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Citation: ZHANG Yuan, LI Yang, CHEN Bo, ZHU Bingyu, LIU Feng. Effects of Bentonite Modified by Organic Additives on the Physical Stability of Hexaconazole Suspension[J]. Chinese Journal of Applied Chemistry, ;2011, 28(5): 565-570. doi: 10.3724/SP.J.1095.2011.00414 shu

Effects of Bentonite Modified by Organic Additives on the Physical Stability of Hexaconazole Suspension

1.
Key Laboratory of Pesticide Toxicology & Application Technique, Shandong Agricultural University, Taian 271018

Corresponding author: LIU Feng,
Received Date: 15 July 2010
Available Online: 28 September 2010
Fund Project: 公益性行业(农业)科研专项经费项目(200903033) (农业)科研专项经费项目(200903033)

Four kinds of quaternary ammonium salt cationic surfactants(dodecyl benzyl dimethyl ammonium chloride(1227),tetradecyl dimethyl benzyl ammonium(1427),hexadecyl trimethyl ammonium bromide(1631) and octadecyl trimethyl ammonium bromide(1831)) were used to modify sodium bentonite(Na-Ben).The prepared organic bentonites(1227-Ben,1427-Ben,1631-Ben,1831-Ben) were characterized by Fourier transform infrared spectroscopy(FT-IR) and X-ray diffraction(XRD),and used as subsidence-resistance for preparing suspensions containing 5% hexaconazole.The suspension capability of bentonite modified by above four organic additives in water and the effects of these bentonites on the physical stability of suspensions were examined.FT-IR spectra and XRD analysis results showed that these four cationic surfactants were intercalated into the layer of bentonite.Suspension capability results indicated that 1831-Ben has a better suspension than the other three.Subsidence-resistance tests showed that bentonites modified by organic additives could improve the physical stability of suspensions.The water segregation ratio of samples prepared by 1831-Ben was the lowest,while the viscosity,yield value and suspension rate were the highest.So 1831-Ben could be used as a suspension-additive for the preparation of suspensions containing 5% hexaconazole.
- bentonite modified by organic additives,
- hexaconazole suspension,
- rheological characteristics,
- physical stability
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