Regularities of flocculation of silica hydrosol at acrylamide copolymers of the Magnaflok brand

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• 作者：N. A. Shabanova ; I. A. Belova ; M. N. Markelova
• 关键词：silica hydrosol ; polyacrylamide ; aggregative stability ; heterocoagulation ; nanoparticles ; flocculation ; gelation
• 刊名：Glass Physics and Chemistry
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：41
• 期：5
• 页码：522-527
• 全文大小：300 KB
• 参考文献：1.Shabanova, N.A. and Sarkisov, P.D., Zol’–gel-tekhnologiya. Nanodispersnyi kremnezem (Sol–Gel Technology: Nanodispersed Silica), Moscow: BINOM Laboratoriya Znanii, 2012.
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  19.Shabanova, N.A. and Sergeeva, M.N., Aggregative stability and structure formation in binary mixtures of synthetic latex and silica hydrosol, Russ. J. Appl. Chem., 2011, vol. 84, no. 8, pp. 1422-425.CrossRef
  20.Sergeeva, M.N., Shabanova, N.A., and Verezhnikov, V.N., Specific features of the preparation of hybrid nanocomposites based on synthetic latexes and colloidal silica, in Uspekhi v khimii i khimicheskoi tekhnologii: Sbornik nauchnykh trudov. Tom. XXI (A Collection of Scientific Works: Advances in Chemistry and Chemical Technology: Volume XXI), Moscow: D.I. Mendeleyev University of Chemical Technology of Russia, 2007, no. 4 (72) pp. 26-0.
  
• 作者单位：N. A. Shabanova (1)
  I. A. Belova (1)
  M. N. Markelova (1)
  
  1. Mendeleyev University of Chemical Technology of Russia, Miusskaya pl. 9, Moscow, 125047, Russia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Ceramics,Glass,Composites,Natural Materials
  Characterization and Evaluation Materials
  Materials Science
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-313X

文摘

The aggregative stability of binary mixtures of silica hydrosols of the Ludox TM brand and solutions of acrylic polymers of the Magnaflok brand have been studied by the methods of viscometry, turbidimetry, electrophoresis, and dynamic light scattering. A decrease in the aggregate stability of colloidal silica and conformational contraction of macromolecular coils with the introduction of the electrolyte leads to the formation of polymer—silica floccules. Flocculation of silica particles at macromolecules proceeds via the mechanism of heterocoagulation. When forming the hybrid polymer—silica particles, the aggregative stability of the dispersed systems grows, the coagulation rate decreases, and the time of gelation increases. Keywords silica hydrosol polyacrylamide aggregative stability heterocoagulation nanoparticles flocculation gelation