II International Symposium on Carbon for Catalysis ABSTRACTS

PP-I-35
THE CHARACTERISTIC SUCH AS FRAME OF DISPERSED CARBON
BY THE MACROMOLECULES ADSORPTION METHOD
Razdiakonova G.I., Dugnova Y.V., Razdiakonov Y.V. 1
Institute of Hydrocarbons Processing SB RAS, Omsk, Russia
1 The Russian Correspondence Institute Textile and Light Industry, Omsk, Russia
E-mail: uglerod@ihpp.okno.ru
For characteristic of dispersed carbon structure type with the macromolecule adsorption
method the adsorption of globule polyethylene glycol from aqueous solutions in the range of
hydrodynamic diameter d from 1 to 11 nm with carbon black has been studied. From the
adsorptive data the surface fractal analysis of active carbon black patterns used at rubber
production (foreign marks: N 339, N 375, and domestic ones: P 245, P 234, N-339 which
have been recovered by the “traditional” and “advanced” technologies) has been fulfilled.
The surface fractal dimension in macromolecular medium D was determined by the
formula:
n ~ s – D , where n is the quantity of molecules in monolayer,
s is the cross-section area of the adsorbed substance molecule.
The quantity of molecules in monolayer was calculated from the maximum adsorption values
for polyethylene glycol a ∞ (g/g) which were accordingly determined from equilibrium
isotherm recovered in static conditions at 298 K according to the formula:
n=a ∞ N a /M, where M is an average molecular weight of polyethylene glycol,
N a is Avogadro constant.
It is known that surface fractal defines its texture complexities. Fractal values for flat
surface are equal to 1, and they approach to 2 for convexo-concave one.
According to reinforcing activity in common destination caoutchouc-based rubbers fillers
are arranged abreast similarly to growth row of surface fractal in macromolecular medium.
Modelling parameters
The effect on fractal value in the following directions has been studied:
• spheroid particles size (P 514, P 234, P 145 row);
• degree of aggregates divarication (N 339* > N 375* > N 326; P 145 > P 161);
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