Nanocellulose is an abundant,eco-friendly,and renewable resource,as a cellulose-derived material,it is characterized by high mechanical strength,high crystallinity,and large specific surface area due to its special structural properties.Nanocellulose-based humidity-responsive smart devices show excellent sensitivity and fast response due to its abundant hydrophilic groups(such as hydroxyl and carboxyl groups).Nanocellulose can be used as a humidity sensitive material to prepare high-performance humidity-responsive smart devices.This paper provides a concise overview of nanocellulose,its classification,and sources,along with an exploration of the classification and response principle of humidity responsive smart devices.The primary focuses lie in the applica-tion of nanocellulose within the context of humidity-responsive smart devices,and summarized the performance,advantages and disadvantages of different types of humidity responsive smart devices composited with nanocellu-lose and conductive materials.Finally,this paper conclude the problems and challenges in the potential research applications of nanocellulose-based humidity-responsive smart devices,aiming to offer theoretical support for the advancement of nanocellulose-based composites in humidity-responsive smart devices.
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