Abstract
E-glass fiber with diameter of 11–12 μm was prepared and treated in hot dilute hydrochloric acid solution to prepare microporous glass. The surface was leached with 1 mol/l acid and microporous layer was formed. The pore volume and specific surface area of the porous layer initially increased, reached maxima and then decreased with acid treatment. Micropores developed by leaching collapsed after prolonged acid treatment as a result of structural transformation of the leached layer. The leach rate of soluble components decreased with the disappearance of micropores. The pore structure of the fibers treated with 4 mol/l acid altered similarly while the fibers were completely leached in a short period.
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