Interparticle interactions and rheological signatures of Ti3C2Tz MXene dispersions
Yükleniyor...
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
ACADEMIC PRESS INC ELSEVIER SCIENCE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Hypothesis: We hypothesize that dispersed Ti3C2Tz MXene particle interactions are reflected in the bulk
viscoelastic properties of the dispersions and can be analyzed using classical colloidal theory for anisotropic
particles. The relevant kinetic theory for Brownian anisotropic particles is given by the Doi and
Edwards (D-E) Model, and the Maxwell Model is used to fit the relaxation times as a function of frequency.
Such behavior is relevant to a variety of MXene processing techniques, particularly printing
and coating.
Experiments: Small oscillatory shear tests were performed for dilute Ti3C2Tz MXene aqueous dispersions
as a function of their concentration and temperature. Scanning electron microscopy (SEM), X-ray
Diffraction (XRD), Atomic Force Microscopy (AFM), f potential measurements, Dynamic Light
Scattering (DLS) were used to characterize the Ti3C2Tz MXene nanoparticles.
Findings: Ti3C2Tz dispersions show gel-like and viscous-like behavior at low and high temperatures,
respectively. Experimental relaxation times fitted to the Maxwell model are found to be close to the theoretical
values. However, at high temperatures, relaxation time values differ due to the inter-particle
interactions, even in the dilute concentration regime. For Ti3C2Tz dispersions, aggregation, and clustering
can have dramatic consequences for dispersion rheology, including gelation, as the sample transitions
from liquid-like to solid-like behavior.
Açıklama
Anahtar Kelimeler
MXene, Ti3C2Tz, Rheology, Nanosheets
Kaynak
Journal of Colloid and Interface Science
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
605
Sayı
Künye
Tezel, G. B., Arole, K., Holta, D. E., Radovic, M., & Green, M. J. (2022). Interparticle interactions and rheological signatures of Ti3C2Tz MXene dispersions. Journal of Colloid and Interface Science, 605, 120-128. doi:10.1016/j.jcis.2021.07.068
