Highly transparent-hazy multiscale films made of bamboo cellulose micro-and nanomaterials through a one-pot approach

A facile approach was developed for fabricating transparent-hazy multiscale cellulose films. Initially, a mixture of cellulose micro- and nanomaterials (CMNM) was prepared through rapid succinylation of bamboo cellulosic materials at room temperature for 10 min, followed by mechanical disintegration in a food blender for an additional 10 min. This process yielded multiscale transparent films as water evaporated. By manipulating molar ratios of succinic anhydride (SA) to anhydroglucose unit (AGU) during esterification, the multiscale films possessed a haze ranging from 59.2 % to 92.3 %, while retaining high transparency of up to 90.5 %. The dual micro- and nano-network structure endowed the films with excellent flexibility and mechanical performance (tensile strength of 105 MPa and modulus of 6.0 GPa). The developed multiscale films demonstrated to effectively enhance the luminescence uniformity of the light-emitting diode (LED) light while exhibited a notable anti-glare effect, suggesting its potential of these films for various light management applications.