The Influence of Saturated Steam on Moso Bamboo Quasi-static Micromechanical Properties: Nano-Scale Evaluation

Abstract

In this paper, in order to analyze the quasi-static properties of Moso bamboo, a new, environmentally friendly and eco-friendly method was used for bamboo thermal modification under the effect of saturated steam. Under saturated steam heat treatment, the chemical composition in bamboo decreased, and the bamboo cell wall shrunk slightly. The increased crystallinity index of cellulose and decreased intensity of peaks belong to hemicellulose were confirmed by XRD and Fourier transform infrared (FTIR) spectroscopy. In addition, the highest modulus of elastic and hardness of treated bamboo were 22.5GPa and 1.1GPa at 180℃/10 min. These conclusions confirmed the micro-mechanical properties of the bamboo cell wall were enhanced by saturated steam heat treatment. The E'r of differently treated bamboo increased with increasing temperature and time, while the E''r and tan δ negatively as a function of increasing frequency. Furthermore, this thermal modification can be regarded as a useful, environmental-friendly and eco-friendly treatment to outdoor use of bamboo-based materials.

Flattening of Bamboo Culm while Softening in Palm Oil and Subsequent Mechanical Characterization

“…The increased compression resistance appears to be due to the changes in the properties of the matrix that become more brittle with temperature treatment as elucidated by one study [15]. There is also the process of lignification of bamboo fiber as reported in [16] which forms an amorphous network which can enclose the holocellulose and can increase the micromechanical properties of the bamboo. Lastly, one investigation [17] has shown that there are three kinds of fracture behaviors within the bamboo microstructure during the deformation and fracture process which are matrix (parenchyma cells) failure, fiber dissociation and fiber breakage.…”