Lignin-based controlled release materials and application in drug delivery and fertilizer controlled-release

Lignin, known as the second largest biomass resource and important renewable aromatic resources, is currently mainly dumped as industrial waste of cellulose, which causes serious resources and environmental problems. The development and high value utilization of lignin resources can reduce the environmental pollution caused by direct incineration and exert important significance on realizing the circle economy of lignocellulose resources and improving the feasibility, economic efficiency and sustainability of the biomass utilization. The abundant active functional groups and chemical reactive sites in the molecular structure of lignin, as well as its inherent degradability and biocompatibility, have attracted extensive attention in biomedical and green sustainable agriculture. Based on the structural characteristics of lignin, this paper introduced the application basis of lignin and its modified materials in biomedicine and green agricultural fertilizers, expounded the latest research and application progress of lignin-based controlled release systems in drug delivery and green fertilizer, and analyzed the challenges and the research directions in the future, in order to provide useful reference for the resource development and high-value utilization of lignin. © 2023 Chemical Industry Press. All rights reserved.