Unprecedented polyvinyl polymer loading on SWCNTs in the liquid phase
Leshan Usgodaarachchi1,2, Eleftheria Zelou1,2, Vikraman Haribaskar2
1Université Gustave Eiffel, COSYS/IMSE, 14-20 boulevard Newton, Champs sur Marne, 77447 Marne-la-Vallée Cedex 2, France. berengere.lebental@univ-eiffel.fr.
Nanoscale
|December 22, 2025
Summary
Researchers achieved exceptionally high polymer adsorption on single-walled carbon nanotubes (SWCNTs) in liquid phase. This breakthrough offers significant potential for CO2 sequestration and environmental remediation applications.
Area of Science:
- Materials Science
- Environmental Science
- Nanotechnology
Background:
- Carbon nanotubes (CNTs) show promise for reducing pollution but have limited adsorption capacity in solid-phase applications.
- Liquid-phase functionalization of CNTs is of interest, yet maximum adsorption capacities remain understudied.
Purpose of the Study:
- To investigate the liquid-phase adsorption kinetics and capacities of specific polyvinyl polymers onto single-walled carbon nanotubes (SWCNTs).
- To explore potential applications in environmental remediation, including CO2 sequestration.
Main Methods:
- Utilized UV-Vis spectroscopy to monitor the adsorption of three polyvinyl polymers onto SWCNTs dispersed in N-methyl-2-pyrrolidone.
- Analyzed adsorption kinetics and equilibrium data, modeling capacities using Freundlich isotherms.
Main Results:
- Achieved exceptionally high polymer adsorption capacities, up to 20 g/g SWCNTs, significantly exceeding solid-phase studies.
- Freundlich isotherm exponents near 1 indicated a homogeneous adsorption process influenced by polymer-SWCNT and polymer-polymer interactions.
Conclusions:
- Liquid-phase adsorption onto SWCNTs demonstrates remarkably high capacities, surpassing traditional materials.
- These findings suggest promising applications for SWCNTs in CO2 capture, air purification, and water treatment.
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