CAJ | 학술논문

通过FTIR、SEM、XPS、zeta电位和粒度测试研究了双梳型共聚物AgrilanTM 752对吡虫啉悬浮剂分散稳定性的影响。结果表明AgrilanTM 752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；AgrilanTM 752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AgrilanTM 752的吸附层厚度和zeta电位负值最大；初始pH值超过6后AgrilanTM 752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AgrilanTM 752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+。
통과FTIR、SEM、XPS、zeta전위화립도측시연구료쌍소형공취물AgrilanTM 752대필충람현부제분산은정성적영향。결과표명AgrilanTM 752분자중존재최기、지기화취양을희미측련，통과경건、범덕화력화소수작용력결합필충람，종이유효지분산필충람과립；AgrilanTM 752용량여현부제적분산은정성밀절상관，실험조건하득출기최가용량위3%(질량분수)，차용량하AgrilanTM 752적흡부층후도화zeta전위부치최대；초시pH치초과6후AgrilanTM 752적흡부층후도축점강저，zeta전위재초시pH=10처존재최대부치，초시pH치재2～10범위내현부hina제적분산은정성보편교고，pH치초과10후분산은정성명현강저；전해질리자(Na+、Mg2+화 Ca2+)농도월고칙AgrilanTM 752적흡부층후도화zeta전위부치월저，현부제적분산은정성월차，상동농도하전해질리자대현부제적분산은정성영향정도순서위Ca2+>Mg2+>Na+。
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. AgrilanTM 752, 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 AgrilanTM 752 adsorbed layers, zeta potential and dispersion stability of suspension reached maximum values when its content was 3%(mass), i.e., the optimum AgrilanTM 752 content under this experimental conditions was 3%(mass). Thickness of AgrilanTM 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 AgrilanTM 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.