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Lignin-based non-crosslinked nanocarriers: A promising delivery system of pesticide for development of sustainable agriculture

International Journal of Biological Macromolecules 2022 45 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Zhengang Xie, Zhengang Xie, Wenlong Liang, Frederik R. Wurm Jiadong Zhang, Frederik R. Wurm Frederik R. Wurm Zhengang Xie, Zhengang Xie, Frederik R. Wurm Frederik R. Wurm Frederik R. Wurm Jingli Cheng, Frederik R. Wurm Rong Wang, Frederik R. Wurm Frederik R. Wurm Frederik R. Wurm Frederik R. Wurm Frederik R. Wurm Jingli Cheng, Zhengang Xie, Zhengang Xie, Frederik R. Wurm Frederik R. Wurm Jingli Cheng, Xianbin Li, Jinhao Zhao, Jinhao Zhao, Frederik R. Wurm Jinhao Zhao, Frederik R. Wurm

Summary

Researchers modified lignin sulfonate — a paper-industry byproduct — into nanoparticles that encapsulate the fungicide difenoconazole, demonstrating sustained release over 1,248 hours compared to 96 hours for conventional formulations, along with improved UV stability, foliar retention, and efficacy against strawberry anthracnose.

Lignin sulfonate (LS), a waste material from the paper pulping, was modified with benzoic anhydride to obtain benzoylated lignin sulfonates of adjustable hydrophilicity (BLS). When BLS was combined with difenoconazole (Di), a broad-spectrum fungicide, lignin-based, non-crosslinked nanoparticles were obtained either by solvent exchange or solvent evaporation. When a mass ratio of 1:5 LS: benzoic anhydride was used, the Di release from Di@BLS after 1248 h was ca. 74 %, while a commercial difenoconazole microemulsion (Di ME) reached 100 % already after 96 h, proving the sustained release from the lignin nanocarriers. The formulation of Di in lignin-based nanocarriers also improved the UV stability and the foliar retention of Di compared to the commercial formulation of the fungicide. Bioactivity assay showed that Di@BLS exhibited high activities and duration against strawberry anthracnose (Colletotrichum gloeosporioides). Overall, the construction of fungicide delivery nano-platform using BLS via a simple non-crosslinked approach is a novel and promising way to develop new formulations for nanopesticide and the development of sustainable agriculture.

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