| 韩佳志,王丽娜,陈铭杰,郭延柱.单宁酸改性木质素纳米颗粒Pickering乳液在农业除草剂减量增效的应用[J].中国造纸学报,2025,40(3):188-196 |
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| 单宁酸改性木质素纳米颗粒Pickering乳液在农业除草剂减量增效的应用 |
| Tannic Acid Modified Lignin Nanoparticles Stabilized Pickering Emulsions for Enhancing the Foliar Deposition and Agrochemical Utilization |
| 投稿时间：2024-08-29 修订日期：2024-09-18 |
| DOI：10.11981/j.issn.1000-6842.2025.03.188 |
| 中文关键词: 木质素纳米颗粒 Pickering乳液 异丙甲草胺 沉积性能 |
| Key Words:lignin nanoparticle Pickering emulsion metolachlor deposition performance |
| 基金项目:大连市杰出青年科技人才支持计划项目（2023RJ002）；辽宁省教育厅基本科研项目（JYTZD2023025）；国家自然科学基金（22078036，22478048）；广西清洁制浆造纸与污染控制重点实验室基金项目（2023GXZZKF09）；广东省科技厅科技发展计划项目（2021QN02C793）；广东省科学院科技发展计划项目（2022GDASZH-2022010101）。 |
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| 中文摘要: |
| 增加农药液滴在叶片上的沉积量和附着率是提高农药利用效率和应对农药应用挑战的重要手段。本研究以硫酸盐木质素为原料，利用单宁酸对木质素结构进行修饰，通过反溶剂法得到单宁酸改性木质素纳米颗粒（TA-LNPs），并将其用于稳定负载异丙甲草胺的Pickering乳液，构建了一种简便、高效的农用化学品递送系统；探究了木质素基Pickering乳液（TA-PEs）在叶面上的沉积性能、缓释行为和紫外光降解行为。结果表明，TA-PEs与叶面的接触角为37.92°，展现出较好的叶面润湿能力；TA-PEs在叶面沉积量可达81.53%；同时，TA-PEs还表现出对异丙甲草胺的紫外防护效果，在紫外线照射24 h后，异丙甲草胺的保留率为77.46%，TA-PEs的叶片润湿性、叶片沉积性能和紫外光稳定性均优于市售十二烷基苯磺酸钠稳定的异丙甲草胺乳液。 |
| Abstract: |
| Increasing the deposition and adhesion rate of pesticide droplets on leaves is an important means to improve the utilization efficiency of pesticides and meet the challenges of pesticide application. In this study， sulfate lignin was used as raw material to modify the structure of lignin by tannic acid. Tannic acid modified lignin nanoparticles （TA-LNPs） were obtained by anti-solvent method and used to stabilize the Pickering emulsion loaded with metolachlor. A simple and efficient agricultural chemical delivery system was constructed. The deposition performance of lignin-based Pickering emulsions （TA-PEs） on the leaf surface and the sustained release behavior and UV degradation behavior of metolachlor in the emulsion were investigated. The contact angle between TA-PEs and the leaf surface was 37.92°， showing good leaf wetting ability. After coating with TA-PEs， the deposition of metolachlor on the leaf surface could reach 81.53%. At the same time， TA-PEs also showed UV protection effect on metolachlor. After 24 h of UV irradiation， the retention rate of metolachlor was 77.46%. The leaf wettability of TA-PEs， the leaf deposition performance and the UV light stability of herbicides were better than those of commercial sodium dodecyl benzene sulfonate stabilized metolachlor emulsion. |
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