Calcium-Binding Membrane Influence on Polymorph and Morphology of Calcium Carbonate Formed by Biomimetic Mineralization

摘要

The typical conclusions can be drawn as follows:(1)Since vaterite was only formed on calcium-binding poly-(L-aspartate)-coated surface between 15 and 35 deg C,the carbonic anhydrase(CA)-arising activity of zinc array(i.e.,zinc-coordinated imidazolin-terminated silane monolayer,as shown in Chem.Eur.J.2003,9,3235)prevailed the temperature influence on the polymorph of calcium carbonate.Time evolution of calcium carbonate formation was enhanced by the zinc array.(2)The calcium carbonate crystallized only on imidazolin-and sulfonate-terminated silane membranes has shown a number of microspheres of 1 mu m more or less in diameter.(3)The higher temperature and higher pH induced aragonite formation at the sulfonate-terminated Nafion membrane in the presence of the above zinc array.(4)The observed morphology of aragonite or vaterite was similar to the spherulitic aragonite or vaterite formed by biological mineralization in marine organisms.