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- Title
Relaxation‐Induced Significant Room‐Temperature Dielectric Pulsing Effects.
- Authors
Li, Zhenzhen; Gong, Yutie; Xu, Aihua; Zhao, Jiayu; Li, Qiong; Dong, Lijie; Xiong, Chuanxi; Jiang, Ming
- Abstract
Thermo‐responsive dielectric materials are in urgent demand owing to the rapid development of smart electronic/electrical systems. Although different types and structures of thermally responsive dielectric materials have been continuously reported, their dielectric response behaviors all originate from thermodynamic phase transitions. Herein, it is demonstrated that structural relaxation in poly(vinylidene fluoride) (PVDF), a non‐thermodynamic phase transition, can induce a significant thermal dielectric pulse at room temperature. The dielectric pulse strength of up to 6.3 × 105 at 20 Hz, with a dielectric pulsing temperature of 24 °C, is achieved from polyethylene glycol (PEG)‐PVDF coaxial nanofibrous films (PVDF@PEG), fabricated via a continuous blow spinning method. Moreover, the films exhibit excellent flexibility, adjustable strength and toughness, switchable hydrophilicity/hydrophobicity, and effective thermal management capability. The relaxation‐induced dielectric pulsing effect, outstanding multifunctionality, and simple preparation combine to promote further scalability and prospects of PVDF@PEG. In particular, the work contributes to the discovery of the relaxation‐induced dielectric response mechanism, which provides a new strategy for the generation of thermo‐responsive dielectric materials.
- Subjects
DIELECTRIC materials; DIELECTRICS; DIELECTRIC strength; PHASE transitions; DIFLUOROETHYLENE; SMART materials; THERMORESPONSIVE polymers
- Publication
Advanced Functional Materials, 2023, Vol 33, Issue 40, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202301009