POLY(VINYL ALCOHOL)-GRAFTED POLY(ACRYL AMIDE) HYDROGEL AND ITS INTERPENETRATING NETWORK FOR CONTROLLED RELEASE OF CYPERMETHRIN

摘要

Interpenetrating network (IPN) beads of poly(vinyl alcohol)-grafted acrylamide amide [PVA-g-AAm] and sodium alginate (Na-Alg) were prepared and used in the controlled release (CR) of cypermethrin, a pesticide. Grafting of PVA onto AAm, and subsequent formation of IPN beads was confirmed by FTIR. Encapsulation efficiencies and in vitro release kinetics have been studied.