1. Hollow lignin azo colloids encapsulated avermectin with high anti-photolysis and controlled release performance.
- Author
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Deng, Yonghong, Zhao, Huajun, Qian, Yong, Lü, Lei, Wang, Bingbing, and Qiu, Xueqing
- Subjects
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LIGNINS , *AVERMECTINS , *PHOTOLYSIS (Chemistry) , *CONTROLLED release technology , *COLLOIDS , *LIGHT scattering - Abstract
Lignin-based azo polymer (AL-azo-H) was prepared from alkali lignin (AL) and then used to prepare uniform colloids via self-assembly. Due to the unique UV-blocking performance, AL-azo-H colloids were applied to encapsulate photosensitive pesticide avermectin (AVM). The self-assembled structure of AL-azo-H colloids and their controlled release and anti-photolysis performances for AVM were investigated by dynamic light scattering (DLS), static light scattering (SLS), transmission electron microscopy (TEM) and high performance liquid chromatography (HPLC). Results show that AL-azo-H colloids are hollow spheres. Hollow AL-azo-H colloidal spheres have remarkable AVM encapsulation efficiency as high as 61.49% (w/w). The cumulative release amount of AVM encapsulated by AL-azo-H (AL-azo-H@AVM) after 120 h was 84% and the release was still going on. The decomposition rate of AL-azo-H@AVM was less than 41% even after 72 h of UV irradiation. Hollow AL-azo-H colloidal spheres showed excellent UV-blocking and controlled release performance for AVM. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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