Bioinspired Functionally Graded Composite Assembled Using Cellulose Nanocrystals and Genetically Engineered Proteins...

Area of Science:

• Biomaterials Science
• Materials Engineering
• Biomineralization

Background:

• Nature offers advanced strategies for creating robust materials with superior mechanical properties, often difficult to synthesize artificially.
• The stomatopod's dactyl club is a prime example of a naturally evolved, impact-resistant biological composite.

Purpose of the Study:

• To rationally design and produce a mineralized biocomposite inspired by the stomatopod dactyl club.
• To create complex-shaped dental implant crowns with enhanced mechanical properties.
• To develop a novel platform for synthesizing multifunctional biocomposites using self-assembly principles.

Main Methods:

• Design of a biocomposite using cellulose nanocrystals (CNCs) and genetically engineered proteins.
• Incorporation of in situ growth of reinforcing apatite crystals.
• Utilizing controlled self-assembly across multiple length scales and protein phase separation for structural property emergence.

Main Results:

• Successful fabrication of a mineralized biocomposite in the shape of dental implant crowns.
• Achieved high strength, stiffness, and fracture toughness in the engineered material.
• Demonstrated that structural properties arise from controlled, multi-scale self-assembly and protein engineering.

Conclusions:

• Replication of multiscale biomanufacturing principles found in nature.
• Establishment of an innovative platform for synthesizing tunable, multifunctional biocomposites.
• Highlighting the potential of colloidal self-assembly and protein engineering for advanced material development.