Plant material features responsible for bamboo's excellent mechanical performance: a comparison of tensile properties of bamboo and spruce at the tissue, fibre and cell wall levels

摘要: Background and aims Bamboo is well known for its fast growth excellent mechanical performance, but the underlying relationships between structure properties are only partially known. Since it lacks secondary thickening, bamboo cannot use adaptive in same way as a tree would order to modify geometry of stem increase moment inertia cope with bending stresses caused by wind loads. Consequently, adaptation can be achieved at tissue level, this study examine how comparison softwood species tissue, fibre cell wall levels. Methods The single fibres slices stems mature moso (Phyllostachys pubescens) spruce (Picea abies) latewood were investigated microtensile tests. Cell parameters, cellulose microfibril angles chemical composition determined using light electron microscopy, wide-angle X-ray scattering confocal Raman microscopy. Key results Pronounced differences tensile stiffness strength found levels, not level. Thus, under loads, differing structures (multilayered) (sandwich-like) appear minor relevance. Conclusions superior bundles mainly result amplified formation, leading densely packed rather than being based on specific properties. material optimization towards extremely compact multi-lamellar might plant strategy that compensates lack thickening which favourable biomechanics also increasingly utilized terms engineering products made from culms.