Polymers, Journal Year: 2024, Volume and Issue: 16(22), P. 3199 - 3199

Published: Nov. 18, 2024

Nanocellulose has prompted extensive exploration of its applications in advanced functional materials, especially humidity-responsive materials. However, the sunflower pith (SP), a unique agricultural by-product with high cellulose and pectin content, is always ignored wasted. This work applied sulfuric acid hydrolysis sonication to obtain nanocellulose construct film materials properties. The SP nanoparticle (SP-NP) suspension could form transparent stacked layers laminated structure. Due tightly layered structure expansion confinement effect, when humidity increases, SP-NP responds rapidly just 0.5 s completes full flipping cycle 4 s, demonstrating excellent capability. After removing hemicellulose lignin, nanocrystals (SPC-NC) self-assemble into chiral nematic film, displaying various structural colors based on different times. color SPC-NC dynamically adjusted changes ambient humidity, exhibiting both functionality aesthetics. research provides new perspective high-value utilization while establishing practical foundation for developing novel responsive cellulose-based

Language: Английский