High Dielectric Nonpolar Interfacial Layers Derived from Nanocellulose for Electrowetting Devices. Issue 23 (9th November 2022)

• Record Type: Journal Article
• Authors: Xu, Zhuofan; Guo, Yuanyuan; Jiang, Hongwei; Luo, Qiguan; Lu, Xubing; Wang, Yao; Zhou, Guofu; Xu, Xuezhu
• Is Part Of: Macromolecular chemistry and physics. Volume 223:Issue 23(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-09
• Subjects: cellulose nanocrystals -- dielectric constant -- electrowetting -- fluoropolymer -- surface‐initiated ATRP; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.202200156
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract: A dielectric material is a particular type of insulator that does not conduct electricity but gets polarized when subjected to electricity, which is a crucial part of electronics such as cables, capacitors, displays, transformers, etc. Currently, synthesizing a nonpolar dielectric remains challenging. In this study, a method to make a high dielectric and nonpolar fluoropolymer and its nanocomposites based on cellulose nanocrystals (CNCs) by grafting it with nonpolar polymer 2, 2, 2‐trifluoroethyl methacrylate is reported. A high dielectric constant but nonpolar nanocellulose material is obtained for the first time. This material has an anisotropic arrangement of dipoles with a high polarizability effect, thereby displaying excellent dielectric properties (e.g., dielectric constant and loss: 8.59 and 0.017 at 10 kHz) and high stability (dielectric constant at 8.21 at 1 MHz). The dielectric material is miscible as an additive with other commercial fluoropolymer plastic, which demonstrates a high breakage voltage ranging from 4.6 to 9.2 kV/0.1 mm. When it is used as an interfacial layer in electrowetting display devices, it also demonstrated a low voltage driven and fast‐response effect. The excellent dielectric performances allow to develop more high‐performance dielectrics and electronics such as memories, sensors, actuators, wires, and film capacitors. Abstract : Synthesis of organic nonpolar dielectrics with a well‐designed anisotropic nanostructure with high polarity/polarizability effect is reported. this new type of material shows good electrical properties including 1) excellent dielectric constant (e.g., dielectric constant and loss are 8.59 and 0.0179 at 1 kHz) and high stability at high applied electrical frequencies that guarantee its use in various electronic devices.