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Water-durable, and recyclable dynamic cross-linked cellulose-based triboelectric nanogenerators for energy harvesting

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Abstract

Cellulose-based composites typically have poor water resistance because they are cross-linked through non-covalent bonds, such as hydrogen bonds. Herein, furan group was grafted onto sisal microcrystalline cellulose fiber (F-MSF) and a dynamic thermally reversible cross-linked network structure was formed with maleimide modified CaCu3Ti4O12 (D-CCTO) to obtain recyclable D-CCTO/F-MSF composites (DFF) through the Diels-Alder reaction. The results showed that the mechanical properties of DFF composites were improved due to the improvement of the cross-linked structure between D-CCTO and F-MSF. At 1 wt% D-CCTO content, the tensile strength of DFF was 5.53 MPa, which increased by 346% compared with that of pure MSF. At 5 wt% D-CCTO content, the short-circuit current, open circuit voltage, transferred charge of DFF-based triboelectric nanogenerators (DF-TENG) were 3.2 µA, 85 V and 26 nC, respectively. Additionally, the DF-TENG was able to maintain its electrical performance of more than 60% at an ambient humidity of 90% and was able to light up more than 30 LED bulbs. This research provides new insights into addressing the challenge of poor water resistance in conventional cellulose-based composites, while also designing a recyclable TENG device that can harvest energy in high humidity environments.

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Acknowledgments

The authors gratefully acknowledge the financial support of the Natural Science Foundation of Guangxi Province (2022GXNSFAA035536), the Innovation Project of Guangxi Graduate Education (YCBZ2022120), and the Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education (22KF-7).

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Hong Ruan: Conceptualization, Writing-review & editing, Investigation. Xin Chen: Methodology, Investigation, Writing-original draft. Chunzi Lv: Writing-review & editing, Visualization. Xingshuai Gu: Writing-review & editing, Visualization. Zhijian Zhou: Writing-review & editing. Shaorong Lu: Supervision, Writing-review & editing. Yuqi Li: Supervision, Writing-review & editing, Project administration.

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Correspondence to Yuqi Li.

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Ruan, H., Chen, X., Lv, C. et al. Water-durable, and recyclable dynamic cross-linked cellulose-based triboelectric nanogenerators for energy harvesting. Cellulose 30, 11425–11437 (2023). https://doi.org/10.1007/s10570-023-05568-z

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