Material Drying
32 Aufrufe
PI aerogel preparation shrinkage and cracking
Problembeschreibung
PI aerogel shrinks severely after supercritical drying or freeze drying
Ursachenanalyse
The gel network strength is insufficient to withstand capillary forces during drying; solvent exchange insufficient
Lösung
Strengthen the gel network (increase crosslinking or polymerization concentration); fully exchange solvent; optimize drying conditions
Wichtigste Erkenntnis
The core of PI aerogel preparation is protecting the nanoporous structure
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