Hydrophysics

Hydrophysics

Investigation of the thermoacoustics effect of Graphene thin film synthesized by vacuum filtration on Polyvinylidene fluoride membrane

Document Type : Original Article

Authors
Mohaammadreza kazerani Vahdani 1
Arman Farahmand 2
1 Malek Ashtar University of Technology
2 The Petroleum and Chemical Engineering Department, shiraz university
Abstract
In this paper the thermos-acoustic properties of graphene oxide thin film samples synthesized using the vacuum filtration method on the porous Polyvinylidene fluoride membranes have been investigated experimentally. To this end the electric impedance of the samples measured after mounting proper electrodes. In spite of minor fluctuation, the measured impedances are constant and pure resistive. In the following by applying AC voltage in the frequency range 150Hz-20kHz, the radiated sound pressure level of the samples have been measured using the sound level meter. The results indicate that the frequency of the radiated sound waves is twice the frequency of the exciting voltage, as expected in the thermos-acoustic effects. In addition it is found that the radiated sound pressure level of the samples increase monotonically by frequency and the exciting electric voltage and decreases by the resistance of the samples. Investigation of the sound pressure as function of the frequency represents an additional peak in the frequency of applied voltage.
Keywords
thermoacoustic effect
graphene
thin film

Subjects

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Hydrophysics
Volume 6, Issue 2 - Serial Number 11
August 2020
Pages 105-111

  • Receive Date 27 May 2020
  • Revise Date 05 May 2021
  • Accept Date 26 June 2021