21 research outputs found
Synthesis and Insecticidal Activity of Enzyme-Triggered Functionalized Hollow Mesoporous Silica for Controlled Release
In the present study,
enzymatic responsive controlled release formulations
(CRFs) were fabricated. The CRFs were achieved by anchoring mechanically
interlocked molecules using α-cyclodextrin onto the surface
pore rims of hollow mesoporous silica (HMS). The CRFs were characterized
using Fourier transform infrared spectroscopy, scanning electron microscopy,
transmission electron microscopy, and thermogravimetric analysis.
The results showed that the CRFs had extraordinary loading ability
for chlorantraniliprole (42% w/w) and could effectively preserve chlorantraniliprole
against degradation under thermal conditions and UV radiation. The
CRFs have been proven to be enzyme-sensitive. The release ratio of
chlorantraniliprole from CRFs can be accelerated observably when external
α-amylase was introduced. The persistence of CRFs was evaluated
by regular sampling feeding experiment using <i>Plutella xylostella</i> as the target insect. The results showed that the larval mortality
of <i>P. xylostella</i> was much higher than that of Coragen
under all concentrations after 14 days, which proved that CRFs had
remarkable persistence