机械容积
材料科学
纳米纤维
静电纺丝
化学工程
纳米技术
复合材料
荧光粉
光电子学
聚合物
工程类
作者
Zhongxiang Wang,Youyi Tai,Zuyang Ye,Jin Nam,Yadong Yin
标识
DOI:10.1002/adfm.202410358
摘要
Abstract Incorporating mechanoluminescent (ML) materials into piezoelectric polymer nanofibers enables the development of advanced pressure sensors and human–machine interactive devices by providing mechanical flexibility and enhancing processibility. This study demonstrates that introducing water during the electrospinning process significantly improves the piezoelectric properties of polyvinylidene fluoride (PVDF)‐based polymers, attributed to the enhanced formation of piezoelectrically active β ‐phases. A biphasic relationship between piezoelectricity and water concentration is revealed, with an optimal water concentration of 4 wt.% for both polyvinylidene fluoride‐hexafluoropropylene (PVDF‐HFP) and polyvinylidene fluoride‐trifluoroethylene (PVDF‐TrFE). Furthermore, the inclusion of water in the electrospinning solution facilitates the integration of ZnS: Mn 2+ mechanoluminescent microparticles into the polymer fibers, resulting in fibrous composite membranes with significantly enhanced mechano‐optical responses. After thermal annealing, the fibrous membrane by electrospinning PVDF‐TrFE and ZnS: Mn 2+ microparticles with 8 wt.% water addition demonstrates the best ML performance with high light emission intensity and reduced pressure threshold down to 18 kPa. This exceptional performance can be attributed to the local electric field generated by the encapsulation of microparticles within the PVDF‐TrFE fibers, which facilitates electroluminescence and subsequently boosts the overall light emission.
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