Nano powder avermectin sustained-release formulation of new research

 

 

 

       In the porous hollow nano-SiO2 as slow release carrier using supercritical embedding method, combined with milling and spray drying the dispersion process for preparing a UV degradation dual characteristics of avermectin nano powders having sustained-release and prevention. HPLC analysis table Minge Wei streptozotocin did not change before and after the preparation of the nature of the formulation. After the slow-release powder prepared by aqueous dispersion particle diameter of about 200 ~ 500 nm, evenly distributed. Suspension storage stability and thermal stability of pesticide formulations are in line with national standards. No formulation of the drug-loaded microspheres microcapsules reunion because of serious drug release process resistance, the drug cumulative release of only about 60% after 1400min; and dissolution of sustained-release powder that is released before the 5 min 70%, with rapid culling pests effect, while the remaining pesticides in a more gentle rate of release, the cumulative release at 100 min after 80%, and the carrier can be protected without ultraviolet degradation.