Crystallization of CaCO_3 Mediated by Welldefined Amphiphilic Diblock Polypeptide

摘要

The design and synthesis of macromolecules which could assemble in a few of certain conditions are curial in biomimetic mineralization, as the organic matrice (soluble and insoluble) associated with natural biomineralization are mainly proteins or peptides with specific pre-organized structures. During the costumed mineralization, Langmuir-Blodgett films or self-assembly monolayer is usually used as insoluble organic matrice while double-hydrophilic block copolymer ( DHBC) is applied as soluble acidic proteins. However, the amphiphilic polymer may be a better candidate for regulating the crystallization of inorganic materials because of its self-assembly, both in bulk solution and at the interface. Here, besides the controllable synthesis of the simple amphiphilic polypeptide, i . e . poly (glutamic acid)_nbpoly( alanine)_m, we also report the calcite/peptide hybrid with various shapes (such as hemisphere and polyhedron, etc.) obtained at the air/water interface through the biomimetic mineralization process while such polypeptide works as additive.