数字农科院2.0

Scalable engineering of sCNC microcapsules for synergistic weed control and environmental safeguarding

文献类型： 外文期刊

作者： Xile Deng;Liang Li;Simin Yu;Yanan Deng;Zhanghua Zeng;Lianyang Bai

作者机构：

关键词： Control release;Cross-linking;Herbicide;sCNC;Security;Stimulation

期刊名称： Chemical Engineering Journal

ISSN： 1385-8947

年卷期： 2025 年 525 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Weed infestation causes over 10 % of global crop losses, with rice paddies particularly vulnerable to invasive species such as barnyard grass (Echinochloa crus-galli). Pretilachlor (Pre)-based pre-emergence soil application serves as a cornerstone for weed control in farmland. However, conventional Pre emulsifiable concentrates (Pre EC) exhibit low targeting efficiency, leading to non-target toxicity and environmental persistence. In this study, we developed scalable and solvent-free Pickering emulsion-templated microcapsules (Pre@CL-sCNC) using sulfonated cellulose nanocrystals (sCNC) for the controlled release of Pre. Isothermal titration calorimetry and molecular dynamics simulations revealed hydrogen bonding-driven sCNC assembly, achieving a Pre loading capacity of 74.8 wt%. At an application rate of 400 g a.i./ha, Pre@CL-sCNC achieved 91.7 % fresh weight and 92.3 % visual control efficacies, significantly outperforming Pre EC (73.9 % and 73.3 %, respectively). Quantitative reverse transcription polymerase chain reaction (qRT-PCR) analysis demonstrated that Pre@CL-sCNC more effectively suppressed barnyard grass cell cycle-related genes than Pre EC, inducing a 56.8 % downregulation of Histone H4 and a 25.8 % reduction in CYCA expression. Furthermore, the Pre@CL-sCNC treatment significantly reduced oxidative stress and caused less phytotoxicity to rice crops. The half-maximal inhibitory concentration (IC50) value for human skin fibroblast cells increased from 0.0012 mg/mL (Pre EC) to 0.0058 mg/mL (Pre@CL-sCNC), and honeybee contact toxicity was also reduced. Notably, Pre@CL-sCNC residue levels in soil remained lower than those of Pre EC during the initial week post-application. This environmentally adaptive platform integrates scalable fabrication with multi-tier environmental compatibility, advancing precision agrochemical delivery.

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