Fluorine substitution in hydrogen-bonded organic frameworks for triboelectric sensing: structure-property relationship and mechanistic understanding

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2026-07-09 DOI:10.1007/s40843-026-4133-3

Sai Yan (, ), Han Zhang (, ), Yue Zhang (, ), Xiaohong Shang (, ), Peng Li (, ), Ran Cao (, ), Meifang Zhu (, )

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Abstract

Fluorination has been demonstrated as an effective strategy to enhance triboelectric output. However, a systematic investigation into the role of fluorine content and substitution effect remains lacking. In this study, by in-situ embedding fluorine-functionalized hydrogen-bonded organic frameworks (HOFs) into poly(vinylidene fluoride-hexa-fluoropropylene) (PVDF-HFP) nanofibers via electrospinning, we explored the fluorine content and substitution effect on tribo-sensor performance. Owing to the enhanced dielectric constant and surface charge polarization, the resulting PVDF-HFP/HOF nanofibers exhibited significantly improved triboelectric performance. Notably, tribo-sensors based on fluorine-functionalized HOF-doped nanofibers delivered a maximum open-circuit voltage of 210.7 V, far surpassing that of pristine PVDF-HFP (66.9 V). Theoretical simulations further revealed that this superior performance originates from the increased molecular dipole moments and local electrostatic potentials induced by fluorine substitution, with ortho-substitution offering stronger polarization than para-substitution. In addition, the gait monitoring experiment further demonstrated the application potential of PVDF-HFP/HOF nanofibers as a high-performance tribo-sensor. This work demonstrates a structure–property-guided approach to designing engineered fluorine-functionalized HOFs as tunable nanofillers, offering new insights into the development of high-performance triboelectric materials for next-generation electronics.

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用于摩擦电传感的氢键有机框架中的氟取代：结构-性能关系和机理理解

氟化已被证明是提高摩擦电输出的有效策略。然而，对氟含量和取代效应的作用还缺乏系统的研究。本研究通过静电纺丝将氟功能化的氢键有机框架（HOFs）原位嵌入聚偏氟乙烯-六氟丙烯（PVDF-HFP）纳米纤维中，探讨了氟含量和取代对摩擦传感器性能的影响。由于提高了介电常数和表面电荷极化，得到的PVDF-HFP/HOF纳米纤维的摩擦电性能得到了显著改善。值得注意的是，基于氟功能化hof掺杂纳米纤维的摩擦传感器提供了210.7 V的最大开路电压，远远超过了原始PVDF-HFP （66.9 V）。理论模拟进一步表明，这种优越的性能源于氟取代引起的分子偶极矩和局部静电势的增加，邻取代比对取代提供更强的极化。此外，步态监测实验进一步证明了PVDF-HFP/HOF纳米纤维作为高性能摩擦传感器的应用潜力。这项工作展示了一种结构-性能导向的方法来设计工程氟功能化的hof作为可调纳米填料，为下一代电子产品的高性能摩擦电材料的开发提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.