期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 5, 期 4, 页码 3321-3328出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.6b03180
关键词
Sodium lignosulfonate; Avermectin; Microsphere; Self-assembly; Antiphotolysis; Controlled release
资金
- Key Program of National Natural Science of China [21436004, 21476092]
- National Natural Science Foundation of China [21374032]
Considering the superior ultraviolet (UV) absorptivity and environmental friendliness of lignin, a novel lignin-based microsphere was prepared. Through self-assembly, sodium lignosulfonate (SL) and cetyltrimethylammonium bromide (CTAB) aggregated into uniform colloidal spheres (SL-CTAB). SL-CTAB performed a reversible aggregation behavior and was used as the shell material to prepare microspheres to encapsulate avermectin (AVM), a kind of photosensitive pesticide. Moreover, the microsphere (AVM@SL-CTAB) exhibited an uniform spherical structure. To reveal the excellent embedding capability of AVM@SL-CTAB, the controlled release and antiphotolysis performance for AVM were systematically investigated in this work. As a result, the encapsulation efficiency value of AVM@SL-CTAB reached to 62.58 +/- 0.06%. The release of AVM from AVM@SL-CTAB was still going on after 70 h, and its cumulative release amount at that time was 49.96 +/- 1.13%. The release process of AVM@SL-CTAB could be controlled by adjusting the doped proportion of SL-CTAB. The half-life (DT50) of AVM in AVM@SL-CTAB under UV irradiation could be prolonged for 7.35 times that of uncoated AVM. The enhanced photoprotection and the controlled release of AVM implied that SL-CTAB possessed a great application prospect for efficient pesticide utilization.
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