Developing long-acting and sustained release systems is a feasible and effective way to increase the efficiency of pesticides and help improve environmental pollution issues, especially for photosensitive pesticides. Here, an environment-friendly emamectin benzoate-loaded alginate/chitosan/sodium lignosulfonate (EB-loaded ALG/CS/SL) polyelectrolyte was successfully prepared via layer-by-layer self-assembly. The results of fourier transform infrared spectroscopy, thermogravimetric analyses, powder X-ray diffraction, size distribution and zeta potential analyses confirmed the formation of EB-loaded ALG/CS/SL via electrostatic interactions without chemical reaction, which would not affect the performance of emamectin benzoate (EB). Besides the high encapsulation efficiency (93.3 ± 2.08%), this protective coating strategy exerted an outstanding performance of sustained-release (up to 204 h) and anti-photolysis for EB. As a result, the degradation amount of EB in EB-loaded ALG/CS/SL could be reduced for 5.7 times than that of uncoated EB under UV light. This study provides a new natural polymer coating strategy to reduce loss of pesticides to non-target environments, and will extend the applications of rich natural polymer resources.

开发长效和持续释放系统是提高农药效率并帮助改善环境污染问题（尤其是光敏农药）的可行而有效的方法。在这里，通过逐层自组装成功地制备了环境友好型阿曼菌素负载的海藻酸盐/壳聚糖/木质素磺酸钠（EB负载的ALG / CS / SL）聚电解质。傅立叶变换红外光谱，热重分析，粉末X射线衍射，粒度分布和Zeta电位分析的结果证实了在没有化学反应的情况下，通过静电相互作用形成了负载EB的ALG / CS / SL，这不会影响Emamectin的性能。苯甲酸酯（EB）。除了高封装效率（93.3±2.08％），这种保护性包衣策略对EB具有出色的持续释放（长达204小时）和抗光解性能。结果，在紫外光下，EB负载的ALG / CS / SL中的EB降解量可比未涂覆的EB减少5.7倍。这项研究提供了一种新的天然聚合物涂层策略，以减少农药向非目标环境的损失，并将扩展丰富的天然聚合物资源的应用范围。