摘要
研究了聚羧酸盐分散剂(SD-819)和聚萘磺酸盐分散剂(SD-661)在水溶液中的表面性能;同时考察了分散剂添加量对500 g/L扑草净水悬浮剂(SC)中的吸附、Zeta电势和流变性能等的影响.结果表明,与分散剂SD-661相比,分散剂SD-819水溶液中的表面张力(γcmc)小,临界胶束浓度(cmc)和胶束生成自由能(ΔGmic)低,吸附量大,制备出的扑草净SC黏度低,流动性好,触变性优良.结果表明,聚羧酸盐分散剂更适用于高浓度扑草净SC的制备.
We studied the surface properties of polycarboxylate dispersant （SD-819） and polynaphthalene sulfonate dispersant（ SD-661 ） in aqueous solution. We also investigated the effects of the addition of dispersant on the adsorption, zeta potential, and theological properties of the 500 g/L suspension concentrate （SC） of prometryn. The results show that dispersant SD-819 have smaller surface tension（γcmc ）, lower critical micelle concentration（ cmc）, micelle formation free energy（△Gmic ） and bigger adsorption quantity in aqueous solution compared with the dispersing agent SD-661. Besides, prometryn SC prepared by SD-819 have low viscosity, good fluidity and excellent thixotropic. In conclusion, comparing two dispersants indicated that polycarboxylate dispersant is more suitable for the preparation of prometryn SC.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2017年第7期1278-1285,共8页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21642003)资助~~
关键词
分散剂
水悬浮剂
表面性能
流变性能
聚羧酸盐
聚萘磺酸盐
扑草净
Dispersant
Suspension concentrate
Surface property
Rheological property
Polycarboxylate
Naphthalenesulfonate
Prometryn
