Development of leaf-adhesive polyurethane microcapsules loaded with prochloraz for enhanced fungicide efficiency

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2024-09-02 DOI:10.1016/j.reactfunctpolym.2024.106034

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Abstract

Leaf-adhesive pesticide microcapsules represent a promising approach to improving pesticide efficacy while minimizing environmental pollution. In this study, we developed a leaf-adhesive polyurethane microcapsule loaded with prochloraz (Pro@CS-OP-10) using a reactive emulsifier (OP-10) via interfacial polymerization. Physicochemical analysis revealed microcapsules with smooth surfaces and uniform distribution, averaging 1.97 μm in size, with an encapsulation efficiency of 96.38 %. Comparative assessments demonstrated superior wetting and adhesion properties of Pro@CS-OP-10 on wheat leaves compared to other commercial formulations. Moreover, the polyurethane shell effectively enhanced the photostability of encapsulated prochloraz and hindered its rapid release. Fungal growth rate experiments indicated prolonged inhibitory effects of Pro@CS-OP-10 on Fusarium graminearum, with median inhibitory concentrations (EC₅₀) on the second and eighth day being 0.018 mg/L and 0.045 mg/L. Therefore, the leaf-adhesive Pro@CS-OP-10 shows great potential as an environmentally friendly fungicidal formulation.

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开发叶片粘附型聚氨酯微胶囊，内含丙环唑，提高杀菌效率

叶片粘附杀虫剂微胶囊是一种既能提高杀虫剂药效又能减少环境污染的有效方法。在这项研究中，我们利用活性乳化剂（OP-10），通过界面聚合技术开发了一种叶片粘附型聚氨酯微胶囊，其中装载有丙草胺（Pro@CS-OP-10）。理化分析表明，微胶囊表面光滑，分布均匀，平均大小为 1.97 μm，封装效率为 96.38%。比较评估结果表明，与其他商业配方相比，Pro@CS-OP-10 在小麦叶片上的润湿性和粘附性更为出色。此外，聚氨酯外壳有效地提高了封装的丙草胺的光稳定性，并阻碍了其快速释放。真菌生长速度实验表明，Pro@CS-OP-10 对禾本科镰刀菌的抑制作用持续时间较长，第二天和第八天的中位抑制浓度（EC50）分别为 0.018 毫克/升和 0.045 毫克/升。因此，叶片粘合剂 Pro@CS-OP-10 作为一种环境友好型杀菌制剂显示出巨大的潜力。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.