Skip to main content Accessibility help
×
Home

Evolution of Carbon Self-Assembly in Colloidal Phase Diagram

  • V. Bouda (a1)

Abstract

The growth of the self-assembled structure of carbon colloidal particles has been studied [1]. The system of carbon particles was processed in electrical field in polymer melt with controlled ionic concentration. The interpretation of the complex evolution of the self-assembled structure of carbon particles was given in terms of phase transitions of colloidal systems of carbon particles.

Interactions between doublets of carbon black (CB) particles are interpreted in terms of DLVO approximation of interaction energy as multiples of average thermal fluctuation kT. Plots of the sum of energy of electrostatic repulsion and energy of van der Waals attraction versus separation between the doublets show the energy barriers to coagulation of high B and the energy wells with the secondary minima of depth W. The colloidal phase transitions appear at critical conjuncture of the concentration of ions in the medium and surface potential on the colloids. Six transition lines determine five phases of the assembly of carbon colloids in the proposed colloidal phase diagram: lateral vapor + axial vapor (vapor), lateral liquid + axial vapor (columnar liquid crystal), lateral liquid + axial liquid (smectic LC), lateral liquid + axial solid (nematic LC), and lateral solid + axial solid (solid).

The diagram provides a tool to control the evolution of carbon self-assembly. The eventual morphology depends on the route of the steps of the processing. During the time elapsed in the LC state, the structure can reorganize and the eventual coagulation produces various crystals. On the contrary, the route outside the LC state can produce glass.

Copyright

References

Hide All
1. Bouda, V. and Chladek, J. in Filled and Nanocomposite Polymer Materials, edited by Nakatani, A.I., Hjelm, R.P., Gerspacher, M., and Krishnamoorti, R., (Mat. Res. Soc. Symp. (Mater. Res. Soc. Proc. 661, Warrendale, PA, 2001) pp. KK5.17.1–KK5.17.6
2. Bouda, V., Chladek, J. and Mikesova, J., Proceedings of 6th European Conference on Rheology, ed. by Muenstedt, H. et al, p. 9798, LSP, University Erlangen, 97 (2002)
3. Rajagopalan, R. and Hiemenz, P. C., Principles of Colloid and Surface Chemistry, 3rd ed., Marcel Dekker, Inc., New York (1997)
a) Rajagopalan, R. and Hiemenz, P. C., Principles of Colloid and Surface Chemistry, 3rd ed., Marcel Dekker, Inc., New York (1997) p. 585,
b) Rajagopalan, R. and Hiemenz, P. C., Principles of Colloid and Surface Chemistry, 3rd ed., Marcel Dekker, Inc., New York (1997) p. 518
4. Usher, F. L., Proc. Roy. Soc. (London) A 125, 143 (1924)
5. Thomas, J. L. and McCorcle, H. H., J. Colloid Interf. Sci. 36, 110 (1971)
6. Sonntag, H., Florek, Th., and Silov, V., Adv. Colloid Interf. Sci. 16, 337 (1982)
7. Schueler, R., Petermann, J., Schulte, K., Wentzel, H., J. Appl. Polym. Sci., 63, 1741 (1997)
8. Bouda, V., Manual of Process Engineering and Technology Series 10/1996, Czech Society of Chemical Engineering, Prague 168 (1996)
9. Bouda, V., Rajman, J., Journal of Electrical Engineering 48 51 (1997)
10. Bouda, V., ASME Int. Mechanical Engineering Congress 1997 Dallas, TX, Proceedings: CAE and Intelligent Processing of Polymeric Materials, ASME, 281298 (1997)
11. Bouda, V., Boudova, L., Haluzikova, D., 1st Meeting of Czech and Slovak Structural Biologists, South Czech University Nove Hrady (2002).

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed