摘要
以甲基烯丙醇聚氧乙烯醚、甲基丙烯酸羟乙酯和对苯乙烯磺酸钠为单体合成一种能溶于水的梳状三元聚磺酸盐分散剂,研究该分散剂的分子结构、分散性能和润湿性能,用红外、核磁、凝胶色谱进行聚合物结构表征,用光散射粒度分析仪和视频接触角测定仪分别对分散后的粒径分布和润湿效果进行表征。结果表明:在聚磺酸盐分散剂添加量为10%时,Zeta电位和悬浮率最佳,悬浮率能达到95.36%±1.08%,并且悬浮剂热贮前后平均粒径分别是0.796μm和1.125μm;稀释后在亲油和亲水叶片上的动态接触角衰减系数分别是0.29和0.48。该聚磺酸盐分散剂能有效地吸附在二甲戊灵颗粒表面并产生静电作用和空间位阻作用,使制备的高浓度二甲戊灵悬浮体系稳定。
A water-soluble comb-like ternary polysulfonate dispersant was prepared by using methyl allyl alcohol polyoxyethylene ether,2-hydroxyethyl methacrylate and styrene sulfonic sodium as the monomers.The molecular structure,dispersion and wetting properties of the dispersant were studied.The polymer structure was characterized by infrared,nuclear magnetic and gel chromatography.The particle size distribution and wetting effect were characterized by a video contact angle meter and a light scattering particle size analyzer.The results showed that when the amount of polysulfonate dispersant was 10%,the Zeta potential and suspension rate were the best,and the suspension rate could reach 95.36%±1.08%.The average particle size of the suspension before and after heat storage was 0.796μm and 1.125μm,respectively.The attenuation coefficients of dynamic contact angle on lipophilic and hydrophilic leaves after dilution were 0.29 and 0.48,respectively.The polysulfonate dispersant can effectively adsorb on the surface of pendimethalin particles and provide electrostatic action and steric hindrance,so that the prepared high-concentration pendimethalin suspension system is stable.
作者
余枭
董强
裴克梅
YU Xiao;DONG Qiang;PEI Kemei(School of Sciences,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2019年第4期537-543,共7页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金项目(21673208)
浙江省自然科学基金项目(LY16B070009)
关键词
聚磺酸盐分散剂
二甲戊灵悬浮剂
热贮性能
分散性能
润湿性能
polysulfonate dispersant
pendimethalin suspension
heat storage performance
dispersion properties
wetting performance
