Cellulose Material with Humidity Color Responsiveness

Abstract

Abstract In nature, there are a large number of structural color applications. To biobionic nature’s structural color and response to environmental stimuli color changes, jute is prepared by acid hydrolysis into cellulose nanocrystals, and then by simply introducing small molecules as plasticizers and moisture absorbers to prepare a highly flexible, Controlled rainbow colors and multi-stimulating cellulose nanocrystals (CNC). The presence of the additive polyglycol (PEG) doesn’t prevent the self-assembly of CNC in the aqueous solution, but will result in increased mechanical toughness, which makes it possible to obtain a structurally adjustable independent Rainbow CNC color. The surface charge density of CNC is an important factor in controlling the spacing dimension of the chiral nematic structure of the dry solid CNC film, which can smoothly change the color of the structure by adjusting the chiral nematic structure. It is worth noting that the change is reversible, with alternating relative humidity between 40% and 100%, a discoloration material that makes biofilms widely used in color-coded sensors, anti-fouling techniques and decorative coatings.