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Issue 10, 2020, Issue in Progress

High dielectric thin films based on barium titanate and cellulose nanofibrils

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Abstract

A series of composite films based on tetragonal barium titanate (BTO) and cellulose nanofibrils (CNF) with high dielectric constant are prepared using a casting method in aqueous solution. No organic solvent is involved during the preparation, which demonstrates the environmental friendliness of the novel material. With less than 30 wt% of filler loading, the excellent distribution of BTO nanoparticles within the CNF matrix is revealed by the FE-SEM images. The dielectric constant of the CNF/BTO (30 wt%) composite film reaches up to 188.03, which is about seven times higher than that of pure CNF (25.24), while the loss tangent only rises slightly from 0.70 to 1.21 (at 1 kHz). The thin films kept their dielectric properties on an acceptable level after repeatedly twisting or rolling 10 times. The improvement of thermal stability is observed with the presence of BTO. The outstanding dielectric properties of the CNF/BTO composite film indicates its great potential to be utilized in energy storage applications.

Graphical abstract: High dielectric thin films based on barium titanate and cellulose nanofibrils

Supplementary files

Article information


Submitted
25 Dec 2019
Accepted
31 Jan 2020
First published
04 Feb 2020

This article is Open Access

RSC Adv., 2020,10, 5758-5765
Article type
Paper

High dielectric thin films based on barium titanate and cellulose nanofibrils

J. Tao, S. Cao, R. Feng and Y. Deng, RSC Adv., 2020, 10, 5758 DOI: 10.1039/C9RA10916A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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