Material Drying
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PI aerogel preparation shrinkage and cracking
Fenómeno do problema
PI aerogel shrinks severely after supercritical drying or freeze drying
Análise das causas
The gel network strength is insufficient to withstand capillary forces during drying; solvent exchange insufficient
Solução
Strengthen the gel network (increase crosslinking or polymerization concentration); fully exchange solvent; optimize drying conditions
Conclusão principal
The core of PI aerogel preparation is protecting the nanoporous structure
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