Enhance the Pyroelectricity of Polyvinylidene Fluoride by Graphene-Oxide Doping

Hu, Yuh-Chung; Hsu, Wei-Li; Wang, Yi-Ta; Ho, Cheng-Tao; Chang, Pei‐Zen

doi:10.3390/s140406877

Cited by 58 publications

(29 citation statements)

References 19 publications

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“…To further improve the piezoelectric output various nanofillers such as clay , carbon nanotube , graphene , ZnO , BaTiO 3 , and PZT have been added to PVDF. These nanofillers either enhance the piezoelectric output or improve the β‐phase content of PVDF.…”

Section: Introductionmentioning

confidence: 99%

Durable, efficient, and flexible piezoelectric nanogenerator from electrospun PANi/HNT/PVDF blend nanocomposite

2018

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Currently, there is considerable research focus on portable, lightweight, shock‐resistant, and inexpensive wearable devices that are ideally powered by harvesting abundant mechanical or vibration energy, making battery or related wiring superfluous. In this study, piezoelectric nanogenerator was electrospun from PANi (polyaniline)/HNT (halloysite nanotube)/PVDF (poly[vinylidene fluoride]) blend nanocomposite. Polymorphism, crystallinity and morphology of the nanogenerator were explored in detail. HNT and PANi acted as a nucleating agent and conductive filler, respectively in PVDF; their synergism helps improve the piezoelectric performance of PVDF. The piezoelectric performance of the nanogenerator patch was studied under various external mechanical stresses, such as pressure, tapping, and impact. A maximum voltage output of approximately 7.2 V was generated by the nanogenerator under impact. The nanogenerator patch attached to human arm exhibited not only excellent piezoelectric response during arm movements, but, also proved to be flexible, highly sensitive and durable. This nanogenerator could possibly be used in wearable piezoelectric energy conversion application for self‐powered devices. POLYM. COMPOS., 40:1663–1675, 2019. © 2018 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Durable, efficient, and flexible piezoelectric nanogenerator from electrospun PANi/HNT/PVDF blend nanocomposite

2018

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“…Yang et al [14] obtained similar results for nylon-6/poly(vinylidene fluoride) (PVDF) blends. Moreover, graphene oxide has also revealed a good nucleating ability towards several semi-crystalline polymers, including for instance isotactic polypropylene (iPP) [29][30][31], PVDF [32][33][34], PCL [35], and the two polymers object of the present study, PLLA and PBS [36,37]. As such, in the current work the dual role of GO added in low amounts to PLLA/PBS blend is investigated.…”

Section: Introductionmentioning

confidence: 99%

Correlating the morphology of poly(L-lactide)/poly(butylene succinate)/graphene oxide blends nanocomposites with their crystallization behavior

Fenni¹,

Monticelli²,

Conzatti³

et al. 2018

Express Polym. Lett.

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Abstract. Bio-based blend nanocomposites of poly(L-lactic acid) (PLLA) and poly(butylene succinate) (PBS), with different concentrations (from 0.1 to 0.5 wt%) of graphene oxide (GO), are prepared via solution dispersion of PBS/GO followed by melt blending with PLLA in a 70/30 PLLA/PBS weight ratio. Scanning and Transmission Electron Microscopy reveals micron-sized droplets of PBS in the PLLA matrix with the GO nanofiller preferentially found in the PBS phase. The GO acts as nucleating agent for both semicrystalline polymers. The nanofiller nucleating effect is compared to the one of own selfnuclei for each polymer, to define a convenient nucleating efficiency (NE) scale. A value of around 80% is determined for GO towards PBS, among the highest NEs ever reported for this polymer. On the other hand, the efficiency in nucleating PLLA is equal to a modest 15%, also due to the uneven distribution of the nanofiller in the two polymers. A close relationship between the nanocomposite morphology and crystallization behavior of the two different polymers is thus established.

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“…Recently, studies have shown that mechanical and thermal properties of PVDF are improved by the addition of G [19,29,37,38]. …”

Section: Methodsmentioning

confidence: 99%

A Capacitive Humidity Sensor Based on an Electrospun PVDF/Graphene Membrane

Hernández-Rivera

Rodríguez-Roldán

Mora-Martínez

et al. 2017

Sensors

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Humidity sensors have been widely used in areas such as agriculture, environmental conservation, medicine, instrumentation and climatology. Hydrophobicity is one of the important factors in capacitive humidity sensors: recent research has shown that the inclusion of graphene (G) in polyvinylidene fluoride (PVDF) improves its hydrophobicity. In this context, a methodology to fabricate electrospun membranes of PVDF blended with G was developed in order to improve the PVDF properties allowing the use of PVDF/G membrane as a capacitive humidity sensor. Micrographs of membranes were obtained by scanning electron microscopy to analyze the morphology of the fabricated samples. Subsequently, the capacitive response of the membrane, which showed an almost linear and directly proportional response to humidity, was tested. Results showed that the response time of PVDF/G membrane was faster than that of a commercial DHT11 sensor. In summary, PVDF/G membranes exhibit interesting properties as humidity sensors.

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Enhance the Pyroelectricity of Polyvinylidene Fluoride by Graphene-Oxide Doping

Cited by 58 publications

References 19 publications

Durable, efficient, and flexible piezoelectric nanogenerator from electrospun PANi/HNT/PVDF blend nanocomposite

Durable, efficient, and flexible piezoelectric nanogenerator from electrospun PANi/HNT/PVDF blend nanocomposite

Correlating the morphology of poly(L-lactide)/poly(butylene succinate)/graphene oxide blends nanocomposites with their crystallization behavior

A Capacitive Humidity Sensor Based on an Electrospun PVDF/Graphene Membrane

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