Abstract
Improvement of the binding of polypyrrole with PVDF (polyvinylidene fluoride) thin film using low pressure plasma was studied. The effects of various plasma gases i.e., Ar, O2 and Ar + O2 gases on surface roughness, surface chemistry and hydrophilicity were noted. The topographical change of the PVDF film was observed by means of scanning electron microscopy and chemical changes by X-ray photoelectron spectroscopy, with adhesion of polypyrrole (PPy) by abrasion tests and sheet resistance measurements. Results showed that the increase in roughness and surface functionalization by oxygen functional groups contributed to improved adhesion and Ar + O2 plasma gave better adhesion.
Highlights
IntroductionPVDF (polyvinylidene fluoride) is a semi-crystalline polymer in which each monomer has two dipole moments, one due to CF2 and the other due to CH2
PVDF is a semi-crystalline polymer in which each monomer has two dipole moments, one due to CF2 and the other due to CH2
Contact angle measurements show an improvement in the PVDF surface wettability after the plasma treatment
Summary
PVDF (polyvinylidene fluoride) is a semi-crystalline polymer in which each monomer has two dipole moments, one due to CF2 and the other due to CH2. The most common and most studied crystal structures are α and β phases [1,2]. The piezo-electric and pyro-electric properties of PVDF mainly. Materials 2013, 6 depend on the β-phase content and its growth can be induced by several techniques, the most common being the mechanical stretching of the α-phase films at a suitable temperature [3]. Mechanical strains due to the bending, vibration or compression of the thin-film structure can be the source of the energy generation [4,5]. A PVDF sensor was integrated into an automotive seat cover fabric to obtain information about the car occupant [1]. Choi et al [7] used conductive fabric and PVDF to monitor cardiorespiratory signals employing the piezoelectric property of PVDF
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