Eduard LYSENKOV, Mykola HYLKO, Viktioriya BILA
Petro Mohyla Black Sea National University, 68 Desantnykiv Str., 10, 54003 Mykolaiv, Ukraine e-mail: ealysenkov@ukr.net
DOI: https://doi.org/10.37827/ntsh.chem.2022.70.016
INFLUENCE OF NONCOVALENT MODIFICATION OF CARBON NANOTUBES BY POLYETHYLENE GLYCOL ON THEIR DISTRIBUTION IN THE POLYMER MATRIX
In polymer nanocomposites filled with carbon nanotubes, it is very difficult to ensure uniform distribution of nanotubes in the polymer matrix, as well as the stability of this dispersion over time. Therefore, in such systems, over time, due to the strong van der Waals forces of attraction between individual nanotubes, aggregation of filler particles takes place. It leads to a transition from the nano to the micro level of their structural organization. This transition significantly affects the complex of functional properties of polymer nanocomposites filled with carbon nanotubes (CNTs). Therefore, the development of new approaches to the stabilization of nanoparticles in order to prevent their aggregation to create nanocomposite materials with improved functional characteristics is an actual task. The work is devoted to the study of the influence of non-covalent modification of carbon nanotubes on the degree of their distribution in the polymer matrix of polyethylene glycol. The peculiarities of CNT distribution of two types were studied: unmodified and non-covalently modified nanotubes. It was found that unmodified CNTs contained hydroxyl, carboxyl and lactone groups on the surface. The presence of these groups on the surface of CNTs allowed for their noncovalent modification. The analysis of microscopic images revealed that the modified CNTs are more evenly distributed in the polymer matrix than the unmodified nanotubes, which can be explained by the different nature of the interaction between the polymer matrix and the CNT. It is shown that for systems containing modified CNTs, a higher value of fractal dimension is observed, which indicates the formation of more fluffy aggregates with CNTs, while unmodified CNTs tend to form denser aggregates. Modification of CNTs with PEG is a promising method to increase the degree of distribution of nanotubes in the polymer matrix, which will significantly improve the properties of such nanocomposite materials.
Keywords: carbon nanotubes, noncovalent modification, nanocomposites, microstructure, interphase interaction
References:
-
1. Shoukat R., Khan M.I. Carbon nanotubes: a review on properties, synthesis methods and applications in micro and
nanotechnology. Microsyst. Technol. 2021. Vol. 27. P. 4183–4192. (https://doi.org/10.1007/s00542-021-05211-6).
2. Iqbal A., Saeed A., Ul-Hamid A. A review featuring the fundamentals and advancements of polymer/CNT
nanocomposite application in aerospace industry. Polym. Bull. 2021. Vol. 78. P. 539–557. (https://doi.org/10.1007/s00289-019-03096-0).
3. Baowan D., Ruengrot P., Hill J.M., Bacsa W. The effect of non-covalent functionalization on the interaction
energy of carbon nanotubes. J. Phys. Commun. 2019. Vol. 3. P. 035018. (https://doi.org/10.1088/2399-6528/ab0dd4).
4. Dubey R., Dutta D., Sarkar A., Chattopadhyay P. Functionalized carbon nanotubes: synthesis, properties and
applications in water purification, drug delivery, and material and biomedical sciences. Nanoscale Adv. 2021. Vol.
3. P. 5722–5744. (https://doi.org/10.1039/D1NA00293G).
5. Zhou Y., Fang Y., Ramasamy R.P. Non-Covalent Functionalization of Carbon Nanotubes for Electrochemical
Biosensor Development. Sensors. 2019. Vol. 19. P. 392. (https://doi.org/10.3390/s19020392).
6. Díez-Pascual A.M. Chemical Functionalization of Carbon Nanotubes with Polymers: A Brief Overview. Macromol.
2021. Vol. 1. P. 64–83. (https://doi.org/10.3390/macromol1020006).
7. Bilalis P., Katsigiannopoulos D., Avgeropoulos A., Sakellariou G. Non-covalent functionali¬zation of carbon
nanotubes with polymers. RSC Adv. 2014. Vol. 4. P. 2911. (https://doi.org/10.1039/C3RA44906H).
8. Lysenkov E., Melnyk I., Bulavin L., Klepko V., Lebovka N. Structure of Polyglycols Doped by Nanoparticles with
Anisotropic Shape. in L. Bulavin and N. Lebovka (eds.). Physics of Liquid Matter: Modern Problems. Springer
Proceedings in Physics. – Switzerland: Springer International Publishing. 2015. Р. 165-198. (https://doi.org/10.1007/978-3-319-20875-6_7).
9. Klepko V.V., Lysenkov E.A. Features of percolation transition in systems on the basis of oligoglycols and
carbon nanotubes. Ukr. J. Phys. 2015. Vol. 60(9). P. 944–949. (https://doi.org/10.15407/ujpe60.09.0944).
10. Hoshen J., Kopelman R. Percolation and cluster distribution. I. Cluster multiple labeling technique and
critical concentration algorithm. Physical Review B: Condensed Matter and Materials Physics. 1976. Vol. 14. P.
3438–3445. (https://doi.org/10.1103/PhysRevB.14.3438).
11. Boehm H.P. Surface oxides on carbon and their analysis: a critical assessment. Carbon. 2002. Vol. 40(2). P.
145–149. (https://doi.org/10.1016/S0008-6223(01)00165-8).
12. Petrova B., Tsyntsarski B., Budinova T., Petrov N., Velasco L.F., Ania C.O. Activated carbon from coal tar
pitch and furfural for the removal of p-nitrophenol and m-aminophenol. Chem. Eng. J. 2011. Vol. 172(1). P.
102–108. (https://doi.org/10.1016/j.cej.2011.05.075).
13. Lin Y., Taylor S., Li H., Fernando K.A.S., Qu L., Wang W., Gu L., Zhou B., Sun Y.-P. Advances toward
bioapplications of carbon nanotubes. J. Mater. Chem. 2004. Vol. 14. Р. 527–541. (https://doi.org/10.1039/B314481J).
14. Islam M.F., Rojas E., Bergey D.M., Johnson A.T., Yodh A.G. High weight fraction surfactant solubilization of
single-wall carbon nanotubes in water. Nano Lett. 2003. Vol. 3. P. 269–273. (https://doi.org/10.1021/nl025924u).
15. Shim M., Wong N., Kam S., Chen R.J., Li Y., Dai H. Functionalization of carbon nanotubes for biocompatibility
and biomolecular recognition. Nano Lett. 2002. Vol. 2. P. 285–288. (https://doi.org/10.1021/nl015692j).
16. Lysenkov E.A., Klepko V.V., Yakovlev Yu.V. Influence of the Filler’s Size on the Percolation Behavior in the
Polyethylene Glycol/Carbon Nanotubes System. J. Nano- Electron. Phys. 2015. Vol. 7(1). P. 01031.
17. Feder J. Fractals. – Springer: Science & Business Media. 2013. 284 p.
18. Lysenkov E.A., Klepko V.V. Features of the microstructure of systems based on polyethers and carbon nanotubes.
Nanosystems, nanomaterials, nanotechnologies. 2016. Vol. 14(2). P. 203–219. (in Ukrainian).
How to Cite
Lysenkov E., Hylko M., Bila V. INFLUENCE OF NONCOVALENT MODIFICATION OF CARBON NANOTUBES BY POLYETHYLENE GLYCOL ON THEIR DISTRIBUTION IN THE POLYMER MATRIX. Proc. Shevchenko Sci. Soc. Chem. Sci. 2022 Vol. LXX. P. 16-25.