1 / 2021-03-25 11:28:34

Investigation of cell wall structure in bamboo fiber and parenchyma cell for improving cellulose nanofibrillation efficiency

cellulose,fibrillation,Plant cell wall

     Converting lignocellulosic biomass to nanocellulose requires huge energy input due to biomass recalcitrance. A fundamental and detailed investigation on the chemical composition, morphological and structural organization of cell wall in native fiber and parenchyma cells, two distinct cell wall types in bamboo, were conducted. One important result is that both hemicellulose and lignin were found oriented highly parallel to cellulose in fiber cell wall, which was not the case for parenchyma cells, indicating more tightly associated between cell polymers from fiber than that of parenchyma cells. The presence of loosely bound hemicellulose to cellulose in parenchyma cells seemed to promote chemical pretreatment efficiency as it caused  drastic increase in nanoscale pores and surface area, leading to a easier fibrillation through ultrasonic treatment, compared to fiber. These results can provide information for further investigations on the understanding of effect and mechanism concerning the pretreatment and subsequent nanofibrillation process.