Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of polymer converted SiC/Cf aerogel
The invention discloses a preparation method of a polymer converted SiC/Cf aerogel. The method specifically comprises the following steps: pretreating carbon fibers; preparing precursor slurry, and carrying out hydrothermal treatment on the precursor slurry; stirring and mixing the precursor slurry at a high speed; sequentially carrying out ultrasonic treatment and freezing treatment on the mixed precursor slurry to obtain a cylindrical composite frozen body Fn; freeze-drying the cylindrical composite frozen body Fn to obtain a porous green body; carrying out curing treatment on the obtained porous green body; and placing the cured porous blank in a vacuum tube furnace for pyrolysis to obtain the polymer converted SiC/Cf aerogel. The invention relates to a preparation method of a polymer converted SiC/Cf aerogel. The SiC ceramic is converted by a polymer to serve as a fiber node, so that the problem of agglomeration of existing aerogel during high-temperature service is solved, the thermal insulation performance is better, and the preparation process is simple.
本发明公开了一种聚合物转化SiC/Cf气凝胶的制备方法，具体为：碳纤维前处理、配制先驱体浆料、将先驱体浆料进行水热处理、搅拌加高速搅拌混合先驱体浆料、将混合先驱体浆料依次进行超声处理、冷冻处理，得到的圆柱状复合冻结体Fn、将圆柱状复合冻结体Fn进行冷冻干燥，得到多孔坯体、将得到的多孔坯体进行固化处理、将固化后的多孔坯体置于真空管式炉中热解得到聚合物转化SiC/Cf气凝胶。本发明的一种聚合物转化SiC/Cf气凝胶的制备方法，利用聚合物转化SiC陶瓷做为纤维结点，解决了现有气凝胶在高温服役时出现团聚的问题，其隔热性能更优且制备工艺简单。
Preparation method of polymer converted SiC/Cf aerogel
The invention discloses a preparation method of a polymer converted SiC/Cf aerogel. The method specifically comprises the following steps: pretreating carbon fibers; preparing precursor slurry, and carrying out hydrothermal treatment on the precursor slurry; stirring and mixing the precursor slurry at a high speed; sequentially carrying out ultrasonic treatment and freezing treatment on the mixed precursor slurry to obtain a cylindrical composite frozen body Fn; freeze-drying the cylindrical composite frozen body Fn to obtain a porous green body; carrying out curing treatment on the obtained porous green body; and placing the cured porous blank in a vacuum tube furnace for pyrolysis to obtain the polymer converted SiC/Cf aerogel. The invention relates to a preparation method of a polymer converted SiC/Cf aerogel. The SiC ceramic is converted by a polymer to serve as a fiber node, so that the problem of agglomeration of existing aerogel during high-temperature service is solved, the thermal insulation performance is better, and the preparation process is simple.
本发明公开了一种聚合物转化SiC/Cf气凝胶的制备方法，具体为：碳纤维前处理、配制先驱体浆料、将先驱体浆料进行水热处理、搅拌加高速搅拌混合先驱体浆料、将混合先驱体浆料依次进行超声处理、冷冻处理，得到的圆柱状复合冻结体Fn、将圆柱状复合冻结体Fn进行冷冻干燥，得到多孔坯体、将得到的多孔坯体进行固化处理、将固化后的多孔坯体置于真空管式炉中热解得到聚合物转化SiC/Cf气凝胶。本发明的一种聚合物转化SiC/Cf气凝胶的制备方法，利用聚合物转化SiC陶瓷做为纤维结点，解决了现有气凝胶在高温服役时出现团聚的问题，其隔热性能更优且制备工艺简单。
Preparation method of polymer converted SiC/Cf aerogel
一种聚合物转化SiC/Cf气凝胶的制备方法
LI FUPING (Autor:in) / ZHAO LINNA (Autor:in) / ZHAO KANG (Autor:in) / DANG WEI (Autor:in) / XU ZHUOLI (Autor:in) / TANG YUFEI (Autor:in)
11.01.2022
Patent
Elektronische Ressource
Chinesisch
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