中空介孔二氧化硅纳米粒子负载的鱼藤酮纳米颗粒在黄瓜植株中的吸收和传导特性

郭亚军; 沈殿晶; 赵明; 范添乐; 王智超; 陈小军

doi:10.7671/j.issn.1001-411X.202104002

中空介孔二氧化硅纳米粒子负载的鱼藤酮纳米颗粒在黄瓜植株中的吸收和传导特性

Uptake and translocation properties of rotenone nanopesticide mediated by hollow mesoporous silica nanoparticles in cucumber plant

摘要

摘要:
目的以纳米载体作为农药载体，提高农药利用率。

方法采用自模板合成法，在合成实心介孔二氧化硅纳米粒子(Mesoporous silica nanoparticles, MSNs)的基础上，以水为刻蚀剂制备中空介孔二氧化硅纳米粒子(Hollow mesoporous silica nanoparticles, HMSNs)。通过溶剂挥发法将植物源农药鱼藤酮(Rot)负载到HMSNs的孔道中，制备得到Rot@HMSNs。测定Rot@HMSNs的缓释性能和杀虫活性。HPLC检测Rot@HMSNs中鱼藤酮在黄瓜植株中的系统分布。

结果所制备的HMSNs粒径约250 nm，比表面积达999.4 m²/g。Rot@HMSNs粒径均一，载药率达46.7%，具有良好的释放特性，释放模型符合Ritger-Peppas释放模型。HMSNs显著提高了鱼藤酮在黄瓜植株中的吸收和传导能力。

结论通过纳米载体HMSNs可以提高鱼藤酮的利用率，此研究对于减少农药使用量、降低环境污染具有重要意义。

Abstract:
Objective Nanocarrier was used as pesticide carrier to improve the utilization ratio of pesticide.

Method Hollow mesoporous silica nanoparticles (HMSNs) were synthesized by self-template method using water as etchant on the basis of solid mesoporous silica nanoparticles (MSNs). Botanical pesticide rotenone was loaded into HMSNs (Rot@HMSNs) by solvent evaporation method. The sustained-release property and insecticidal activity of Rot@HMSNs were determined. Distribution of rotenone in Rot@HMSNs of cucumber was obtained by HPLC.

Result The particle size of HMSNs was about 250 nm and the specific surface area was 999.4 m²/g. The prepared Rot@HMSNs had uniform particle size and a considerable loading rate of rotenone (46.7%). The Rot@HMSNs had good releasing performance and the release model was in accordance with the Ritger-Peppas model. HMSNs significantly improved the uptake and translocation abilities of rotenone in cucumber plants.

Conclusion The utilization rate of rotenone can be improved by nanocarrier HMSNs. The study is of great significance for reducing pesticide use and environmental pollution.

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