Bamboo nanofiber preparation by HCW and grinding treatment and its application for nanocomposite

A new approach to prepare cellulose nanofiber was attempted using the combined method of hot-compressed water (HCW) treatment and disk milling. The HCW treatment was effective in loosening the cell wall structure and enhancing fibrillation by disk milling. The fibrillated products showed fine fibrous morphology at the nanometer scale. Filtration time and specific surface area were measured as criteria of the degree of fibrillation, and both these values were increased in nanofibers obtained by disk milling after HCW treatment. The obtained nanofiber-reinforced polyurethane composite was prepared, and its tensile properties were drastically improved by the increased nanofiber content.