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- 저자 : Jiexiang Liu (검색결과 1 건)
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Fabrication of the Pesticide-Attapulgite composites regulated by mixed-surfactants
Jiexiang Liu,Ruili Bai,Xiaoguang Zhang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.119 No.-
The SB (DTAB, TTAB, CTAB, OTAB)-AP complex was obtained by modifying attapulgite (AP) with surfactantof SB (DTAB, TTAB, CTAB, OTAB). The structures were characterized by XRD, FT-IR, TGA/DTA and SEM. A new lamellar structure is formed by introducing surfactant. The basal spacing increases with theincrease of alkyl chain length of cationic surfactants. Then, the beta-cypermethrin (BCT) composites ofBCT/SB-AP, BCT/DTAB (TTAB, CTAB, OTAB)-SB-AP were prepared and investigated. The basal spacingsof BCT composites were larger than those of SB-AP and the corresponding DTAB (TTAB, CTAB, OTAB)-AP. The existence of BCT and surfactants molecules into BCT composites was further confirmed. TheBCT/DTAB (TTAB, CTAB, OTAB)-SB-AP have the smaller specific surface areas than DTAB (TTAB, CTAB,OTAB)-AP due to the increase of AP exfoliation in the presence of SB. Fabrication mechanism of BCT compositeswas put forward. Release behaviors of BCT were investigated and analyzed in different buffersolutions. The existence of mixed-surfactants influenced distinctly the release rates. BCT compositeshad the slow release property. The release behaviors were well fitted by pseudo second-order and parabolicdiffusion models. This study provided a new approach to improve the utilization efficiency of pesticideand could be applied as a pesticide delivery system.
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