Layered Biomimetic Composites from MXenes with Sequential Bridging.

Area of Science:

• Materials Science
• Nanotechnology
• Composite Materials

Background:

• Layer-by-layer (LbL) assembly is a common method for creating layered nanocomposites using various nanomaterials.
• Alternative methods like vacuum-assisted filtration and blade coating are simpler but introduce voids, compromising performance.
• Voids in layered nanocomposites, particularly Ti3C2Tx MXene composites, significantly hinder their overall performance.

Purpose of the Study:

• To address the issue of voids in layered nanocomposites.
• To develop a novel self-assembly strategy for creating continuous, high-performance 2D platelet-based nanocomposites.
• To investigate void elimination in Ti3C2Tx MXene composites.

Main Methods:

• Sequential nanoscale bonding of Ti3C2Tx MXene platelets with sodium carboxymethyl cellulose.
• Covalent bridging using borate ions to link the bonded platelets.
• Evaluation of the void structure within the resulting MXene composites.

Main Results:

• Successfully eliminated voids in Ti3C2Tx MXene composites.
• Demonstrated a new pathway for self-assembling 2D platelets into continuous layered nanocomposites.
• Achieved high-performance nanocomposites by resolving the fundamental problem of voids.

Conclusions:

• Sequential nanoscale bonding and covalent bridging effectively create void-free, continuous layered nanocomposites.
• This approach offers a new strategy for fabricating high-performance 2D platelet-based materials.
• The findings pave the way for advanced applications requiring robust and void-free nanocomposite structures.