Correlation of annealing temperature, morphology, and electro-mechanical properties of electrospun piezoelectric nanofibers

POLYMER

卷:127

Article

Baniasadi, Mahmoud^1,5  Xu, Zhe¹  Cai, Jizhe²  Daryadel, Soheil¹  Quevedo-Lopez, Manuel³  Naraghi, Mohammad²  Minary-Jolandan, Majid^1,4 

[1] Univ Texas Dallas, Dept Mech Engn, Richardson, TX 75080 USA

[2] Texas A&M Univ, Dept Aerosp Engn, 3141 TAMU, College Stn, TX 77843 USA

[3] Univ Texas Dallas, Dept Mat Sci & Engn, Richardson, TX 75080 USA

[4] Univ Texas Dallas, Alan G MacDiarmid NanoTech Inst, Richardson, TX 75080 USA

[5] Georgia Southern Univ, Dept Mfg Engn, Statesboro, GA 30460 USA

关键词: P(VDF-TrFE);    Multifunctional polymer;    Electrospun nanofiber;    Electrospinning;    Annealing;    Crystallization;    Piezoelectric polymer;    Degree of crystallinity;    Nanoindentation;   

DOI  :  10.1016/j.polymer.2017.08.053

来源: Elsevier

【 摘 要 】

Piezoelectric polymeric nanofibers, such as P(VDF-TrFE), are promising nanostructures for sensing/actuation applications where flexibility of the component is required, for example soft robotics, conformal sensors, and energy harvesting devices. A challenge in polymeric piezoelectric materials is that their electromechanical coupling efficiency must be improved to approach that of bulk piezo ceramics. The electromechanical coupling factor is proportional to Yd(2) (where Y is the elastic modulus, and d is the piezoelectric constant); therefore, the investigation of inter-dependence of these properties as function of thermal annealing is important. Although effect of thermal annealing on thin film of PVDF has been studied, however, detailed investigations of correlation of annealing temperature, morphology, and electro-mechanical properties of electrospun piezoelectric nanofibers have not been reported, in particular at single nanofiber level. We report on the effect of various annealing temperatures on mechanical and piezoelectric properties at the single nanofiber level using nanoindentation and piezoresponse force microscopy (PFM). FTIR, XRD, and WAXD spectroscopies were also employed to quantitatively and qualitatively explain the enhancement of these properties. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

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