Structure and flow behavior of dilute dispersions of carbon nanotubes in polyacrylonitrile–dimethylsulfoxide solution

0460138 - ÚMCH 2017 RIV DE eng J - Článek v odborném periodiku
Karpushkin, E. - Gvozdik, N. - Klimenko, M. - Filippov, Sergey K. - Angelov, Borislav - Bessonov, I. - Sergeyev, V.
Structure and flow behavior of dilute dispersions of carbon nanotubes in polyacrylonitrile–dimethylsulfoxide solution.
Colloid and Polymer Science. Roč. 294, č. 7 (2016), s. 1187-1195. ISSN 0303-402X. E-ISSN 1435-1536
Grant CEP: GA ČR(CZ) GC15-10527J
Institucionální podpora: RVO:61389013
Klíčová slova: carbon nanotubes * alignment * aggregation
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 1.723, rok: 2016

Rheological behavior of carbon nanotubes (at the concentration below the percolation threshold) finely dispersed in semidilute polyacrylonitrile–dimethylsulfoxide solution has been studied as a function of the applied pre-shear stress and discussed in view of possible structural changes induced by pre-shearing of the samples. The observed effects have been ascribed to a combination of processes involving alignment and association of the macromolecules as well as orientation and association of carbon nanotubes. The effects caused by the macromolecules alignment and association are mainly observed at low concentration of the filler and at high shear stress, whereas the processes involving carbon nanotubes reorganization are mainly observed at the higher filler content and at lower pre-shear stress. The nanotubes rearrangement under shear has been probed via hyphenated rheology–synchrotron X-ray small-angle scattering measurement.
Trvalý link: http://hdl.handle.net/11104/0260275