Self-assembly of organic-inorganic nanocomposites with nacre-like hierarchical structures

Mimicking the hierarchical micro/nanosized architecture of biological materials to produce advanced materials with superior properties is a challenging issue. By using self-consistent field theory, we here propose a novel approach to produce nacre-like nanocomposites through the self-assembly of block copolymers and polymer-grafted nanoparticles confined by parallel platelets. It is found that the components can assemble into hierarchical structures with nanosized mineral bridges that connect neighboring platelets, just like those in natural nacre. The nanobridges can functionally protect the organic macromolecular polymer by significantly reducing its stress level. More interestingly, the grafted nanoparticles can respond to mechanical damage and migrate towards and assemble at the faces of existing microcracks, which imparts a self-healing function to the material. The approach described is applicable for the synthesis of a wide range of advanced biomimetic composites.