Generation of silicone poly-HIPES with controlled pore sizes via reactive emulsion stabilization

Abstract

Macrocellular silicone polymers are obtained after solidification of the continuous phase of a PDMS (polydimethylsiloxane) emulsion, which contains PEG (polyethylene glycol) drops of sub-millimetric dimensions. Coalescence of the liquid template emulsion is prohibited by a reactive blending approach. We investigate in detail the relationship between the interfacial properties and the emulsion stability, and we use micro- and millifluidic techniques to generation macro-cellular polymers with controlled structural properties over a wider range of cell-sizes (0.2-2mm) and volume fractions of the continuous phase (0.1-40%). This approach could easily be transferred to a wide range of polymeric systems.

References in corpus (1)

• Onset of mechanical stability in random packings of frictional spheres

Cited by in corpus (2)

• Interfacial tension of reactive, liquid interfaces and its consequences
• Collapse and cavitation during drying of water-saturated PDMS sponges with closed porosity