活性聚苯乙烯膜诱导碳酸钙异相成核结晶

0引言生物矿物材料(如骨、牙齿、贝壳等)的优异性能1]使得无机材料的仿生合成(又称有机模板合成)成为近年来研究的热点之一2]。该合成技术的优点是,通过有机物分子与无机离子的相互作用,能够在温和的条件下合成出具有多级结构、特殊形貌和优异性能的有机/无机复合材料。CaCO3

Heterophase Crystal Nucleation of CaCO3Induced by a Novel Active Polystyrene Membrane

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 CaCO₃crystals. Crystals with different morphologies (cubic, hexagon and spindle shaped) were found on the active membrane after it induced CaCO₃crystallization. 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.