Macroporous microspheres and microspheroidal particles from polyhydromethylsiloxane
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- Pospiech, P., Chojnowski, J., Mizerska, U. et al. Colloid Polym Sci (2017) 295: 939. doi:10.1007/s00396-017-4075-z
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Polysiloxane macroporous microspheres and macroporous spheroidal particles were generated from a linear siloxane polymer using a simple emulsion procedure. Osmotic pressure produced by nano-dispersed ionic salt solution in polysiloxane droplets formed in aqueous emulsion is proposed as a mechanism of macropore formation. The competition between cross-linking of the polymer and osmotic swelling of the microspheres governs the shape and porosity of the particles which were characterized by SEM, 29Si MAS NMR, mercury intrusion porosimetry, and X-ray computed tomography.