Crystal structure transformation and dielectric properties of polymer composites incorporating zinc oxide nanorods

Abstract

Abstract.Zinc oxide (ZnO) nanorods were synthesized using a modified wet chemical method. Poly(vinylidene fluoride-co-hexafluoropropylene), P(VDF-HFP), nanocomposites with different ZnO nanorods loadings were prepared via a solution blend route. Field emission scanning electron microscopic (FESEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR) were used to investigate the structure and morphology of the nanocomposites. XRD and FT-IR data indicate that the incorporation of ZnO nanorods promote the crystalline structure transformation of P(VDF-HFP). As the content of ZnO nanorods increases, the β phase structure increases while the α phase decreases. In addition, the dielectric properties of the P(VDF-HFP) and its composites were systematically studied.

Facile Photo-cross-linking System for Polymeric Gate Dielectric Materials toward Solution-Processed Organic Field-Effect Transistors: Role of a Cross-linker in Various Polymer Types

“…38,39 In addition, the one-dimensional (1D) X-ray diffraction (XRD) patterns of PVDF-HFP and FPVDF-HFP show very similar peaks at 2θ = 17.67, 18.41, 20.05, and 26.71°, which correspond to the (100), (020), (110), and (021) peaks, respectively. 40 Therefore, our series of FPA crosslinkers did not affect the structure or orientation of the crystalline grains in PVDF-HFP. A comparison of the observed surface properties of the pristine polymeric films and the UVcross-linked films containing 2 wt % FPA confirms that the surface properties of our cross-linked layers were nearly identical to those of the pristine polymeric layer in some cases and that the UV-cross-linked films were much more chemically robust.…”

“…However, the cross-linked FPVDF-HFP showed slightly smaller crystal grains compared to PVDF-HFP, which had large, interconnected crystal grains. This type of decrease in size generally occurs when well-mixed low-molecular-weight materials and high-molecular-weight polymers are used in a blend system, and the two molecules interact to reduce the crystal size compared to that of each material. , In addition, the one-dimensional (1D) X-ray diffraction (XRD) patterns of PVDF-HFP and FPVDF-HFP show very similar peaks at 2 θ = 17.67, 18.41, 20.05, and 26.71°, which correspond to the (100), (020), (110), and (021) peaks, respectively . Therefore, our series of FPA cross-linkers did not affect the structure or orientation of the crystalline grains in PVDF-HFP.…”

Progress of heat resistant dielectric polymer nanocomposites with high dielectric constant

“…Copyright 2013 Elsevier Ltd.) Fig. 12 Temperature dependency of the conductivity of ZnO nanorod (40 wt%)/P(VDF-HFP) (Reprinted with permission from [167]. Copyright 2014 Springer Nature.)…”

“…The conductivity of composite increases as temperature increases. This can be rationalised in terms of the increase in conductivity of ZnO nanorods [167].…”

Preparation and characterization of Cellulose-ZnO nanolayer film by blending method

“…ZnO nanoparticle seeding can be prepared by wet chemical method or sputtering technique. [8][9][10] However, wet chemical method could not properly produce homogeneous distribution of ZnO seed in the matrix layer and it is difficult to prepare hybrid films in bigger size. To overcome this problem we are demonstrating preparation of cellulose-ZnO hybrid free standing films by simple blending method with the help of dispersing agent.…”