Cartilage

Supercritical CO2


The foaming of these polymers relies on the following principles:

  • The polymer is saturated with carbon dioxide at high pressure
  • The polymer/gas mixture is quenched into a supersaturated state by reducing the pressure
  • Nucleation and growth of gas bubbles dispersed throughout the sample evolves until all thermodynamic forces driving mass transport vanish and we are left with a porous structure

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