| abstract |
The invention provides a mesoporous PI aerogel and a preparation method thereof. First, a fully cross-linked PI wet gel is prepared by a chemical imidization method, and then a wet gel using tert-butanol as an aging solution is obtained by solvent replacement. gel, and finally obtain a PI aerogel with mesoporous structure by freeze-drying technology. The method of the invention is simple, and the prepared mesoporous aerogel material has large specific surface area and high porosity. It is a preparation method of PI aerogel with low production cost and high specific surface area, which is expected to realize industrial application. |