Abstract
DC conductivity percolation on drying to air in water-moistened SBA-15 was characterized. The percolation exponent value, μh≈1, is typical for hydrophilic fumed silica and biological porous materials. Somewhat surprisingly, we found that the percolation water content threshold depends linearly of the initial hydration of dry SBA-15 material. The finding is rationalized within the concept of morphological wetting transition at hydrophilic/phobic structured interface of moistened SBA-15.
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