Artificial development of smart materials from agricultural waste or food residues is particularly desirable for green chemistry. In this paper, dual-network self-healing hydrogels were successfully fabricated by using functional microcapsules. These microcapsules were established by biomass porous carbon (PC) after recycling of apple residues. Glutaraldehyde (GA) as the healing agent was embedded in the porous carbon, and the outer surface was coated with polydopamine (PDA). After the microcapsules were added, modifying guar gum-type hydrogels were successfully obtained with dual self-healing performance by the combination of a healing agent and metal−ligand coordination. The self-healing efficiency was about 89.9% from the tension test, and the fracture strength was measured as 7.68 MPa. These results not only highlight a new idea for the utilization of apple residues but also provide a new method for the preparation of excellent self-healing hydrogels.
In the progress of red‐winemaking, eco‐friendly, facile, and efficient reutilization of grape pomace is an important issue for sustainable industrial processes. In this manuscript, cellulose nanocrystals (CNCs) as extensive and expensive nanomaterials, are efficiently extracted from grape pomace by using deep eutectic solvents. Moreover, the obtained CNCs as the renewable reinforcing agent are successfully fabricated of self‐healing nanocomposite hydrogels. The self‐healing (93.5%) and mechanical strength (4.77 MPa) in hydrogels are outstandingly improved by the addition of functional CNCs, in which abundant carboxyl functional groups are modified by in situ esterification in the process of extracting CNCs. Importantly, these strain‐sensitive and self‐healing nanocomposite hydrogels can be further used as flexible strain sensors to detect human motion.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.