Amphiphilicity-Driven Small Alcohols Regulate the Flexibility of Pesticide-Loaded Microcapsules for Better Foliar Adhesion and Utilization.

The foliar loss of pesticides causes serious utilization decline and environmental risk. On the basis of biomimetics, pesticide-loaded microcapsules (MCs) with spontaneous deformation on foliar micro/nanostructures, like the snail suction cup, are prepared by interfacial polymerization. By controlling the usage or types of small alcohols in the MC preparation system, the flexibility of MCs is tunable. Through the investigation of emulsions and MC structures, we discover that the migration and distribution of small alcohols driven by amphiphilicity affect the process of interfacial polymerization between polyethylene glycol and 4,4-methylenediphenyl diisocyanate. By hydrophobic modification of the polymer and competition for oil monomers of small alcohols, the thickness and compactness of shells are reduced, whereas the density of the core is increased. As a result of the regulation in structures, the flexibility of MCs is improved significantly. In particularly, the MCs-N-pentanol (0.1 mol kg-1) with the best flexibility show strong scouring resistance on varied foliar structures, sustained release property on the air/solid interface, and persistent control effect against foliar diseases. The pesticide-loaded soft MCs provide an effective way to improve pesticide foliar utilization.

[1]  Hongjun Zhou,et al.  CMC based microcapsules for smart delivery of pesticides with reduced risks to the environment. , 2022, Carbohydrate polymers.

[2]  Jian Wang,et al.  Glutathione-Responsive Pyraclostrobin-Loaded Polyurea Microcapsules for Their Intelligent Controlled Release. , 2022, Journal of agricultural and food chemistry.

[3]  Peng Zhang,et al.  Octaphenyl polyoxyethylene regulates the flexibility of pyraclostrobin-loaded soft microcapsules by interfacial polymerization for better foliar adhesion and pesticide utilization , 2022, Chemical Engineering Journal.

[4]  Xinghua Gao,et al.  Facile fabrication of drug-loaded PEGDA microcapsules for drug evaluation using droplet-based microchip , 2021, Chinese Chemical Letters.

[5]  Lei Guan,et al.  Lambda-cyhalothrin-loaded nanocapsules pose an unacceptable acute toxicological risk to zebrafish (Danio rerio) at the adult and larval stages but present an acceptable risk to embryos. , 2021, Journal of hazardous materials.

[6]  Bei‐xing Li,et al.  Core/Shell Dual‐Responsive Nanocarriers via Iron‐Mineralized Electrostatic Self‐Assembly for Precise Pesticide Delivery , 2021, Advanced Functional Materials.

[7]  E. Herrero-Hernández,et al.  Assessment of pesticide residues in waters and soils of a vineyard region and its temporal evolution. , 2021, Environmental pollution.

[8]  W. Mu,et al.  Improved the Efficacy against Crop Foliage Disease by Regulating Fungicide Adhesion on Leaves with Soft Microcapsules. , 2021, Pest management science.

[9]  L. Regaldo,et al.  Influence of rainfall and seasonal crop practices on nutrient and pesticide runoff from soybean dominated agricultural areas in Pampean streams, Argentina. , 2021, The Science of the total environment.

[10]  A. McBratney,et al.  Risk of pesticide pollution at the global scale , 2021, Nature Geoscience.

[11]  W. Mu,et al.  Achieving Win-Win Ecotoxicological Safety and Fungicidal Activity of Pyraclostrobin-Loaded Polyurea Microcapsules by Selecting Proper Polyamines. , 2021, Journal of agricultural and food chemistry.

[12]  D. Weitz,et al.  Hydrogel Microcapsules with a Thin Oil Layer: Smart Triggered Release via Diverse Stimuli , 2020, Advanced Functional Materials.

[13]  Tongxi Yu,et al.  Dynamic plastic deformation and failure mechanisms of individual microcapsule and its polymeric composites , 2020, Journal of the Mechanics and Physics of Solids.

[14]  Hao Junjie,et al.  Efficacy and profitability of fungicide use to manage Curvularia leaf spot of maize , 2020 .

[15]  Yiling Nan,et al.  Roles of Alcohol as a Cosurfactant at Brine-Oil Interface Under a Typical Reservoir Condition. , 2020, Langmuir : the ACS journal of surfaces and colloids.

[16]  Shutao Wang,et al.  Interfacial Polymerization: From Chemistry to Functional Materials. , 2020, Angewandte Chemie.

[17]  D. Anco,et al.  Improved Management Efficacy of Late Leaf Spot on Peanut Through Combined Application of Prothioconazole with Fluxapyroxad and Pyraclostrobin , 2020, Agronomy.

[18]  Peng Zhang,et al.  Fungicide formulations influence their control efficacy by mediating physicochemical properties of spray dilutions and their interaction with target leaves. , 2020, Journal of agricultural and food chemistry.

[19]  Jonathan E. Didier,et al.  Controllable Fabrication of Inhomogeneous Microcapsules for Triggered Release by Osmotic Pressure. , 2019, Small.

[20]  L. D. Ploper,et al.  Evaluation of the efficacy and application timing of different fungicides for management of soybean foliar diseases in northwestern Argentina , 2019, Crop Protection.

[21]  Huajian Gao,et al.  Role of Nanoparticle Mechanical Properties in Cancer Drug Delivery. , 2019, ACS nano.

[22]  J. White,et al.  Nano-enabled strategies to enhance crop nutrition and protection , 2019, Nature Nanotechnology.

[23]  B. Gerowitt,et al.  Weather determines the occurrence of wheat stem base diseases in biogas cropping systems , 2018, Crop Protection.

[24]  J. Pretty.  Intensification for redesigned and sustainable agricultural systems , 2018, Science.

[25]  Feng Liu,et al.  Analysis of Particle Size Regulating the Insecticidal Efficacy of Phoxim Polyurethane Microcapsules on Leaves , 2018, ACS Sustainable Chemistry & Engineering.

[26]  B. D. Mattos,et al.  Green Formation of Robust Supraparticles for Cargo Protection and Hazards Control in Natural Environments. , 2018, Small.

[27]  Yan Wang,et al.  Development Strategies and Prospects of Nano-based Smart Pesticide Formulation. , 2017, Journal of agricultural and food chemistry.

[28]  Wei Hsin Chen,et al.  Improving the stability of diesel emulsions with high pyrolysis bio-oil content by alcohol co-surfactants and high shear mixing strategies , 2017 .

[29]  D. Weitz,et al.  Osmotic Pressure Triggered Rapid Release of Encapsulated Enzymes with Enhanced Activity , 2017 .

[30]  Feng Liu,et al.  Using Coordination Assembly as the Microencapsulation Strategy to Promote the Efficacy and Environmental Safety of Pyraclostrobin , 2017 .

[31]  B. Bhushan,et al.  Plant Surfaces: Structures and Functions for Biomimetic Innovations , 2017, Nano-micro letters.

[32]  Chengju Wang,et al.  Toxicity of three strobilurins (kresoxim‐methyl, pyraclostrobin, and trifloxystrobin) on Daphnia magna , 2017, Environmental toxicology and chemistry.

[33]  Jeffrey S. Moore,et al.  pH-Dependent Switchable Permeability from Core-Shell Microcapsules. , 2015, ACS macro letters.

[34]  D. Weitz,et al.  Polyurea microcapsules in microfluidics: surfactant control of soft membranes. , 2015, Langmuir : the ACS journal of surfaces and colloids.

[35]  A. Fery,et al.  Microcapsule mechanics: from stability to function. , 2014, Advances in colloid and interface science.

[36]  Min Wang,et al.  Controlling Pesticide Loss through Nanonetworks , 2014 .

[37]  H. D. H. Stöver,et al.  Layer-by-layer deposition of clay and a polycation to control diffusive release from polyurea microcapsules , 2011 .

[38]  Mick Hamer,et al.  The strobilurin fungicides. , 2002, Pest management science.