Effect of biocidal additives on the mesostructure of epoxy–siloxane bioactive coatings

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• 作者：T. V. Khamova ; O. A. Shilova ; G. P. Kopitsa…
• 关键词：sol–gel method ; epoxy–siloxane compositions ; biocides ; mesostructure ; small ; angle X ; ray scattering
• 刊名：Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：10
• 期：1
• 页码：113-122
• 全文大小：571 KB
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• 作者单位：T. V. Khamova (1)
  O. A. Shilova (1)
  G. P. Kopitsa (2)
  B. Angelov (3)
  A. Zhigunov (3)
  
  1. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, St. Petersburg, 193034, Russia
  2. Petersburg Nuclear Physics Institute, St. Petersburg, Gatchina, 188300, Russia
  3. Institute of Macromolecular Chemistry, Prague, 16206, Czech Republic
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Surfaces and Interfaces and Thin Films
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1819-7094

文摘

We investigate the structure formation of sol–gel synthesized epoxy–siloxane compositions with a ratio of the main precursors of R _{TEOS/EPONEX 1510} = 27/27 wt %, modified with biocidal additives of detonation nanodiamonds (c _DND = 0.13, 0.27, and 0.58 wt %), titanium dioxide (\(^cTi{O_2}\) = 0.1, 0.3, and 0.5 wt %), and Photosens (c _Ph = 0.04, 0.1, and 0.27 wt %), by small-angle X-ray scattering. Based on small-angle X-ray scattering (SAXS) data, it is revealed that the synthesized epoxy–siloxane xerogels are systems with a twolevel fractal structure, in the formation of which the siloxane component plays the dominant role. It is found that the introduction of small additions of detonation synthesis, titanium dioxide, or Photosens (less than 1 wt %) into the epoxy–siloxane compositions affects both the fractal dimension D _S of the surface and the size d _c1 of primary particles, and the fractal dimension D _M and sizes d _c2 of mass fractal clusters formed from them.