| 张纪彤,王丽娜,马兰,郭延柱.木质素纳米颗粒稳定的Pickering乳液及其在异丙甲草胺除草中的应用[J].中国造纸,2025,44(11):8-16 |
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| 木质素纳米颗粒稳定的Pickering乳液及其在异丙甲草胺除草中的应用 |
| Preparation of Pickering Emulsion Stabilized by Lignin Nanoparticles and Their Application in Metolachlor Herbicidal |
| 收稿日期:2025-05-20 修订日期:2025-06-06 |
| DOI:10.11980/j.issn.0254-508X.2025.11.002 |
| 关键词: 木质素 纳米颗粒 Pickering乳液 农药缓释 |
| Key Words:lignin nanoparticles Pickering emulsion pesticide release |
| 基金项目:国家自然科学基金项目(22478048);大连市杰出青年科技人才项目(2023RJ002);辽宁省教育厅基本科学研究项目(JYTZD2023025)。 |
| 作者 | 单位 | 邮编 | | 张纪彤* | 大连工业大学轻工与化学工程学院,辽宁省制浆造纸工程重点实验室,中国轻工业联合会植物资源高值化利用重点实验室,大连市植物资源高值化应用与开发重点实验室,辽宁大连,116034 | 116034 | | 王丽娜 | 大连工业大学轻工与化学工程学院,辽宁省制浆造纸工程重点实验室,中国轻工业联合会植物资源高值化利用重点实验室,大连市植物资源高值化应用与开发重点实验室,辽宁大连,116034 | 116034 | | 马兰 | 大连工业大学轻工与化学工程学院,辽宁省制浆造纸工程重点实验室,中国轻工业联合会植物资源高值化利用重点实验室,大连市植物资源高值化应用与开发重点实验室,辽宁大连,116034 | 116034 | | 郭延柱* | 大连工业大学轻工与化学工程学院,辽宁省制浆造纸工程重点实验室,中国轻工业联合会植物资源高值化利用重点实验室,大连市植物资源高值化应用与开发重点实验室,辽宁大连,116034 | 116034 |
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| 摘要:以来源于硫酸盐木质素的木质素纳米颗粒(LNPs)为原料,通过反溶剂法与十二烷基苯磺酸钠(SDBS)复合,制得粒径为(47.04±16.55) nm的木质素/SDBS复合纳米颗粒(S-LNPs)。以S-LNPs为稳定剂,进一步制备包载有异丙甲草胺的Pickering乳液(S-PEs),探究了合成过程中SDBS添加量、油水比、异丙甲草胺添加量对S-PEs液滴形貌及粒径尺寸的影响。结果表明,在SDBS添加量2.5%(相对于S-LNPs悬浮液的质量分数)、油水比3∶7、异丙甲草胺添加量1.0%(相对于油相质量分数)条件下制得的S-PEs较为稳定,平均粒径约10.54 μm;经其包载的异丙甲草胺具有一定缓释性能和抗光降解性能。S-PEs在叶片表面的接触角为56.35°、叶面残留量为58.13 g/cm2,相较由SDBS稳定的传统载药乳液表现出更为优异的除草效果。 |
| Abstract:Lignin/SDBS composite nanoparticles (S-LNPs) with a particle size of (47.04±16.55) nm were obtained by complexing lignin nanoparticles (LNPs) derived from sulfate lignin and sodium dodecylbenzene sulfonate (SDBS) via the antisolvent method. The Pickering emulsions (S-PEs) loaded with metolachlor were prepared using S-LNPs as stabilizer. The effects of the dosage of SDBS, the oil-water ratio and the dosage of metolachlor on the morphology and size of the S-PEs droplet were investigated. The results showed that when the SDBS addition amount was 2.5% (mass fraction relative to the S-LNPs suspension), the oil-water ratio was 3∶7, and the amount of metolachlor was 1.0% (mass fraction relative to the oil phase), a relatively stable S-PEs with an average particle size of about 10.54 μm was obtained. The metolachlor contained in it had certain sustained-release and light degradation-resistance properties. The contact angle of S-PEs on the leaf surface was 56.35°, and the leaf surface residue quantity was 58.13 g/cm2. Compared with the traditional drug-carrying emulsion stabled by SDBS, S-PEs exhibited more superior herbicidal effect. |
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