Yuennan Jureeporn, Muensit Nantakan, Tohluebaji Nikruesong, Chailad Wichain, Yang Liu, Sukhawipat Nathapong, Ashraf Ghulam Abbas, Channuie Phongpichit
Surface Technology Research Unit (STRU), Faculty of Science and Technology, Nakhon Si Thammarat Rajabhat University, Nakhon Si Thammarat, 80280, Thailand.
Division of Physical Science (Physics), Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand.
Sci Rep. 2025 May 22;15(1):17810. doi: 10.1038/s41598-025-02895-y.
This study investigates the impact of iron (III) chloride hexahydrate (FeCl·6HO) incorporation on the structural, thermal, and dielectric properties of poly(vinylidene fluoride-co-hexafluoropropylene) [P(VDF-HFP)] nanocomposites, which were prepared using a solution casting method with varying filler concentrations (1-4 wt%). Scanning electron microscopy revealed a systematic increase in porosity-from 0.72% in pure P(VDF-HFP) to 27.5% at 4 wt% FeCl·6HO-along with increased pore size and surface heterogeneity. Atomic force microscopy confirmed enhanced surface roughness correlating with increased filler content. Fourier-transform infrared spectroscopy demonstrated a significant α-to-β phase transformation, indicating the formation of the polar β-phase with increasing FeCl·6HO content. X-ray diffraction analysis corroborated these findings, revealing a notable increase in crystallinity and β-phase content, with 4 wt% FeCl·6HO achieving the highest β-phase fraction (88.99%). Thermogravimetric analysis confirmed thermal stability up to approximately 500 °C, with a gradual shift in degradation onset attributed to FeCl·6HO interactions. Dielectric measurements at 10 Hz showed a remarkable enhancement in dielectric constant-from 5.62 in pure P(VDF-HFP) to 19.16 at 4 wt% FeCl·6HO-while maintaining a low dielectric loss (< 0.30). These improvements are attributed to the synergistic effects of FeCl·6HO on porosity, phase transformation, crystallinity, thermal stability, and dielectric properties. The superior performance of these nanocomposites makes them promising candidates for flexible electronics, energy storage systems, and advanced sensors.
本研究考察了六水合氯化铁（FeCl₃·6H₂O）的掺入对聚（偏二氟乙烯 - 共 - 六氟丙烯）[P（VDF - HFP）]纳米复合材料结构、热性能和介电性能的影响，这些纳米复合材料采用溶液浇铸法制备，填料浓度不同（1 - 4 wt%）。扫描电子显微镜显示孔隙率有系统性增加——从纯P（VDF - HFP）中的0.72%增加到4 wt% FeCl₃·6H₂O时的27.5%——同时孔径和表面不均匀性增加。原子力显微镜证实表面粗糙度增加与填料含量增加相关。傅里叶变换红外光谱表明有显著的α相向β相转变，表明随着FeCl₃·6H₂O含量增加形成了极性β相。X射线衍射分析证实了这些发现，显示结晶度和β相含量显著增加，4 wt% FeCl₃·6H₂O达到最高β相分数（88.99%）。热重分析证实热稳定性高达约500℃，降解起始温度的逐渐变化归因于FeCl₃·6H₂O的相互作用。10 Hz下的介电测量显示介电常数显著提高——从纯P（VDF - HFP）中的5.62增加到4 wt% FeCl₃·6H₂O时的19.16——同时保持低介电损耗（< 0.30）。这些改进归因于FeCl₃·6H₂O对孔隙率、相变、结晶度、热稳定性和介电性能的协同作用。这些纳米复合材料的优异性能使其成为柔性电子器件、能量存储系统和先进传感器的有前景的候选材料。
