▌Hofmeister-regulated fabrication of piezoelectric β-PVDF membrane: The specific ion effect on the membrane formation, piezoelectric property, and anti-fouling performance
Hofmeister 效應調控壓電 β-PVDF 薄膜製備：特定離子效應對薄膜成形、壓電性能與抗污染性能之影響
R. D. H. T. Cayron, H. F. M. Austria, T. H. Huang, G. V. Carballo, S. Nayak, A. R. Caparanga, W. S. Hung*, K. R. Lee and J. Y. Lai
https://doi.org/10.1016/j.cej.2025.170223
SEED Member: W. S. Hung
Major Contributions
1. The Hofmeister series ion effect is systematically exploited to regulate β-phase crystallization in PVDF membranes, revealing how specific anions/cations in the casting solution modulate nucleation kinetics and β-PVDF content.
2. Optimized ion selection enhances piezoelectric output of the PVDF membrane, establishing a mechanistic understanding of ion-specific effects on piezoelectric property development during membrane fabrication.
3. The Hofmeister-regulated β-PVDF membranes demonstrate improved anti-fouling performance attributed to piezoelectric charge generation under hydraulic pressure, offering a scalable strategy for self-cleaning filtration membranes.
主要貢獻
1. 系統利用 Hofmeister 系列離子效應調控 PVDF 薄膜中 β 相結晶，揭示鑄膜液中特定陰/陽離子如何調節成核動力學與 β-PVDF 含量。
2. 優化離子選擇提升 PVDF 薄膜的壓電輸出，建立薄膜製備過程中離子特異性效應對壓電性能發展的機制認識。
3. Hofmeister 效應調控的 β-PVDF 薄膜展現改善的抗污染性能，歸因於水力壓力下的壓電電荷生成，為自清潔過濾薄膜提供可擴展策略。
