Bamboo as a Functional Gradient Biomaterial

Bamboo as a functional gradient biomaterial refers to the understanding of bamboo culms as naturally hierarchical, anisotropic, and radially heterogeneous lignocellulosic structures whose mechanical, chemical, and conversion properties vary across the wall thickness. Gradients in fiber volume fraction, vascular bundle distribution, moisture, density, mineral content, and silica deposition influence stiffness, strength, durability, permeability, surface hardness, and thermal conversion behavior. This entry treats bamboo not only as a renewable plant resource, but also as a biologically organized material platform for structural components, engineered composites, and carbon-rich products such as biochar and activated carbon. A gradient-based view helps connect bamboo characterization with layer-aware processing, feedstock classification, and circular bio-based material design.