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Functional Nanostructured Materials (including low-D carbon)
High Dielectric Constant and Low Dielectric Loss via Poly (vinyl alcohol)/Ti3C2Tx MXene Nanocomposite Seyyed Alireza Mirkhani, Ali Shayesteh Zeraati, Ehsan Aliabadian, Michael Naguib, and Uttandaraman Sundararaj ACS Appl. Mater. Interfaces, Just Accepted Manuscript • DOI: 10.1021/acsami.9b00393 • Publication Date (Web): 26 Apr 2019 Downloaded from http://pubs.acs.org on April 26, 2019
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ACS Applied Materials & Interfaces
High Dielectric Constant and Low Dielectric Loss via Poly (vinyl alcohol)/Ti3C2Tx MXene Nanocomposite Seyyed Alireza Mirkhani , Ali Shayesteh Zeraati , Ehsan Aliabadian‡, Michael Naguib†, Uttandaraman Sundararaj‡* ‡Department
of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, Canada T2N 1N4 †Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, United States *Corresponding Author’s Email:
[email protected] &These authors contributed equally to this work.
Abstract. As a new class of 2D materials, MXene family has triggered attention because of their unique electrical and mechanical properties. MXene’s excellent electrical conductivity and hydrophilicity, make it an ideal option for polymer nanocomposite fabrication. For the first time, polymer nanocomposites of polyvinyl alcohol (PVA)/Ti3C2Tx (MXene) were used for charge storage applications in the X-band frequency range (8.2-12.4 GHz). By implementing solution casting and vacuum assisted filtration (VAF), flexible thin-films with exceptional dielectric properties (solution casting @10.0 wt% MXene: MXene:
= 3166 ,
= 370.5 ,
= 0.11 and VAF @10.0 wt%
= 0.09) were fabricated. The reported dielectric constants in this study
are among the highest values obtained in X-band frequency with low dielectric losses. This outstanding performance originates from the high electrical conductivity of synthesized Ti3C2Tx MXene (
1.4 ± 0.077 × 106
; highest reported value for Ti3C2Tx MXene to date in the
literature), great dispersion state and the nacre-like structure of the polymer nanocomposites. Combining the exceptional properties of MXene with the effective nacre-like structure, PVA/MXene nanocomposites can be used as a novel charge storage material fulfilling the requirements of flexible electronics and energy storage devices. Keywords: MXene, polymer nanocomposite, dielectric properties, rheology, poly(vinyl alcohol), high-k polymer nanocomposite
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1. Introduction Polymeric materials with high dielectric constant and low dielectric loss, are a promising option for advanced dielectric applications since they can be easily molded into versatile configurations with reduced volume and weight
1-6.
The main hurdle of the application of pure
polymers in dielectrics is their very low inherent dielectric constant (k
