材料科学
压电
极化
聚偏氟乙烯
复合材料
压电系数
复合数
压电传感器
光电子学
电介质
铁电性
聚合物
作者
Md. Nurul Islam,Rifat Hasan Rupom,Pashupati R. Adhikari,Zoriana Demchuk,И. И. Попов,Alexei P. Sokolov,H. Felix Wu,Rigoberto C. Advíncula,Narendra B. Dahotre,Yijie Jiang,Wonbong Choi
标识
DOI:10.1002/adfm.202302946
摘要
Abstract Additively manufactured flexible and high‐performance piezoelectric devices are highly desirable for sensing and energy harvesting of 3D conformal structures. Herein, the study reports a significantly enhanced piezoelectricity in polyvinylidene fluoride (PVDF) achieved through the in situ dipole alignment of PVDF within PVDF‐2D molybdenum disulfide (2D MoS 2 ) composite by 3D printing. The shear stress‐induced dipole poling of PVDF and 2D MoS 2 alignment are harnessed during 3D printing to boost piezoelectricity without requiring a post‐poling process. The results show a remarkable, more than the eight‐fold increment in the piezoelectric coefficient ( d 33 ) for 3D printed PVDF‐8wt.% MoS 2 composite over cast neat PVDF. The underlying mechanism of piezoelectric property enhancement is attributed to the increased volume fraction of β phase in PVDF, filler fraction, heterogeneous strain distribution around PVDF‐MoS 2 interfaces, and strain transfer to the nanofillers as confirmed by microstructural analysis and finite element simulation. These results provide a promising route to design and fabricate high‐performance 3D piezoelectric devices via 3D printing for next‐generation sensors and mechanical–electronic conformal devices.
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