Engineered Porous Materials
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Figure 1 compares a microporous polystyrene foam to a leached borosilicate glass. Although phase separation is evoked to explain the morphology of both systems, the resulting domain structure is distinctly different. The challenge is to understand these differences and exploit various chemical and physical processes to tailor porosity for specific applications. These processes often occur far from equilibrium, presenting new challenges to both modeling and processing.
Figure 1. A mesoporous carbon prepared by (a) thermally induced phase separation2 compared to (b) a leached borosilicate glass.20 Although microphase separation is believed to play a critical role in pore formation for both systems, distinctly different morphologies are observed.
Nomenclature The International Union of Pure and Applied Chemists (IUPAC) has recommended specific nomenclature56 for porous materials: microporous (pore diameter
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