Controlled Release Profile of Imidacloprid-beta-Cyclodextrin Inclusion Complex Embedded Polypropylene Filament Yarns

Imidacloprid-beta-cyclodextrin (IMI-beta-CD) inclusion complex was synthesized and effectively incorporated into filament yarns of polypropylene. The physical and thermal properties of IMI-beta-CD inclusion complex were determined by Fourier transform infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. According to the results, formation of the inclusion complex was achieved along with enhanced thermal stability. The release profile of imidacloprid was monitored by high-performance chromatography measurements. Dissolution time of the IMI-beta-CD inclusion complex was increased to 5 times that of the neat imidacloprid (from ( h to 48 h). Poylpropylene filament yarns containing 3 wt.% IMI-beta-CD inclusion complex released 84 wt.% of IMI within 21 days.