Super-robust and sustainable bamboo structural material enabled by bonding network reconstruction

Area of Science:

• Materials Science
• Biomaterials Engineering
• Sustainable Engineering

Background:

• Advanced engineering demands lightweight, high-strength, and sustainable structural materials.
• Natural bamboo possesses potential but requires enhanced mechanical properties and homogeneity for broader applications.

Purpose of the Study:

• To develop a novel processing strategy for transforming natural bamboo into a high-performance structural material.
• To achieve uniform high strength in both longitudinal and transversal directions, alongside enhanced durability and sustainability.

Main Methods:

• Bamboo fibers were dispersed using hydrogen peroxide/ozone (H₂O₂/O₃) treatment.
• An ionic-hydrogen bonding network (IHBN) was reconstructed by introducing Al³⁺ and rapid pressing.

Main Results:

• The resulting HoRo-Bamboo material has a low density (0.83 g·cm^-3) and exceptionally high tensile strengths (631 MPa longitudinal, 628 MPa transversal).
• The material demonstrates excellent environmental resistance, flame retardancy, and low carbon emissions (1.67 kg CO₂ eq./kg).

Conclusions:

• The developed bonding network reconstruction technology effectively enhances bamboo's mechanical properties and homogeneity.
• HoRo-Bamboo presents a viable, sustainable, lightweight, and robust alternative to conventional structural materials.