双梳型共聚物对吡虫啉悬浮剂分散稳定性的影响与表征

doi:10.3969/j.issn.0438-1157.2014.03.050

化工学报 ›› 2014, Vol. 65 ›› Issue (3): 1126-1134.DOI: 10.3969/j.issn.0438-1157.2014.03.050

• 材料化学工程与纳米技术 • 上一篇下一篇

双梳型共聚物对吡虫啉悬浮剂分散稳定性的影响与表征

郝汉¹, 冯建国², 马超¹, 陈保莹¹, 吴学民¹

1 中国农业大学应用化学系, 农业部农药化学与应用技术重点开放实验室, 北京 100193;
2 扬州大学园艺与植物保护学院, 江苏扬州 225009

收稿日期:2013-05-20 修回日期:2013-10-22 出版日期:2014-03-05 发布日期:2014-03-05
通讯作者: 吴学民
作者简介:郝汉（1992—），男，本科生。
基金资助:
国家“十二五”科技支撑计划项目（2011BAE06A06-10）；北京市大学生科学研究与创业行动计划项目（2012bj094）。

Influence of double comb-shaped copolymer on dispersion stability of imidacloprid suspension

HAO Han¹, FENG Jianguo², MA Chao¹, CHEN Baoying¹, WU Xuemin¹

1 Key Laboratory of Pesticide Chemistry and Application Technology, Ministry of Agriculture, Department of Applied Chemistry, China Agricultural University, Beijing 100193, China;
2 School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, Jiangsu, China

Received:2013-05-20 Revised:2013-10-22 Online:2014-03-05 Published:2014-03-05
Supported by:
supported by the National Key Technology Research and Development Program during the Twelfth Five-Year Plan Period (2011BAE06A06-10) and the Beijing Undergraduate Scientific Research and Entrepreneurship Action Plan (2012bj094).

摘要/Abstract

摘要： 通过FTIR、SEM、XPS、zeta电位和粒度测试研究了双梳型共聚物Agrilan^TM752对吡虫啉悬浮剂分散稳定性的影响。结果表明Agrilan^TM752分子中存在羧基、酯基和聚氧乙烯醚侧链，通过氢键、范德华力和疏水作用力结合吡虫啉，从而有效地分散吡虫啉颗粒；Agrilan^TM752用量与悬浮剂的分散稳定性密切相关，实验条件下得出其最佳用量为3%（质量分数），此用量下Agrilan^TM752的吸附层厚度和zeta电位负值最大；初始pH值超过6后Agrilan^TM752的吸附层厚度逐渐降低，zeta电位在初始pH = 10处存在最大负值，初始pH值在2～10范围内悬浮hina剂的分散稳定性普遍较高，pH值超过10后分散稳定性明显降低；电解质离子（Na⁺、Mg²⁺和Ca²⁺）浓度越高则Agrilan^TM752的吸附层厚度和zeta电位负值越低，悬浮剂的分散稳定性越差，相同浓度下电解质离子对悬浮剂的分散稳定性影响程度顺序为Ca²⁺ > Mg²⁺ > Na⁺。

关键词: 分散, 吡虫啉, 悬浮系, 稳定性, 双梳型共聚物

Abstract: In this paper, the influence of a double comb-shaped copolymer (AgrilanTM 752) on dispersion stability of imidacloprid suspension was studied with FTIR, SEM, XPS, zeta potential and particle size tests. Agrilan^TM752, which contained carboxyl groups, ester groups and poly-oxyethylene chain, combined with imidacloprid by hydrogen bond, van der Waals force and hydrophobic interaction, and dispersed imidacloprid particles in suspensions effectively. The experimental data indicated that thickness of Agrilan^TM 752 adsorbed layers, zeta potential and dispersion stability of suspension reached maximum values when its content was 3%(mass), i.e., the optimum Agrilan^TM 752 content under this experimental conditions was 3%(mass). Thickness of Agrilan^TM 752 adsorbed layers decreased at initial pH > 6, zeta potential had a maximum value at initial pH = 10. On the other hand, dispersion stability was good at initial pH from 2 to 10, and became worse with increasing initial pH value. Moreover, experimental results suggested that electrolyte ions, such as Na⁺, Mg²⁺ and Ca²⁺ reduced thickness of Agrilan^TM 752 adsorbed layers and zeta potential, and decreased the dispersion stability of imidacloprid suspension. Moreover, the ability of decreasing dispersion stability of imidacloprid suspension was Ca²⁺ > Mg²⁺ > Na⁺ at the same concentration.

Key words: dispersion, imidacloprid, suspensions, stability, double comb-shaped copolymer

中图分类号:

TQ450.4

郝汉, 冯建国, 马超, 陈保莹, 吴学民. 双梳型共聚物对吡虫啉悬浮剂分散稳定性的影响与表征[J]. 化工学报, 2014, 65(3): 1126-1134.

HAO Han, FENG Jianguo, MA Chao, CHEN Baoying, WU Xuemin. Influence of double comb-shaped copolymer on dispersion stability of imidacloprid suspension[J]. CIESC Journal, 2014, 65(3): 1126-1134.

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双梳型共聚物对吡虫啉悬浮剂分散稳定性的影响与表征

Influence of double comb-shaped copolymer on dispersion stability of imidacloprid suspension

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