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Graphene Oxide-Modulated CMC/PVA Films with on-Demand Shape Recovery and Self-Healing Performance
Changdong Ju1, Huabo Huang1, Xianghua Yu1
1Key Laboratory for Green Chemical Process of Ministry of Education, Engineering Research Center of Environmental Materials and Membrane Technology of Hubei Province, Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education, Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China.
Abstract:
With the advancement of artificial intelligence technologies, shape-memory polymers (SMPs) have attracted significant research interest due to their remarkable environmental responsiveness. However, conventional SMPs are limited to single-stimulus responsiveness and constrained performance, failing to meet practical application demands. This study develops a novel shape-memory carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA) composite film modulated by graphene oxide (GO) with multi-stimuli responsive capabilities and water-assisted self-healing properties. The introduction of GO significantly enhances the mechanical properties, and provides efficient swelling-resistant ability and thermal conversion efficiency of the composite film, endowing it with on-demand shape-memory performance under thermal and water stimulation. It can achieve a shape fixation rate of 94.45% and a recovery rate of 97.22%. Meanwhile, the shape-memory behaviors can be precisely tailored by modulating the content of GO and PVA as well as interfacial interactions. Furthermore, the composite films achieve efficient water-triggered self-healing with a remarkable 90.6% recovery efficiency, which is attributed to their inherent hydrophilic nature and dynamic physical crosslinking architecture. This research demonstrates a novel strategy for creating stimuli-adaptive and shape-memory materials, providing a pivotal platform for their application in flexible actuation devices and intelligent medical systems.
