农药学学报2017，Vol.19Issue(1)：100-106,7.DOI:10.16801/j.issn.1008-7303.2017.0014
分散剂萘磺酸盐甲醛缩合物对氟铃脲悬浮剂流变性的影响
Effects of naphthyl sulfonate formaldehyde condensation dispersant on the rheological properties of hexaflumuron suspension concentrate
庄占兴 1路福绥 2郭雯婷 1崔蕊蕊 1范金勇 1刘钰1
作者信息
- 1. 山东省农药科学研究院,山东省化学农药重点实验室,济南 250033
- 2. 山东农业大学化学与材料科学学院,山东泰安 271018
- 折叠
摘要
Abstract
In order to study the effect of naphthyl sulfonate formaldehyde condensation (NNO) on the rheological properties of hexaflumuron suspension concentrate (SC), and to facilitate its processing procedure, the rheology behavior of hexaflumuron SC prepared from with the variation of polymer dispersant NNO of different mass fractions, molecular weights and hexaflumuron mass fractions was studied by using the control stress rheometer. The results demonstrated that the rheological curve of hexaflumuron SC, which include NNO, coincided with the Herschel-Bulkley rheological model. The range of the NNO mass fractions and dosage affected the rheology property of hexaflumuron SC. With 3.0% NNO in mass fractions, the SC was pseudoplastic fluid. The flow behavior index (n) was less than 1.0 when the concentration of hexaflumuron was higher than 20%. The SC was bulging plastic fluid when the flow behavior index was higher than 1.0, while the hexaflumuron mass fractions were less than 15%. The yield value (τH) of hexaflumuron SC was correlated with the relative mass fractions of NNO and hexaflumuron. When the hexaflumuron mass fraction was too high, saturated adsorption was inhibited on the surface of hexaflumuron granule. Therefore the bare hexaflumuron granule surface overlapped with each other and formed structure with higher yield value. When the hexaflumuron mass fractions were moderate, saturated adsorption was achieved on the granule surface. When the hexaflumuron mass fraction was too low, the excess NNO can form a structure between the suspended granules of hexaflumuron and increase the yield value. Under this test conditionsthe viscidity and yield value of the hexaflumuron SC decreased with the increase of NNO molecular weight. The flow behavior index was also increased slightly, however, it was still less than 1. The properties of "shear thinning" of the pseudo-plasticity did not change, which indicated that the molecular weight of NNO and its concentration were both influential factors to the hexaflumuron SC rheology. The results showed that the yield valueτH and flow behavior index were higher in hexaflumuron SC with dispersant NNO than that with dispersant MOTAS under the same conditions.关键词
萘磺酸甲醛缩合物(NNO)/氟铃脲/悬浮剂/流变性/屈服值/流动行为指数Key words
naphthyl sulfonate formaldehyde condensation (NNO)/hexaflumuron/suspension concentrate/rheological property/yield value/flow behavior index分类
化学化工引用本文复制引用
庄占兴,路福绥,郭雯婷,崔蕊蕊,范金勇,刘钰..分散剂萘磺酸盐甲醛缩合物对氟铃脲悬浮剂流变性的影响[J].农药学学报,2017,19(1):100-106,7.
