Material Drying
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PI aerogel preparation shrinkage and cracking
Fenómeno del problema
PI aerogel shrinks severely after supercritical drying or freeze drying
Análisis de la causa
The gel network strength is insufficient to withstand capillary forces during drying; solvent exchange insufficient
Solución
Strengthen the gel network (increase crosslinking or polymerization concentration); fully exchange solvent; optimize drying conditions
Conclusión clave
The core of PI aerogel preparation is protecting the nanoporous structure
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