低泡型烯丙基聚氧乙烯甲基醚改性三硅氧烷的合成、性能及应用  

Synthesis,properties and applications of low-foaming allyl polyoxyethylene methyl ether modified trisiloxane

作　　者：姜霄云 田晓雨 杨森 谭成侠[1] 管仲达[2] JIANG Xiaoyun;TIAN Xiaoyu;YANG Sen;TAN Chengxia;GUAN Zhongda(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Zhejiang Research Institute of Chemical Industry,Hangzhou 310023,China)

机构地区：[1]浙江工业大学化学工程学院,杭州310014 [2]浙江省化工研究院,杭州310023

出　　处：《农药学学报》2021年第1期194-198,共5页Chinese Journal of Pesticide Science

基　　金：浙江省绿色农药2011协同创新中心开放基金资助项目.

摘　　要：为合成低泡型农用助剂,用七甲基三硅氧烷与烯丙基聚氧乙烯甲基醚(1a)进行加成,合成了未见文献报道的烯丙基聚氧乙烯(n=7)甲基醚改性三硅氧烷表面活性剂(2a)。通过红外光谱和核磁共振氢谱对2a的结构进行了确证。性能测试结果表明:质量分数为0.1%的2a水溶液的表面张力低于20.50 mN/m,30 s铺展直径52.5 mm,泡沫量36 mL,综合性能与国外低泡型农用助剂相当。相比于广泛使用的农用助剂FGM683,泡沫量减少了50%以上。室内生物活性测定结果表明,在25%噻虫嗪水分散粒剂(WG)中添加质量分数为0.1%的2a后,其对稻飞虱的LC50值为1.55(1.27~1.82)mg/L,而未添加2a的LC50值为2.01(1.71~2.34)mg/L。田间试验结果表明,在有效成分为225 g/hm^(2)的25%噻虫嗪WG中添加90 g/hm^(2)的2a,药后3 d和7 d对稻飞虱的防治效果分别增加5.8%和9.0%。本研究结果表明,低泡型聚醚改性三硅氧烷2a可显著增加25%噻虫嗪WG对稻飞虱的防治效果,可以作为桶混助剂用于水稻田稻飞虱的防治。To develop low-foam pesticide adjuvants,an novel allyl polyoxyethylene methyl ether modified trisiloxane surfactant(2a)was prepared by adding heptamethyltrisiloxane to allyl polyoxyethylene(n=7)methyl ether(1a).The structure of 2a was confirmed by FT-IR and 1H NMR.The surface tension of the 2a aqueous solution with a mass fraction of 0.1%was lower than 20.50 mN/m.The 30 s spreading diameter was 52.5 mm.And the foam volume was 36 mL.Overall,its comprehensive performance is comparable to foreign low-foam pesticide additives.Compared with the widely used pesticide adjuvant FGM683,2a could reduce the amount of foam by more than 50%.The results of indoor biological activity tests showed that after adding 0.1%of 2a to thiamethoxam 250 water-dispersible granules(WG),the LC50 value to N.lugens was 1.55(1.27-1.82)mg/L,while the LC50 value without 2a was 2.01(1.71-2.34)mg/L.Field test results showed that when 2a at the dose of 90 g/hm^(2)was added to the thiamethoxam 250 WG at the dosage of 225 g/hm^(2),the control effect on N.lugens was increased by 5.8%3 days after drug application and increased by 9.0%7 days after drug application.The results of this study show that low foam polyether modified trisiloxane 2a can significantly increase the control effect of thiamethoxam 250 WG on N.lugens.It can be used as a tank mixing aid for the control of N.lugens in rice fields.

关 键 词：低泡型 农用助剂 聚醚改性 三硅氧烷 助剂性能 田间防效 

分 类 号：TQ423[化学工程] S482.292[农业科学—农药学]