Biodegradable Ferroelectric Molecular Plastic Crystal HOCH 2 (CF 2 ) 7 CH 2 OH Structurally Inspired by Polyvinylidene Fluoride

作者：Yong Ai, Zhuxiao Gu, Peng Wang, Yuan‐Yuan Tang, Xiao‐Gang Chen, Hui‐Peng Lv, Peng‐Fei Li, Qing Jiang, Ren‐Gen Xiong, Jun‐Jie Zhang, Han‐Yue Zhang · 发表于：Advanced Materials · 年份：2024 · DOI：10.1002/adma.202405981 · 被引用次数：19 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Acoustic Wave Resonator Technologies、Silicone and Siloxane Chemistry

Abstract Ferroelectric materials, traditionally comprising inorganic ceramics and polymers, are commonly used in medical implantable devices. However, their nondegradable nature often necessitates secondary surgeries for removal. In contrast, ferroelectric molecular crystals have the advantages of easy solution processing, lightweight, and good biocompatibility, which are promising candidates for transient (short‐term) implantable devices. Despite these benefits, the discovered biodegradable ferroelectric materials remain limited due to the absence of efficient design strategies. Here, inspired by the polar structure of polyvinylidene fluoride (PVDF), a ferroelectric molecular crystal 1H,1H,9H,9H‐perfluoro‐1,9‐nonanediol (PFND), which undergoes a cubic‐to‐monoclinic ferroelectric plastic phase transition at 339 K, is discovered. This transition is facilitated by a 2D hydrogen bond network formed through O−H···O interactions among the oriented PFND molecules, which is crucial for the manifestation of ferroelectric properties. In this sense, by reducing the number of −CF 2 − groups from ≈5 000 in PVDF to seven in PFND, it is demonstrated that this ferroelectric compound only needs simple solution processing while maintaining excellent biosafety, biocompatibility, and biodegradability. This work illuminates the path toward the development of new biodegradable ferroelectric molecular crystals, offering promising avenues for biomedical applications.