This study attempted to prepare a single cellulose nanofiber, "nanocellulose", dispersed in water from 3D networks of nanofibers in microbial cellulose pellicle using aqueous counter collision (ACC), which allows biobased materials to be down-sized into nano-objects only using water jets without chemical modification. The nanocellulose thus prepared exhibited unique morphological properties. In particular, the width of the nanocellulose, which could be controlled as desired on nanoscales, was smaller than that of just secreted cellulose nanofiber, resulting in larger specific surface areas. Moreover, ACC treatment transformed cellulose Iα crystalline phase into cellulose Iβ phase with the crystallinity kept >70%. In this way, ACC method depending on the treatment condition could provide the desired fiber width at the nanoscale and the different ratios of the two crystalline allomorphs between cellulose Iα versus I β, which thus opens further pathways into versatile applications as biodegradable single nanofibers.
All Science Journal Classification (ASJC) codes
- Polymers and Plastics
- Materials Chemistry