Adsorption properties of naphthalenesulfonate dispersant onto different crystal pyraclostrobin particle surfaces

被引：0
|
作者：
Wang L. [1 ]
Jiang Z. [1 ]
Xu Y. [1 ]
Chen H. [1 ]
Xiang S. [1 ]
Guo X. [1 ]
Wu X. [1 ]
机构：
[1] College of Science, China Agricultural University, Beijing
来源：
Wu, Xuemin (wuxuemin@cau.edu.cn) | 2018年 / Materials China卷 / 69期
关键词：
Adsorption; Crystal; Dispersant; Kinetics; Naphthalenesulfonate; Pyraclostrobin; Thermodynamics;
D O I：
10.11949/j.issn.0438-1157.20171412
中图分类号：
学科分类号：
摘要：
The adsorption properties of naphthalenesulfonate dispersant onto different crystal pyraclostrobin particle surfaces were characterized by XRD, DSC, UV, FTIR, XPS, and SEM. The results suggested that adsorption of naphthalenesulfonate dispersant didn’t change pyraclostrobin crystal. The adsorption kinetics shows that the adsorption dispersant D425 onto different crystal pyraclostrobin particle surfaces corresponds with pseudo-second-order adsorption rate equation. The adsorption process of different crystal pyraclostrobin is physical adsorption with Ea (crystal Ⅱ)=16.04 kJ·mol-1 and Ea (crystal Ⅳ)=12.42 kJ·mol-1.The adsorption process of different crystal pyraclostrobin is fitted with Langmuir isotherm equation. The values of crystal Ⅱ ΔHad = 20.64 kJ·mol-1 indicated that the adsorption process of crystal Ⅱ is endothermic process, and higher temperature is beneficial to the D425 adsorbed onto crystal Ⅱ particle surfaces. The values of crystal Ⅳ ΔHad=-15.26 kJ·mol-1 indicated that the adsorption process of crystal Ⅳ is exothermic process, and higher temperature is not beneficial to the D425 adsorbed onto crystal Ⅳ particle surfaces. © 2018, Science Press. All right reserved.
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页码：2540 / 2550
页数：10
相关论文
共 35 条
  • [1] Ning L.L., Some thoughts on the crystallization of drug research, Drug Evaluation, 4, 4, pp. 304-306, (2007)
  • [2] Qiang G.F., Lu Y., Du G.H., The present situation and development direction of the research for polymorphic drug in China, Chinese Journal of New Drugs, 13, pp. 1196-1200, (2009)
  • [3] Yang L.J., Bai Y.L., Strobilurin fungicide-pyraclostrobin, Modern Agrochemicals, 11, 4, pp. 46-50, (2012)
  • [4] Zuo W.J., Zhu Y.F., Zhuang Z.X., Et al., Research status and prospects of pyraclostrobin, World Pesticides, 39, 1, pp. 22-25, (2017)
  • [5] Ziegler H., Mayer W., Krohl T., Et al., Crystalline modifications to pyraclostrobin: US7816392, (2010)
  • [6] Hua N.Z., Products and application of pesticide dispersants(Ⅰ), Modern Agrochemicals, 11, 4, pp. 1-5, (2012)
  • [7] Wu J.S., Pan Y.Q., Hong Y., Et al., Research progress of wetting dispersant in pesticide suspension concentrate, Guangdong Chemical Industry, 41, 23, pp. 96-97, (2014)
  • [8] Ma C., Xu Y., Guo X.Y., Et al., Adsorption properties of comb-shaped copolymer of polycarboxylic acid superplasticizer on the interface of fipronil particles, Chinese Universities, 34, 6, pp. 1441-1449, (2013)
  • [9] Hao H., Feng J.G., Ma C., Et al., Adsorption thermodynamics and kinetics of three anionic polymeric dispersants onto imidacloprid particle surface, CIESC Journal, 64, 10, pp. 3838-3850, (2013)
  • [10] Li Z.W., Method for the analysis of drug crystal forms, Chin. J. Vet. Drug, 40, 1, pp. 45-48, (2006)
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