Modified pvdf nanofiber piezoelectric sensing film and preparation method and application thereof
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANJING TECH UNIV
- Filing Date
- 2026-03-25
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional fiber-reinforced polymer composites (FRPs) suffer from poor impact resistance and low damage tolerance in damage detection. Furthermore, existing embedded sensors may compromise structural integrity or require external power, making it difficult to achieve real-time and accurate damage monitoring.
A modified PVDF nanofiber piezoelectric sensing membrane was prepared by using a composite spinning solution modified with hydroxylated barium titanate and multi-walled carbon nanotubes. The membrane was then prepared by electrospinning and hot-pressed with glass fiber prepreg to form a self-powered embedded sensing unit. Damage monitoring was achieved by combining this unit with electrical impedance tomography (EIT) technology.
It enables real-time, in-situ, and visualized damage monitoring of FRP structures, improves sensing sensitivity and signal accuracy, has self-powered characteristics, does not weaken the structural mechanical properties, and is suitable for aerospace, automotive, and marine engineering.
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