POS4-0498
Selective PVA Adsorption for Tuning the Stacked Structure and Rheological Properties of MXene/GO Dispersions
Topic
S4. Colloids, Interfaces, and Molecular Assemblies for Functional Soft Materials
When and Where
Sep 29, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Hae Jung SON
Boseok KANG
Presenter(s)
Eunho Cho (Seoul National University)
Co-Author(s)
Abstract
MXene (Ti₃C₂Tₓ) is a two-dimensional material widely used in various applications, including electromagnetic interference (EMI) shielding, owing to its excellent electrical properties. However, its practical use is limited by its low chemical stability, strong tendency to restack, and vulnerability to oxidation in aqueous environments. To address these challenges, hybridization with graphene oxide (GO) has been actively explored as a strategy to improve the dispersion stability and mechanical properties of MXene-based composites.
In this study, we investigated how polymer adsorption affects particle dispersion and stacked-structure formation in MXene/GO composite systems. Specifically, poly(vinyl alcohol) (PVA) was adsorbed onto either MXene or GO surfaces to modify the interfacial characteristics of the particles. Under identical compositional conditions, we compared how the dispersion stability and assembled structure changed depending on whether PVA was adsorbed onto MXene or GO. The resulting stacked structures were characterized using polarized optical microscopy, X-ray diffraction, and small-angle X-ray scattering, while their structure-dependent rheological properties were also examined.
As a result, we confirmed that different stacked structures were formed in composite systems even with the same composition, depending on whether PVA was adsorbed onto MXene or GO. These findings reveal the key role of polymer-mediated interfacial interactions in controlling the stacked structure of MXene/GO composites. Therefore, this approach provides a useful strategy for tailoring the structure of MXene/GO composites and broadening their potential applications.
In this study, we investigated how polymer adsorption affects particle dispersion and stacked-structure formation in MXene/GO composite systems. Specifically, poly(vinyl alcohol) (PVA) was adsorbed onto either MXene or GO surfaces to modify the interfacial characteristics of the particles. Under identical compositional conditions, we compared how the dispersion stability and assembled structure changed depending on whether PVA was adsorbed onto MXene or GO. The resulting stacked structures were characterized using polarized optical microscopy, X-ray diffraction, and small-angle X-ray scattering, while their structure-dependent rheological properties were also examined.
As a result, we confirmed that different stacked structures were formed in composite systems even with the same composition, depending on whether PVA was adsorbed onto MXene or GO. These findings reveal the key role of polymer-mediated interfacial interactions in controlling the stacked structure of MXene/GO composites. Therefore, this approach provides a useful strategy for tailoring the structure of MXene/GO composites and broadening their potential applications.
