡流场辅助‑静电纺丝制备三维纳米纤维陶瓷气凝胶的方法，将聚乙酰丙酮合锆粉体结合相稳定剂六水合硝酸钇，同时引入硅源硅烷偶联剂，在甲醇中共溶PEO，制备具有高度可纺性的二元锆硅陶瓷静电纺丝前驱体后，利用涡流场高压脉动气流，充分抵消静电纺丝过程中前驱体液滴被拉伸成固体纤维时产生的高压电场电定向效应，使纤维在空间中沿复杂轨迹相互缠绕运动，制备成型具有三维锯齿状层叠结构的二元锆硅纳米纤维陶瓷气凝胶前体，最后经过高温结晶交联得到形状结构完好的纳米纤维陶瓷气凝胶。本发明制备方法简单易于控制，制备得到的硅酸锆纳米纤维陶瓷气凝胶具有优异的机械弹性、隔热特性和高温热稳定性。
Method for preparing three-dimensional nanofiber ceramic aerogel through vortex field assisted electrostatic spinning
一种涡流场辅助-静电纺丝制备三维纳米纤维陶瓷气凝胶的方法
XU XIANG (Autor:in) / LI HUI (Autor:in) / GUO JINGRAN (Autor:in) / FU SHUBIN (Autor:in) / LIU DIZHOU (Autor:in)
23.07.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
D01D
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
,
Mechanische Verfahren oder Vorrichtungen für die Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
/
D01F
Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
,
CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
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