Reduced graphene oxide (RGO)-induced compatibilization and reinforcement of poly(vinylidene fluoride) (PVDF)-thermoplastic polyurethane (TPU) binary polymer blend

2018 ◽  
Vol 136 (5) ◽  
pp. 47010 ◽  
Author(s):  
M. Bera ◽  
U. Saha ◽  
A. Bhardwaj ◽  
P. K. Maji
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Polymer Blend ◽  
Vinylidene Fluoride ◽  
Thermoplastic Polyurethane ◽  
Binary Polymer ◽  
Reduced Graphene ◽  
Poly Vinylidene Fluoride

scholarly journals Piezoelectric Response in Hybrid Micropillar Arrays of Poly(Vinylidene Fluoride) and Reduced Graphene Oxide

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1065 ◽  
Author(s):  
Igor O. Pariy ◽  
Anna A. Ivanova ◽  
Vladimir V. Shvartsman ◽  
Doru C. Lupascu ◽  
Gleb B. Sukhorukov ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Reduced Graphene Oxide ◽  
Vinylidene Fluoride ◽  
Piezoelectric Response ◽  
Response Force ◽  
Force Microscopy ◽  
Reduced Graphene ◽  
Poly Vinylidene Fluoride ◽  
Micropillar Arrays

This study was dedicated to the investigation of poly(vinylidene fluoride) (PVDF) micropillar arrays obtained by soft lithography followed by phase inversion at a low temperature. Reduced graphene oxide (rGO) was incorporated into the PVDF as a nucleating filler. The piezoelectric properties of the PVDF-rGO composite micropillars were explored via piezo-response force microscopy (PFM). Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) showed that α, β, and γ phases co-existed in all studied samples, with a predominance of the γ phase. The piezoresponse force microscopy (PFM) data provided the local piezoelectric response of the PVDF micropillars, which exhibited a temperature-induced downward dipole orientation in the pristine PVDF micropillars. The addition of rGO into the PVDF matrix resulted in a change in the preferred polarization direction, and the piezo-response phase angle changed from −120° to 20°–40°. The pristine PVDF and PVDF loaded with 0.1 wt % of rGO after low-temperature quenching were found to possess a piezoelectric response of 86 and 87 pm/V respectively, which are significantly higher than the |d33eff| in the case of imprinted PVDF 64 pm/V. Thus, the addition of rGO significantly affected the domain orientation (polarization) while quenching increased the piezoelectric response.

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