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The invention discloses a method for preparing cristobalite micro-nano fiber aerogel based on potassium hexatitanate induction, which comprises the following steps: adding PTW powder into a polyvinylpyrrolidone aqueous solution, stirring, then adding phosphoric acid to adjust the pH value, adding tetraethyl silicate after the pH value is adjusted, and stirring to obtain a spinning solution; centrifugally spinning the spinning solution, and sintering in a muffle furnace at high temperature to obtain the christobalite micro-nano fiber aerogel. The high-temperature-resistant cristobalite nanofiber aerogel material is obtained by doping PTW into raw materials to induce SiO2 nanofibers to form crystal SiO2 fibers, the cristobalite nanofiber aerogel material keeps low heat conduction performance and has good mechanical performance, in addition, by inducing SiO2 micro-nanofiber aerogel to form cristobalite micro-nanofiber aerogel, the thermal conductivity of the cristobalite nanofiber aerogel material is improved, and the thermal conductivity of the cristobalite nanofiber aerogel material is improved. The advantages of crystal SiO2 and the advantages of fiber aerogel are combined, and the problems that SiO2 micro-nanofiber aerogel collapses at the temperature of 1300 DEG C or above, and the mechanical property becomes poor are solved.
本发明公开了一种基于六钛酸钾诱导制备方英石微纳米纤维气凝胶的方法，所述方法包括以下步骤：将PTW粉末加入到聚乙烯吡咯烷酮水溶液中，搅拌，然后加入磷酸调节pH，调节pH后加入硅酸四乙酯，搅拌，然后得到纺丝液；纺丝液离心纺丝后放入马弗炉中进行高温烧结后，得到所述方英石微纳米纤维气凝胶。本发明通过在原料中掺杂PTW诱导SiO2纳米纤维形成晶体SiO2纤维，得到耐高温方英石纳米纤维气凝胶材料，其保持低导热性能的同时具有良好的机械性能，此外，通过诱导SiO2微纳米纤维气凝胶形成方英石微纳米纤维气凝胶，将晶体SiO2的优点与纤维气凝胶的优点结合，突破了SiO2微纳米纤维气凝胶在1300℃以上坍缩、力学性能变差的问题。
The invention discloses a method for preparing cristobalite micro-nano fiber aerogel based on potassium hexatitanate induction, which comprises the following steps: adding PTW powder into a polyvinylpyrrolidone aqueous solution, stirring, then adding phosphoric acid to adjust the pH value, adding tetraethyl silicate after the pH value is adjusted, and stirring to obtain a spinning solution; centrifugally spinning the spinning solution, and sintering in a muffle furnace at high temperature to obtain the christobalite micro-nano fiber aerogel. The high-temperature-resistant cristobalite nanofiber aerogel material is obtained by doping PTW into raw materials to induce SiO2 nanofibers to form crystal SiO2 fibers, the cristobalite nanofiber aerogel material keeps low heat conduction performance and has good mechanical performance, in addition, by inducing SiO2 micro-nanofiber aerogel to form cristobalite micro-nanofiber aerogel, the thermal conductivity of the cristobalite nanofiber aerogel material is improved, and the thermal conductivity of the cristobalite nanofiber aerogel material is improved. The advantages of crystal SiO2 and the advantages of fiber aerogel are combined, and the problems that SiO2 micro-nanofiber aerogel collapses at the temperature of 1300 DEG C or above, and the mechanical property becomes poor are solved.
本发明公开了一种基于六钛酸钾诱导制备方英石微纳米纤维气凝胶的方法，所述方法包括以下步骤：将PTW粉末加入到聚乙烯吡咯烷酮水溶液中，搅拌，然后加入磷酸调节pH，调节pH后加入硅酸四乙酯，搅拌，然后得到纺丝液；纺丝液离心纺丝后放入马弗炉中进行高温烧结后，得到所述方英石微纳米纤维气凝胶。本发明通过在原料中掺杂PTW诱导SiO2纳米纤维形成晶体SiO2纤维，得到耐高温方英石纳米纤维气凝胶材料，其保持低导热性能的同时具有良好的机械性能，此外，通过诱导SiO2微纳米纤维气凝胶形成方英石微纳米纤维气凝胶，将晶体SiO2的优点与纤维气凝胶的优点结合，突破了SiO2微纳米纤维气凝胶在1300℃以上坍缩、力学性能变差的问题。
Method for preparing cristobalite micro-nanofiber aerogel based on potassium hexatitanate induction
基于六钛酸钾诱导制备方英石微纳米纤维气凝胶的方法
ZHOU JIAN (author)
2024-11-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
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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