Development of Cyclic Tetrasiloxane Polymer as a High-Performance Dielectric and Hydrophobic Layer for Electrowetting Displays

Abstract

Cyclic tetrasiloxane polymer (CTP) has recently garnered interest as a hydrophobic material with unique properties. This study aims to enhance the dielectric constant of CTP films by introducing excess Si−H groups and to explore the impact of synthesis and processing conditions on the resulting properties. The film demonstrates high hydrophobicity, with contact angles of 107°in air and 165°in n-decane, along with a notable dielectric constant of 5.1°. Furthermore, the CTP film displays reversible electrowetting behavior with low contact angle hysteresis (2°) and possesses good transparency (∼99%) and thermal stability. As such, the CTP film has significant potential as a material for the electric wetting of hydrophobic dielectric layers and may serve as a promising alternative in electrowetting applications.

Preparation and Application of Polymer-Dispersed Liquid Crystal Film with Step-Driven Display Capability

“…Transparent display in particular has the potential to open up numerous new business dynamics for the ongoing display industry, as well as giving users a wonderful experience of a better quality. Over the last few years, a great deal of research has been conducted on transparent display technology, and a variety of approaches have been developed and put into practice, including plasma display [ 3 ], liquid crystal display (LCD) [ 4 ], electrowetting display [ 5 ], organic light-emitting diodes (OLEDs) [ 6 ], cholesteric liquid crystals (ChLCs) [ 7 ], and polymer-dispersed liquid crystal (PDLC) [ 8 ]. Among these candidates, the latter three are more widely used, yet OLEDs and CHLCs still have some existing drawbacks.…”