System for Controlling the Moisture of the Soil Using Humidity Sensors from a Polyvinylidenefluoride Fiber Mats

González-Morán, C. O.; Pérez, Gabriel A. Zamora; Suaste-Gómez, Ernesto

doi:10.1166/asl.2013.4869

Cited by 8 publications

(9 citation statements)

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“…The repulsive force between charges in the beam causes it to elongate and then become thinner. This elongating and thinning of the beam is the one that causes the fiber solidification [4]. PVDF membranes were prepared using 10 PVDF pellets of 0.06 gr each, dissolved in 2.4 gr of solvent (N, N Dimethylformamide (DMF) in order to obtain concentration of 20%.…”

Section: Methodsmentioning

confidence: 99%

Keratinocytes Growth Using Polyvinylidenefluoride (PVDF) Fiber Mats by Electrospun

et al. 2015

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Abstract-There is a growing demand for skin transplants; however, immunological incompatibility to such transplants remains as an unsolved issue. It is necessary to improve the current production methods for epidermal originated tissue. PVDF-based membranes have the potential to be used as an appropriate scaffold for skin cell growth. There are a wide range of medical applications and potential medical applications of PVDF. Keratinocytes on PVDF scaffolds had the greatest alkaline phosphatase activity and early mineralization. The results demonstrate the potential for the use of PVDF scaffolds for keratinocytes growth applications.)

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Section: Methodsmentioning

confidence: 99%

Keratinocytes Growth Using Polyvinylidenefluoride (PVDF) Fiber Mats by Electrospun

et al. 2015

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“…PVDF has received especial attention among a wide variety of polymers due to its thermal and chemical stability, mechanical and ferroelectric properties which can be easily conformed to complex surfaces [3,8,30,31,32,33,34,35]. Moreover, its biocompatibility makes PVDF sensors desirable candidates to be used in biomedical applications [31,33,36].…”

Section: Introductionmentioning

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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“…PVDF is the most significant and studied polymer by Andrew J. Lovinger [ 7 ]; PVDF responds to pressure and electric (piezoelectric effect), temperature, sound, light and even moisture [ 8 ]. Other polymeric materials, which are not pure and exhibit these properties, are ZnO/PVDF with graphene for pressure and temperature sensing, described by James S. Lee et al [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Developing an Ear Prosthesis Fabricated in Polyvinylidene Fluoride by a 3D Printer with Sensory Intrinsic Properties of Pressure and Temperature

Suaste-Gómez

Rodríguez-Roldán

Reyes-Cruz

et al. 2016

Sensors

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An ear prosthesis was designed in 3D computer graphics software and fabricated using a 3D printing process of polyvinylidene fluoride (PVDF) for use as a hearing aid. In addition, the prosthesis response to pressure and temperature was observed. Pyroelectric and piezoelectric properties of this ear prosthesis were investigated using an astable multivibrator circuit, as changes in PVDF permittivity were observed according to variations of pressure and temperature. The results show that this prosthesis is reliable for use under different conditions of pressure (0 Pa to 16,350 Pa) and temperature (2 °C to 90 °C). The experimental results show an almost linear and inversely proportional behavior between the stimuli of pressure and temperature with the frequency response. This 3D-printed ear prosthesis is a promising tool and has a great potentiality in the biomedical engineering field because of its ability to generate an electrical potential proportional to pressure and temperature, and it is the first time that such a device has been processed by the additive manufacturing process (3D printing). More work needs to be carried out to improve the performance, such as electrical stimulation of the nervous system, thereby extending the purpose of a prosthesis to the area of sensory perception.

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System for Controlling the Moisture of the Soil Using Humidity Sensors from a Polyvinylidenefluoride Fiber Mats

Cited by 8 publications

References 0 publications

Keratinocytes Growth Using Polyvinylidenefluoride (PVDF) Fiber Mats by Electrospun

Keratinocytes Growth Using Polyvinylidenefluoride (PVDF) Fiber Mats by Electrospun

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

Developing an Ear Prosthesis Fabricated in Polyvinylidene Fluoride by a 3D Printer with Sensory Intrinsic Properties of Pressure and Temperature

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