Fabrication Of 3D-Oriented Biomimetic Calcium Carbonate Thin Films

Biominerals such as seashell nacre,sea cucumber teeth,and human bones all have complex hierarchical structures and excellent properties.The synthesis of composites with excellent performance by means of biomimetic mineralization has become one of the important trends in the development of material science in the future.Calcium carbonate,as the world's most abundant biomineral,has attracted the attention of many scientists.In biominerals,calcium carbonate often forms inorganic/organic composites with biomolecules such as chi tin,glycoproteins,and silk fibroin proteins to change their morphology and enhance their performance.Therefore,designing different polymer substrates and preceeding mineralization under the action of suitable polymer additives has become an important route for obtaining calcium carbonate crystal materials having special structures and functions.This bottom-up strategy can be widely used to synthesize thin film materials with advanced functions.In this paper,we will obtain a uniaxial thin film template by controlling the morphological structure of the polymer substrate,and supplement it by suitably soluble polymer additives to obtaining carbonates with a special 3D orientation through biomimetic mineralization methods.We will investigate the structure and morphological information of 3D oriented calcium carbonate thin films by polarization optical microscopy,scanning electron microscopy and other means,and explore the mechanism of biomimetic mineralization through kinetic studies.Finally,we have tested the anisotropic properties of 3D ordered calcium carbonate thin films by a variety of testing methods to find a variety of potential applications for these materials.This topic will for the first time emphasize the important role of the in-plane orientation of template on the 3D orientation of biomimetic mineralized thin films,and provide new ideas for the synthesis and application of calcium carbonate thin films.