Amphiphilicity-driven octaphenyl polyoxyethylenes regulate soft microcapsules flexibility for better foliar adhesion and pesticide utilization  

作　　者：Haichao Cao Xuewen Jian Daxia Zhang Wenzheng Ling Guofu Zhang Yaozhong Zhang Hao Zong Chao Feng Dan Chen Feng Liu 

机构地区：[1]Key Laboratory of Tobacco Pest Monitoring&Integrated Management,Tobacco Research Institute of Chinese Academy of Agricultural Sciences,Qingdao,266101,PR China [2]Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests,College of Plant Protection,Shandong Agricultural University,Tai'an Shandong,271018,PR China [3]Shandong Provincial Department of Agriculture and Rural Affairs,Institute for the Control of Agrochemicals,Jinan,250013,PR China [4]Shandong Linyi Tobacco Co.,Ltd,Linyi,Shandong,276000,PR China

出　　处：《Advanced Agrochem》2024年第4期316-327,共12页现代农业化学（英文）

基　　金：supported by the National Natural Science of China(32272596);Key Research Development Program of Shandong Province(2022CXGC020710);Shandong Province Agricultural Major Technology Collaborative Promotion Plan(SDNYXTTG-2023-20);Central Publicinterest Scientific Institution Basal Research Fund(No.1610232023005);Major technology projects[110202201029(LS-13)].

摘　　要：Pesticide-loaded flexible carriers that allow for deformation and adhesion on crop leaves is an effective way to improve pesticide utilization.In interfacial polymerization,the addition of octaphenyl polyoxyethylene(OP)with different hydrophile lipophilic balances(HLBs)into the oil phase can regulate the flexibility of pyraclostrobinloaded microcapsules(MCs).Due to differences in amphiphilicity and molecular structure,OP redistributed on the oil-water two-phases and oil-water interface.With increasing HLB,the proportion of OP entering the aqueous phase increased.Furthermore,more OP with low HLB remained in the oil phase and occupied the oil-water interface,and these OPs participated in and regulated the interfacial polymerization to increase the thickness,reduce the compactness of the shell,and increase the hydroxyl and ether bond contents in the shell.Therefore,pyraclostrobin-loaded MCs with low HLB(11.5-12.5)OP-7 exhibited flexible deformation,strong foliar adhesion,good scouring resistance,and a high control effect on peanut leaf spot,which the disease severity was 3.67.For high HLB(16),OP-21-prepared MCs with compact shells were safer to zebrafish,which the safety index was 23.81.Using the amphiphilicity of OP molecules to drive their redistribution in an encapsulation system to regulate interfacial polymerization is an effective way to control the structure and performance of pesticideloaded MCs.

关 键 词：Interfacial polymerization Deformation ADHESION Flexible microcapsules Pesticide utilization ECOTOXICITY 

分 类 号：TG1[金属学及工艺—金属学]