Redox- and Enzyme-Responsive Macrospheres Gatekept by Polysaccharides for Controlled Release of Agrochemicals
| Autor: | Huining Xiao, Roshanak Miraftab, Hou Xiaobang, Yuanfeng Pan, Huang Zhihong |
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| Rok vydání: | 2021 |
| Předmět: |
02 engineering and technology
Cellulase 010402 general chemistry 01 natural sciences Redox chemistry.chemical_compound medicine Hydrogen peroxide Dissolution Drug Carriers biology General Chemistry Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology Controlled release 0104 chemical sciences Carboxymethyl cellulose chemistry Carboxymethylcellulose Sodium Delayed-Action Preparations Reagent biology.protein Agrochemicals 0210 nano-technology General Agricultural and Biological Sciences Oxidation-Reduction Salicylic acid medicine.drug Nuclear chemistry |
| Zdroj: | Journal of Agricultural and Food Chemistry. 69:11163-11170 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/acs.jafc.1c01304 |
| Popis: | Stimuli-responsive materials afford researchers an opportunity to synthesize controlled-release carriers with various potential applications, especially for reducing the abuse of chemical reagents in farmland soil. To enhance the efficiency of agrochemical utilization, redox- and enzyme-responsive macrospheres were prepared by self-assembling β-cyclodextrin-modified zeolite and ferrocenecarboxylic acid (FcA)-grafted carboxymethyl cellulose (CMC). Scanning electron microscopy and Brunauer-Emmett-Teller analysis revealed that pores of zeolite were sealed by the surface coupling of FcA-modified CMC via the formation of an inclusion complex. Salicylic acid (SA) was loaded as a model agrochemical. The release of SA from macrospheres could be triggered in the presence of hydrogen peroxide (oxidant) and cellulase (enzyme); and the corresponding release percentages, 85.2 and 80.4%, were much higher than those of the control sample without responsive groups in water (12.6%) after 12 h. A release kinetic study showed that cellulase could promote carrier dissolution more effectively than the oxidant. The results demonstrate that the dual-responsive macrospheres are promising as a smart and effective carrier for the controlled release of agrochemicals. |
| Databáze: | OpenAIRE |
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