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Electrostatic wrapping of eupatorium-based botanical herbicide with chitosan derivatives for controlled release.
- Source :
-
Carbohydrate Polymers . Nov2020, Vol. 247, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- • Electrostatic wrapping of botanical herbicide with chitosan derivatives was realized. • The release of botanical herbicide using chitosan as carrier was well controlled. • The release kinetics of chitosan-carried botanical herbicide in water was investigated. • The released herbicide from chitosan carrier showed fine herbicidal effect on grass. To avoid the negative effects of chemical herbicides and prepare herbicide with long-term efficacy, the active ingredients of eupatorium adenophorum spreng (AIEAS, negatively charged) were used as a botanical herbicide, and based on electrostatic attraction, the self-assembled hydroxyl isopropyl chitosan (HPCTS, positively charged) and carboxymethyl chitosan (CMC, with good water solubility) were successfully employed as degradable and water-soluble carrier for AIEAS to realize its controlled release. The release of AIEAS from the chitosan carrier in water could be divided into two stages. In the first stage, a fast release of AIEAS was detected and the total amount of the released AIEAS reached 41.5 %, while the release rate effectively slowed down in the second stage, indicating that good balance between fast control of weeds and long-term efficacy was achieved through this controlled delivery system. The release kinetics of AIEAS during the whole release process showed good fit to the Ritger-Peppas model with Fickian diffusion as the dominant release mechanism. Moreover, it found that the released AIEAS from chitosan carrier showed fine herbicidal effect on barnyard grass. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01448617
- Volume :
- 247
- Database :
- Academic Search Index
- Journal :
- Carbohydrate Polymers
- Publication Type :
- Academic Journal
- Accession number :
- 145233488
- Full Text :
- https://doi.org/10.1016/j.carbpol.2020.116700