Green synthetic route of carbon quantum dot‐reinforced graphene oxide‐poly(vinylidene fluoride‐co‐hexa fluoropropylene) nanocomposites: Toward high dielectric constant and suppressed loss

Abstract

A simple and green method was developed to fabricate carbon quantum dot@ graphene oxide filled poly (vinylidene fluoride‐co‐hexa‐fluoropropylene) [CQD@GO‐P(VDF‐HFP)] nanocomposite films via solution casting technique. The synthetic approach was to bring CQD from bilva leafs, a renewable and sustainable resource. The effect of CQD on dielectric properties, dielectric constant, and dielectric loss in the presence of GO along with P (VDF‐HFP) matrix were investigated. The result showed that the nanocomposites having 1.5 wt % of CQD@GO‐P(VDF‐HFP) with higher dielectric constant (≈144) at 100 Hz and suppressed loss (<1) at 1000 Hz, which is well supported by field emission scanning electron microscopy (FESEM) study. The FESEM study shows a river iceland morphology with a channel‐like structure along with voids and pores that may provide a conducting network, which tends to have Maxwell Wagner‐Sillars or interfacial polarization results in a high‐end properties outcome. Furthermore, the suppressed loss enhanced the possibility of end use performance of CQD@GO‐P(VDF‐HFP) matrix with a referral memorandum of percolation theory. Thus, the present work demonstrated a new approach to develop high dielectric constant and negligible loss materials in the field of embedded devices for electronic industries through green synthetic approach. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47850.

Complex Impedance Study of Graphite Nanopowder (GNP) Reinforced Polyvinyl Alcohol (PVA)‐Bismuth Ferrite (BiFeO3) Composite Films

“…At ambient temperature, these composites show both electric and magnetic hysteresis. [17,18] On the other hand, polymeric materials have good flexibility and suitable film-forming ability, better electrical resistance, and relatively high breakdown strength owing to which they can be widely used in the field of electronic industries. [19,20] Moreover, polyvinyl alcohol (PVA) is extensively used as a polymer matrix to fabricate polymer composites due to its easy processing, good film-forming ability, low cost, and excellent solubility in water.…”

Research status and future perspectives of low dimensional electromagnetic wave absorption materials

“…43 They possess a high dielectric constant of 144, attributed to the Maxwell Wagner-Sillars effect. 44 Additionally, the quantum size effect is a prominent strategy employed in the design and fabrication of exceptional electromagnetic microwave absorption materials. Prof. Wu rational designed ZnFe 2 O 4 QDs coated by hybrid amorphous carbon as effective EMW absorption materials.…”

Research Status and Future Perspectives of Low Dimensional Electromagnetic Wave Absorption Materials

“…Quantum dots (QDs) are zero-dimensional nano-level semiconductors, [43] and can reach a high dielectric constant of 144, which was ascribed to Maxwell Wagner-Sillars or interfacial polarization. [44] Moreover, the quantum size effect is a foregrounded strategy to design and fabricate excellent electromagnetic microwave absorption materials. Prof. Wu rational designed ZnFe2O4 QDs coated by hybrid amorphous carbon as effective EMW absorption materials.…”