Affiliation: | 1. Micro and Nano Materials Laboratory, Department of Chemistry, Faculty of Engineering & Technology (ITER), Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
Contribution: ?Investigation (equal), Writing - original draft (lead), Writing - review & editing (equal);2. Department of Physics, Faculty of Engineering & Technology (ITER), Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
Contribution: Formal analysis (equal), Resources (equal), Writing - review & editing (equal);3. Central Institute of Technology, Kokrajhar (Deemed to be University, MHRD, Govt. of India) BTAD, Kokrajhar, Assam, India
Contribution: Data curation (equal), Formal analysis (equal), Validation (equal), Writing - review & editing (equal);4. Micro and Nano Materials Laboratory, Department of Chemistry, Faculty of Engineering & Technology (ITER), Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India |
Abstract: | Light-weight and flexible 2D MXene-based polymer materials with low dielectric loss and high dielectric constant have drawn great attention in the power systems and modern electronic field. A series of Ti3C2Tx/EMA composites were fabricated via simple solution casting followed by a compression molding method with various mass concentrations of Ti3C2Tx (0, 1, 3, 5, 8, 10, 12, and 15 wt%). Morphological and micro structural properties of the prepared composites were studied via X-ray diffraction (XRD) and field-emission scanning electron microscope (FESEM), where the distribution of Ti3C2Tx in the Ti3C2Tx/EMA composites was confirmed. Thermal behaviors were analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) investigations. The DSC analysis reveals that the % of crystallinity decreases from 11.06 with 1 wt% to 5.68 with 15 wt%, where Ti3C2Tx acts as an efficient nucleating agent. TGA data confirm the enhancement of the thermal stability of the composites upon increasing in Ti3C2Tx loading. The room temperature electrical and dielectric behavior of the studied composites were examined in the frequency range of 100 Hz–5 MHz. In this work, the 10 wt% of Ti3C2Tx loaded poly (ethylene-co-methyl acrylate) composite (EMA) showed higher dielectric permittivity (ε′ = 124.22) with lower dissipation loss (tan δ = 0.051) at 100 Hz among all weight percentages. The behavior of charge carriers in the prepared composites was studied by utilizing the impedance spectroscopy technique. The electrical parameters were calculated from the fitted Nyquist plots with a corresponding circuit model. I–V curves confirmed the conduction mechanisms of the composites. This beneficial enhancement in electrical properties recommends the composite can be utilized in flexible electronic storage devices. |