Tohluebaji Nikruesong, Putson Chatchai, Muensit Nantakan, Yuennan Jureeporn
Faculty of Science and Technology, Princess of Naradhiwas University, Narathiwat 96000, Thailand.
Center of Excellence in Nanotechnology for Energy (CENE), Division of Physical Science (Physics), Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand.
Polymers (Basel). 2021 Sep 24;13(19):3250. doi: 10.3390/polym13193250.
Previous studies have reported that poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) copolymers can exhibit large electrostrictive strains depending on the filler. This work examines the electrostrictive and structural properties of P(VDF-HFP) nanofibers modified with conductive polymer polyaniline (PANI). The P(VDF-HFP)/PANI composite nanofibers were prepared by an electrospinning method with different PANI concentrations (0, 0.5, 1, 1.5, 3 and 5 wt.%). The average diameter, water contact angle and element were analyzed by SEM, WCA and EDX, respectively. The crystalline, phase structure and mechanical properties were investigated by XRD, FTIR and DMA, respectively. The dielectric properties and electrostrictive behavior were also studied. The results demonstrated that the composite nanofibers exhibited uniform fibers without any bead formation, and the WCA decreased with increasing amount of PANI. However, a high dielectric constant and electromechanical response were obtained. The electrostrictive coefficient, crystalline, phase structure, dielectric properties and interfacial charge distributions increased in relation to the PANI content. Moreover, this study indicates that P(VDF-HFP)/PANI composite nanofibers may represent a promising route for obtaining electrostrictive composite nanofibers for actuation applications, microelectromechanical systems and sensors based on electrostrictive phenomena.
先前的研究报道，聚偏氟乙烯-六氟丙烯（P(VDF-HFP)）共聚物根据填料的不同可表现出较大的电致伸缩应变。本工作研究了用导电聚合物聚苯胺（PANI）改性的P(VDF-HFP)纳米纤维的电致伸缩和结构性能。通过静电纺丝法制备了不同PANI浓度（0、0.5、1、1.5、3和5 wt.%）的P(VDF-HFP)/PANI复合纳米纤维。分别通过扫描电子显微镜（SEM）、水接触角测量仪（WCA）和能谱仪（EDX）分析了平均直径、水接触角和元素。分别通过X射线衍射仪（XRD）、傅里叶变换红外光谱仪（FTIR）和动态热机械分析仪（DMA）研究了结晶、相结构和力学性能。还研究了介电性能和电致伸缩行为。结果表明，复合纳米纤维呈现出均匀的纤维，没有任何珠粒形成，且水接触角随PANI含量的增加而降低。然而，获得了高介电常数和机电响应。电致伸缩系数、结晶、相结构、介电性能和界面电荷分布随PANI含量的增加而增加。此外，本研究表明，P(VDF-HFP)/PANI复合纳米纤维可能是获得用于驱动应用、微机电系统和基于电致伸缩现象的传感器的电致伸缩复合纳米纤维的一条有前途的途径。
