分散剂
悬挂(拓扑)
木质素
光解
化学
杀虫剂
化学工程
有机化学
色散(光学)
农学
工程类
数学
生物
物理
光学
纯数学
同伦
作者
Ruifen Peng,Yuxia Pang,Xueqing Qiu,Yong Qian,Mingsong Zhou
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2020-01-01
卷期号:10 (23): 13830-13837
被引量:24
摘要
In the formulation of pesticide Suspension Concentrate (SC), some photosensitive pesticides are easily decomposed in the preparation. In this study, a hindered amine modified lignosulfonate (SL-Temp) with anti-photolysis function was synthesized using 4-amino-2,2,6,6-tetramethylpiperidine (Temp) and Sodium Lignosulfonate (SL) to solve this problem. The obtained SL-Temp was used as a dispersant to prepare 5% SC of avermectin, which shows good physical stability. The decomposition rate of the avermectin in SC after accelerating hot storage is 0%, which is much lower than 6.1% when SL was used as the dispersant. After being exposed to UV irradiation for 60 hours, the highest retention rate of avermectin is 87.1% when SL-Temp was used as the dispersant, which is much higher than 73.6% when SL was used as the dispersant, and also higher than 76.3% when a small molecule antioxidant (BHT) was added to the formulation. QCM-D studies revealed that the SL-Temp adsorption layer on avermectin particles can compete to absorb partial ultraviolet rays, hinder the penetration of ultraviolet light, and scavenge the free radicals produced by photooxidation, so as to protect avermectin from degradation.
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