Water-Induced shape memory effect of nanocellulose papers from sisal cellulose nanofibers with graphene oxide

• Published in: Carbohydrate polymers Vol. 179; pp. 110 - 117
• Main Authors: Song, Laifu, Li, Yuqi, Xiong, Zhongqiang, Pan, Lulu, luo, Qiyun, Xu, Xu, Lu, Shaorong
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.01.2018
• Subjects: Graphene oxide; Shape memory properties; Sisal cellulose; Water-induced mechanism; Shape memory properties; Graphene oxide; Water-induced mechanism; Sisal cellulose
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2017.09.078

•A water-induced shape memory cellulose based nanocomposites was prepared.•The shape memory properties of MSF-g-COOH were significantly improved.•Tensile strength and Young modulus of the nanocomposite significantly increased.•A water-induced model was proposed. A novel water-induced shape memory nanocomposites were prepared by introducing graphene oxide (GO), which was based on microcrystalline cellulose nanofibers (MSF-g-COOH) extracting from sisal fibers. The results showed that the water-induced shape memory properties of MSF-g-COOH were significantly improved by the strong hydrogen bonding interaction between MSF-g-COOH and GO, It leads to some additional physically cross-linked points in MSF-g-COOH. On the other hand, at 0.5wt% GO loading, tensile strength and Young modulus of the nanocomposite increased from 139 to 184MPa, and from 5.77 to 8.54GPa, respectively, compared to those of pure MSF-g-COOH. Furthermore, a water-induced model was proposed to discuss the water-induced shape memory behaviors of the MSF-g-COOH/GO nanocomposites. This study provides a framework for developing a cellulose based shape memory polymers (CSMPs) and better understanding the shape recovery mechanism in water-induced CSMPs.