Fabrication a Photoresponsive Film for Controlled Pesticide Release

Abstract

To design and prepare targeted pesticides with environmentally responsive controlled release via compound and chemical modifications has shown great potential in creating novel pesticide formulations. Biological pesticide has spurred demand for efficient and effective delivery systems. In this work, an environmentally photoresponsive controlled release pesticide film was developed by encapsulating biological pesticide with spiropyran-grafted polyacrylic acid polymer as carrier and carboxymethyl chitosan as film-forming agent. Spiropyran-grafted polyacrylic acid polymer carrier had the characteristics of pH and light response. Under the pH response, pesticides were encapsulated. And under the light response, controlled release of pesticides was realized. A series of biological pesticides were encapsulated in the photoresponsive carrier and had high encapsulation rate. The photoresponsive polymer films could therefore be considered an efficient material for application in controlled release systems in agriculture.