Electrophoretic Ink Display Prepared by Jelly Fig Pectin/Gelatin Microspheres

Abstract

A brand new Bio-Electronic ink (Bio-E ink) display device was prepared and characterized in this study. Semiconductor material, copper phthalocyanine (CuPc) was modified by cationic surfactants, cetylpyridinium chloride (CPC), as the core material, and the shell of capsule was prepared by jelly fig pectin, gelatin and sodium dodecyl sulphate (SDS). Here, jelly fig pectin was provided as the shell material for the first time. Chemical structure of the modified CuPc was characterized by Fourier Transform Infrared Spectrometer (FTIR). The core-shell microcapsules were achieved by coacervation method in an oil/water (O/W) emulsion system. The particle size and morphology of microcapsules were affected by the concentrations of SDS and pH values of the O/W emulsion system. A new microcapsule-based electrophoretic display device was presented. Its image display ability of the microcapsules electrophoretic device was presented as appropriated electric power was applied, and the response time was 0.06 sec under 0.1 V/mm of electric field. Moreover, we found that its image contrast ratio of display device was influenced by the particle sizes of the microcapsules.