Formation of Polymer-Carbon Nanotube Composites by Two-Step Supercritical Fluid Treatment.

Autor: Vorobei AM; Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119071 Moscow, Russia., Ustinovich KB; Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119071 Moscow, Russia., Chernyak SA; Chemical Department, Lomonosov Moscow State University, 119991 Moscow, Russia., Savilov SV; Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119071 Moscow, Russia.; Chemical Department, Lomonosov Moscow State University, 119991 Moscow, Russia., Parenago OO; Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119071 Moscow, Russia.; Chemical Department, Lomonosov Moscow State University, 119991 Moscow, Russia., Kiselev MG; G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 153045 Ivanovo, Russia.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2021 Dec 03; Vol. 14 (23). Date of Electronic Publication: 2021 Dec 03.
DOI: 10.3390/ma14237428
Abstrakt: An approach for polymer-carbon nanotube (CNT) composite preparation is proposed based on a two-step supercritical fluid treatment. The first step, rapid expansion of a suspension (RESS) of CNTs in supercritical carbon dioxide, is used to de-bundle CNTs in order to simplify their mixing with polymer in solution. The ability of RESS pre-treatment to de-bundle CNTs and to cause significant bulk volume expansion is demonstrated. The second step is the formation of polymer-CNT composite from solution via supercritical antisolvent (SAS) precipitation. SAS treatment allows avoiding CNT agglomeration during transition from a solution into solid state due to the high speed of phase transition. The combination of these two supercritical fluid methods allowed obtaining a polycarbonate-multiwalled carbon nanotube composite with tensile strength two times higher compared to the initial polymer and enhanced elasticity.
Databáze: MEDLINE
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