Emulsion-templated polymer beads have been prepared by oil-in-water-in-oil (O/W/O) sedimentation polymerization. The materials exhibit well-defined macropore structures (2−15 μm) and high pore volumes (up to 8 cm3/g). The beads have monodisperse size distributions (<3%) because the droplets are isolated from one another during sedimentation, thus eliminating droplet collision and exchange.
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Zhang et al. (2002) studied this question.
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