Stimuli-responsive hydrogels derived from agricultural residues: an overviewNaglaa Salem El‑Sayed, Tamer Y. A. Fahmy, and Samir Kamel Cellulose and Paper Department, National Research Centre, Cairo, Egypt
E-mail: samirki@yahoo.com Received: 19 May 2024 Accepted: 27 February 2025 Abstract: Several review articles surveyed stimuli-responsive hydrogels derived from both synthetic and natural polymers, including cellulose. The literature, on the other hand, doesn’t have a dedicated review of stimuli-responsive hydrogels made from agricultural waste. Agricultural residues are renewable, sustainable, and feasible raw materials for stimuli-responsive hydrogel production. Moreover, adopting agricultural residues for a such purpose provides additional value to agricultural residues instead of the useless burning of agricultural residues, which dissipates the residues and harms the environment (e.g. burning rice straw). These factors encouraged the authors to present the current review. In this review, we focus on the recent advances in the preparation and application of stimuli-responsive hydrogels derived from agricultural residues, especially cellulose-based hydrogels. We first introduce the general methods for extracting cellulose from agricultural residues and synthesizing stimuli-responsive hydrogels. Then, we discuss the different types of stimuli-responsive hydrogels according to their responsive mechanisms and behaviors. We also highlight the potential applications of these hydrogels. Finally, we conclude with the current challenges and future perspectives in this emerging field. Keywords: Crop waste; Gels and Hydrogels; Plant Materials; Polyhydroxyalkanoates; Soft Materials; Supramolecular Polymers; Stimuli-responsive hydrogels; Agricultural residues valorization; Cellulose extraction and modification Full paper is available at www.springerlink.com. DOI: 10.1007/s11696-025-03994-w
Chemical Papers 79 (6) 3475–3491 (2025) |
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