Preparation of Polymer-based Nanocomposites Using Surface Modified MXene 2-D Fillers and Their Percolation Threshold and Dielectric Response
TONG Yang1,2, WU Xinyu1, LIU Yang1, LIU Jiachen1,2,*, JU Shaoshuai1, Li Jungang1, Li Yuting1, HU Jifan1,*
1 School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China 2 Shanxi Provincial Key Laboratory of Magnetic and Electric Functional Materials and the Applications, Taiyuan University of Science and Technology, Taiyuan 030024, China
Abstract: A nanocomposite with high dielectric constant based onP(VDF-TrFE) copolymer matrix was fabricated in the present work by using conductive two-dimensional (2-D) titanium carbide (Ti3C2) MXene with surface modification as filler. The produced dielectric nanocomposites were flexible and exhibited a dense and uniform microstructure. With a small amount of fillers, the extremely large specific surface area and high surface activity of the filler promoted an increase in nucleation density and crystallization rate, leading to a high crystallinity of 87.7% for the nanocomposites with a filler content of 1.5wt%. It was identified that the percolation threshold of Ti3C2 in P(VDF-TrFE) was dependent on the frequency of electric field, exhibiting a percolation threshold of 11.9wt% under a 100 Hz alternating electric field, significantly lower than that of composites using spherical conductor fillers reported previously. With a filler content of 10wt%, the nanocomposites exhibited high dielectric constant of ＞3 100 at 100 Hz associated with a loss of 0.8 far lower than other reported high-dielectric constant composites in relevant publications at the same frequency. The results of this work implicate 2-D MXenes as promising candidate for fabrication of foldable/wearable capacitors, sensors, and energy storage devices.
同阳, 武鑫雨, 刘洋, 刘嘉辰, 琚绍帅, 李俊钢, 李雨婷, 胡季帆. 基于表面改性MXene二维填料的铁电聚合物纳米复合材料电介质制备及其逾渗阈值/介电响应研究[J]. 材料导报, 2025, 39(13): 25010199-7.
TONG Yang, WU Xinyu, LIU Yang, LIU Jiachen, JU Shaoshuai, Li Jungang, Li Yuting, HU Jifan. Preparation of Polymer-based Nanocomposites Using Surface Modified MXene 2-D Fillers and Their Percolation Threshold and Dielectric Response. Materials Reports, 2025, 39(13): 25010199-7.
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2025, Vol. 39 
