Impact-resistant nacre-like transparent materials.

Area of Science:

• Materials Science
• Biomimetics
• Structural Engineering

Background:

• Traditional glass exhibits excellent optical properties but suffers from brittleness and low impact resistance, limiting its use.
• Existing methods like lamination and tempering improve impact response but fail to address inherent brittleness.
• Natural nacre (mother-of-pearl) offers exceptional toughness through its unique 3D "brick-and-mortar" structure and "tablet sliding mechanism".

Purpose of the Study:

• To engineer a novel bioinspired laminated glass that replicates the structural features of natural nacre.
• To enhance the toughness and impact resistance of glass by incorporating a "tablet sliding mechanism".
• To create a high-performance glass material suitable for demanding applications.

Main Methods:

• Designed a 3D "brick-and-mortar" architecture using transparent thermoplastic elastomer interlayers.
• Mimicked the hierarchical structure and "tablet sliding mechanism" of natural nacre.
• Fabricated and tested the nacre-like glass for strength, stiffness, and impact resistance.

Main Results:

• The bioinspired glass successfully reproduced the "tablet sliding mechanism", enabling large-volume nonlinear deformations.
• Achieved a 2-3 times greater impact resistance compared to conventional laminated and tempered glass.
• Maintained high levels of strength and stiffness comparable to traditional glass.

Conclusions:

• The nacre-inspired glass demonstrates a highly effective biomimetic approach to overcoming glass brittleness.
• The "tablet sliding mechanism" is a critical factor in achieving superior toughness and impact resistance.
• This new material offers a promising pathway for developing significantly stronger and safer glass products.