Nanocomposites and nanomaterials 
The use of nanosized regulators for the effectiveness of fire protection coatings enhancement 
Raks V.A.1, Barrat S. 2, Yezhov S.V.3, Daklan D.V3., Myronyuk O.V.3
1 Taras Shevchenko National University of Kyiv. Lva Tolstoho Street, 12,, Kyiv-01033, Ukraine. 
E-mail: victoriia2005@gmail.com
2 Ecole Nationale Superieure des Mines de Nancy, Site Artem Nancy-54000, France.
3National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Peremohy Prospect, 37, Kyiv-03056, Ukraine.

The carbon foam provides the total thermal insulation performance of intumescent systems, passive fire protection coatings. The structure of such foam is defined by the foaming speed, blowing agent type and its content, etc. One of the most promising ways of the structure developing is the fine adjustment of the melt rheology. It was shown, that the flow parameters of the liquid systems may be affected by a polymer type, a structure selection and a plasticizer type. On the other hand, nanoscale pigments, such as surface treated Na+montmorillonite and hydrophobized fumed silica may be used as the melt rheology controller. 
The goal of this study was the assessment of the aforementioned nanoparticles on the carbon foams structure and the total fire resisting properties of the intumescent coating. It was found, that the concentration dependences are of extreme type with an optimum in the 0,3-1,0 wt. % area. And if the nanoclay acts as mild thixotropic and thickening agent, the silica at extremely low concentration even thinning the melt, but in the optimum range increases the viscosity. The addition of such viscosity controllers provides the regulation of the mean foam bubble size and the thickness of intercellular membranes. This determines the total fire insulation property of the composites to be increased in the range of 15-20 % in comparison to the non-adjusted starting formulation. 

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