A novel active polystyrene (PS) membrane was prepared with amphiphilic polystyrene-b-poly(acrylic acid) (PAS) molecules fixed on its surface. The membrane was characterized with FT-IR. The active surface (lower surfac...A novel active polystyrene (PS) membrane was prepared with amphiphilic polystyrene-b-poly(acrylic acid) (PAS) molecules fixed on its surface. The membrane was characterized with FT-IR. The active surface (lower surface) of the membrane could act as a template to induce heterophase crystal nucleation of CaCO3. Optical microscopy and SEM were used to characterize the CaCO3 crystals. Crystals with different morphologies (cubic, hexagon and spindle shaped) were found on the active membrane after it induced CaCO3 crystallization. The templating effect is consistent with the hydrophile of the active surface characterized by water droplets. Both the templating effect and the hydrophile of the active surface could be regulated by PAS concentration and pH in the membrane preparation.展开更多
文摘A novel active polystyrene (PS) membrane was prepared with amphiphilic polystyrene-b-poly(acrylic acid) (PAS) molecules fixed on its surface. The membrane was characterized with FT-IR. The active surface (lower surface) of the membrane could act as a template to induce heterophase crystal nucleation of CaCO3. Optical microscopy and SEM were used to characterize the CaCO3 crystals. Crystals with different morphologies (cubic, hexagon and spindle shaped) were found on the active membrane after it induced CaCO3 crystallization. The templating effect is consistent with the hydrophile of the active surface characterized by water droplets. Both the templating effect and the hydrophile of the active surface could be regulated by PAS concentration and pH in the membrane preparation.
