Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing polymer converted ceramic aerogel
The invention provides a method for preparing a polymer converted ceramic aerogel. The preparation method comprises the following steps: mixing a ceramic precursor polymer and an organic compound containing a C=C functional group in proportion, adding a solvent, adding a Pt-containing organic catalyst, and uniformly conducting mixing to prepare an organic solution; loading the organic solution into a reaction kettle, conducting heating, preserving heat, and conducting cooling to obtain wet gel; placing the wet gel in a container with holes, immersing the wet gel in a replacement solvent, and carrying out dynamic replacement by stirring; and conducting drying and annealing at high temperature. According to the dynamic replacement method, on the premise that the complete aerogel structure is guaranteed, solvent molecule movement is accelerated, the solvent replacement efficiency is greatly improved, and the aerogel precursor subjected to solvent dynamic replacement is subjected to high-temperature heat treatment to obtain the ceramic aerogel with the advantages of being light in weight, porous, large in specific surface area and the like. The method is simple in technological process, easy and convenient to operate, low in cost, short in replacement period and high in replacement efficiency, the specific surface area of the prepared aerogel is large, and industrial production can be achieved easily.
本发明提供了一种制备聚合物转化陶瓷气凝胶的方法。将陶瓷前驱体聚合物和含C＝C官能团的有机化合物按比例混合，加入溶剂，再加入含Pt有机催化剂混合均匀制得有机溶液；将有机溶液装入反应釜中，升温保温，冷却后得到湿凝胶；将湿凝胶放置在带孔的容器内，并浸没到置换溶剂中，通过搅拌进行动态置换；再干燥并高温退火制得。本发明所述动态置换方法是在保证气凝胶结构完整前提下，加速溶剂分子运动，大大提高溶剂置换效率，将所述通过溶剂动态置换的气凝胶前驱体再通过高温热处理后得到具有质轻、多孔、比表面积大等优点的陶瓷气凝胶；本发明工艺流程简单、操作简便、成本低、置换周期短、置换效率高、所制备气凝胶的比表面积大，有利于实现工业化生产。
Method for preparing polymer converted ceramic aerogel
The invention provides a method for preparing a polymer converted ceramic aerogel. The preparation method comprises the following steps: mixing a ceramic precursor polymer and an organic compound containing a C=C functional group in proportion, adding a solvent, adding a Pt-containing organic catalyst, and uniformly conducting mixing to prepare an organic solution; loading the organic solution into a reaction kettle, conducting heating, preserving heat, and conducting cooling to obtain wet gel; placing the wet gel in a container with holes, immersing the wet gel in a replacement solvent, and carrying out dynamic replacement by stirring; and conducting drying and annealing at high temperature. According to the dynamic replacement method, on the premise that the complete aerogel structure is guaranteed, solvent molecule movement is accelerated, the solvent replacement efficiency is greatly improved, and the aerogel precursor subjected to solvent dynamic replacement is subjected to high-temperature heat treatment to obtain the ceramic aerogel with the advantages of being light in weight, porous, large in specific surface area and the like. The method is simple in technological process, easy and convenient to operate, low in cost, short in replacement period and high in replacement efficiency, the specific surface area of the prepared aerogel is large, and industrial production can be achieved easily.
本发明提供了一种制备聚合物转化陶瓷气凝胶的方法。将陶瓷前驱体聚合物和含C＝C官能团的有机化合物按比例混合，加入溶剂，再加入含Pt有机催化剂混合均匀制得有机溶液；将有机溶液装入反应釜中，升温保温，冷却后得到湿凝胶；将湿凝胶放置在带孔的容器内，并浸没到置换溶剂中，通过搅拌进行动态置换；再干燥并高温退火制得。本发明所述动态置换方法是在保证气凝胶结构完整前提下，加速溶剂分子运动，大大提高溶剂置换效率，将所述通过溶剂动态置换的气凝胶前驱体再通过高温热处理后得到具有质轻、多孔、比表面积大等优点的陶瓷气凝胶；本发明工艺流程简单、操作简便、成本低、置换周期短、置换效率高、所制备气凝胶的比表面积大，有利于实现工业化生产。
Method for preparing polymer converted ceramic aerogel
一种制备聚合物转化陶瓷气凝胶的方法
LI QUAN (Autor:in) / ZHANG JIANHAO (Autor:in) / YANG JIAN (Autor:in) / WANG ZHICHENG (Autor:in) / CHEN CHAO (Autor:in)
28.01.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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