Raw bamboo culms were cut into individual stems of different lengths (without nodes) and boiled in water for 1 h to remove water-soluble organic matter and trapped air. Following, a delignifying solution (50 wt% glacial acetic acid and 50 wt% 30% H2O2) was applied by soaked soaking at 80 °C until the sample became light in color. The sample was then rinsed with 0.5 wt% sodium hydroxide aqueous solution for 5-10 min and washed in deionized water to remove any residual chemicals. Finally, the samples were placed in absolute ethanol for further washing and the obtained B-fibers was were dried at 60 ℃ for 24 h.