Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 69, Issue 38, Pages 11163-11170Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.1c01304
Keywords
redox-responsive; enzyme-responsive; agrochemical; reversible inclusion complexation; polysaccharide
Funding
- NSERC Canada
- Dean Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology [2019Z003]
- NSF China [22068006]
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Stimuli-responsive materials like redox- and enzyme-responsive macrospheres have been successfully prepared for controlled-release carriers in farmland soil to reduce chemical reagent abuse. These dual-responsive macrospheres show great promise as smart and effective carriers for the controlled release of agrochemicals.
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 beta-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.
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