Cellulose Nanocrystals/Polyacrylamide Composites of High Sensitivity and Cycling Performance To Gauge Humidity

• DOI: 10.1021/acsami.7b04590
• Publication Date: 2017-05-10T21:23:22Z
• Authors: Tao Lu; Hui Pan; Jun Ma; Yao Li; Syeda Wishal Bokhari; Xueliang Jiang; Shenmin Zhu; Di Zhang
• Keywords: Polyacrylamide

Cellulose nanocrystals (CNCs) have attracted much interest due to their unique optical property, rich resource, environment friendliness, and templating potentials. CNCs been reported as novel photonic humidity sensors, which are unfortunately limited by the dissolution unideal moisture absorption of CNCs. We, in this study, developed a high-performance composite sensor that consisted polyacrylamide; chemical bonding was induced between two components using glutaraldehyde bridging agent. The composites inherited chiral nematic structure maintained it well through cycling test. A distinct color change observed for these used indicator; caused polyacrylamide swelling with water thus enlarging helical pitch structure. showed no degradation sensing performance cycling. excellent stability attributed This strategy can extend development other indicators.