Comparison of colors, microstructure, chemical composition and thermal properties of bamboo fibers and parenchyma cells with heat treatment

Abstract The effects of heat treatment at various temperatures on mechanically separated bamboo fibers and parenchyma cells were examined in terms color, microstructure, chemical composition, crystallinity, thermal properties. heat-treated characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), composition analysis, thermogravimetric analysis (TGA). results revealed that the colors darkened as temperature increased. microstructure treated slightly changed, yet shape starch granules markedly altered a above 160 °C. compositions varied depending temperature. When 220 °C, cellulose content was almost unchanged but increased 15% cells; hemicellulose decreased lignin regardless cells. crystal structure nearly unaffected treatment, crystallinity changed more pronouncedly than stability after affected substantially compared to fibers.