A temperature-responsive, positively charged nanofertilizer delivery system

Abstract

The application discloses a temperature response positive charge type nano-fertilizer delivery system, and belongs to the technical field of fertilizers. The delivery system is a regular circular core-shell structure with an average particle size of 80-120 nm, and is formed by encapsulating complex ions formed by humic acid and trivalent iron ions, with a positive polymer (PDMAEMA-b-PCL) as a carrier. The average Zeta potential range of the delivery system is 25-32 mV. The delivery system utilizes a temperature response unit to intelligently regulate and control surface charges. At normal temperature, the high positive charge of the delivery system can be strongly adsorbed on the surface of the negatively charged leaf, so that the deposition uniformity and the anti-scouring property are improved. After deposition, the environmental temperature is increased to trigger the in-situ reduction of the charge, so that the absorption barrier is broken, and the uptake capacity of the leaf for nutrients is optimized. Compared with other nano-fertilizers and commercially available fertilizers, the application has more excellent effects on promoting seed germination and crop growth and development, and crops show good concentration dependence, which proves the efficiency and application safety of the application.

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