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首页> 外文期刊>RSC Advances >Outstanding dielectric constant and piezoelectric coefficient in electrospun nanofiber mats of PVDF containing silver decorated multiwall carbon nanotubes: assessing through piezoresponse force microscopy
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Outstanding dielectric constant and piezoelectric coefficient in electrospun nanofiber mats of PVDF containing silver decorated multiwall carbon nanotubes: assessing through piezoresponse force microscopy

机译：含银装饰多壁碳纳米管的PVDF电纺纳米纤维垫中的突出介电常数和压电系数：通过压电响应力显微镜评估

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摘要

In order to enhance the piezoelectric b-phase, PVDF was electrospun from DMF solution. The enhanced b-phase was discerned by comparing the electrospun fibers against the melt mixed samples. While both the processes resulted in phase transformation of a-to electroactive b-polymorph in PVDF, the fraction of b-phase was strongly dependent on the adopted process. Two different nanoscopic particles: carboxyl functionalized multiwall carbon nanotubes (CNTs) and silver (Ag) decorated CNTs were used to further enhance the piezoelectric coefficient in the electrospun fibers. Fourier transform infrared spectroscopy (FTIR) and wide-angle X-ray diffraction (XRD) supports the development of piezoelectric b-phase in PVDF. It was concluded that electrospinning was the best technique for inducing the b-polymorph in PVDF. This was attributed to the high voltage electrostatic field that generates extensional forces on the polymer chains that aligns the dipoles in one direction. The ferroelectric and piezoelectric measurement on electrospun fibers were studied using piezo-response force microscope (PFM). The Ag-CNTs filled PVDF electrospun fibers showed the highest piezoelectric coefficient (d(33) = 54 pm V-1) in contrast to PVDF/CNT fibers (35 pm V-1) and neat PVDF (30 pm V-1). This study demonstrates that the piezoelectric coefficient can be enhanced significantly by electrospinning PVDF containing Ag decorated nanoparticles.
机译：为了增强压电B相，PVDF从DMF溶液中肌纺。通过将电纺纤维与熔融混合样品进行比较来辨别增强的B相。虽然这两个方法导致PVDF中A-to电活性B-多晶型物的相变，但B相的级分强烈取决于所采用的方法。两种不同的纳米镜颗粒：羧基官能化多壁碳纳米管（CNT）和银（Ag）装饰CNT以进一步提高电纺纤维中的压电系数。傅里叶变换红外光谱（FTIR）和广角X射线衍射（XRD）支持PVDF中压电B相的开发。得出结论，静电纺丝是诱导PVDF中B-多晶型物的最佳技术。这归因于高压静电场，其在聚合物链上产生延伸力，该扩展力在一个方向上对准偶极子。使用压电响应力显微镜（PFM）研究了电纺丝纤维上的铁电和压电测量。与PVDF / CNT纤维（35μmV-1）和整齐的PVDF（30PM V-1）表示，AG-CNT填充的PVDF电纺纤维显示出最高压电系数（D（33）= 54mPV-1），并齐全的PVDF（30mPV-1）。本研究表明，通过含有Ag装饰纳米颗粒的静电纺丝PVDF可以显着提高压电系数。

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  • 来源
    《RSC Advances》 |2016年第8期|共8页
  • 作者

    Sharma Maya; Srinivas Vijay; Madras Giridhar; Bose Suryasarathi;

  • 作者单位

    Indian Inst Sci Ctr Nano Sci &

    Engn Bangalore 560012 Karnataka India;

    Indian Inst Sci Dept Mat Engn Bangalore 560012 Karnataka India;

    Indian Inst Sci Dept Chem Engn Bangalore 560012 Karnataka India;

    Indian Inst Sci Dept Mat Engn Bangalore 560012 Karnataka India;

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  • 正文语种 eng
  • 中图分类 化学;
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